Technical Specification Confirmation
PROCUREMENT & SUPPLY DECISION RECORD
Ref: ACG-SPEC-MQELCIDA  ·  Generated: 15 Jun 2026
ACG AgaCanGroup
sales@agacaninvestment.com
agacangroup.com
Siemens SIRIUS ACT 2-position Key Switch Head, Latching, 22mm Cutout
Siemens
Siemens SIRIUS ACT 2-position Key Switch Head, Latching, 22mm Cutout
Part No.
3SU1050-4FF21-0AA0
Procurement Intelligence
The SIRIUS ACT is Siemens' modular control switch series designed for panel-mount applications requiring secure key-operated access control. This 2-position latching switch head features a 22mm cutout and 90° throw angle, suitable for harsh environments up to IP69K rating. Critical verification: confirm key type 73037 compatibility and that panel cutout diameter precisely matches 22mm specification.
Industrial panel access control
Before ordering — verify:
☐ Key type 73037 availability
☐ Panel cutout tolerance 22mm
☐ IP rating environment match
Technical Specifications
SeriesSIRIUS ACT
Cutout Diameter22mm
Number of Positions2
Key Type73037
Key Withdrawal PositionI
Switch ActuationLatching
IP RatingIP66, IP67, IP69(IP69K)
Angle of Throw90°
Number Of Keys2
Maximum Operating Temperature+70°C
Mechanical Life300000
Minimum Operating Temperature-25°C
ACG Industrial & Infrastructure Solutions
Kampala, Uganda  ·  Malatya, Turkey
http://agacangroup.com/product/electrical-items/switches/key-switches-selector-switches/key-switch-heads/siemens-sirius-act-2-position-key-switch-head-latching-22mm-cutout?mal=6617b6f33db68cec45def46e
This document confirms the above specification is available in the ACG Industrial catalogue. Pricing and availability on request. Forward to your procurement team to initiate an RFQ.