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Siemens NGG3B070L Molded Case Circuit Breaker
- 70A
- 3 Pole
- Unit Mount
Siemens
NGG3B070L
Molded Case Circuit Breaker
Brand
Siemens
SKU
NGG3B070L
Quantity
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Siemens NGG3B070L - 70A 3 Pole Molded Case Circuit Breaker
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Description
Operating within the SENTRON GB/GG frame group, the Siemens NGG3B070L is a 70A, 3-pole molded case circuit breaker engineered for commercial power systems. It provides dependable long-time and instantaneous protection through its fixed thermal-magnetic trip unit. This breaker mounts into DIN rail enclosures, switchboards, and control panels, featuring reverse feed capability. Delivering a 25kAIC rating at 480VAC, it ensures robust fault clearing and is succeeded by the 3VA5170-4ED36-0AA0.Specifications
| Brand | Siemens |
|---|---|
| Series | NGG |
| Amperage | 70A |
| 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 | NGG |
|---|---|
| Terminal Type | Lugs |
| For Use With | DIN Rail Enclosures, Control Panels, Switchboards |
| Wire Gauge | 8-1/0 AWG (Cu), 8-2/0 AWG (Al) |
| Max Wire | 1/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 8 AWG |
| 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 |
|---|---|
| Accessories | Line & Load Side Lugs (3TC1GG20) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, HACR, NOM, UL |
| Temp Rating | 40C |
Product FAQs
8 answersCan the NGG3B070L be mounted directly to a DIN rail?
Yes, the NGG frame is designed for integral DIN rail mounting or base mounting with screws, requiring no additional mounting plates or adapters.
What wire sizes do the factory-installed lugs on the NGG3B070L accept?
The included lugs accept 8 to 1/0 AWG copper wire or 8 to 2/0 AWG aluminum wire. The lugs are removable if you need to install alternate terminal hardware for your application.
What is the difference between Siemens NGG and NGB circuit breakers?
While both share the same core thermal-magnetic design, the NGG3B070L is a unit-mount breaker suitable for DIN rail or base mounting in control panels. The NGB equivalent is specifically configured at the line end for panelboard mounting.
Can the NGG3B070L be used in DC electrical systems?
Yes, this breaker is rated for direct current applications up to 125/250VDC with an interrupting capacity of 14kA.
Does the NGG3B070L support field-installable accessories?
Yes, the NGG frame supports UL-listed field-installable accessories, including shunt trips, auxiliary switches, and alarm switches. These accessory modules mount to the left side of the breaker.
Is the NGG3B070L a trip-free circuit breaker?
Yes, it features an overcenter toggle mechanism that is trip-free. If a short circuit or overload occurs, the internal contacts will separate and trip the breaker even if the handle is physically held in the ON position.
What does the L suffix indicate in the NGG3B070L part number?
The L suffix indicates that the circuit breaker is supplied from the factory with line and load lugs installed. If the part number lacks the L, the breaker ships without lugs.
What environmental conditions is the NGG3B070L designed for?
The breaker is factory calibrated for a 40 degrees C ambient temperature. It is intended for indoor use in clean environments, such as standard control panels or switchboards. For outdoor, damp, or dusty locations, it must be installed in an appropriately rated NEMA enclosure.
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