SFM10R2 - SIGFOX RCZ2 SMD Module 13x20mm | Wisol
MPN: SFM10R2 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.95 | $9.95 |
| 10 | $8.95 | $89.50 |
| 100 | $7.5 | $750.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.1 | $5,100.00 |
SFM10R2 Overview
What is a SIGFOX module? A SIGFOX module is a pre-certified radio transceiver subsystem that implements the physical and link layers of the Sigfox LPWAN protocol. These modules combine an RF front-end, baseband processor, and (often) an integrated MCU, and are pre-certified under FCC/IC for end-device deployment, so the integrator does not need to design a radio from scratch. SIGFOX modules are widely used for low-throughput IoT applications such as utility metering, asset tracking, agriculture sensors, and alarm panels where multi-year battery life and low module cost dominate over data rate.
Key features of the SFM10R2 include its compact SMD footprint enabling integration onto small sensor PCBs, an FCC ID of 2AS8LSFM10R2 and IC certification number 25119-SFM10R2 that lets the OEM inherit radio compliance, and ultra-low-power operation suitable for coin-cell or primary-battery powered endpoints. The module exposes a UART for AT-command style configuration and offers a temperature sensor for environmental reporting.
Technically, the SFM10R2 is built around the ON Semi AX-SFUS-1-01 SoC, which integrates the Sigfox modem firmware and ARM-class processing core. This eliminates the need for an external host MCU to manage the radio, although a companion MCU is still useful for application logic and sensor I/O. UART lines serve as the host interface.
Typical applications include Sigfox asset tracking sensors, utility meter concentrators, smart agriculture probes, industrial tank-level monitors, and wireless alarm panels. The integrated temperature sensor and Sigfox uplink make the SFM10R2 a near drop-in solution for cold-chain and remote telemetry.
When designing with the SFM10R2, ensure the host PCB respects the antenna keep-out region and that the UART logic levels match the host MCU. The module is a sub-GHz radio, so a tuned trace or chip antenna footprint must be co-designed per the WSSFM10R2 datasheet.
This page synthesizes distributor pricing, drop-in alternatives, and FCC/IC certification context not found in the manufacturer datasheet alone, helping engineers evaluate the SFM10R2 against modern Sigfox and LPWAN module choices.
Drop-in alternatives for SFM10R2 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SFM10R1
✅ Drop-In📋 Reference alternative (not in catalog)
WSSFM10R2
✅ Drop-In📋 Reference alternative (not in catalog)
AX-SFUS-1-01
✅ Drop-In📋 Reference alternative (not in catalog)
SFM10R2 Specifications (manufacturer-published)
| Module Type | SIGFOX-only radio module (SMD PCBA) |
| Sigfox Radio Zone | RCZ2 (North America, 902-928 MHz) |
| Dimensions | 13.0 x 20.0 x 2.21 mm |
| Chipset | ON Semiconductor AX-SFUS-1-01 |
| Integrated MCU | Yes (inside AX-SFUS-1-01) |
| Host Interface | UART |
| RF Connector / Antenna | External antenna via RF trace/pad (per datasheet) |
| Operating Mode | Transmit and Receive (Sigfox) |
| Integrated Temperature Sensor | Yes |
| FCC Identifier | 2AS8LSFM10R2 |
| IC Certification Number | 25119-SFM10R2 |
| Sigfox Verified | Yes |
| Mounting Type | Surface Mount (SMD PCBA) |
SFM10R2 Interfaces & Connectors
No manufacturer-published interface list is available for SFM10R2. Refer to the manufacturer documentation for connector and header details.
Refer to the manufacturer documentation for the full expansion header pinout and connector pin numbering.
Typical Applications
SFM10R2 is suitable for 6 applications: Sigfox Asset Tracking Sensor, Utility Meter Concentrator, Smart Agriculture Probe, Industrial Tank Level Monitor, Wireless Alarm Panel, Cold-Chain Temperature Logger.
Sigfox Asset Tracking Sensor
The SFM10R2 fits asset tracking because its Sigfox RCZ2 uplink covers 902-928 MHz across North America with no cellular contract required. Its 13x20mm SMD PCBA lets designers place the radio on the same PCB as the accelerometer and battery, and the integrated temperature sensor adds a free environmental channel. The UART host interface keeps the host MCU firmware simple, and the FCC/IC certifications (2AS8LSFM10R2 / 25119-SFM10R2) let OEMs ship to the US/Canada without re-testing the radio.
Recommended
Utility Meter Concentrator
Water, gas, and electric meters that need a 5-10 year battery life benefit from the SFM10R2's ultra-low sleep current and short Sigfox TX bursts. Because Sigfox uplink messages are limited to 12 bytes per frame, the SFM10R2 is ideal for the small daily readouts that meter concentrators transmit. The Wisol module's pre-certified radio saves the meter OEM from RF re-design, and its 13x20mm footprint fits inside the meter enclosure alongside the sensor conditioning chain.
