Siemens CLMSB10120 Lighting Contactor
The CLMSB10120 is a Siemens Class CLM mechanically held, electrically operated lighting contactor designed for chassis mounting in industrial control enclosures. All contacts are normally open; the coil consumes 600 VA during pull-in and holds on a reduced power setting once engaged.
Contact Arrangement
| Parameter | Specification |
|---|---|
| Contact Form | 10PST-NO (10 Form A) |
| Contact Rating | 20 A |
| Coil Voltage | 110 ~ 120 VAC |
| Coil Power | 600 VA |
| Mounting | Chassis Mount |
| Encapsulation | Box |
| Features | Auxiliary Contacts |
| RoHS | Non-compliant |
| Status | Active |
The ten normally-open poles suit multi-circuit lighting banks, signage arrays, or feeder distribution where coordinated switching of multiple loads from a single command signal is required.
Mechanical Held Operation
Mechanically held contactors latch in their last state after a momentary coil pulse, drawing holding power only during transition. This reduces continuous coil heat load versus magnetically held types and maintains position through brief power interruptions.
The CLMSB prefix places this unit in Siemens' Class CLM series for commercial and light-industrial lighting control applications.
Comparison with Alternate CLMSB Units
The reader must qualify any listed alternate independently; similarity scores reflect parametric proximity only and do not indicate interchangeability or equivalence.
| MPN | Poles | Coil Voltage | Encapsulation |
|---|---|---|---|
| CLMSB10120 | 10 NO | 110~120 VAC | Box |
| CLMSB10208 | 10 NO | 208~240 VAC | Bulk |
| CLMSB10240 | 10 NO | 208~240 VAC | Bulk |
| CLMSB10277 | 10 NO | 265~277 VAC | Bulk |
| CLMSB12120 | 12 NO | 110~120 VAC | Box |
| CLMSB12240 | 12 NO | 208~240 VAC | Bulk |
| CLMSB12208 | 12 NO | 208~240 VAC | Bulk |
| CLMSB04120 | 4 NO | 110~120 VAC | Box |
| CLMSB06120 | 6 NO | 110~120 VAC | Box |
All alternates share: 20 A contact rating, 600 VA coil power, chassis mount, auxiliary contacts, and Active status.
- CLMSB10208, CLMSB10240, CLMSB10277 share the 10-pole configuration with higher AC coil voltages (208-277 V range) and bulk packaging.
- CLMSB12120, CLMSB12240, CLMSB12208 add two poles for 12-NO configurations while matching 120 V or 208-240 V coils.
- CLMSB04120 and CLMSB06120 reduce to 4 or 6 poles at 120 V for smaller lighting zones.