Siemens SJD69300NT Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
Siemens
SJD69300NT
Molded Case Circuit Breaker
Brand
Siemens
SKU
SJD69300NT
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Siemens SJD69300NT - 300A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for robust industrial power systems, the Siemens SJD69300NT is a 3-pole, 300A molded case circuit breaker from the Sentron JD frame family. It is designed to mount into Siemens panelboards, switchboards, and motor control centers. Featuring a Sensitrip III electronic trip unit, it provides highly configurable long-time, short-time, and instantaneous (LSI) protection. Rated at 65kAIC at 240V, this true RMS sensing breaker is a dependable choice for complex coordination needs.Specifications
| Brand | Siemens |
|---|---|
| Series | SJD6 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 60-300A |
|---|
| Frame Type | SJD |
|---|---|
| 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
8 answersWhat does the "NT" suffix mean in the SJD69300NT catalog number?
In the Siemens Sentron series, the "NT" suffix indicates that the breaker is equipped with an electronic trip unit featuring LSI (Long-Time, Short-Time, and Instantaneous) protection functions without ground fault protection. Breakers with ground fault protection use the "NGT" suffix.
Can the SJD69300NT be used in reverse feed applications?
Yes. According to Siemens specifications, standard SJD6 frame circuit breakers like the SJD69300NT are acceptable for reverse connection applications. Note that high-interrupting SHJD6 frames do not support reverse feeding.
What specific trip functions can be adjusted on this breaker?
The solid-state electronic trip unit allows you to adjust Long-Time (continuous current and delay), Short-Time (pickup and delay), and Instantaneous pickup settings to precisely coordinate with other protective devices in your electrical system.
What types of equipment is the SJD69300NT designed to fit?
This JD-frame breaker is designed for unit-mount, bolt-on installation in Siemens Sentron panelboards, switchboards, and motor control centers.
What wire size is accepted by the lugs on this 300A breaker?
The standard lugs for this breaker accept wire gauges ranging from 3/0 AWG to 500 kcmil.
Is the SJD69300NT a thermal-magnetic or solid-state breaker?
It is a solid-state breaker. It utilizes an electronic trip unit rather than traditional thermal-magnetic elements, providing highly accurate true RMS sensing and adjustable LSI protection.
What is the difference between the SJD69300NT and the SHJD69300NT?
The SJD69300NT is the standard interrupting capacity version rated at 35kAIC at 480V. The SHJD69300NT is the high interrupting capacity version rated at 65kAIC at 480V. Additionally, the standard SJD6 can be reverse fed, whereas the SHJD6 cannot.
Are the trip units on the SJD69300NT interchangeable?
No. Siemens solid-state trip breakers in this frame size are non-interchangeable. The frame and electronic trip unit are factory assembled and cannot be swapped in the field.
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