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Silicon Labs SLWRB4181C

Name: SLWRB4181C
Brand: Silicon Labs
SKU: SLWRB4181C
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SLWRB4181C

Manufacturer:: Silicon Labs

Category:: RF, RFID, Wireless Evaluation Boards

Package:

Datasheet:: SLWRB4181C.pdf

Description:: EFR32XG21 2.4GHZ +10 DBM RADIO B

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:295

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Product details

Overview

SLWRB4181C from Silicon Labs is a Wireless Starter Kit configuration comprising the BRD4181C radio board-featuring the EFR32MG21B010F1024IM32 Wireless Gecko SoC (1024 kB Flash, 96 kB RAM), 2.4 GHz inverted-F PCB antenna, and 10 dBm RF output-plugged into a compatible Wireless STK Mainboard for rapid prototyping of Bluetooth LE, Zigbee, and Thread applications.

For engineers reviewing the SLWRB4181C datasheet, SLWRB4181C pinout, SLWRB4181C application, or SLWRB4181C equivalent, this kit delivers integrated J-Link debugging, Advanced Energy Monitor (AEM) current profiling, Packet Trace Interface (PTI), Virtual COM port, and EXP header expansion-all validated for EFR32xG21B-based 2.4 GHz wireless development.

Technical Context

The SLWRB4181C is not a standalone IC or component but a pre-integrated evaluation system: BRD4181C serves as a plug-in radio board hosting the EFR32MG21B010F1024IM32 SoC, while full functionality requires pairing with the Wireless STK Mainboard (sold separately). The mainboard provides on-board J-Link debugger, AEM, PTI, VCOM, Ethernet/USB connectivity, and 128×128 memory LCD-TFT.

Hardware interaction occurs via standardized interfaces: the EXP header exposes SPI/UART/I²C and GPIOs; breakout pads route all EFR32 pins; Simplicity and Debug connectors enable external target debugging and packet trace; power selection (AEM/USB/BAT) isolates measurement domains. No internal RF front-end components or discrete RF matching are user-accessible-the BRD4181C is a complete, calibrated 2.4 GHz reference design.

Key Specifications

Parameter	Value and Actual Design Meaning
Kit Composition	1× BRD4181C radio board only; Wireless STK Mainboard must be ordered separately.
Core SoC	EF R32MG21B010F1024IM32: ARM Cortex-M33, 1024 kB Flash, 96 kB RAM, 2.4 GHz 10 dBm transceiver.
RF Interface	Integrated inverted-F PCB antenna tuned for 2.4 GHz ISM band; no SMA connector or RF test port.
Debug & Trace	SEGGER J-Link on mainboard supports SWD, ETM trace, PTI sync/data, and VCOM over USB/Ethernet.
Power Monitoring	Advanced Energy Monitor (AEM) measures real-time current/voltage of EFR32 when power switch is in AEM position.
Expansion	20-pin EXP header with fixed SPI/UART/I²C locations + general-purpose GPIO; breakout pads expose all EFR32 pins.

Availability

SLWRB4181C is available at Aetrix Electronics and suitable for wireless protocol evaluation, low-power IoT sensor node development, and RF range testing requiring stable component supply and full debug visibility.

Supply support for SLWRB4181C includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Silicon Labs is a fabless semiconductor company specializing in secure, energy-efficient wireless and wired connectivity solutions for IoT, industrial, and consumer markets.

The SLWRB4181C belongs to Silicon Labs' Wireless Starter Kit family, designed to accelerate time-to-first-packet for developers adopting EFR32xG21B SoCs in Bluetooth LE, Zigbee, Thread, and proprietary 2.4 GHz protocols.

FAQ

What is included in the SLWRB4181C kit?

The SLWRB4181C contains one BRD4181C radio board only. It does not include the Wireless STK Mainboard, USB cable, battery, or software. The mainboard-required for debugging, energy monitoring, and display-is a separate orderable part (e.g., SLWSTK6000B). Simplicity Studio software is free to download from silabs.com.

Does SLWRB4181C support Bluetooth LE, Zigbee, and Thread out of the box?

Yes-SLWRB4181C hosts the EFR32MG21B010F1024IM32 SoC, which natively supports Bluetooth LE 5.0, Zigbee 3.0, Thread 1.1+, and proprietary 2.4 GHz protocols. Pre-certified stack binaries and example projects are provided in Simplicity Studio, enabling immediate protocol validation without custom RF tuning.

Can SLWRB4181C be used for current consumption measurements?

Yes, but only when paired with the Wireless STK Mainboard and configured correctly: set the mainboard's power switch to "AEM", connect via USB, and use Energy Profiler in Simplicity Studio. The AEM measures EFR32 current directly in the VMCU domain; coin-cell or external battery operation disables AEM functionality.

Is the antenna on SLWRB4181C replaceable or tunable?

No-the SLWRB4181C integrates a fixed inverted-F PCB antenna optimized for 2.4 GHz operation with 10 dBm output. There is no SMA connector, U.FL interface, or matching network access point. Antenna performance is validated per FCC/CE radiated emission requirements; no user adjustment is supported.

How do I connect external hardware to SLWRB4181C for debugging or power profiling?

Use the Simplicity Connector (20-pin) or Mini Simplicity Connector (10-pin) on the mainboard: these provide VMCU (AEM-monitored), VCOM_TX/RX, PTI signals, and SWD debug lines. For external target debugging, configure the mainboard's debug mode to "Debug OUT" and connect via the Debug or Simplicity Connector-no modifications to SLWRB4181C itself are needed.

SLWRB4181C Specifications

Product attributes: Attribute value

Manufacturer:: Silicon Labs

Series:: -

Packaging:: Bulk

Product Status:: Active

Type:: Transceiver; Bluetooth® 5.x (BLE)

Frequency:: 2.4GHz

Contents:: Board(s)

Utilized IC / Part:: EFR32xG21

SLWRB4181C FAQ

1.How can I place an order for SLWRB4181C through Aetrix?

Please submit a Request for Quotation (RFQ) for SLWRB4181C on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SLWRB4181C reliable?

The price and inventory of SLWRB4181C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SLWRB4181C is usually 5 days.

3.What payment methods are accepted for SLWRB4181C?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SLWRB4181C transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SLWRB4181C?

SLWRB4181C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SLWRB4181C order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SLWRB4181C?

For technical support, including SLWRB4181C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SLWRB4181C requirements.

6.How does Aetrix verify that SLWRB4181C is sourced from the original manufacturer or authorized distributors?

All SLWRB4181C products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SLWRB4181C meets industry standards.

7.What is the process for return or replacement of SLWRB4181C?

All SLWRB4181C units undergo pre-shipment inspection (PSI). If there is an issue with SLWRB4181C, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SLWRB4181C part is unused and in its original packaging.

Return procedure for SLWRB4181C:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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