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ABB XT1NU3070AFD000XXX Molded Case Circuit Breaker
- 70A
- 3 Pole
- Unit Mount
ABB
XT1NU3070AFD000XXX
Molded Case Circuit Breaker
Brand
ABB
SKU
XT1NU3070AFD000XXX
Quantity
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ABB XT1NU3070AFD000XXX - 70A 3 Pole Molded Case Circuit Breaker
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70A 3 Pole Molded Case Circuit Breaker
70A 3 Pole Molded Case Circuit Breaker
70A 3 Pole Molded Case Circuit Breaker
Description
Engineered for commercial and industrial applications, this 70A molded case circuit breaker belongs to the ABB SACE Tmax XT1 frame family. It installs into compatible panelboards and switchboards, serving as a reliable replacement for legacy T1N070TW units. The device features a fixed thermal-magnetic trip unit (TMF) providing long-time and instantaneous protection. Rated for 50kA at 240VAC, it includes load-side lugs for copper or aluminum wiring and carries a HACR rating.Specifications
| Brand | ABB |
|---|---|
| Series | XT1 |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC, 500VDC |
| Phase | 3 |
| AIC Rating | 50kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600Y/347VAC, 36kA @ 250VDC, 36kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | ABB SACE Tmax XT Panelboards, Switchboards |
| Wire Gauge | 10 AWG - 2/0 AWG |
| Max Wire | 2/0 AWG |
| Min Wire | 10 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, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs (Kit FC CuAl 10-2/0 AWG) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, cULus, HACR, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
6 answersWhich enclosures are approved for the XT1NU3070AFD000XXX breaker?
This unit mount breaker is engineered for ABB SACE Tmax XT panelboards and compatible switchboards. It is not designed for plug-in or drawout configurations and requires standard hardwired mounting hardware.
What are the conductor requirements for the factory lugs on this breaker?
The included lugs accept conductors ranging from 10 AWG to 2/0 AWG. Electricians must verify the wire material compatibility and apply the manufacturer specified torque during termination to prevent arcing and ensure a secure connection.
Are the trip settings adjustable on this 70A Tmax XT breaker?
No, this specific model utilizes a fixed thermal and fixed magnetic trip unit. The Long-Time and Instantaneous (LI) protection parameters are factory set and cannot be modified by the installer in the field.
Is the XT1NU3070AFD000XXX suitable for direct current (DC) systems?
Yes, this molded case circuit breaker is rated for both AC and DC applications. It provides a 36kA interrupting capacity at both 250VDC and 500VDC, allowing integration into compatible DC switchboards and control panels.
How do I select compatible accessories for this ABB circuit breaker?
Because this unit is built on the SACE Tmax XT1 frame, any internal accessories such as auxiliary contacts, undervoltage releases, or shunt trips must be explicitly designed for the XT1 form factor to ensure proper fit and function.
What are the primary safety considerations before energizing this breaker?
Prior to energizing, a qualified electrician must confirm that the available fault current does not exceed the breaker interrupting ratings, such as 25kA at 480VAC. Additionally, all line and load side lug connections must be properly torqued and the panelboard must be fully secured.
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