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Siemens JD63B350 Molded Case Circuit Breaker
- 350A
- 3 Pole
- Unit Mount
Siemens
JD63B350
Molded Case Circuit Breaker
Brand
Siemens
SKU
JD63B350
Quantity
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Siemens JD63B350 - 350A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for robust power distribution, the Siemens JD63B350 is a 3-pole, 350A MCCB from the Sentron JD frame family. It provides reliable long-time and instantaneous (LI) protection for industrial applications. This unit mount breaker installs into Siemens Sentron panelboards, switchboards, and motor control centers. It includes TA2J6500 line and load lugs for immediate wiring. Rated at 65kAIC at 240VAC, it delivers substantial fault interruption. It can substitute for JXD63B350 models.Specifications
| Brand | Siemens |
|---|---|
| Part Number | JD63B350 |
| Series | JD6 |
| Amperage | 350A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | (1-2) 3/0 AWG - 500 kcmil (Cu) or (1-2) 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, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Line and Load Lugs (TA2J6500) Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
Product FAQs
6 answersWhat components are included with the JD63B350 catalog number?
The JD63B350 is supplied as a complete, unassembled breaker. It includes the 400A JD frame (JD63F400), the 350A interchangeable thermal-magnetic trip unit (JD63T350), and standard line and load lugs (TA2J6500).
What wire sizes do the standard TA2J6500 lugs accept?
The included TA2J6500 aluminum 2-barrel lugs accept 3/0 AWG to 500 kcmil copper conductors or 4/0 AWG to 500 kcmil aluminum conductors.
Can the JD63B350 be reverse fed?
No. Because the JD63B350 features an interchangeable trip unit, it does not meet UL 489 requirements for reverse feeding. For reverse feed applications, a non-interchangeable trip breaker like the JXD63B350 must be used.
How is the trip unit adjusted on the JD63B350?
This breaker features a fixed thermal long-time setting at 350 amps and an adjustable magnetic instantaneous setting. The magnetic trip threshold can be adjusted using the dial on the front of the trip unit to coordinate with specific load requirements.
What is the difference between the JD63B350 and JXD63B350 breakers?
The JD63B350 features an interchangeable trip unit, allowing the trip rating to be modified in the field by swapping the unit. The JXD63B350 features a factory-sealed, non-interchangeable trip unit.
Can the Siemens JD63B350 replace older I-T-E JD6 breakers?
Yes. Siemens acquired I-T-E, and the current Sentron JD6 series serves as a direct replacement for legacy I-T-E JD6 frame breakers with matching specifications.
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