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Complete Wireless Communications Subsystem

The WB40NBT is a Wi-Fi® and Bluetooth® Device Server module that supports 802.11a/b/g/n and Bluetooth 2.1. The module is a complete wireless communications subsystem that may be integrated into a variety of host devices via a number of available electronic and logical interfaces including UART, SPI, SDIO and Ethernet. Incorporating the Laird SSD40NBT radio, the WB40NBT provides all of Laird's hardware and software capabilities including dual band antenna diversity, an expanded operating temperature range, a fully integrated software suite and advanced Wi-Fi/Bluetooth coexistence. The module features a fully integrated IP stack and web server running on a Linux 3.0 kernel and may be accessed via a provided command line or browser interface for easy configuration and monitoring.

Click here to visit the Software Download Center. 

Download WB40NBT Hardware Integration Guide (PDF) (version 3.6, 10/14/13)
Download WB40NBT 3D Model (SolidWorks 2012 3D Model) 

NOTE: The Bluetooth Special Interest Group (SIG) has recently implemented changes to the End Product Listing (EPL) process. For more information about this update, please see the Bluetooth SIG Listing Process Fact Sheet and FAQs About the Updated Qualification and Listing Process.

Our Response to Shellshock

Recently a flaw was discovered in the Unix Bash shell that creates attack vulnerabilities in Linux machines. Note that this vulnerability does NOT apply to the Laird WB45NBT or WB40NBT (our wireless bridge communications subsystems). The following are the main reasons why this issue isn’t relevant to these products:

  • Our WB45NBT and WB40NBT do not use Bash, the affected shell.
  • These products never pass unfiltered or unvalidated user input to any shell script.
  • Rather than CGI shell scripts, we use PHP which is not vulnerable to this attack.
Physical Interface Kyocera Elco Series 5046 120 Pin Connector P/N 24 5046 120 000 829+ (see Mounting Instructions for mating connector options)
Ethernet Interface 10/100 Mbps RMII Reduced Media Independent Interface
Asynchronous Serial Port Interfaces

(3.3 V TTL interface)  
  • Nine-wire UART DCE with full modem signaling, and carrier detect
  • Four-wire UART with hardware handshaking
  • Two-wire UART (console)
Synchronous Serial Port Interface Six Wire
Secure Digital I/O Interface Six Wire
  • Note: Cannot be used simultaneously with SPI interface. 
SPI Interface Five Wire, Master and Slave modes supported
  • Note: Cannot be used simultaneously with SDIO interface. 
USB Interfaces
  • Two 12 Mbps USB Host Port
  • One 12 Mbps USB Device Port
Two Wire Interface Two-wire I2C (Inter-IC) or CANbus (Controller-area Network)
Antenna Interface 2 Hirose U.FL connectors for dual-band antenna diversity, 50 ohm
Wi-Fi® Interface Laird SSD40NBT
Processor Chip Set Atmel 400MHz ARM 9, P/N AT91SAM9G20-CU
Operating System Embedded Linux, 3.2 kernel
Memory 32 MB SDRAM
Storage 64 MB NAND flash
Input Voltage Requirements 3.3 VDC +/- 10%
Wi-Fi® Current Consumption (at maximum transmit power setting)

Note: Standby refers to the radio operating in PM1 powersave mode.

