ZQ50A Press Fit Diode 50A 400V Silicon Alternator Rectifier 2pcs
ZQ50A Press Fit Diode 50A 400V Silicon Alternator Rectifier 2pcs
ZQ50A Press Fit Silicon Diodes – 50A 400V Alternator Rectifier (Pack of 2)
Keep your alternators, generators, inverters, and welders running at peak performance with these heavy-duty ZQ50A Press Fit Silicon Diodes. Rated at 50A / 400V, this matched pair (1 red positive pole + 1 black negative pole) delivers reliable rectification and robust overcurrent handling for a wide range of mechanical and industrial equipment. Made in Mainland China.
Key Features
- High Overcurrent Capacity: Max forward current of 50A with a max forward voltage of only 1.1V — built for demanding electrical loads.
- International-Standard Vacuum + Hydrogen Welding: Seamless overcurrent performance using precision welding technology for consistent, long-lasting joints.
- Voltage Resistance up to 1200V: Minimum rated at 400V, every diode is verified for solid reverse-voltage endurance.
- Enamel Head Construction: Single-piece poured enamel body provides excellent heat dissipation, strong insulation, and safe operation.
- High-Quality Molybdenum Sheet Core: Thickened conductors combined with a molybdenum sheet core ensure fast heat transfer and maximum conductivity.
- Wide Operating Temperature Range: Rated from -65°C to +175°C, suitable for harsh industrial environments.
- Versatile Applications: Ideal for alternator rectifiers, inverters/converters, welders, stage lighting control systems, electric furnace heating circuits, and automatic control equipment.
Specifications
| Model | ZQ50A |
| Material | Enamel / Molybdenum Sheet |
| Color | Red (Positive / P), Black (Negative / N) |
| Rated Voltage | 400V |
| Max Reverse Current | 5.0A |
| Max Forward Voltage | 1.1V |
| Max Forward Current | 50A |
| Operating Temperature | -65°C to +175°C |
| Country of Origin | Mainland China |
Package Contents
- 2 × ZQ50A Automotive Silicon Diodes (1 Red + 1 Black)
Note: Screen brightness and monitor settings may cause slight color variation from actual product. Minor measurement tolerances of ±1–2mm may apply.
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Frequently Asked Questions
Q: What equipment are these ZQ50A press fit silicon diodes compatible with?
A: The ZQ50A press fit diodes are widely compatible with alternator rectifier assemblies, electric generators, inverters, converters, welders, stage lighting control systems, electric furnace heating circuits, and various automatic control equipment that require a 50A / 400V silicon rectifier diode.
Q: What is the difference between the red and black diodes in the pack?
A: The red diode represents the positive pole (P) and the black diode represents the negative pole (N). They work as a matched pair in a rectifier bridge, so both are needed for correct alternator or generator rectification.
Q: How are these diodes installed — do they require soldering?
A: These are press fit diodes, designed to be pressed directly into a compatible rectifier plate or heat sink housing without soldering. Their construction uses vacuum and hydrogen welding technology internally, so installation in the field is typically a firm press-fit into the designated rectifier housing slots.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.