Siemens HND63B900 Molded Case Circuit Breaker
- 900A
- 3 Pole
- Unit Mount
Quantity
Siemens HND63B900 - 900A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Siemens HND63B900 molded case circuit breaker is rated 900A with 3 poles, rated voltage of 600VAC, 500VDC, and an interrupting rating of UL 489 65kA at 480VAC. This SENTRON HND6 series breaker features an ND-Frame and LI thermal magnetic trip with fixed thermal and adjustable magnetic settings. It has unit mounting and line and load side lug connections.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HND63B900 |
| Series | HND6 |
| Amperage | 900A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 50kA @ 600VAC |
| Frame Type | ND |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Panelboards and Switchboards |
| Wire Gauge | 250-500 kcmil |
| Max Wire | 500 kcmil |
| Min Wire | 250 kcmil |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Temp Rating | 40C |
|---|
Product FAQs
7 answersWhat current rating should I use when selecting the Siemens HND63B900?
The Siemens HND63B900 has a 900A rated current. Use this rating when coordinating breaker selection with the circuit load and conductor ampacity.
What voltage ratings apply to AC and DC circuits?
The voltage ratings are 600VAC and 500VDC. Select using the rating for the circuit's current type, and check interrupting capacity separately from voltage capability.
How do I check its interrupting rating for a 480VAC installation?
Its UL 489 interrupting rating is 65kA at 480VAC. Compare the available fault current at the installation point with this rating; it must not exceed 65kA when selecting the breaker on this basis.
How does the three-pole construction apply to a three-phase circuit?
This is a three-pole breaker for three-phase circuits. The three poles allow the breaker to interrupt all three phases through one device.
What does the thermal-magnetic trip do?
The thermal element responds to sustained overloads, while the magnetic element responds rapidly to short-circuit current. This combines overload and short-circuit protection in one breaker.
Which trip settings can I adjust?
The thermal trip is fixed, and the magnetic trip is adjustable. Magnetic adjustment lets you tune the short-circuit pickup within the circuit's protection requirements; it does not change the fixed thermal overload response.
What conductor sizes can be terminated at the breaker?
The line- and load-side lugs accept conductors from 250-500 MCM. Choose conductor sizes that satisfy circuit ampacity requirements while remaining within this termination range.
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