Note: During calibration and initialization, the WB40NBT may reach a 700 mA peak, which only lasts several milliseconds.
  • Transmit: 389 mA (1218 mW) 
  • Receive: 167 mA (551 mW) 
  • Standby: 79 mA (261 mW) 
  • Transmit: 392 mA (1294 mW) 
  • Receive: 167 mA (551 mW) 
  • Standby: 79 mA (261 mW) 
  • Transmit: 355 mA (1294 mW) 
  • Receive: 167 mA (551 mW) 
  • Standby: 79 mA (261 mW) 
    802.11n (2.4 GHz)
  • Transmit: 324 mA (1069 mW) 
  • Receive: 167 mA (551 mW) 
  • Standby: 79 mA (261 mW) 
    802.11n (5 GHz)
  • Transmit: 359 mA (1185 mW) 
  • Receive: 180 mA (594 mW) 
  • Standby: 10 mA (33 mW) 
  • Transmit: N/A 
  • Receive: TBD 
Operating Temperature -30° to 80°C (-22° to 176°F)
Operating Humidity 10 to 90% (non-condensing)
Storage Temperature -30° to 85°C (-22° to 185°F)
Storage Humidity 10 to 90% (non-condensing)
Maximum Electrostatic Discharge
  • Maximum Contact Discharge (CD): 4 kV
  • Maximum Air Discharge (AD): 8 kV

Note: Length, width, and thickness measurements include the metal shielding.  
47 mm (1.85 in.)
Width 37 mm (1.46 in.)
Thickness 3.6 mm (0.14 in.)
Weight 7.8 g (0.275 oz.)
Mounting Connector and Through Holes, See "Mounting" section for more information.
Wi-Fi Media
  • Direct Sequence-Spread Spectrum (DSSS)
  • Complementary Code Keying (CCK)
  • Orthogonal Frequency Divisional Multiplexing (OFDM)
Wi-Fi Media Access Protocol Carrier sense multiple access with collision avoidance (CSMA/CA)
Network Architecture Types Infrastructure and Ad Hoc
Wi-Fi Standards IEEE 802.11a, 802.11b, 802.11d, 802.11e, 802.11g, 802.11h, 802.11i, 802.11n
Wi-Fi Data Rates Supported
  • 802.11a (OFDM): 6, 9, 12, 18, 24, 36, 48, 54 Mbps
  • 802.11b (DSSS): 1, 2, 5.5, 11 Mbps
  • 802.11g (OFDM): 6, 9, 12, 18, 24, 36, 48, 54 Mbps
  • 802.11n (OFDM, MCS 0-7) 6.5, 7.2, 13.0, 14.4, 19.5, 21.7, 26.0, 28.9, 39.0, 43.3, 52.0, 57.8, 58.5, 65.0, 72.2 Mbps
Wi-Fi Modulation
  • 1, 6, 6.5, 7.2, 9 Mbps: BPSK 
  • 2, 12, 13, 14.4, 18, 19.5, 21.7 Mbps: QPSK 
  • 5.5, 11 Mbps:CCK 
  • 24, 26, 28.9, 36, 39, 43.3 Mbps: 16-QAM 
  • 48, 52, 54, 57.8, 65, 72.2 Mbps: 64-QAM 
802.11n Spatial Streams 1 (single Input, Single Output)
Regulatory Domain Support
  • FCC (Americas, Parts of Asia and Middle East)
  • ETSI (Europe, Middle East, Africa and Parts of Asia)
  • MIC (formerly TELEC) (Japan)
  • KC (Formerly KCC) (Korea)
2.4 GHz Frequency Bands
  • 2.4 GHz to 2.483 GHz
  • 2.4 GHz to 2.483 GHz
    MIC (Japan):
  • 2.4 GHz to 2.495 GHz
  • 2.4 GHz to 2.483 GHz
2.4 GHz Operating Channels
  • ETSI:13 (3 non-overlapping) 
  • FCC:11 (3 non-overlapping) 
  • MIC:14 (4 non-overlapping) 
  • KC:13 (3 non-overlapping) 
5 GHz Frequency Bands
  • 5.15 GHz to 5.35 GHz
  • 5.47 GHz to 5.725 GHz
  • 5.15 GHz to 5.35 GHz
  • 5.47 GHz to 5.725 GHz
  • 5.725 GHz to 5.82 GHz
    MIC (Japan):
  • 5.15 GHz to 5.35 GHz
  • 5.15 GHz to 5.35 GHz
  • 5.725 GHz to 5.825 GHz
5 GHz Operating Channels
  • ETSI: 19 non-overlapping 
  • FCC: 23 non-overlapping 
  • MIC: 8 non-overlapping 
  • KC: 12 non-overlapping 
Maximum Transmit Power

