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Square D BJA160203 Molded Case Circuit Breaker
- 20A
- 1 Pole
- I-Line
Square D
BJA160203
Molded Case Circuit Breaker
Brand
Square D
SKU
BJA160203
Quantity
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Square D BJA160203 - 20A 1 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial applications, the Square D BJA160203 is a 1-pole, 20A molded case circuit breaker from the PowerPacT B-Frame family. It delivers reliable thermal-magnetic protection for distribution systems. Featuring an I-Line mounting style with a Phase B connection, it integrates into Square D I-Line panelboards. It also serves as a direct replacement for legacy FH16020B breakers. Rated 65 kAIC at 480Y/277V, this MCCB includes fixed LI trip functions and a current-limiting design.Specifications
| Brand | Square D |
|---|---|
| Part Number | BJA160203 |
| Series | BJA |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC, 480Y/277VAC, 600Y/347VAC, 125VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 208Y/120VAC, 100kA @ 240VAC, 65kA @ 480Y/277VAC, 25kA @ 600Y/347VAC, 50kA @ 125VDC |
| Frame Type | BJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-2/0 AWG (Al/Cu) |
| Max Wire | 2/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Handle Padlock Attachment |
|---|---|
| Accessories | Phase B Connection |
| Standards | CSA C22.2 No 5, EN/IEC 60947-2, GB 14048.2, NEMA AB 1, NMX J-266, UL 489 |
| Approval | CCC, CE, CSA, EAC, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 80% Rated, Phase B Connection, Reverse Feed |
Product FAQs
7 answersWhat type of panelboards are compatible with the BJA160203?
This breaker is designed exclusively for use in Square D I-Line panelboards. It features an I-Line style plug-in connection on the line side and cannot be installed in standard QO or Homeline load centers.
Does the PowerPacT BJA160203 replace older Square D breakers?
Yes, the PowerPacT B-frame series is the modern replacement for legacy Square D F-frame breakers. Specifically, this model serves as a direct replacement for older 1-pole, 20A I-Line breakers like the FH16020B.
How are conductors terminated on the BJA160203?
The line side features a plug-on I-Line connection that mounts directly to the panelboard bus. The load side is equipped with a mechanical lug that accepts 14 AWG to 2/0 AWG aluminum or copper wire.
Can the BJA160203 be used in direct current applications?
Yes, this thermal-magnetic breaker is rated for DC systems up to 125VDC, where it provides an interrupting rating of 50kA.
What does the J in the BJA160203 catalog number signify?
In the Square D PowerPacT B-frame series, the J indicates the interrupting rating tier. For this breaker, it signifies a rating of 100kA at 240VAC, 65kA at 480Y/277VAC, and 25kA at 600Y/347VAC.
Does this breaker require a separate mounting bracket for installation?
No, the BJA160203 features a self-contained I-Line mounting design. The breaker snaps directly onto the bus assembly of an I-Line panelboard without the need for additional mounting hardware.
Are the trip settings adjustable on this breaker?
No, the BJA160203 features fixed thermal and fixed magnetic trip elements. It provides standard long-time and instantaneous (LI) protection without adjustable dials.
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Reviews
Review summary
Customers rate this product 4.3 out of 5 based on 3 reviews.
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Rating
3 reviews
- RHRyan H.Verified BuyerReviewingSchneider Electric BJA36020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/6/25Breaker
It was as described and worked as it should.
- LOLake O.ReviewingSchneider Electric BJA36020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars10/7/21Staff was very helpful.
Staff was very helpful.
- RKRobert K.ReviewingSquare D BJA36040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars1/26/21Breakers
Always fast service. Get my breakers the next day.