Description
High-Quality BA157 Fast Recovery Rectifier Diode
The BA157 is a specialised silicon rectifier diode designed for applications where standard diodes are simply too slow. With a robust 1A forward current and a 400V rating, it is a mandatory part for any retro-electronics enthusiast’s spare parts bin.
Optimised for High-Frequency Switching Performance
The “Fast Recovery” designation means the BA157 can switch from a conducting to a non-conducting state with extreme speed. This characteristic is vital for modern and vintage power systems alike to prevent “switch-off” spikes and heat build-up. It is ideally suited for:
- DC-DC Converters: Enhancing the efficiency of internal voltage regulation.
- Switching Power Supplies: Reducing electrical noise and thermal stress.
- Inverter Circuits: Ensuring stable power delivery to logic components.
Critical for Sinclair ZX Spectrum Power Circuits
For those maintaining Sinclair hardware, the BA157 is a well-known replacement for the diodes at positions D15 and D16 on the 48K motherboard. These diodes are integral to the circuit that generates the -5V and +12V rails required by the lower RAM. Using a high-quality fast-recovery diode like the BA157 ensures these voltages remain stable, protecting your irreplaceable memory chips from corruption or failure.
Key Technical Specifications
- Maximum Average Forward Current: 1.0 amp.
- Peak Repetitive Reverse Voltage: 400 Volts.
- Package Type: DO-41 (Axial Lead).
- Fast Recovery Time: Designed for high-efficiency switching.
Durable Construction for Professional Restoration
Our BA157 diodes feature a rugged DO-41 plastic package and high-conductivity axial leads. They are built to withstand the high temperatures of professional desoldering and soldering processes, making them the perfect choice for the dense, ageing PCBs found in the Commodore 64, Amstrad CPC, and Sinclair families
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