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Siemens 3SE5322-0SD21 Safety Limit Switch

Name: 3SE5322-0SD21
Brand: Siemens
SKU: 3SE5322-0SD21
Availability: LimitedAvailability
Author: MRO Marisol

MPN3SE5322-0SD21

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Siemens SIRIUS 3SE5322-0SD21 mechanical safety switch, separate actuator with tumbler, spring-actuated lock (closed-circuit principle), 1300 N locking force, IP66/IP67, screw terminals.

$335.00Ref. price · indicative, final on quote

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Siemens 3SE5322-0SD21 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3SE5322-0SD21 — Identification
Parameter	Value
Product designation	Mechanical safety switches
Product brand name	SIRIUS

3SE5322-0SD21 — Switching & Safety
Parameter	Value
Positive opening function	Yes
Circuit principle	slow-action contacts
Switching function design	positive opening
Safety-related switching contacts	4
Suitable as safety switch	Yes
Safety-related interface connector	without

3SE5322-0SD21 — Mechanical
Parameter	Value
Actuating element design	5 directions of approach
Repeat accuracy	0.05 mm
Mechanical service life (typ. operating cycles)	1 000 000
Enclosure material	plastic
Switch head enclosure material	plastic
Mounting position	any
Fastening method	screw fixing
Length	185 mm
Width	54 mm
Minimum actuating force	30 N
Housing design standard	special design

3SE5322-0SD21 — Environmental
Parameter	Value
IP protection rating	IP66/IP67
Operating temperature range	-25 ... +60 °C
Storage temperature range	-40 ... +80 °C
Shock resistance (IEC 60068-2-27)	30g / 11 ms
Pollution degree	class 3

3SE5322-0SD21 — Wiring
Parameter	Value
Electrical connection type	screw-type terminals
Interface connector design	without
Conductor cross-section, finely stranded (with ferrule)	1x (0.5 ... 1.5 mm²), 2x (0.5 ... 0.75 mm²)
Conductor cross-section, solid	1x (0.5 ... 1.5 mm²), 2x (0.5 ... 0.75 mm²)
Cable entry type	3x (M20 x 1.5)

3SE5322-0SD21 — Electrical
Parameter	Value
Rated insulation voltage	250 V
Thermal current	10 A
Rated impulse withstand voltage	4 kV
Rated current at 24 V	3 A
Rated current at 125 V	0.55 A
DIAZED gG fuse link, continuous current	6 A; for a short-circuit current smaller than 400 A
C-characteristic MCB, continuous current	1 A; for a short-circuit current smaller than 400 A
Quick DIAZED fuse link, continuous current	10 A; for a short-circuit current smaller than 400 A

3SE5322-0SD21 — Specifications
Parameter	Value
According to IEC 60068-2-6	0.35 mm/5g

Product details

Guard door interlock with 1300 N holding force

The Siemens 3SE5322-0SD21 is a SIRIUS mechanical safety switch designed for guard door monitoring where a positive-opening, slow-action contact set must break before the guard opens. Its spring-actuated lock (closed-circuit principle) applies 1300 N holding force to the separate actuator — enough to keep a heavy access gate closed against machine vibration or an operator leaning on it. The lock includes an auxiliary release for emergency override.

Washdown-rated enclosure and wiring

Rated IP66/IP67, the plastic housing survives hose-down cleaning in food or beverage lines. Three M20 cable entries give flexibility for gland placement. Screw terminals accept 1x (0.5…1.5 mm²) or 2x (0.5…0.75 mm²) solid conductors — typical for 14–18 AWG control wiring. The 10 A thermal current rating covers most 24 VDC or 120 VAC safety circuits; at 24 V the contacts are rated 3 A.

Frequently asked questions

Does 3SE5322-0SD21 include an actuator?

Yes. The product design is described as 'with separate actuator and with tumbler'. The actuator is a separate component that mounts on the guard door and engages the switch body.