Siemens / ITE LL63B600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Quantity
Siemens / ITE LL63B600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for industrial applications, the Siemens LL63B600 delivers 600A overcurrent protection. This 3-pole, 600VAC unit mount MCCB utilizes a thermal magnetic trip with fixed thermal and adjustable magnetic settings. Designed as a legacy replacement, it fits seamlessly into Siemens P4 and P5 panelboards. It serves as an exact match for aging infrastructure and is officially replaced by the LD63B600. Rated 35kAIC at 480VAC, this L-Frame breaker includes TA2J6500 lugs and is HACR rated.Specifications
| Brand | Siemens / ITE |
|---|---|
| Series | LL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | LL63 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4, P5 Panelboards, Switchboards |
| Wire Gauge | (2) 3/0 AWG-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 |
|---|---|
| Accessories | Line and Load Side Lugs (TA2J6500) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Interchangeable Trip Unit |
Product FAQs
7 answersWhat panelboards are compatible with the LL63B600?
This breaker is designed for use in Siemens P4 and P5 panelboards, as well as compatible Siemens switchboards. It requires the appropriate mounting hardware kit for secure bolt-on installation in these enclosures.
What are the lug wire size requirements for this breaker?
The standard lugs accept two conductors per phase, ranging from 3/0 AWG to 500 kcmil for either copper or aluminum wire. Ensure proper torque specifications are followed during termination to prevent overheating.
How does the adjustable magnetic trip work on this model?
This thermal-magnetic breaker features a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection. The instantaneous trip setting can be adjusted in the field to coordinate with downstream devices and specific load inrush currents.
Can this breaker replace older ITE L-frame models?
Yes, this breaker can replace older ITE or Siemens L-frame breakers with the same physical dimensions and mounting footprint. Verify that the interrupting ratings and lug configurations match your existing setup before replacing.
Is this circuit breaker suitable for DC applications?
Yes, it is rated for up to 500VDC with a 25kA interrupting capacity. When installing in DC systems, consult the manufacturer guidelines for proper pole wiring configurations, as DC arcs require specific termination methods compared to AC loads.
Does this breaker mount onto a standard DIN rail?
No, this is a unit-mount, bolt-on molded case circuit breaker. It is designed to be bolted directly to the busbar or mounting pan in heavy-duty panelboards and switchboards, not for DIN rail applications.
What does the LI trip function code indicate?
The LI designation indicates that the trip unit provides Long-Time (L) and Instantaneous (I) protection. Long-Time protects against sustained overloads, while Instantaneous provides immediate tripping during severe short circuits.
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