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Square D PJA PowerPacT P-Frame I-Line Circuit Breaker, 3-Pole, 600VAC
Model: SQU-PJA
Square D PJA PowerPacT P-Frame I-Line Circuit Breaker, 3-Pole, 600VACThe Square D PJA PowerPacT P-Frame I-Line circuit breaker is engineered to protect electrical distribution systems from damage...
Square D
$28,831.94
Square D PowerPacT L-Frame I-Line Circuit Breaker
The Square D PowerPacT L-Frame I-Line circuit breaker is engineered to protect electrical distribution systems from damage caused by overloads and short circuits. This L-Frame family is available in a 600A rating, 3 pole configuration, with a 600VAC operational voltage and 18kA interrupt rating, and is equipped with the MicroLogic 3.3 S electronic trip unit for reliable, code-compliant overcurrent protection in I-Line panelboards.
Key Features
- Rated Configuration: 600A, 3 pole design for demanding industrial and commercial distribution circuits.
- Operational Voltage: 600VAC (Ue rated operational voltage 600 V AC 50/60 Hz per IEC 60947-3); rated insulation voltage 750V IEC 60947-2.
- Interrupt Capacity: 18kA rating, with Ics service breaking capacity of 65 kA at 220/240V AC and 35 kA at 380/440/415V AC per IEC 60947-2.
- Trip Unit Technology: MicroLogic 3.3 S electronic, standard LSI trip unit with adjustable long time pick-up range of 0.25...1 x In.
- Continuous Current Rating: 80% rated for sustained load applications.
- Electrical Connection: I-Line connection on the line side with lug connections on the load side, mounted via I-Line bracket.
- Degree of Protection: Front cover IP40 for added enclosure protection.
- Local Signalling: LED indicators including alarm at 105% Ir (red), alarm at 90% Ir (orange), and ready status (green).
Certifications & Compliance
- UL Listed
- CSA Certified
- NOM Certified (NOM-003-SCFI-2000)
- Rated per IEC 60947-2 and IEC 60947-3
- Suitable for Isolation per IEC 60947-2
- RoHS EUR Compliant with Exemptions
- Mercury Free
Technical Specifications
- Warranty: 18 months
- Warranty Period: 18 months
- Sustainable Packaging: No
- Mercury Free: Yes
- Packaging Without Single Use Plastic: No
- Tier Id: 1
- ROHS Eur In Scope: Yes
- Recycled Metal Content At Cr Level: 0 %
- Poles Description: 3P
- Serviceability: Yes
- With Recycled Cardboard: Yes
- WEEE Product Category: 4
- China ROHS In Scope: No
- Return Indicator: Y
- Utilisation Category: category A
- Terminal Identifier: AL600LF52K3
- Take Back: No
- Tier: 1
- Returnability: Yes
- Field Service Division: PPIBS
- Long Time Pick Up Adjustment Range: 0.25...1 x In
Typical Applications
- Industrial and Commercial Electrical Distribution Systems
- Main Panel Disconnect for Control Panels
- I-Line Panelboard and Switchboard Installations
- Overload and Short-Circuit Protection for Feeder Circuits
- OEM and Panel Builder Control Panel Applications
Why Square D?
Square D PowerPacT L-Frame breakers combine an electronic MicroLogic 3.3 S trip unit with rigorous IEC 60947-2/60947-3 rated performance, UL, CSA, and NOM certification, and a mercury-free, RoHS-compliant construction. This makes the PowerPacT L-Frame a dependable choice for electricians, panel builders, and system integrators who need code-compliant, serviceable overcurrent protection backed by an 18-month warranty.
