Omron D4BS-25FS — Safety Door Switch, 2NC
SKU: D4BS-25FSUSD 26.50
Hinge-mount safety door switch, 2NC slow-action contacts, 1300 N holding force, M20 conduit, IP67, -40 to +80 °C, certified direct opening.
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Product Overview
The Omron D4BS-25FS is a hinge-mount safety door switch with 2NC slow-action contacts and certified direct opening. It is manufactured by Omron Corporation. Hengyixin Automation stocks this safety device in Xiamen and ships within 3-5 business days; safety-rated components ship with a batch-trace certificate.
Single M20 conduit entry Operating temperature -40 to +80 °C
Single M20 conduit entry Operating temperature -40 to +80 °C Single M20 conduit entry Operating temperature -40 to +80 °C
Operating temperature is -40 to +80 °C — wider than most safety switches, which makes the D4BS a good fit for outdoor cabinets and cold-storage rooms.
Key Features
- Single M20 conduit entry
- Operating temperature -40 to +80 °C
- Hinge-mount safety door switch, 2NC slow-action contacts
- IP67 sealing for water and oil environments
- SKU: D4BS-25FS
- Series: D4BS hinge-mount safety door switch
- Voltage: 400 VAC
Best-Fit Applications
- Maintenance door on a hydraulic press that interlocks with the press-stroke safety circuit
- Outdoor cabinet door on a pump skid where -40 °C winter ratings matter
- Hatch on a conveyor turntable where the operator opens it to clear a jam
Buying Checklist
- Pick the M12 connectorised D4BS-25FS-R variant if you want a quick-disconnect cable instead of a conduit.
- Choose D4BS-25FS for a 2NC hinge-mount safety door switch with 1,300 N holding force; pick D4BS-15FS if you need 1NC/1NO instead.
- Use the direct-opening NC contact in the safety circuit (not the NO contact) — the NO does not have direct-opening certification.
Technical Specifications
| Model | D4BS-25FS |
|---|---|
| Series | D4BS hinge-mount safety door switch |
| Contact Form | 2NC slow-action |
| Direct Opening | Yes (certified on NC contacts, EN ISO 14119) |
| Holding Force | 1,300 N minimum |
| Conduit Entry | Single, M20 |
| Rated Voltage | 400 VAC max |
| Rated Current | 10 A (AC-15 inductive) |
| Operating Temperature | -40 to +80 °C |
| Mechanical Operations | ≥ 1,000,000 minimum |
| Protection Rating | IP67 (EN 60947-5-1) |
| Operating Key | Sold separately (D4BS-K series) |
| Approvals | TÜV (EN), UL, CSA |
FAQ for D4BS-25FS
What is the difference between D4BS-25FS and D4BS-15FS?
D4BS-25FS is 2NC (two normally-closed contacts) and D4BS-15FS is 1NC/1NO (one NC and one NO). Pick 2NC for a category-3 or 4 safety circuit where the safety controller reads both NCs; pick 1NC/1NO when you also need a non-safety door-position signal for a PLC.
Does the D4BS-25FS need an operating key?
Yes. The D4BS-25FS ships without an operating key. You must order a D4BS-K key separately, sized to match the door swing direction (top, side, or bottom insertion). Without the key, the switch contacts stay open and the door is not detected as closed.
What is the holding force of the D4BS-25FS?
1,300 N minimum per the Omron datasheet. That is well above the EN ISO 14119 minimum of 1,000 N for category-3 and category-4 safety circuits, so the switch stays latched under vibration and minor door bounce.
Is the D4BS-25FS IP67 rated?
Yes — the switch body is IP67 per EN 60947-5-1, which protects against water jets and oil ingress. The operating key insertion slot must be kept clean so the key seats fully and the contacts close reliably.
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