SFM super-low profile safety relay
Miniaturization for all safety applications
With a height of only 7.8mm, SFM is the world’s lowest profile relay with forcibly-guided contacts according to EN 61810-3. In addition, the 1a1b relay is available as a reflow (THR) version, contributing to a simplified and cost-efficient production process. SFM series can be used to miniaturize all kinds of safety applications, from railway signaling boards with a focus on low level loads to high power safety relays or safety controls.
Key Features
- 1NO/1NC relay with forcibly-guided contacts according to EN 61810-3
- Extremely low height of 7.8mm
- Rating 6A (NO), 4A (NC) @ 250VAC, 30VDC
- 100mW coil holding power
- High shock resistance >20g
- THT & THR types available
- Reinforced insulation ≥ 5.5mm (V=230V over-voltage category III, 6kV) on NO side
- Coil voltage from 3 to 24V
- Ambient temperature -40 to +85°C
Industrial automation
- Safety relay modules
- Safety controllers
- Safe motion control
Building automation
- Elevator control
- Escalator control
- Access control
Transportation
- Railway signaling
- For applications outside the train
- Station access control
Downloads
| Name | Size | Date | Language |
|---|---|---|---|
| Relay Soldering and Cleaning Guidelines | 73 KB | 17.08.2025 | English |
| General Application Guidelines | 406 KB | 17.08.2025 | English |
| Reliability | 55 KB | 17.08.2025 | English |
| Definition of Relay Terminology | 151 KB | 17.08.2025 | English |
| Applications of Relays in Electronic Circuits | 134 KB | 17.08.2025 | English |
| SF-M Relays, 2D CAD(DXF) | 115 KB | 02.06.2025 | English |
| SF-M Relays, 3D CAD(IGES) | 339 KB | 02.06.2025 | English |
| SF-M Relays, 3D CAD(Parasolid) | 194 KB | 02.06.2025 | English |
| SF-M Relays, 3D CAD(View) | 38 KB | 02.06.2025 | English |
| SF-M Relays, 2D CAD(DXF) | 114 KB | 02.06.2025 | English |
| SF-M Relays, 3D CAD(IGES) | 339 KB | 02.06.2025 | English |
| SF-M Relays, 3D CAD(Parasolid) | 194 KB | 02.06.2025 | English |
| SF-M Relays, 3D CAD(View) | 38 KB | 02.06.2025 | English |
CAD
| Name | Size | Date | Language |
|---|---|---|---|
| SF-M Relays, 3D CAD(STEP) | 332 KB | 02.06.2025 | English |
| SF-M Relays, 3D CAD(STEP) | 332 KB | 02.06.2025 | English |
Catalog
| Name | Size | Date | Language |
|---|---|---|---|
| Relay match list old-new part numbers | 126 KB | 03.07.2023 | Englilsh |
Data sheet
| Name | Size | Date | Language |
|---|---|---|---|
| SF-M Relays Datasheet (Safety Relays) | 218 KB | 17.08.2025 | English |
| Mechanical Relays Selection Guide (Signal Relays (2A or less), Power Relays (Over 2A), Safety Relays, Microwave Devices, High-capacity DC Cutoff Relays) | 4 MB | 17.08.2025 | English |
| Proposal for Establishing Machinery Safety Using Safety Relays (Safety Relays) | 6 MB | 17.08.2025 | English |
Flyer
| Name | Size | Date | Language |
|---|---|---|---|
| Fighting card SFM relay | 321 KB | 09.03.2023 | English |
