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Siemens HFXD63B070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Siemens
HFXD63B070
Molded Case Circuit Breaker
Brand
Siemens
SKU
HFXD63B070
Quantity
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Siemens HFXD63B070 - 70A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial and industrial applications, the Siemens HFXD63B070 is a 70A, 3-pole molded case circuit breaker from the Sentron FD frame series. It provides reliable thermal-magnetic protection for demanding electrical systems. This bolt-on MCCB is designed to install into Siemens P2, P3, S4, and S5 panelboards. It features a feed-thru connection design supplied without lugs. Rated for high interrupting capacity, it delivers 65kAIC at 480VAC and is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Series | HFXD6 |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | FD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P2, P3, S4, S5 Panelboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Padlock Attachment |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Reverse Feed, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
6 answersWhat panelboards are compatible with the HFXD63B070?
This Sentron FD-frame breaker is designed for installation in Siemens P2, P3, S4, and S5 series panelboards.
What is the standard lug kit for this 70A FD-frame breaker?
The standard lug kit for Siemens 70A to 250A FD-frame breakers is the TA1FD350A. It accepts 6 AWG to 350 kcmil copper or 4 AWG to 350 kcmil aluminum conductors.
What is the difference between the FXD63B070 and the HFXD63B070?
The H prefix designates the high-interrupting capacity version of the Sentron FD-frame. The HFXD63B070 provides a higher short-circuit interrupting rating than the standard FXD63B070, making it suitable for distribution systems with higher available fault currents.
How should this 3-pole breaker be wired for 500VDC applications?
When applying this breaker on 500V ungrounded DC systems, Siemens requires connecting the power supply in a series zig-zag configuration across all three poles. This ensures proper arc interruption and safely utilizes the DC voltage rating.
How is the trip unit configured on the HFXD63B070?
This breaker features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element. The magnetic dial on the front allows you to fine-tune the instantaneous short-circuit response to prevent nuisance tripping during high inrush currents.
Can I install this FD-frame breaker in a space designed for an ED-frame?
No. The FD-frame is physically larger and designed for higher-capacity feeder applications than the ED-frame. They require different mounting hardware, strap kits, and panelboard spacing.
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