Siemens HHJXD63B400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Bolt-On
Quantity
Siemens HHJXD63B400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Operating within the Sentron family, this 400-amp, three-pole molded case circuit breaker features a non-interchangeable thermal-magnetic trip unit. It provides essential long-time and adjustable instantaneous (LI) protection for commercial and industrial facilities. Designed as a bolt-on component, it mounts into Siemens Sentron panelboards, switchboards, and enclosures.Specifications
| Brand | Siemens |
|---|---|
| Series | HHJXD |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC |
| Frame Type | JD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, Enclosures |
| 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, Padlock Attachment, Motor Operator, Rotary Handle, Lug Kits |
|---|---|
| Accessories | Lugs not included |
| Standards | HACR, IEC 60947-2, RoHS, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Current Limiting, Extra High Interrupting Capacity, Non-Interchangeable Trip, Reverse Feed |
Product FAQs
7 answersWhich panelboards and enclosures are compatible with the HHJXD63B400?
This JD frame breaker is designed for installation in Siemens Sentron panelboards, switchboards, and compatible standalone enclosures.
What does the HH prefix in the HHJXD63B400 catalog number indicate?
In the Siemens Sentron series, the HH prefix designates an extra-high interrupting capacity. This model provides up to 100kAIC at 480VAC and 50kAIC at 600VAC, exceeding the ratings of standard JXD and high-interrupting HJXD versions.
Is the trip unit on the HHJXD63B400 adjustable?
Yes, it features a thermal magnetic trip unit with fixed thermal protection for overloads and an adjustable magnetic setting for instantaneous short-circuit protection.
Can the HHJXD63B400 replace standard JXD63B400 or HJXD63B400 breakers?
Yes. Because they share the same physical JD frame dimensions, the HHJXD63B400 can directly replace standard JXD63B400 or high-interrupting HJXD63B400 models, providing a higher short-circuit rating for the same footprint.
Which lug kits are compatible with the HHJXD63B400?
If your installation requires lugs, this JD frame breaker accepts Siemens lug kits such as the TA2J6500 for dual-rated aluminum or the TC2J6500 for copper. Both kits accommodate wire sizes from 3/0 AWG to 500 kcmil.
Can the HHJXD63B400 be applied on 240V or 480V systems?
Yes. While it has a maximum voltage rating of 600VAC, it is fully rated for 240VAC and 480VAC systems. The interrupting capacity increases at lower voltages, delivering up to 200kAIC at 240VAC and 100kAIC at 480VAC.
Are the trip units on the HHJXD63B400 interchangeable?
No. The X in the HHJXD catalog number indicates that the breaker features a factory-assembled, non-interchangeable trip unit.
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