TMOV25SP385M LITTELFUSE Varistor (Other) In Stock
Littelfuse TMOV25SP385M is a radial-leaded metal oxide varistor (MOV) with 385 V RMS maximum operating voltage and 430 J energy absorption capacity. Thermally protected design triggers at overvoltage transients, providing reliable surge suppression for AC mains equipment.
- Manufacturer
- LITTELFUSE
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- TMOV25SP385M Datasheet PDF
- Category
- Varistor
- Price
- From $2.3590(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 385 V RMS maximum circuit voltage rating with 430 J energy absorption capacity for robust AC mains surge protection
- Integrated thermal protection mechanism disconnects the varistor when sustained overvoltage causes excessive heating, preventing fire hazards
- Radial through-hole leaded package (26.5 mm × 32.5 mm body) for easy PCB installation in industrial and consumer equipment
Applications
The TMOV25SP385M is designed for overvoltage transient protection in AC-powered equipment including industrial motor drives, HVAC systems, and power supplies connected to 240/277 V mains. Its thermal protection feature makes it ideal for applications requiring IEC 61051-2 and UL 1449 compliant surge protection without risk of catastrophic failure under sustained overvoltage. The radial leaded package suits through-hole PCB and chassis-mount designs in industrial and building automation systems.
Specifications
| Reach Compliance Code | Compliant |
| YTEOL | 7.75 |
| Circuit RMS Voltage-Max | 385V |
| Energy Absorbing Capacity-Max | 430J |
| JESD-609 Code | e3 |
| Mounting Feature | THROUGH HOLE MOUNT |
| Package Height | 32.5mm |
| Package Length | 26.5mm |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | Radial |
| Package Width | 13.7mm |
| Packing Method | BULK |
| Rated Temperature | 85°C |
| Reference Standard | CUL; TUV; UL |
| Resistor Type | VARISTOR |
| Surface Mount | NO |
| Technology | METAL OXIDE |
| Terminal Finish | TIN |
| Terminal Placement | RADIAL |
| Terminal Shape | WIRE |
| Working Voltage | 505V |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.40.40.00 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What voltage and energy rating makes TMOV25SP385M suitable for 240 V AC mains protection?
The TMOV25SP385M is rated for a maximum circuit RMS voltage of 385 V, which covers 240 V and 277 V single-phase AC mains with adequate margin. Its 430 J energy absorption capacity handles transient surges typically generated by lightning strikes and switching events on distribution-level AC circuits.
How does the thermal protection in TMOV25SP385M prevent fire risk under sustained overvoltage?
The TMOV25SP385M incorporates an internal thermal cutoff that disconnects the varistor element when junction temperature exceeds the thermal threshold, typically around 115°C. This prevents the device from entering thermal runaway during prolonged overvoltage events, meeting the fail-safe requirements of UL 1449 4th Edition for Type 1 and Type 2 surge protective devices.
What are the physical dimensions of the TMOV25SP385M and how do they influence PCB layout?
The TMOV25SP385M has a rectangular body measuring 26.5 mm in length and 32.5 mm in height, with radial through-hole leads. PCB designers must allocate a footprint with lead spacing matching the 25 mm body width and provide at least 5 mm of clearance around the body for thermal dissipation and creepage distance at 385 V RMS operating voltage.
When should TMOV25SP385M be selected over a standard MOV without thermal protection for industrial equipment?
The TMOV25SP385M should be chosen in applications where sustained overvoltage conditions can occur, such as industrial environments with poor power quality or frequent switching transients exceeding 10 ms duration. Standard MOVs without thermal protection can degrade and overheat under repeated surges above their energy rating, while the TMOV25SP385M's 430 J-rated thermal cutoff ensures the device disconnects safely rather than failing short-circuit.
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About LITTELFUSE
LITTELFUSE is a leading electronic component manufacturer. FindMyChip sources LITTELFUSE ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.3590 | $2.36 |
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