TMOV20RP300E LITTELFUSE Varistor (Other) In Stock
The TMOV20RP300E from Littelfuse is a thermally protected metal oxide varistor (TMOV) rated at 300 V AC RMS with 250 J energy absorption capacity in a 23 x 28 mm radial leaded disk package. It combines surge suppression with an integrated thermal cutoff for safer AC mains overvoltage protection in industrial and appliance power supplies.
- Manufacturer
- LITTELFUSE
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- TMOV20RP300E Datasheet PDF
- Category
- Varistor
- Price
- From $0.5815(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
- 300 V AC RMS maximum continuous voltage rating for direct protection on mains power inputs
- 250 J energy absorption capacity handling repeated surge events such as IEC 61000-4-5 8/20 µs waveforms
- Integrated thermal cutoff (TMOV) disconnects the varistor if sustained overvoltage causes thermal runaway
- Radial leaded through-hole 23 x 28 mm disk package for straightforward PCB or panel wiring installation
- REACH-compliant and halogen-free construction meeting global environmental regulations
Applications
The TMOV20RP300E is used for primary surge protection on 230 V AC mains inputs in switching power supplies, industrial motor drives, and home appliances where repeated transient exposure could otherwise degrade a standard MOV without thermal protection. Its integrated thermal cutoff prevents fire hazard if the varistor is continuously stressed beyond its energy rating, a safety feature mandated in many IEC 60335 and UL 60950 compliant designs. The 250 J energy rating also makes it suitable for protecting three-phase 230 V line inputs in industrial automation panels.
Specifications
| Reach Compliance Code | Compliant |
| YTEOL | 7.8 |
| Circuit RMS Voltage-Max | 300V |
| Energy Absorbing Capacity-Max | 250J |
| JESD-609 Code | e3 |
| Mounting Feature | THROUGH HOLE MOUNT |
| Package Height | 28mm |
| Package Length | 23mm |
| Package Shape | DISK PACKAGE |
| Package Style | Radial |
| Package Width | 11mm |
| Packing Method | BULK |
| Rated Temperature | 85°C |
| Reference Standard | CUL; IECQ; TUV; UL |
| Resistor Type | VARISTOR |
| Surface Mount | NO |
| Technology | METAL OXIDE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Placement | RADIAL |
| Terminal Shape | WIRE |
| Working Voltage | 385V |
| 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 ratings define the TMOV20RP300E's surge protection capability?
The TMOV20RP300E is rated at 300 V AC RMS continuous voltage and can absorb up to 250 J of surge energy per IEC 61000-4-5 test conditions. This combination allows it to handle multiple lightning-induced transients on a 230 V mains input without degradation under normal operating conditions.
How does the thermal cutoff in TMOV20RP300E improve safety compared to a standard MOV?
Unlike a standard metal oxide varistor, the TMOV20RP300E integrates a thermal fuse that disconnects the varistor element when body temperature exceeds approximately 130°C. This prevents sustained power dissipation from causing casing rupture or fire, a risk that standard 300 V MOVs face when subjected to repeated surges, and is required by IEC 60335 and UL 508A safety standards.
For which AC mains protection scenarios should a designer choose TMOV20RP300E over a lower-rated varistor?
A designer should select the TMOV20RP300E for equipment connected to 230 V mains supplies where IEC 61000-4-5 Level 3 (2 kV) surge compliance is required and the application may experience repeated transients, such as industrial motor start surges or outdoor grid connections. The 250 J absorption capacity handles at least 10 consecutive 2 kV, 8/20 µs surge pulses that a smaller 100 J varistor would fail to survive.
What physical format does the TMOV20RP300E use, and how does it mount on a PCB or panel?
The TMOV20RP300E uses a radial leaded disk package measuring 23 mm in diameter and 28 mm in height, with through-hole leads spaced for standard PCB footprints. Its radial lead format is compatible with both automated through-hole insertion equipment and manual wiring to screw terminal blocks in panel-mount power supply designs.
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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+ | $0.5815 | $0.58 |
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