Maximum transmit power will vary according to individual country regulations. All values nominal, +/-2 dBm

Note: Laird 40 series radios support a single spatial stream and 20 MHz channels only.
  • 6 Mbps 16 dBm (40 mW)
  • 54 Mbps 14 dBm (25 mW)
  • 1 Mbps 17 dBm (50 mW)
  • 11 Mbps 16 dBm (40 mW)
  • 6 Mbps 15 dBm (32 mW)
  • 54 Mbps 13 dBm (20 mW)
    802.11n (2.4GHz):
  • 6.5 Mbps (MCS0) 15 dBm (32 mW)
  • 65 Mbps (MCS7) 11 dBm (13 mW)
    802.11n (5 GHz):
  • 6.5 Mbps (MCS0) 15 dBm (32 mW)
  • 65 Mbps (MCS7) 11 dBm (13 mW)
  • 0 dBm (1 mW) (Class 2)
Typical Receiver Sensitivity  
  • 6 Mbps: -90 dBm  
  • 24 Mbps: -84 dBm  
  • 54 Mbps: -75 dBm (PER <= 10%)  
  • 1 Mbps: -96dBm  
  • 11 Mbps: -89 dBm (PER <=10%)  
  • 6 Mbps: -90 dBm  
  • 24 Mbps: -84 dBm  
  • 54 Mbps: -74 dBm (PER <= 10%)  
    802.11n (2.4 GHz):
  • MCS0 6.5 Mbps: -90 dBm  
  • MCS4 39 Mbps: -79 dBm  
  • MCS7 65 Mbps: -72 dBm  
    802.11n (5 GHz):
  • MCS0 6.5 Mbps: -89 dBm  
  • MCS4 39 Mbps: -79 dBm  
  • MCS7 65 Mbps: -71 dBm  
  • 1 Mbps: TBD  
  • 2 Mbps: TBD  
  • 3 Mbps: TBD  
  • Wireless Equivalent Privacy (WEP)
  • Wi-Fi® Protected Access (WPA)
  • IEEE 802.11i (WPA2)
  • Wireless Equivalent Privacy (WEP, RC4 Algorithm)
  • Temporal Key Integrity Protocol (TKIP, RC4 Algorithm)
  • Advanced Encryption Standard (AES, Rijndael Algorithm)
    Encryption Key Provisioning:
  • Static (40 and 128 bit lengths)
  • Pre-Shared (PSK)
  • Dynamic
    802.1X Extensible Authentication Protocol Types:
  • LEAP
    MIC Regulatory Domain (Certifications are pending):
  • Article 2 Item 19, Category WW (2.4GHz Channels 1-13)
  • Article 2 Item 19-2, Category GZ (2.4GHz Channel 14)
  • Article 2 Item 19-3 Category XW (5150-5250 W52 & 5250-5350 W53) VCCI Class B
  • Article 2-1 Item 19-2 (BT 2.1)
Certifications Cisco_Compatible_35x30 Cisco Compatible Extensions (Version 4)
Warranty Limited Lifetime 

All specifications are subject to change without notice 

The WB40NBT is certified for compliance to various CE, ETSI, FCC, NCC, Industry Canada, and Wi-Fi® Alliance standards with certification to MIC (formerly TELEC) standards and Cisco Compatible Extensions (CCX) specifications planned for the near term. The grants, approvals, and formal test reports associated with these certifications may be leveraged by Laird Technologies customers to achieve their required device certifications. The degree to which customers can leverage these Laird certifications is dependent upon the regulatory agency, industry body, and the type of end device.

