Siemens HJD62B300 Molded Case Circuit Breaker
- 300A
- 2 Pole
- Unit Mount
Quantity
Siemens HJD62B300 - 300A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Providing high-capacity overcurrent protection, the Siemens HJD62B300 is a 2-pole, 300A MCCB built into a 3-pole JD-Frame housing. It is ideal for heavy-duty industrial networks. This unit-mount breaker installs into Siemens P4 and P5 panelboards, SB switchboards, and legacy Sentron enclosures. It features an interchangeable trip unit, and both line and load lugs are included. It delivers a high 65kAIC rating at 480VAC, utilizing fixed thermal and adjustable magnetic trip settings.Specifications
| Brand | Siemens |
|---|---|
| Series | HJD6 |
| Amperage | 300A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 30kA @ 250VDC |
| Frame Type | JD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4, P5 Panelboards, SB Switchboards, Motor Control Centers, Legacy Sentron Panelboards |
| Wire Gauge | 3/0 AWG - 500 kcmil (Cu), 4/0 AWG - 500 kcmil (Al) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG (Cu), 4/0 AWG (Al) |
| 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 |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Interchangeable Trip Unit, 2-Pole in 3-Pole Housing |
Product FAQs
7 answersWhat types of panelboards and switchboards are compatible with the HJD62B300?
This breaker is designed for use in Siemens P4 and P5 panelboards, SB switchboards, motor control centers, and legacy Sentron panelboards.
What does the H in the HJD62B300 catalog number signify?
The H indicates that this is a High Interrupting rated breaker. It provides a higher interrupting capacity (65kAIC at 480VAC and 35kAIC at 600VAC) compared to standard JD6 frame breakers.
Can the Siemens HJD62B300 be reverse fed?
Yes, standard Siemens thermal magnetic Sentron breakers like the HJD62B300 can typically be reverse fed unless the terminals are specifically marked with LINE and LOAD on the breaker housing.
How is the magnetic trip adjusted on the HJD62B300?
The instantaneous magnetic trip is adjustable via a dial on the front of the breaker. The continuous thermal current rating is fixed at 300 amps.
What is the standard replacement lug kit for the HJD62B300?
The standard aluminum body lug kit for 200A to 400A JD frame breakers is catalog number TA2J6500. This 2-barrel lug accepts 3/0 AWG to 500 kcmil copper or 4/0 AWG to 500 kcmil aluminum wire.
Can the HJD62B300 be used in DC applications?
Yes, this breaker is rated for up to 250VDC with an interrupting capacity of 30kAIC. For 250VDC systems, a two pole breaker is typically used with one pole on each leg of the supply circuit.
Does the HJD62B300 include a push-to-trip feature?
Yes, it features a push-to-trip button on the front of the breaker. This allows you to manually mechanically trip the breaker to verify the tripping mechanism is functioning properly.
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