Siemens HNXD63B900 Molded Case Circuit Breaker
- 900A
- 3 Pole
- Bolt-On
Quantity
Siemens HNXD63B900 - 900A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for circuit protection, the Siemens HNXD63B900 molded case circuit breaker is rated for 900A, 600VAC and 500VDC with 3 poles and 3-phase operation. This SENTRON HNXD6 series breaker has an ND frame and bolt-on mounting and terminal connections. It provides 65kAIC interrupting capacity at 480V. Thermal magnetic tripping combines fixed thermal and adjustable magnetic settings with long-time and instantaneous protection. It meets RoHS and REACh standards.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HNXD63B900 |
| Series | HNXD6 |
| Amperage | 900A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 50kA @ 600VAC, 50kA @ 500VDC |
| Frame Type | ND |
|---|---|
| Terminal Type | Bolt-On |
| For Use With | Siemens Switchboards and Enclosures |
| 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 answersHow should I use the 900A rating when selecting the Siemens HNXD63B900?
Use the 900A rated current when coordinating the breaker with the circuit load and conductor protection requirements. Current rating and interrupting rating serve different purposes, so evaluate both during selection.
How does the 65kAIC at 480V rating guide fault-current selection?
For a 480V application, compare the available fault current at the installation point with the 65kAIC interrupting rating. The available fault current must not exceed that rating.
What does the 3-pole, 3-phase configuration mean for circuit selection?
The 3-pole configuration provides a breaker pole for each phase of a 3-phase circuit. Use this configuration when selecting protection for the circuit's phase conductors.
How does the thermal-magnetic trip protect the circuit?
The thermal-magnetic trip combines long-time protection for sustained overloads with instantaneous response to high fault currents. This addresses both prolonged overcurrent and faults requiring rapid interruption.
Which trip settings can I adjust?
The thermal trip is fixed, while the magnetic trip is adjustable. Use the magnetic adjustment when coordinating instantaneous response with circuit starting currents and fault-protection requirements.
What should I plan for when mounting and connecting this breaker?
Plan for bolt-on mounting and bolt-on terminal connections. Installation involves both a bolted mechanical attachment and bolted electrical joints, with secure joints essential to maintaining reliable contact under load.
How do the AC and DC voltage ratings guide selection?
The 600VAC and 500VDC ratings are voltage limits for AC and DC applications, respectively. Compare the circuit voltage with the rating for its supply type.
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