SVP-912M 40A Voltage Protector – Over & Under Voltage Guard

SVP-912M 40A Adjustable Voltage Protector with Manual Switch

Keep your home appliances and electrical equipment safe from damaging voltage fluctuations with the SVP-912M Intelligent Voltage Protector. This compact, DIN-rail-mounted device automatically monitors your AC230V line and disconnects the circuit whenever voltage rises above or drops below your custom-set thresholds — then reconnects automatically once a stable voltage is detected. A built-in manual override switch gives you full control at any time.

Key Features

• Wide adjustable overvoltage threshold: Set between 230V–300V (factory default: 280V) to match your protection needs
• Wide adjustable undervoltage threshold: Set between 140V–210V (factory default: 160V)
• Self-resetting operation: Automatically reconnects power after a configurable recovery delay of 1–600 seconds (default: 5s)
• High 40A current rating: Suitable for whole-home or heavy-load circuit protection
• Compatible with 50/60Hz systems: Works across a broad range of international electrical grids
• 35mm DIN rail installation: Fast, tool-friendly mounting in standard electrical enclosures
• Ultra-low standby power consumption: ≤2W — always on guard without wasting energy
• Manual override switch: Instantly cut or restore power at any time without adjusting settings
• Compact "mini" form factor: Saves panel space while delivering robust protection

Technical Specifications

What's in the Box

• 1× SVP-912M Over/Under Voltage Protector

Please Note: Due to lighting and display differences, the actual product color may vary slightly from images. Please allow 1–3cm tolerance due to manual measurement.

For more information on electrical safety standards and best practices for home wiring protection, visit the U.S. Consumer Product Safety Commission – Electrical Safety.

Frequently Asked Questions

Q: What does the SVP-912M voltage protector do for my appliances?

A: The SVP-912M continuously monitors your AC230V line. If the voltage exceeds your set overvoltage threshold or drops below your undervoltage threshold, it instantly disconnects the circuit to protect connected appliances. Once voltage stabilizes, it automatically reconnects after your chosen recovery delay (1–600 seconds), so your devices are guarded without requiring manual intervention.

Q: How do I adjust the overvoltage and undervoltage thresholds?

A: The SVP-912M features onboard adjustment controls that let you set the overvoltage cutoff anywhere between 230V and 300V, and the undervoltage cutoff between 140V and 210V. The unit ships with factory defaults of 280V (over) and 160V (under), which suit most standard residential installations. Refer to the included instructions for step-by-step adjustment guidance.

Q: Is the SVP-912M suitable for whole-home protection?

A: Yes. With a 40A current rating and 35mm DIN rail mounting, the SVP-912M is designed to be installed in a main distribution board or consumer unit, making it ideal for protecting an entire home or office circuit rather than just individual devices.

Q: What does the manual switch do?

A: The integrated manual switch allows you to disconnect or reconnect the load circuit instantly, independent of the automatic voltage-sensing function. This is useful during maintenance, testing, or any situation where you need immediate manual control over your circuit.

Q: What recovery time setting should I use?

A: The default recovery time of 5 seconds works well for most applications. However, if your circuit powers sensitive equipment such as refrigerators or air conditioners — which benefit from a longer delay before restart — you can extend the recovery time up to 600 seconds to allow compressors and motors to fully equalize before power is restored.