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Silicon Labs SLWRB4151A

Name: SLWRB4151A
Brand: Silicon Labs
SKU: SLWRB4151A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SLWRB4151A

Manufacturer:: Silicon Labs

Category:: RF, RFID, Wireless Evaluation Boards

Package:

Datasheet:: SLWRB4151A.pdf

Description:: EFR32MG 2.4 GHZ 19.5 DBM RADIO B

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,950

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Product details

Overview

SLWRB4151A from Silicon Labs is a 2.4 GHz EFR32 Mighty Gecko Wireless SoC reference radio board featuring the EFR32MG1P232F256GM48 IC, ARM Cortex-M4 with FPU, 256 kB flash/32 kB RAM, and integrated PCB Inverted-F antenna delivering 19.5 dBm output power. It serves as a development and RF performance evaluation platform when connected to the Wireless Starter Kit Mainboard.

For engineers reviewing the SLWRB4151A datasheet, SLWRB4151A pinout, SLWRB4151A application, or SLWRB4151A equivalent, this board enables rapid prototyping of Bluetooth Low Energy, Zigbee, Thread, and proprietary 2.4 GHz wireless protocols with full GPIO access, debug interfaces (SWD), packet trace, and configurable RF path selection between onboard antenna and UFL connector.

Technical Context

The SLWRB4151A implements a complete 2.4 GHz RF subsystem centered on the EFR32MG1P232F256GM48 SoC, including dedicated LFXO (32.768 kHz) and HFXO (38.4 MHz) crystals, a four-element impedance-matching and harmonic-filter network optimized for 19.5 dBm operation, and dual RF output routing-either to the printed Inverted-F antenna (50 Ω matched, EIRP up to 21.9 dBm) or via UFL connector for conducted testing.

Power delivery is segmented: RFVDD (1.8 V) supplied by the SoC's internal DC-DC converter, while PAVDD (3.3 V) is sourced externally from the mainboard. The board provides full access to all EFR32MG1 GPIOs, UART, SPI, I²C, and debug signals through two polarized 0.05" pitch connectors, enabling hardware integration and signal monitoring across all functional blocks.

Key Specifications

Parameter	Value and Actual Design Meaning
Core IC	EFR32MG1P232F256GM48: 32-bit ARM Cortex-M4 with FPU, 256 kB flash, 32 kB RAM
RF Band & Power	2400–2483.5 MHz ISM band; typical conducted output = 19.5 dBm, radiated EIRP = 21.9 dBm
Antenna Interface	Integrated 50 Ω Inverted-F PCB antenna + optional UFL connector (SMA adapter compatible)
Crystal Oscillators	LFXO: 32.768 kHz; HFXO: 38.4 MHz - both mounted and validated for timing stability
Matching Network	Four-element LC filter (C1=2.0 pF, C2=1.0 pF, L1=1.8 nH, L2=3.0 nH) for impedance match and harmonic suppression
EMC Compliance	FCC 15.247 and ETSI EN 300-328 compliant; harmonics measured ≤ –47.8 dBm (2nd) and ≤ –52.2 dBm (3rd)
Connector Interface	Dual-row, polarized 0.05" pitch headers providing full GPIO, RESETn, SWD, UART, SPI, I²C, and PTI signals

Availability

SLWRB4151A is available at Aetrix Electronics and suitable for wireless protocol development, RF matching validation, and regulatory pre-compliance testing requiring stable component supply, repeatable reference design fidelity, and full debug accessibility.

Supply support for SLWRB4151A 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 MCU and wireless SoC solutions for IoT edge devices.

The SLWRB4151A belongs to the EFR32 Mighty Gecko Radio Board product line, designed explicitly to accelerate development and RF characterization of 2.4 GHz mesh and point-to-point wireless applications using Silicon Labs' low-power wireless SoCs.

FAQ

What is the primary function of the SLWRB4151A?

The SLWRB4151A is a reference radio board built around the EFR32MG1P232F256GM48 Wireless SoC. Its primary function is to serve as a development and RF evaluation platform for 2.4 GHz wireless protocols-including Zigbee, Thread, Bluetooth Low Energy, and proprietary stacks-when paired with the Wireless Starter Kit Mainboard. It provides validated RF matching, calibrated antenna performance, and full signal access for hardware and firmware co-development.

Does the SLWRB4151A include an onboard antenna?

Yes, the SLWRB4151A integrates a printed Inverted-F Antenna (IFA) tuned to 2.4 GHz with ~50 Ω input impedance. Radiated measurements confirm EIRP of 21.9 dBm at the fundamental frequency. An optional UFL connector allows substitution of the onboard antenna with an external 50 Ω test antenna or spectrum analyzer for conducted RF analysis.

What crystal frequencies are used on the SLWRB4151A?

The SLWRB4151A mounts two crystals: a 32.768 kHz low-frequency crystal (LFXO) for real-time clock and sleep-mode timing, and a 38.4 MHz high-frequency crystal (HFXO) for RF transceiver and CPU clock generation. Both are specified and validated in the BRD4151A Reference Manual Rev. 1.7.

Can the SLWRB4151A operate standalone without the Wireless Starter Kit Mainboard?

No-the SLWRB4151A lacks onboard power regulation, USB interface, display, buttons, or programming circuitry. It requires connection to the Wireless Starter Kit Mainboard (e.g., BRD4001) to receive regulated 3.3 V power, SWD debug access, UART console, and user interaction peripherals. The board-to-board connector provides all necessary control, data, and debug signals.

What EMC standards does the SLWRB4151A comply with?

The SLWRB4151A meets FCC Part 15.247 and ETSI EN 300-328 for the 2.4 GHz band. Conducted and radiated emissions-including 2nd (–47.8 dBm), 3rd (–52.2 dBm), and 4th (–50.4 dBm) harmonics-fall below applied limits. Radiated fundamental EIRP reaches 21.9 dBm, complying with FCC's 30 dBm limit but exceeding ETSI's 20 dBm cap-requiring output power reduction for ETSI certification in final products.

SLWRB4151A Specifications

Product attributes: Attribute value

Manufacturer:: Silicon Labs

Series:: Mighty Gecko

Packaging:: Bulk

Product Status:: Discontinued at Digi-Key

Type:: Transceiver

Frequency:: 2.4GHz

Contents:: Board(s)

Utilized IC / Part:: EFR32MG

SLWRB4151A FAQ

1.How can I place an order for SLWRB4151A through Aetrix?

Please submit a Request for Quotation (RFQ) for SLWRB4151A 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 SLWRB4151A reliable?

The price and inventory of SLWRB4151A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SLWRB4151A is usually 5 days.

3.What payment methods are accepted for SLWRB4151A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SLWRB4151A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SLWRB4151A?

SLWRB4151A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SLWRB4151A 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 SLWRB4151A?

For technical support, including SLWRB4151A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SLWRB4151A requirements.

6.How does Aetrix verify that SLWRB4151A is sourced from the original manufacturer or authorized distributors?

All SLWRB4151A 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 SLWRB4151A meets industry standards.

7.What is the process for return or replacement of SLWRB4151A?

All SLWRB4151A units undergo pre-shipment inspection (PSI). If there is an issue with SLWRB4151A, 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 SLWRB4151A part is unused and in its original packaging.

Return procedure for SLWRB4151A:

1.Submit a request within 90 days.

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

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