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Siemens 3VA5 UL Frame 125 Circuit Breaker - 70A, 3-Pole, Class H

Siemens 3VA5 UL 125A Frame 70A 3-Pole Circuit Breaker

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ManufacturerSiemens
Part number3VA5170-6EC31-0AA0
Part Number 3VA5170-6EC31-0AA0
Manufacturer Siemens
Series 3VA5
Frame UL 125
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3-pole configuration 70A continuous current 65kA interrupting capacity (Class H) TM230 thermal-magnetic trip unit Adjustable short-circuit protection UL and IEC compliant

The Siemens 3VA5170-6EC31-0AA0 is a high-performance molded case circuit breaker from the 3VA5 UL series, engineered for superior protection in demanding environments. This 3-pole unit features a 125A frame and a 70A continuous current rating, complemented by a Class H breaking capacity of 65 kA at 480V. It incorporates a TM230 thermal-magnetic trip unit with fixed overload protection (Ir=70A) and adjustable short-circuit protection (Ii=5 to 10 x In). The breaker is rated for 600V AC and 500V DC.

Ideal for applications requiring higher interrupting capabilities, this circuit breaker is well-suited for industrial facilities, manufacturing plants, and commercial power distribution systems where fault currents can be substantial. Industries such as heavy manufacturing, processing plants, and large infrastructure projects benefit from its robust protection.

Stanlo Automation, a veteran-owned surplus parts distributor, provides reliable access to critical industrial components like the Siemens 3VA5170-6EC31-0AA0. We are dedicated to offering quality parts with exceptional service, ensuring you find the components you need to keep your automation systems running efficiently.

Part Number3VA5170-6EC31-0AA0
ManufacturerSiemens
Series3VA5
FrameUL 125
Amperage70A
Voltage600V AC
Poles3
Interrupting Rating65kA @ 480V
Breaking Capacity ClassH
Protection TypeThermal Magnetic
FunctionsLI
Trip UnitTM230
Overload ProtectionIr=70A
Short-Circuit ProtectionIi=5-10xIn
IP RatingIP40
Heavy industrial applications
Manufacturing plants
Commercial power distribution
High fault current systems
Process automation
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This breaker is a suitable replacement for older Siemens HHED63B070 and HED43B070 breakers, with potential need for adapters in certain panelboards.
Expert tip
The adjustable short-circuit protection (Ii=5-10 x In) on the TM230 trip unit allows for fine-tuning of the breaker's response to very high fault currents.
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What is the difference between Class M and Class H circuit breakers like the Siemens 3VA5 series?
Class H circuit breakers, such as the 3VA5170-6EC31-0AA0, offer a higher interrupting capacity (65kA at 480V) compared to Class M breakers (35kA at 480V). This makes Class H breakers suitable for systems with higher potential fault currents.