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Siemens JD63B225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Unit Mount
Siemens
JD63B225
Molded Case Circuit Breaker
Brand
Siemens
SKU
JD63B225
Quantity
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Siemens JD63B225 - 225A 3 Pole Molded Case Circuit Breaker
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Description
Designed for industrial power systems, the Siemens JD63B225 is a 225A, 3-pole molded case circuit breaker. It utilizes a thermal-magnetic trip unit with adjustable magnetic settings to deliver precise long-time and instantaneous protection. This unit mount device fits Siemens Sentron panelboards and switchboards. When replacing legacy units, it eventually crosses to the 3VA5322-5EC31-0AA0, which requires a separate mounting strap kit. The breaker includes TA2J6500 lugs and is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | JD63B225 |
| Series | JD6 |
| Amperage | 225A |
| 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
5 answersWhich panelboards are compatible with the JD63B225 breaker?
This unit mount breaker is designed for use in Siemens Sentron panelboards, switchboards, and motor control centers. It requires the correct JD frame mounting strap kit or bus connection hardware specific to your enclosure.
How does the adjustable magnetic trip function on this Sentron breaker?
The thermal element provides fixed overload protection, while the magnetic trip dial allows you to adjust the instantaneous short circuit response. This tuning capability helps electricians accommodate high motor inrush currents and coordinate with downstream protective devices.
Does this breaker include both line and load side lugs?
The JD63B225 comes complete with load side lug terminals that accept up to two conductors per phase. Because it is a unit mount breaker designed for panelboards and switchboards, the line side typically bolts directly to the bus structure rather than using standard wire lugs.
Can this Siemens breaker replace older I-T-E JD frame models?
Yes, Siemens acquired I-T-E and continues to manufacture the Sentron series as the direct replacement for legacy I-T-E breakers. The JD63B225 will fit in the same space as older I-T-E JD63B225 units, though you should inspect existing bus connections for wear before swapping.
What safety procedures apply when adjusting the instantaneous trip settings?
Trip adjustments must only be performed by qualified personnel while the breaker is completely de-energized. Any changes to the magnetic dials must align with a facility coordination study to ensure proper system protection and arc flash safety.
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