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Siemens NGG3B030 Molded Case Circuit Breaker
- 30A
- 3 Pole
- Unit Mount
Siemens
NGG3B030
Molded Case Circuit Breaker
Brand
Siemens
SKU
NGG3B030
Quantity
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Siemens NGG3B030 - 30A 3 Pole Molded Case Circuit Breaker
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Description
Built for heavy-duty power distribution, the Siemens NGG3B030 is a 3-pole, 30A MCCB from the Sentron GG frame lineup. It utilizes a reliable thermal-magnetic trip mechanism to deliver LI protection against overloads. Designed for flexibility, this breaker mounts into control panels and DIN rail enclosures. It features nut keeper plates instead of standard lugs, allowing for custom lug kits or reverse-feed setups. Rated 25 kAIC at 480VAC, it is replaced by the newer 3VA5130-4ED31-0AA0.Specifications
| Brand | Siemens |
|---|---|
| Part Number | NGG3B030 |
| Series | NGG |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 120VAC, 240VAC, 480VAC, 600Y/347VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 120VAC, 65kA @ 240VAC, 25kA @ 480VAC, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | GG |
|---|---|
| Terminal Type | Lugs |
| For Use With | DIN Rail Enclosures, Control Panels, Switchboards |
| 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, Alarm Switch, Undervoltage Release, Padlock Attachment, Lug Kits |
|---|---|
| Accessories | Nut Keeper Plates |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, HACR, HID, NOM, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhat is the recommended replacement for the obsolete Siemens NGG3B030?
Siemens is phasing out the Sentron NGG series. The manufacturer's recommended replacement is the 3VA51 series, specifically catalog number 3VA5130-4ED31-0AA0. If you require factory-installed lugs, use catalog number 3VA5130-4ED36-0AA0. Always verify panel clearances and lug wire ranges before upgrading.
What wire size range do the standard lugs accept on this 30A breaker?
When fitted with standard TC1Q1 mechanical lugs, the terminals accept 14 to 6 AWG copper conductors or 12 to 6 AWG aluminum conductors.
How is this GG frame breaker mounted inside an enclosure?
The NGG3B030 is a unit-mount, bolt-on circuit breaker. It can be fastened directly to a backpan using mounting screws or snapped onto a standard 35mm DIN rail for quick installation in control panels.
Which internal accessories are compatible with the NGG3B030?
This breaker accepts Siemens CQD-style field-installable accessories. You can add auxiliary switches like the CQDA1 or CQDA2, as well as CQD series shunt trips, depending on your control circuit requirements.
How does the fixed thermal-magnetic LI trip unit operate?
The LI designation means the breaker provides Long-Time (L) thermal protection against sustained overloads and Instantaneous (I) magnetic protection against short circuits. Both the thermal and magnetic trip points are factory fixed and non-adjustable on this 30A model.
Can the NGG3B030 be used in direct current (DC) applications?
Yes, this breaker is UL rated for DC applications. It provides a 14kAIC interrupting rating at 125/250VDC, making it suitable for battery systems, DC control panels, and transit applications.
Is this breaker compatible with standard residential load centers?
No. This is a unit-mount breaker designed for industrial control panels, DIN rail enclosures, and commercial switchboards. It will not fit into standard plug-on or bolt-on residential load centers that require branch breakers like the QP or BL series.
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