Siemens HQS2100H Molded Case Circuit Breaker
- 100A
- 2 Pole
- Plug-On
Quantity
Siemens HQS2100H - 100A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Serving as a dedicated tenant main, this 100-amp QS frame circuit breaker provides robust power distribution for multi-family residential and commercial metering. It mounts securely into Siemens Power Mod and Murray meter stacks, acting as a modern substitute for discontinued MDH2100 models. Rated for an extra-high 100kAIC at 120/240VAC, the unit utilizes a side-wired design to simplify tight enclosure wiring. Fixed thermal-magnetic elements ensure reliable long-time and instantaneous tripping.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HQS2100H |
| Series | HQS |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 100kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Power Mod Meter Stacks, Murray Meter Stacks |
| Wire Gauge | 3 AWG - 300 kcmil (Cu/Al) |
| Max Wire | 300 kcmil |
| Min Wire | 3 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Extra High Interrupting Capacity, Non-Interchangeable Trip, HACR Rated |
Product FAQs
7 answersWhat type of enclosures accept the HQS2100H circuit breaker?
This breaker is specifically designed for use as a tenant main disconnect in Siemens Power Mod and Murray modular meter stacks. It is not intended for standard residential load centers.
What does the 100kAIC rating mean for the HQS2100H?
The 100,000 Amps Interrupting Capacity (100kAIC) indicates the maximum fault current the breaker can safely clear at 240V. This high rating is often required in commercial or multi-family metering centers located close to large utility transformers.
What is the difference between Siemens QS, QSH, and HQS breakers?
While they share the same physical QS frame and plug-in mounting, their short-circuit interrupting ratings differ. The standard QS is rated at 10kAIC, the QSH at 22kAIC, and the HQS series provides a 100kAIC rating for high fault-current applications.
How does the HQS2100H mount into the meter stack?
It utilizes a plug-in connection that snaps directly onto the meter stack bus. This modular design allows for quick installation and replacement of tenant main breakers without requiring bolted bus connections.
Does the HQS2100H provide arc-fault or ground-fault protection?
No. It is a standard thermal-magnetic breaker equipped with Long-Time and Instantaneous (LI) trip functions for overload and short-circuit protection. It does not contain AFCI or GFCI circuitry.
Can this breaker be used in legacy Murray meter stacks?
Yes, the HQS2100H is UL listed for use in compatible Murray meter stacks, as Siemens acquired Murray and integrated their modular metering product lines.
What wire types are compatible with the HQS2100H lugs?
The factory-installed lugs are rated for both copper (Cu) and aluminum (Al) conductors, accepting wire sizes from 3 AWG up to 300 kcmil. Always apply an approved joint compound or oxide inhibitor when terminating aluminum wiring to prevent corrosion.
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