Welwyn / TT Electronics High-Surge MELF Resistors (HSMW)
Welwyn / TT Electronics High-Surge MELF Resistors (HSMW) are engineered to deliver exceptional surge tolerance and controlled failure performance in compact, surface-mount designs. Combining wirewound construction with a robust MELF package, these resistors deliver reliable protection against high-energy transients while maintaining stable operation under continuous load. The HSMW product line from Welwyn / TT Electronics withstands fast inrush energies up to 6.5J and protects against lightning surge events up to 3.8kV (1.2/50µs). These resistors are designed for use in power conversion and mains-connected applications where reliability and safety are crucial.
Features
- High surge capability up to 6.5J for inrush and transient protection
- Compact SMD MELF package for space-constrained designs
- Flame-proof wirewound construction for enhanced safety
- Failsafe mains fusing at 120VRMS / 240VRMS
- UL 1412 recognized fusing performance (up to 220Ω)
- Fast, predictable fusing under low power overload conditions
- Specified performance for surge and transient events
Applications
- Power supplies and power conversion systems
- White goods and appliance control electronics
- Building automation and control systems
- Cordless and portable product charging platforms
Characteristics Curve
Additional Resources
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