Recommended
Smart Agriculture Probe
Soil moisture, leaf wetness, and weather stations in remote fields rely on LPWAN backhaul, and the SFM10R2 brings Sigfox coverage to North American deployments. The integrated temperature sensor eliminates an external component, lowering BOM cost for mass-deployed probes. The SMD PCBA reflows onto the probe's main PCB, and the UART lets the probe MCU drive the radio via simple AT commands. With Sigfox duty-cycle rules, the probe battery can last multiple growing seasons.
Recommended
Industrial Tank Level Monitor
Chemical and fuel tanks at remote industrial sites need reliable low-data uplink, and the SFM10R2's Sigfox RCZ2 link supports periodic level reports without GSM contracts. The SMD form factor mounts directly to the tank sensor board, and the pre-certified FCC ID 2AS8LSFM10R2 simplifies hazardous-location approvals. The module's UART host interface keeps the sensor MCU code lean, leaving headroom for the level measurement algorithm.
Recommended
Wireless Alarm Panel
Security alarm panels with battery backup benefit from the SFM10R2's low-power Sigfox uplink and integrated temperature sensor. The module's SMD PCBA integrates onto the alarm main board, and the UART host interface ties into the panel MCU for event reporting. Pre-certified FCC/IC lets alarm OEMs avoid a costly radio re-test cycle, and Sigfox coverage in North America is sufficient for most residential and light commercial installations.
Recommended
Cold-Chain Temperature Logger
Refrigerated transport and pharmaceutical cold-chain loggers transmit temperature samples over Sigfox using the SFM10R2's integrated temperature sensor and low-power RCZ2 uplink. The 13x20mm SMD footprint fits inside small logger enclosures alongside the primary lithium cell. Because Sigfox uplink frames are short (12 bytes), the module's TX duty is minimal and battery life can exceed multi-year transit use cases.
Recommended
Recommended Products Summary
Engineering reference data for SFM10R2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SFM10R1 | WSSFM10R2 | AX-SFUS-1-01 |
|---|---|---|---|---|
| Package | SMD PCBA 13x20mm | SMD PCBA 13x20mm - same | SMD PCBA 13x20mm - same | SMD Module (bare SiP) |
| Brand | Wisol | Wisol | Wisol | onsemi |
| Sigfox Radio Zone | RCZ2 (902-928 MHz, North America) | RCZ1 (868 MHz, Europe) | RCZ2 (902-928 MHz, North America) | Configurable |
| Chipset | ON Semi AX-SFUS-1-01 | ON Semi AX-SFUS-1-01 | ON Semi AX-SFUS-1-01 | ON Semi AX-SFUS-1-01 (bare) |
| Host Interface | UART | UART | UART | UART/SPI |
| Integrated MCU | Yes | Yes | Yes | Yes |
| Integrated Temperature Sensor | Yes | Yes | Yes | Yes |
| FCC Certification | 2AS8LSFM10R2 | Different FCC ID (RCZ1) | Same family | None (bare chipset, integrator certifies) |
| Form Factor | SMD module 13x20x2.21 mm | SMD module 13x20x2.21 mm | SMD module 13x20x2.21 mm | Bare SiP, smaller |
Key Differentiators
- Pre-certified FCC/IC under SFM10R2 SKU (vs AX-SFUS-1-01 (bare chipset))
- Same SMD footprint across RCZ1 / RCZ2 / Sigfox Partner variants (vs SFM10R1 (RCZ1))
- Integrated temperature sensor reduces BOM (vs SFM10R1 (no integrated sensor differentiation))
Design Notes
Do not assume the SFM10R2 can be used in Europe or Asia without re-certification - the module is certified only for RCZ2 (902-928 MHz, FCC 2AS8LSFM10R2 / IC 25119-SFM10R2). For European deployments, use the SFM10R1 (RCZ1) variant. Operating the SFM10R2 outside its certified band violates FCC rules and may violate local spectrum regulations.
Reserve the antenna keep-out region on the host PCB exactly as shown in the WSSFM10R2 user manual. Any copper or components in the antenna's near field detunes the chip antenna and degrades TX/RX range. Place a solid ground pour around the module for thermal spreading and noise immunity, but keep the keep-out area clear.
Estimated: at 3.3V VCC, a typical Sigfox TX burst draws 30-50 mA for ~10 ms every few minutes. Decouple VCC with a 10 uF bulk plus 100 nF ceramic close to the module pin, and verify the source can sustain the burst without sag. Add a reverse-polarity and ESD protection diode at the host power input to protect the UART lines.
Estimated: the UART lines from the SFM10R2 are 3.3V logic. If the host MCU runs at 1.8V or 5V, insert a level translator; do not rely on internal ESD diodes. Keep UART traces short and route them away from the antenna region to avoid capacitive coupling that can degrade range.
The SFM10R2 is a pre-certified RF module, so the host PCB layout is simplified - follow the reference layout in the WSSFM10R2 datasheet. Use a 50 ohm microstrip or coplanar waveguide for any external antenna feed, and confirm antenna return loss with a VNA before declaring the design production-ready.
Compliance Information
FCC ID 2AS8LSFM10R2 and IC 25119-SFM10R2 are completed per the FCC user manual. RoHS / REACH / lead-free / halogen-free data was not present in the verified sources and is reported as 'unknown' until confirmed against the Wisol material declaration.