Manufacturer Resources
Product Specs
- Product Type:
- Circuit Breaker
- Series:
- PowerPacT
- Voltage Rating:
- 600VAC
- Amperage Rating:
- 600A
- Configuration:
- 3-Pole I-Line
- Listing:
- UL Listed
- Standards:
- IEC 60947-2
- Department:
- Electrical
- Product Group:
- Circuit Protection
- Product Subgroup:
- Circuit Breakers
- Product Color:
- Black
- Product Width:
- 5.51 in
- Product Height:
- 13.39 in
- Product Depth:
- 4.33 in
Square D LGA36600U33X – Frequently Asked Questions
1) Will the Square D PowerPacT L-Frame LGA36600U33X bolt into an existing I-Line panelboard?
Yes. The LGA36600U33X is built as a 3-pole I-Line breaker: the line side uses the I-Line stab connection and mounts with an I-Line bracket, so it plugs onto the panelboard bus rather than being cabled in. The load side is lug connection, so you land your feeder conductors there. Check that your panel bus has the vertical space for a breaker measuring 13.39 in high, 5.51 in wide and 4.33 in deep.
2) Is 18kA enough interrupting capacity for my 600V service, or do I need a higher AIC breaker?
The LGA36600U33X carries an 18kA interrupt rating, and it is rated for 600VAC operation. If your available fault current at the panel exceeds 18kA at 600V, this breaker is not the right choice and you need a higher interrupting rating or a series-rated combination. Run the fault current calculation at the point of installation before committing.
3) What does the MicroLogic 3.3 S trip unit actually adjust, and does it give ground fault protection?
The 3.3 S is an LSI electronic trip unit: long time, short time, and instantaneous. Long time pick-up adjusts from 0.25 to 1 x In, which on a 600A frame means roughly 150A to 600A of settable pick-up. LSI means there is no ground fault element in this unit, so if the job spec calls for integral ground fault protection you need a different MicroLogic trip unit. The breaker also carries front LEDs: green for ready, orange alarm at 90% Ir and red alarm at 105% Ir, so an electrician can see an approaching overload without instrumentation.
4) Is there a molded case breaker that can be used instead of the PowerPacT L-Frame 600A in an I-Line panelboard?
No. The PowerPacT L-Frame LGA36600U33X uses an I-Line connection on the line side with lug connections on the load side and mounts on an I-Line bracket, so it plugs onto Square D I-Line bus stabs. Other three-pole molded case breakers such as the ABB A2A150TT in the A2 Series or the ABB XT5 breaker kit are built on their own mounting and connection systems and do not land on I-Line bus. For an I-Line panelboard, stay with an I-Line-connected L-Frame.
5) Can a Quicklag bolt-on breaker replace the PowerPacT L-Frame on a 600V distribution circuit?
No. The PowerPacT L-Frame LGA36600U33X is rated 600VAC and carries a MicroLogic 3.3 S electronic LSI trip unit with an adjustable long time pick-up of 0.25 to 1 x In. The Eaton BAB Quicklag BAB-302 is a three-pole thermal-magnetic breaker rated 240V, and the BAB1010 is a bolt-on thermal-magnetic unit with a fixed thermal-magnetic trip. Those are branch-circuit devices for lower voltage panels, not a substitute for a 600A 600V feeder breaker.
6) Can a Square D PowerPacT L-Frame I-Line breaker be used as the main disconnect in a control panel?
Yes. It is suitable for isolation per IEC 60947-2, which is what lets it serve as a main panel disconnect ahead of control panel circuits, as well as feeder overload and short-circuit protection in I-Line panelboards and switchboards. Utilisation category A, so it is a non-selective distribution device by category, suited to end-of-line and feeder duty rather than deliberate time-delayed upstream coordination.
7) Does this Square D breaker meet the approvals we need for a US, Canadian and Mexican install?
Approvals cover all three: UL Listed, CSA Certified, and NOM Certified to NOM-003-SCFI-2000, with IEC 60947-2 and 60947-3 ratings on top. Construction is mercury free and RoHS EUR compliant with exemptions. Country of origin is Mexico, which matters if you are filing trade or domestic-content paperwork.
