• Siemens SIRIUS 3SK1 Standard Safety Relays (3SK1111, 3SK1112)
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Siemens SIRIUS 3SK1 Standard Safety Relays (3SK1111, 3SK1112)

Siemens SIRIUS 3SK1 Standard Safety Relays (3SK1111, 3SK1112)

SIRIUS 3SK1 Standard basic safety relays for simple safety functions with few sensors and a small number of safe outputs.

Key features

  • Up to SIL 3 (IEC 62061) and PL e (ISO 13849-1)
  • Relay outputs (3SK1111) or semiconductor outputs (3SK1112)
  • Parameterization via DIP switches, no software required
  • Expandable by wiring with 3SK121 output expansions or 3RQ1 coupling relays
  • Version with protective coating on the printed circuit board available
  • Screw or spring-loaded (push-in) terminals

Specifications

Brand Siemens
Product line SIRIUS 3SK1 Standard
Device connectors Not possible
Ambient temperature -25 ... +60 °C
Degree of protection IP20
Safety level SIL 3 / PL e
Approvals UL, TÜV
Mounting 35 mm DIN rail
Source Siemens Catalog IC 10 · 2026, p. 1053-1055
3SK1111-1AB30 Type: 3SK1111 Standard | Supply: 24 V AC/DC | Outputs: 3 NO + 1 NC signaling (relay) | PCB coating: No | Connection: Screw
3SK1111-2AB30 Type: 3SK1111 Standard | Supply: 24 V AC/DC | Outputs: 3 NO + 1 NC signaling (relay) | PCB coating: No | Connection: Spring-loaded (push-in)
3SK1111-2AB30-0AX0 Type: 3SK1111 Standard | Supply: 24 V AC/DC | Outputs: 3 NO + 1 NC signaling (relay) | PCB coating: Yes | Connection: Spring-loaded (push-in)
3SK1111-1AW20 Type: 3SK1111 Standard | Supply: 110-240 V AC/DC | Outputs: 3 NO + 1 NC signaling (relay) | PCB coating: No | Connection: Screw
3SK1111-2AW20 Type: 3SK1111 Standard | Supply: 110-240 V AC/DC | Outputs: 3 NO + 1 NC signaling (relay) | PCB coating: No | Connection: Spring-loaded (push-in)
3SK1112-1BB40 Type: 3SK1112 Standard | Supply: 24 V DC | Outputs: 2 safety + 1 signaling (semicond.) | PCB coating: No | Connection: Screw
3SK1112-2BB40 Type: 3SK1112 Standard | Supply: 24 V DC | Outputs: 2 safety + 1 signaling (semicond.) | PCB coating: No | Connection: Spring-loaded (push-in)
Safety RelaysSiemens
7 product codes available in this family
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Siemens SIRIUS 3SK1 Standard Safety Relays (3SK1111, 3SK1112)

Brand Siemens·Safety Relays

Available part numbers (7)

3SK1111-1AB30, 3SK1111-2AB30, 3SK1111-2AB30-0AX0, 3SK1111-1AW20, 3SK1111-2AW20, 3SK1112-1BB40, 3SK1112-2BB40

How to order

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Product codeSpec
3SK1111-1AB30Type: 3SK1111 Standard | Supply: 24 V AC/DC | Outputs: 3 NO + 1 NC signaling (relay) | PCB coating: No | Connection: Screw
3SK1111-2AB30Type: 3SK1111 Standard | Supply: 24 V AC/DC | Outputs: 3 NO + 1 NC signaling (relay) | PCB coating: No | Connection: Spring-loaded (push-in)
3SK1111-2AB30-0AX0Type: 3SK1111 Standard | Supply: 24 V AC/DC | Outputs: 3 NO + 1 NC signaling (relay) | PCB coating: Yes | Connection: Spring-loaded (push-in)
3SK1111-1AW20Type: 3SK1111 Standard | Supply: 110-240 V AC/DC | Outputs: 3 NO + 1 NC signaling (relay) | PCB coating: No | Connection: Screw
3SK1111-2AW20Type: 3SK1111 Standard | Supply: 110-240 V AC/DC | Outputs: 3 NO + 1 NC signaling (relay) | PCB coating: No | Connection: Spring-loaded (push-in)
3SK1112-1BB40Type: 3SK1112 Standard | Supply: 24 V DC | Outputs: 2 safety + 1 signaling (semicond.) | PCB coating: No | Connection: Screw
3SK1112-2BB40Type: 3SK1112 Standard | Supply: 24 V DC | Outputs: 2 safety + 1 signaling (semicond.) | PCB coating: No | Connection: Spring-loaded (push-in)

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