Pioneer Magnetics PM3328BP-6 DC-DC Converter
The Pioneer Magnetics PM3328BP-6 is a high-reliability DC-DC converter module designed for industrial, telecommunications, and military applications. It converts a nominal 24V DC input (18-36V range) to a regulated 28V DC output with a continuous current rating of 6A (168W). The module features high efficiency, low ripple, and comprehensive protection circuits, making it suitable for powering sensitive electronics in harsh environments.
Technical Specifications
Input Voltage Range: 18-36 V DC (nominal 24 V)
Output Voltage: 28 V DC ±1%
Output Current: 6 A continuous
Output Power: 168 W
Efficiency: >88% at full load
Ripple & Noise:<50 mV peak-to-peak
Line Regulation: ±0.2%
Load Regulation: ±0.5%
Protections: Overvoltage, overcurrent, short circuit, overtemperature
Operating Temperature: -20°C to +85°C (derating above 70°C)
Storage Temperature: -40°C to +105°C
Dimensions: 127 × 76 × 25 mm
Mounting: Chassis mount with screw terminals
Certifications: CE, UL 60950-1, RoHS
Design and Construction
The PM3328BP-6 is housed in a rugged aluminum enclosure with integral cooling fins, allowing natural convection cooling. The module uses high-quality components rated for industrial temperature ranges and includes a built-in EMI filter to reduce conducted emissions. The input and output terminals are heavy-duty screw-type for secure field wiring. An optional heatsink is available for operation above 70°C ambient.
Protection and Reliability
The converter includes multiple protection features: input overvoltage clamp (40V), output overvoltage crowbar (32V), current limiting with hiccup mode, and thermal shutdown with auto-recovery. The mean time between failures (MTBF) exceeds 500,000 hours at 25°C per MIL-HDBK-217. The unit is designed for continuous operation in vibration-prone environments.
Application Domains
This power module is used in telecom base stations, railway signaling, industrial control cabinets, and military communication equipment. It is ideal for converting 24V battery power to 28V for legacy equipment or for powering 28V avionics from a 24V source.
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