If any additional information or guidance is required, please contact the Laird wireless certifications group via email or by telephone at 330.434.7929 


The WB40NBT has been tested for compliance to various CE and ETSI standards and specifications:

This testing was conducted with the following antennas:

These formal test reports may be leveraged by mobile and portable device vendors as part of their self declaration to obtain the CE mark required by members of the European Union. ETSI/CE rules differ from those of the FCC and IC in that there is no provision for a modular approval. All approvals and certifications must exist at the device level rather than the module (radio) level.

The WB40NBT is fully compliant with Annex IV procedures in article 10.5 of R&TTE directive 99/5/EC.

Like all Laird Wi-Fi modules, the WB40NBT is fully compliant with European Union Directive 2011/65/EU or Reduction of Hazardous Substances (RoHS) and Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) as per our Declaration of Compliance.

Laird 40NBT Series EN 300 328 v1.8.1 Updates

EN 300 328 v.1.8.1, which officially goes into effect on January 2015, includes new mandatory spectrum sharing requirements with the goal of reducing interference within the 2.4 GHz band. The following are the two main ways to achieve this: 

  • By incorporating adaptivity functionality such as DAA (Detect and Avoid), CCA (Clear Channel Assessment), and LBT (Listen Before Talk). 
  • By reducing the radio’s power, duty cycle, or both

The Laird 40NBT series radios (WB40NBT, MSD40NBT, and SSD40NBT) have successfully tested to the adaptivity requirements of the new standard. See the following for additional information: 

Note: Testing for the MSD40NBT applies to both the SSD40NBT and the WB40NBT. These radios will have the full EN 300 328 v1.8.1 in place before the end of 2014.





Laird has received the following FCC grants for the WB40NBT (FCC identifier TWG-SDCWB40NBT):

FCC Part 15.247 Subpart C

This grant relates to operation in the 2.412 to 2.462 GHz (ISM) and 5.745 to 5.805 GHz (UNII-3) frequency bands.

FCC Part 15.407 Subpart E

This grant relates to operation in the 5.180 to 5.240 GHz (UNII-1), 5.280 to 5.320 GHz (UNII-2), and 5.500 to 5.700 GHz (UNII-2 Extended) frequency bands.

These grants were secured with two dual band antennas:

The above grants are Modular Approvals. Specific limitations are indicated on each grant.

When using this grant, the WB40NBT must be installed only in mobile devices (devices which typically operate at distances greater than 20cm, or 7.9 inches, from the human body). When certifying portable devices (those that typically operate at distances less than 20cm from the human body) a new grant must be secured by the device vendor.

Note: Laird test data may be leveraged by the device vendor to minimize the cost and time associated with the certification process.

Industry Canada

The WB40NBT is certified to the Industry Canada (IC) RSS-210 standard. IC 6616A-SDCWB40NBT certification is based on FCC certification testing, using the same antennas and transmit power and covering the same frequency bands. Test reports and data sheets relevant to this certification may be found in the FCC section above.

National Communications Commission (NCC)

The WB40NBT (NCC ID CCAB12LP1330T6) is certified to the National Communications Commission (NCC) standards:

Australian/New Zealand Standard (AS/NZS)

The WB40NBT is certified to the following Australian/New Zealand standard:

Wi-Fi Alliance

Laird has submitted the WB40NBT to an authorized Wi-Fi Alliance test lab and as a result has received an Embedded Client Certification for the following standards: 802.11a, 802.11b, 802.11g, WPA (both personal and enterprise), and WPA2/802.11i (both personal and enterprise). For those host devices which include the WB40NBT, the vendor may assert that their device incorporates a Wi-Fi Certified Embedded Client. The vendor need not be a member of the Wi-Fi Alliance to make this assertion but may not use the "Wi-Fi Certified" logo in conjunction with their device.

If the device vendor is a member of the Wi-Fi Alliance, they may have WFA certification transferred to them only if they integrate the already-certified module into their device in a "hands off" manner; in other words, make no changes during integration that would impact the way in which the module operates. Laird will provide consultative services to those vendors who choose to pursue a Wi-Fi Alliance certification for their Laird-equipped devices.

