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Siemens NGG3B040L Molded Case Circuit Breaker
- 40A
- 3 Pole
- Unit Mount
Siemens
NGG3B040L
Molded Case Circuit Breaker
Brand
Siemens
SKU
NGG3B040L
Quantity
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Siemens NGG3B040L - 40A 3 Pole Molded Case Circuit Breaker
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Description
Built for demanding industrial environments, this 40A, 3-pole MCCB provides essential long-time and instantaneous trip functions. The NGG3B040L ensures consistent short-circuit defense across commercial applications. The unit mounts securely onto DIN rails or into compatible switchboards. It features a reverse feed capable design and is replaced by the 3VA5140-4ED36-0AA0. With an interrupting capacity of 100kA at 120VAC, this NGG frame breaker comes complete with 3TC1GG20 lugs.Specifications
| Brand | Siemens |
|---|---|
| Series | NGG |
| Amperage | 40A |
| 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, HID, NOM, UL |
| Temp Rating | 40C |
Product FAQs
8 answersDoes the NGG3B040L require an adapter for DIN rail mounting?
No. The Siemens NGG frame features an integral DIN rail mounting design. It can be mounted directly onto a standard DIN rail or base-mounted with screws without requiring additional adapter plates.
What does the L suffix mean in the NGG3B040L part number?
The L suffix indicates that the circuit breaker is supplied with factory-installed lugs on both the line and load sides.
What is the difference between Siemens NGG and NGB circuit breakers?
Both share the same internal thermal-magnetic trip design, but their mounting configurations differ. The NGG frame is built for unit mounting in control panels or DIN rail enclosures. The NGB frame has a modified line end specifically configured for Siemens panelboard mounting.
Can the NGG3B040L be reverse fed?
Yes. This breaker has a feed-thru unit mount design and is suitable for reverse feed applications where power flows from the load side to the line side, in accordance with UL 489 standards.
What is the modern replacement for the NGG3B040L circuit breaker?
Siemens is transitioning the NGG series to the newer 3VA molded case circuit breaker family. The direct functional replacement for this 40A, 3-pole breaker is the 3VA5140-4ED36-0AA0, though panel fitment and dimensions should be verified before retrofitting.
Can I add a shunt trip or auxiliary switch to this breaker?
Yes. The NGG frame supports UL-listed, field-installable internal accessories. Operational devices like shunt trips, auxiliary switches, or alarm switches can be installed in the accessory pocket on the left side of the breaker.
Are the trip settings adjustable on the NGG3B040L?
No. This breaker features a fixed thermal and fixed magnetic trip unit. The long-time overload and instantaneous short-circuit trip points are factory calibrated and cannot be adjusted in the field.
What are the physical dimensions of the NGG3B040L breaker?
This 3-pole G-frame breaker measures approximately 3.0 inches wide, 5.4 inches high, and 2.8 inches deep. Each pole is 1.0 inch wide.
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