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Siemens SJD69400NT Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Siemens
SJD69400NT
Molded Case Circuit Breaker
Brand
Siemens
SKU
SJD69400NT
Quantity
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Siemens SJD69400NT - 400A 3 Pole Molded Case Circuit Breaker
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400A 3 Pole Molded Case Circuit Breaker
400A 3 Pole Molded Case Circuit Breaker
Description
Delivering robust overcurrent protection, the Siemens SJD69400NT functions as a 400A electronic trip circuit breaker designed for commercial and industrial facilities. This JD-frame breaker features a unit-mount configuration that fits into Sentron panelboards and motor control centers. It can eventually be upgraded to the 3VA Series. Equipped with an LSI Sensitrip III unit, it offers 35kAIC at 480V and fully adjustable trip settings, ensuring precise system coordination.Specifications
| Brand | Siemens |
|---|---|
| Part Number | SJD69400NT |
| Series | SJD6 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 80-400A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 3/0 AWG - 500 kcmil |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Reverse Feed, Non-Interchangeable Trip, True RMS Sensing, HACR Rated |
Product FAQs
6 answersWhat does the "NT" suffix mean in the SJD69400NT catalog number?
The "NT" suffix indicates that the circuit breaker is supplied with no terminals. Lugs are not included with this model, so you must source the appropriate JD-frame lug kits separately based on your specific conductor requirements.
Can the Siemens SJD69400NT be reverse fed?
Yes, this SJD6 frame breaker is acceptable for reverse connection applications. This allows you to safely terminate the line power to either the top or bottom of the breaker, providing flexibility during panelboard or switchboard installation.
What trip functions are adjustable on the SJD69400NT?
This breaker features a solid-state electronic trip unit with LSI functions. You can adjust the Long-Time, Short-Time, and Instantaneous settings to precisely coordinate with your system's overcurrent protection requirements.
What equipment is the SJD69400NT compatible with?
This 400A JD-frame breaker is designed for use in Siemens Sentron panelboards, switchboards, and motor control centers. It features a unit-mount, bolt-on configuration for secure installation in these enclosures.
What wire sizes are accepted by the standard lugs for this 400A breaker?
When equipped with standard Siemens JD-frame lugs, the terminals accept copper or aluminum conductors ranging from 3/0 AWG to 500 kcmil. Because this is an "NT" model, ensure the separately purchased lugs match your required wire gauge.
What is the advantage of the electronic trip unit on this breaker?
The solid-state trip technology provides highly accurate, adjustable LSI trip settings. This allows for much tighter system coordination and precise overcurrent protection compared to standard thermal-magnetic breakers.
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