Free Shipping Over $99
Siemens CJD63B250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Siemens
CJD63B250
Molded Case Circuit Breaker
Brand
Siemens
SKU
CJD63B250
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens CJD63B250 - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Similar Items
200A 3 Pole Molded Case Circuit Breaker
350A 3 Pole Molded Case Circuit Breaker
400A 3 Pole Molded Case Circuit Breaker
Description
Engineered for industrial applications, the Siemens CJD63B250 is a 3-pole, 250A MCCB from the Sentron family. This JD-frame unit provides reliable overcurrent protection. Designed for unit mounting, it installs into Siemens P4 and P5 panelboards, switchboards, and enclosures. It accepts 3/0 AWG to 500 kcmil wire. Featuring a fuseless, current-limiting design, it achieves a 200kAIC rating at 240VAC. The thermal-magnetic trip unit offers adjustable magnetic settings (LI).Specifications
| Brand | Siemens |
|---|---|
| Part Number | CJD63B250 |
| Series | CJD |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 150kA @ 480VAC, 100kA @ 600VAC, 50kA @ 500VDC |
| Frame Type | CJD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4, P5 Panelboards, Switchboards, Enclosures |
| Wire Gauge | 3/0 AWG to 500 kcmil (Cu/Al) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| 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, Lug Kits, Rotary Handle, Motor Operator |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Non-Interchangeable Trip, Reverse Feed |
Product FAQs
6 answersWhich Siemens panelboards accept the CJD63B250 circuit breaker?
This unit-mount JD-frame breaker is compatible with Siemens P4 and P5 panelboards, as well as Siemens switchboards and standalone enclosures.
Is the CJD63B250 a current-limiting breaker?
Yes, the CJD frame features a fuseless, current-limiting design. This restricts the amount of fault energy that passes through the breaker, allowing it to achieve an ultra-high interrupting rating of 150kA at 480VAC and 100kA at 600VAC.
How does the CJD63B250 compare to the JD63B250 and HJD63B250?
While all three are 250A, 3-pole JD-frame breakers, they differ in interrupting capacity and trip unit design. The JD63B250 is standard capacity, the HJD63B250 is high capacity, and the CJD63B250 is a current-limiting breaker with the highest interrupting ratings. Additionally, the CJD model uses a non-interchangeable trip unit.
What wire sizes are supported by the CJD63B250 lugs?
The breaker accepts copper or aluminum conductors ranging from 3/0 AWG to 500 kcmil. Ensure proper torque specifications are followed during installation as outlined on the breaker faceplate.
Does the CJD63B250 have an adjustable trip unit?
It features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection. This allows you to tune the magnetic trip point to coordinate with downstream devices or specific load requirements.
Can the CJD63B250 be used in DC power systems?
Yes, in addition to its AC ratings, this breaker is rated for a 50kA interrupting capacity at 500VDC, making it suitable for DC power distribution and battery backup applications.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.