The Siemens 5ST30100HG is a genuine SENTRON auxiliary switch designed for UL 489 miniature circuit breakers (MCBs). Featuring 1 Normally Open (1NO) and 1 Normally Closed (1NC) contact, this auxiliary contact provides reliable remote indication of the ON/OFF switching status of compatible circuit breakers. It is ideal for integrating electrical protection devices with PLCs, SCADA systems, building management systems (BMS), and other industrial monitoring applications.
The 5ST30100HG is side-mounted and can be easily installed on compatible Siemens UL 489 miniature circuit breakers without requiring major panel modifications. It changes state simultaneously with the breaker contacts during manual switching and automatic tripping, making it suitable for remote signaling, status indication, and control applications. The compact design saves valuable DIN rail space while maintaining high operational reliability.
Manufactured to Siemens' stringent quality standards, the 5ST30100HG offers excellent mechanical durability, dependable switching performance, and long service life. With IP20 protection, an insulation voltage of 440V, and compliance with international standards, it is an ideal accessory for industrial control panels, commercial distribution boards, and OEM electrical equipment.
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Part Number | 5ST30100HG |
| Product Series | SENTRON 5ST3 |
| Product Type | Auxiliary Switch |
| Contact Configuration | 1 NO + 1 NC |
| Function | Remote ON/OFF Status Indication |
| Compatible Devices | UL 489 Miniature Circuit Breakers |
| Mounting Type | Side Mounted |
| Rated Insulation Voltage (Ui) | 440 V |
| Rated Impulse Withstand Voltage (Uimp) | 4 kV |
| Operating Voltage | Up to 480 V AC/DC |
| Control Voltage Type | AC/DC |
| Electrical Endurance | Approx. 6,000 Operating Cycles |
| Degree of Protection | IP20 |
| Conductor Size | 0.5–2.5 mm² (AWG 24–12) |
| Standards | UL 489, IEC Compliant |
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