The Siemens 3WT9853-1JM00 is an accessory for Siemens 3WT8 circuit breakers, configured as an undervoltage release "F3". It is designed for applications requiring a 380–415 V AC control supply at 50/60 Hz and provides an additional control and safety function for compatible 3WT8 circuit breakers.
An undervoltage release is used to ensure that the circuit breaker responds appropriately when the control voltage falls below the specified operating level. Depending on the breaker configuration and control scheme, this accessory can initiate breaker opening when the control supply is interrupted or falls outside the required operating range.
The 3WT9853-1JM00 is intended for integration into compatible Siemens 3WT8 circuit breakers. Its F3 designation identifies the accessory's functional position within the circuit-breaker accessory system. The control supply requirement is 380...415 V AC, 50/60 Hz, so the available control voltage should be verified before installation.
This Siemens undervoltage release is particularly useful in electrical distribution and industrial power systems where voltage-dependent circuit-breaker control, protection coordination or automatic disconnection is required. It can be used as part of a broader electrical control and protection strategy for switchboards, industrial distribution systems and large power circuits.
The accessory should be installed according to the applicable Siemens 3WT8 circuit-breaker documentation and accessory configuration. Compatibility with the specific 3WT8 breaker version should be checked before ordering or installation.
| Specification | Details |
|---|---|
| Product | Siemens 3WT9853-1JM00 |
| Product Type | Undervoltage Release |
| Accessory Designation | F3 |
| Compatible Circuit Breaker | Siemens 3WT8 |
| Control Supply Voltage | 380...415 V AC |
| Frequency | 50/60 Hz |
| Application | Undervoltage protection and circuit-breaker control |
The Siemens 3WT9853-1JM00 undervoltage release can be considered for:
The Siemens 3WT9853-1JM00 adds an important control function to compatible 3WT8 circuit breakers by providing undervoltage release capability. This allows the circuit-breaker operation to be linked to the availability of its designated control supply.
The 380...415 V AC control voltage rating makes this accessory suitable for installations using this commonly encountered industrial AC control-supply range. Its 50/60 Hz compatibility supports use in electrical systems operating at either frequency.
The undervoltage release can be useful in control schemes where the circuit breaker must respond to a loss or insufficient level of control voltage. This can support selected automatic disconnection, protection and equipment-control strategies, depending on the complete circuit design.
Because the accessory is specifically intended for Siemens 3WT8 circuit breakers, it provides a purpose-designed solution for adding the required undervoltage function without using an unrelated external device.
For panel builders, switchgear manufacturers, OEMs and industrial maintenance teams, using the correct Siemens accessory helps maintain compatibility with the associated breaker configuration and control arrangement.
The Siemens 3WT9853-1JM00 undervoltage release F3 can be considered for projects across Faridabad, Delhi NCR, Noida, Gurgaon/Gurugram, Ghaziabad, Punjab, Mumbai, Pune, Ahmedabad, Hyderabad, Bengaluru/Bangalore, Chennai, Kolkata, Jaipur, Chandigarh, Ludhiana and other major industrial locations across India.
Before installation, verify the 3WT8 breaker type, accessory position F3, control supply voltage, frequency and the applicable Siemens wiring/installation instructions.
SB Smart supplies Siemens circuit breakers, switchgear accessories and industrial electrical products for OEMs, panel builders, electrical contractors, system integrators and industrial maintenance teams across India.
The Siemens 3WT9853-1JM00 F3 undervoltage release is suitable for customers looking for a compatible Siemens accessory for 3WT8 circuit breakers in industrial and commercial power-distribution applications.
SB Smart supports Siemens product sourcing requirements across Faridabad, Delhi NCR, Noida, Gurgaon/Gurugram, Mumbai, Pune, Ahmedabad, Hyderabad, Bengaluru/Bangalore, Chennai, Kolkata, Chandigarh, Ludhiana and other major Indian industrial markets.
1. What is Siemens 3WT9853-1JM00?
It is an F3 undervoltage release accessory for compatible Siemens 3WT8 circuit breakers.
2. What control voltage does it require?
The specified control supply voltage is 380...415 V AC.
3. What is the operating frequency?
The control supply frequency is 50/60 Hz.
4. What is the purpose of an undervoltage release?
An undervoltage release allows compatible circuit-breaker operation to respond to a loss or insufficient level of control voltage, depending on the breaker and control scheme.
5. Which circuit breaker is this accessory designed for?
The product is specified as an accessory for Siemens 3WT8 circuit breakers.
6. Where can this accessory be used?
It can be considered for industrial switchboards, power distribution systems, electrical panels, OEM assemblies and circuit-breaker control applications.
7. Is compatibility with the specific breaker important?
Yes. The exact 3WT8 breaker configuration and accessory position should be verified before ordering and installation.
8. What should be checked before installation?
Verify the breaker compatibility, F3 accessory position, 380...415 V AC control voltage, 50/60 Hz supply and applicable Siemens installation instructions.
| Specification | Details |
|---|---|
| Product Name | Under Voltage Release Instantaneous |
| Manufacturer | Siemens |
| Brand Series | SENTRON |
| Model Number | 3WT9853-1JM00 |
| Product Type | Under Voltage Release (UVR) |
| Accessory Designation | F3 Under Voltage Release |
| Compatible Breaker Series | Siemens 3WT8 Air Circuit Breakers |
| Rated Control Supply Voltage | 380–415V AC |
| Frequency | 50/60Hz |
| Operating Function | Instantaneous Tripping |
| Application | Under Voltage Protection |
| Mounting Type | Breaker Accessory Mounting |
| Net Weight | Approx. 0.8 kg |
| Industrial Application | Yes |
| Safety Function | Automatic Breaker Trip on Voltage Loss |
| Product Category | ACB Accessory |
| Brand | Siemens |
| Condition | New & Genuine Product |
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