Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Manufacturer | Littelfuse |
| Exact MPN | TMOV14RP300E |
| Product Category | Varistors, MOVs |
| Package | Radial leaded, P=7.5 mm |
| Packing | 500 pcs/box |
| Varistor Voltage | 470V |
| Clamping Voltage | 775V |
| DC Working Voltage | 385V |
| AC Working Voltage | 300V |
Product Overview
Littelfuse TMOV thermally protected radial-leaded MOV; integrated thermal element disconnects the MOV under abnormal overheating conditions. The exact MPN appears in Littelfuse application material, while the retrieved product page confirms the TMOV family function.
Integrated thermal protection addresses MOV overheating under abnormal limited-current overvoltage; it does not replace upstream overcurrent protection or appropriate enclosure/fire design.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Littelfuse |
| Exact MPN | TMOV14RP300E |
| Functional Category | Varistors, MOVs |
| Package | Radial leaded, P=7.5 mm |
| Packing | 500 pcs/box |
| Source Catalog ID | C1527424 |
| Varistor Voltage | 470V |
| Clamping Voltage | 775V |
| DC Working Voltage | 385V |
| AC Working Voltage | 300V |
Selection Notes
MCOV; thermal protection; surge current/energy; clamp voltage; two-lead versus monitored three-lead construction.
Keep continuous operating voltage below the applicable rating and check varistor/clamping levels against both the protected node and expected surge.
Manufacturer Decision-Relevant Notes
VM(AC) 300 V RMS; surge energy 125 J; ITM 6,000 A for one 8/20-µs pulse and 4,500 A for two pulses; VN(DC) 423–517 V at 1 mA; VC 775 V; typical capacitance 400 pF; operating temperature -55 to +85 °C.
Design Considerations
- Verify 300-V MCOV is suitable for the actual AC line and temporary overvoltages; compare 775-V clamp with insulation and protected electronics; coordinate surge energy/current with the expected standard waveform and repetitions; verify thermal-disconnect interrupt behavior and fuse coordination; confirm lead spacing and creepage for the intended mains category.
Application Fit
SPD products, UPS, AC panel protection, AC-line power supplies, surge strips, inverters, AC meters, AC/DC supplies and GFCI equipment.
Exact Variant and Procurement Notes
14 = 14-mm disc; R = round ceramic shape; P = series designator; 300 = 300-V AC class; E = two-lead TMOV without indicator lead.
Manufacturer Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. Physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
For TMOV14RP300E quotation, provide the exact MPN, required quantity, destination, target Date Code if applicable, and any inspection or testing requirements.