Location Phone Number Email

Americas +1-800-492-2320 WirelessInfo@lairdtech.com

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Manufacturer Reps


Europe +44-1628-858-940 WirelessInfo@lairdtech.com

Request InformationStock Locator Button Embedded Wireless Solutions Technical Support 

Hong Kong +852-2923-0610 (Sales)
+852-2923-0609 (Support)

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Warranty Statement

Laird Technologies warrants to the original end user customer of its products that its products are free from defects in material and workmanship. Subject to the conditions and limitations set forth below, Laird Technologies will, at its option, either repair or replace any part of its products that prove defective by reason of improper workmanship or materials. Repaired parts or replacement products will be provided by Laird Technologies on an exchange basis, and will be either new or refurbished to be functionally equivalent to new. If Laird Technologies is unable to repair or replace the product, it will refund the current value of the product at the time the warranty claim is made.

This limited warranty does not cover any damage to this product that results from improper installation, accident, abuse, misuse, natural disaster, insufficient or excessive electrical supply, abnormal mechanical or environmental conditions, or any unauthorized disassembly, repair, or modification. This limited warranty also does not apply to any product on which the original identification information has been altered, obliterated or removed, has not been handled or packaged correctly, has been sold as second-hand or has been resold.

This limited warranty covers only repair, replacement or refund for defective Laird Technologies products, as provided above. Laird Technologies is not liable for, and does not cover under warranty, any loss of data or any costs associated with determining the source of system problems or removing, servicing or installing Laird Technologies products. This warranty excludes 3rd party software, connected equipment or stored data. In the event of a claim, Laird Technologies' sole obligation shall be replacement of the hardware.


This limited warranty applies only to the original end user customer of the product. This limited warranty is non-transferable. This limited warranty is in force for the useful lifetime of the original end product into which the Laird Technologies product is installed. Useful lifetime of the original end product may vary but is not to exceed five (5) years from the original date of the end product purchase. Any repair, component replacement or modification to the original product constitutes the end of the lifetime of the end product as defined here.


Warranty on Laird Technologies products are only applicable if the parts were purchased from Laird Technologies authorized OEMs/distributors/resellers or directly from Laird Technologies.


The following parts are not covered by this warranty:

  • Products without the label containing Laird Technologies' serial number or MAC address
  • Products that are purchased from other end users
  • Products that Laird Technologies determines were not purchased through Laird Technologies authorized OEMs/distributors/resellers or directly from Laird Technologies
  • All EOL claims to return back to point of purchase or respective distributors.


The foregoing is the complete warranty for Laird Technologies products and supersedes all other warranties and representations, whether oral or written. Except as expressly set forth above, no other warranties are made with respect to Laird Technologies products and Laird Technologies expressly disclaims all warranties not stated herein, including, to the extent permitted by applicable law, any warranty that may exist under national, state, provincial or local law including but not limited to any implied warranty of non-infringement, merchantability or fitness for a particular purpose. All warranties, whether express or implied, are limited to the periods of time set forth above. 

Laird Technologies products are not authorized for use as critical components in life support equipment or for applications in which the failure or malfunction of the products would create a situation in which personal injury or death is likely to occur. Laird Technologies shall not be liable for the death of any person or any loss, injury or damage to persons or property by use of Laird Technologies products.

Laird Technologies' total liability under this or any other warranty, express or implied, is limited to repair, replacement or refund. Repair, replacement or refund are the sole and exclusive remedies for breach of warranty or any other legal theory. To the fullest extent permitted by applicable law, Laird Technologies shall not be liable to the purchaser or end user customer of a Laird Technologies product for any damages, expenses, lost data, lost revenues, lost savings, lost profits, or any other incidental or consequential damages arising from the purchase, use or inability to use the Laird Technologies product, even if Laird Technologies has been advised of the possibility of such damages.