8) Is a molded case breaker like the PowerPacT L-Frame the right type, or should I be looking at a bolt-on or miniature breaker?
The L-Frame at 600A, 3-pole, 600VAC is a molded case device for feeder and main duty in I-Line panelboards and switchboards. It is the wrong tool for branch circuits. For lighting and receptacle branches in a load center, a bolt-on thermal-magnetic breaker such as the Eaton BAB Quicklag line is the type to use, and for control-circuit and equipment protection a DIN-rail miniature breaker like the ABB ST200M C-curve (UL 1077) is the category. Those are supplementary or branch devices, not 600A feeder protection.
9) What other brands of 3-pole molded case breaker could I use instead of the Square D L-Frame?
Cross-brand molded case options in the same general class include the ABB A2A150TT from the A2 Series and ABB's XT4 and XT5 series 3-pole breaker kits. One caution: the Square D L-Frame here is an I-Line stab-mount device, so an ABB or Eaton molded case breaker will not plug onto an I-Line bus. Swapping brands means a cable-connected or different-mount installation, not a drop-in.
10) For a 400A three-pole feeder instead of 600A, what breaker should I look at?
The PowerPacT L-Frame LGA36600U33X is a 600A, 3-pole device, so it is oversized if the feeder calls for 400A. The Eaton Series C K-Frame 6602C72G67 is a 400A 3-pole breaker with an interchangeable rating plug, which lets the trip rating be set below the frame size. Note that it is a mining-duty Series C unit on Eaton's own mounting, not an I-Line plug-on, so confirm the enclosure or panel it is going into.
11) Would a miniature circuit breaker work for the control panel disconnect instead of an L-Frame?
Only for the small branch devices inside the panel, not for the main. The PowerPacT L-Frame LGA36600U33X is a 600A 600VAC breaker listed to UL and rated per IEC 60947-2, and it is used as a main panel disconnect for control panels. The ABB ST200M Series miniature breaker is a C-curve device recognized to UL1077 as supplementary protection, which is a different listing basis and not usable where UL-listed branch or main overcurrent protection is required.
12) What is the difference between the PowerPacT L-Frame breaker and an ABB XT4 breaker kit?
The PowerPacT L-Frame LGA36600U33X ships as a complete 600A 3-pole breaker with an I-Line line-side connection, load-side lugs, an IP40 front cover, and the MicroLogic 3.3 S electronic trip unit, measuring 13.39 in high by 5.51 in wide by 4.33 in deep. The ABB MBB33 is an XT4 Series three-pole molded case breaker kit, a smaller XT-platform frame on ABB's own mounting arrangement. They serve different panel systems and frame sizes.
13) Can the trip unit be replaced in the field if it fails, or is the whole breaker scrap?
The L-Frame is listed as serviceable and returnable, and Square D supports it through its PPIBS field service division, so it is not a throwaway device. For ordering spares, the terminal identifier on this configuration is AL600LF52K3. The exact part to order is LGA36600U33X.
14) How much enclosure protection does the front of the PowerPacT L-Frame provide?
Front cover is IP40, which means protection against solid objects 1 mm and larger but no water ingress rating. It is dust-and-finger protection at the escutcheon, suitable for indoor panel and switchboard fronts; wet or washdown locations need the enclosure itself to carry the rating.
15) I need an undervoltage release with my breaker - does the PowerPacT L-Frame include one?
The PowerPacT L-Frame LGA36600U33X is supplied with the MicroLogic 3.3 S electronic LSI trip unit and LED local signalling for alarm at 105% Ir, alarm at 90% Ir, and ready status; a shunt or undervoltage release is a separate accessory. The Eaton 10250T-GR is an undervoltage release built for Eaton NZM Series molded case breakers, so it is matched to that frame rather than to an L-Frame.
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Does the Square D LGA36600U33X come with a warranty?
Absolutely. The Square D LGA36600U33X is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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