Eaton / Cutler-Hammer J3090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer J3090 - 90A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for commercial and industrial applications, the Eaton J3090 is a 3-pole, 90A molded case circuit breaker. It provides robust overcurrent and short-circuit protection for heavy-duty electrical systems. This bolt-on MCCB mounts into classic Westinghouse panelboards, switchboards, and motor control centers. For modern upgrades, it is replaced by the JD3090 or JDB3090 models. Rated for 35kAIC at 480VAC, it features fixed thermal and adjustable magnetic trip functions.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | J3090-R |
| Series | J |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 4 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs included |
| Standards | CSA C22.2 No. 5.1, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Trip-Free Mechanism |
Product FAQs
6 answersWhich panelboards are compatible with the J3090 circuit breaker?
This J-frame breaker is designed to bolt directly into classic Westinghouse, Cutler-Hammer, and Eaton panelboards, switchboards, and motor control centers.
What are the modern replacement options for the J3090?
If you are upgrading or replacing an older J3090, the Eaton JD3090 and JDB3090 are the direct modern equivalents for this J-frame footprint.
What wire sizes and materials are supported by the J3090 terminals?
The factory-installed load-side lugs accommodate both aluminum and copper conductors, accepting wire gauges from 4 AWG up to 350 kcmil.
How does the trip unit function on the J3090?
It utilizes a thermal-magnetic trip mechanism. The thermal element provides fixed long-time overcurrent protection, while the magnetic element is adjustable for instantaneous short-circuit response.
Is the J3090 suitable for direct current systems?
Yes, in addition to standard AC voltages, this breaker is rated for 250VDC applications with a 10kA interrupting capacity.
What safety precautions should be taken before installing the J3090?
Always verify that the panelboard or switchboard is completely de-energized and follow standard lockout/tagout procedures before bolting the breaker to the busbar.
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Reviews
Review summary
Customers rate this product 4.0 out of 5 based on 1 review.
- MCMARK C.Verified BuyerReviewingITE/Siemens J20M Control RelayI recommend this productRated 4 out of 5 stars2/4/26it control relay but it was just the coil for the relay. do you have a J20A40 CONTACTS?
it control relay but it was just the coil for the relay. do you have a J20A40 CONTACTS?