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U01MN6
Siemens U01MN6 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens U01MN6 is an undervoltage trip accessory designed for use with Siemens Sentron low-voltage moulded case circuit breakers. It is specified as a 120 V AC undervoltage trip unit and is used to initiate breaker tripping when the control voltage falls below the required operating threshold. Suitable for Sentron Sensitrip IV SMD, SND and related frame applications, this component helps integrate voltage-loss protection into industrial power distribution panels, switchboards and electrical control systems. Its compact accessory format makes it a practical replacement or spare part for maintaining correct breaker functionality in demanding low-voltage installations.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part Number | U01MN6 |
| Product Type | Undervoltage trip accessory for SENTRON moulded case circuit breakers |
| Product Range | SENTRON Sensitrip IV / ND-frame breaker accessories |
| Function | Trips or prevents closing of a compatible breaker when the control voltage falls below the required operating level |
| Control Voltage | 120 V AC |
| Accessory Configuration | 1 undervoltage trip |
| Auxiliary Switches Included | None |
| Compatible Breaker Frames | Listed for Siemens SMD, SND, SPD and ND-frame SENTRON breaker configurations |
| Typical Application | Electrical protection and control in low-voltage distribution panels and industrial switchgear |
| Related Accessory Variants | U01MN64A adds 1 auxiliary switch; U01MN64AA adds 2 auxiliary switches |
| Commodity Code | 853620 |
| Product Description | Siemens U01MN6 is a 120 V AC undervoltage trip accessory designed for compatible SENTRON moulded case circuit breakers used in low-voltage power distribution systems. |
What type of electrical component is this?
It is an undervoltage trip accessory for low-voltage Sentron moulded case circuit breakers. It is used to trip the breaker when the control voltage falls below the required level.
What control voltage is this undervoltage trip designed for?
U01MN6 is listed for 120 V AC control voltage in Sentron Sensitrip IV accessory tables.
What does an undervoltage trip do in a breaker assembly?
An undervoltage trip monitors a control supply and releases the breaker mechanism if that supply drops too low or is removed. This helps ensure the breaker opens when the associated control circuit is no longer energised.
Which breaker frame ranges is it associated with?
The accessory appears in Siemens Sentron Sensitrip IV accessory data for SMD 800 A, SND 1200 A and SPD 1600 A frame breakers, and is also listed in ND-frame Sentron accessory data.
Is this a complete moulded case circuit breaker?
No. Although it is associated with Sentron moulded case circuit breakers, this catalogue item is an undervoltage trip accessory rather than a complete breaker assembly.
Are auxiliary switch versions listed for the same undervoltage trip rating?
Yes. Related catalogue variants include versions with one auxiliary switch and with two auxiliary switches. For the 120 V AC undervoltage trip, these are listed as U01MN64A and U01MN64AA respectively.
What is the difference between this item and a shunt trip?
An undervoltage trip opens the breaker when the control voltage is lost or falls too low. A shunt trip is typically energised by an external signal to open the breaker on command.
What applications commonly use this type of accessory?
It is commonly used in low-voltage distribution panels, switchgear and industrial power control systems where a breaker must open if a monitored control supply is no longer present.
What product family does it relate to?
It relates to the Sentron Sensitrip IV range of low-voltage moulded case circuit breaker equipment.
What should be checked before fitting it to an existing breaker?
Check the breaker frame type, control voltage, accessory cavity compatibility and whether any auxiliary switch contacts are required. Installation should be carried out by suitably qualified electrical personnel following the relevant breaker instructions.
- Adding undervoltage tripping capability to Siemens SENTRON moulded case circuit breakers
- Disconnecting a circuit breaker when the control voltage drops below the required level
- Protecting industrial electrical panels from abnormal low-voltage conditions
- Supporting motor control centres where undervoltage release functionality is required
- Use in power distribution boards for factories, utilities and commercial buildings
- Integration into low-voltage switchgear assemblies using compatible Siemens breaker frames
- Preventing automatic re-energisation after a voltage loss until the breaker is reset
- Supporting controlled shutdown of machinery circuits during supply voltage interruptions
- Use in panel upgrades where an existing SENTRON breaker requires undervoltage trip operation
- Suitable for maintenance stock for facilities using Siemens SENTRON moulded case circuit breakers
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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Customer reviews
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Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
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Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
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Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
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