RHKW40-110S24

The RHKW40-110S24 provides extended hold-up time for EN 50155 compliance: Class S2 hold-up: 30ms at 24V input, 10ms at 14V input; Class S1 hold-up: 10ms at all input voltages; Extended hold-up option provides 100ms for critical applications. The hold-up time is achieved through: Large internal input capacitors; Efficient energy storage; Optimized control circuits that maintain regulation during interruptions. For applications requiring longer hold-up: External capacitors can be added to the input; Size capacitors based on required hold-up time and load current; Consider inrush current when selecting external capacitors. The converter meets the voltage interruption requirements of EN 50155 for all classes, ensuring continued operation during brief power interruptions common in railway applications.

For critical railway applications, verify hold-up time meets the required EN 50155 class (S1, S2, or S3).

The RHKW40-110S24 maintains high efficiency across the wide input range: At 24V input: 88% efficiency; At 48V input: 89% efficiency; At 72V input: 90% efficiency (peak); At 110V input: 89% efficiency; At 160V input: 87% efficiency. The efficiency curve is optimized for typical railway battery voltages (48V-110V). The high efficiency is maintained through: Synchronous rectification for reduced losses; Optimized magnetic components; Wide-range control circuits that adapt to input voltage. The efficiency remains above 87% across the entire input range, minimizing heat generation and enabling operation at high ambient temperatures. For thermal calculations, use the efficiency at your nominal operating voltage.

For thermal design, use the efficiency at your nominal battery voltage to calculate power dissipation.

The RHKW40-110S24 includes comprehensive surge protection per EN 50155: 1.4x nominal voltage for 1 second (154V for 110V nominal); 1.5x nominal voltage for 100ms (165V for 110V nominal); Load dump protection up to 200V for 1 second; Surge protection devices limit voltage to safe levels. The protection circuits include: Input TVS diodes for fast transients; Active clamp circuits for sustained overvoltage; Isolation barriers rated for high-voltage transients; Thermal protection for sustained overloads. These protections are critical for railway applications where: Circuit breaker operations create voltage spikes; Battery switching generates transients; Regenerative braking causes voltage rises. The converter continues normal operation after transients and automatically recovers from protection events.

For applications with severe transients, verify surge ratings meet your specific requirements.

The RHKW40-110S24 is designed for high reliability in railway applications: MTBF is 800,000 hours at 40°C ambient per MIL-HDBK-217F; At 25°C, MTBF exceeds 1,000,000 hours; Reliability is achieved through: Conservative component derating for long life; High-quality industrial-grade components; 100% burn-in testing to eliminate early failures; Robust thermal design for high-temperature operation. For railway applications, reliability is critical due to: High cost of service access on rolling stock; Safety implications of power supply failure; Warranty and maintenance cost considerations. P-Duke provides detailed reliability reports including FIT rates and failure mode analysis. The high MTBF rating reflects the conservative design approach and extensive testing that railway products undergo.

For reliability-critical applications, request detailed MTBF calculations and reliability data.

The RHKW40-110S24 provides reinforced isolation for railway safety: Isolation test voltage is 4000V AC for 60 seconds; Working voltage is 1000V AC continuous; Reinforced insulation rating per IEC 62368-1; Isolation resistance exceeds 100M ohms at 500V DC. The reinforced isolation provides: Safety protection equivalent to double insulation; Suitable for equipment with accessible conductive parts; Meets requirements for high-voltage battery systems; Long-term reliability in humid environments. The isolation barrier is tested 100% in production with high-potential testing. The 4000V rating provides substantial margin for railway applications where: Battery systems can have high voltages (up to 110V); Transient overvoltages occur during switching; Safety requirements are stringent. The isolation design ensures safe operation throughout the product lifetime.

For safety-critical railway applications, verify isolation ratings meet your specific system requirements.

P-Duke provides comprehensive documentation for railway certification: EN 50155 test reports covering all requirements; Fire safety test reports per EN 45545-2; Shock and vibration test reports per EN 61373; EMC test reports per EN 50121-3-2; Safety test reports per IEC 62368-1; MTBF analysis and reliability predictions; Material declarations and RoHS/REACH compliance. The documentation package includes: Type test certificates from accredited laboratories; Factory production control documentation; Quality management system certificates; Declaration of conformity for CE marking. For specific projects, P-Duke can provide: Customer-specific test reports; Witness testing at accredited laboratories; Technical support for certification submissions. This comprehensive documentation simplifies the approval process for railway system integrators and operators.

For railway projects, request complete certification documentation to support your system approval process.