Upgrade your classic car’s unreliable bi-metal voltage stabiliser with the plugpal 10V Solid State Voltage Stabiliser, engineered specifically for negative earth vehicles.  Designed as a modern, reliable replacement for original contact breaker stabilisers used in 1950s, 60s and 70s vehicles, this unit ensures accurate and stable gauge readings every time.

Perfect for classic models from brands including:

• MG
• Triumph
• Jaguar
• Lotus
• Rolls-Royce
• Daimler
• Austin
• Morris
• Ford

…and many other classic British, European and American vehicles.

Why Upgrade to a Solid State Voltage Stabiliser?

Original mechanical stabilisers rely on bi-metallic contact breakers that fluctuate with temperature and wear over time. The plugpal solid state stabiliser uses modern semi-conductor technology to deliver:

• Stable, constant 10V output
• Accurate fuel and temperature gauge readings
• Consistent performance regardless of engine revs or electrical load
• Improved long-term reliability over original mechanical units

Keep your classic gauges working as accurately as possible while preserving originality.

Designed for Easy Installation

• Three-wire setup: 12V input (red), 10V output (green), ground (black)
• Black wire connects to chassis ground via ring terminal
• Red wire connects to the original ‘B’ terminal feed
• Green wire connects to the original ‘I’ terminal (10V gauge feed)
• Supplied with:
  • Male 6.3mm spade terminal on +12V input
  • Female spade terminal on +10V output
  • Adapter lead included if male output connection is required

If you require alternative terminal configurations, custom options may be available on request.

Technical Specifications

• Output Voltage: 10V DC (regulated, +-0.5V)
• Vehicle Type: Negative earth systems only
• Output Current Range: 5mA – 1A
• Components: Constructed with a Texas Instruments LM2940T-10 voltage regulator and the manufacturer recommended capacitors on a custom circuit board
• Recommended Load: Up to two gauges (fuel and temperature)
• Construction: Vented metal casing acting as heatsink with regulator mounted on thermal paste 
• Waterproofing: Adhesive-lined heat shrink protection
• Connections: Professionally crimped (not soldered) to prevent vibration-related stress fractures
• Wiring length: For flexible positioning, approx 100mm

Engineered specifically for the harsh vibration environment of automotive applications.

Direct Replacement for Original Units

Compatible with stabilisers carrying part numbers:

• BR1307-00 NEG
• BHA4602
• 148876A
• BMK1539A

Ideal for classic car restoration, maintenance, and reliability upgrades.

Important Notes

• This model outputs 10V.
• Designed for negative earth vehicles only (not suitable for positive earth systems).
• If being installed not using the original loom stabiliser connections, a fused 12v supply is advised.

The Ideal Classic Car Voltage Regulator Upgrade

Whether you're restoring a vintage British classic or simply improving gauge accuracy, the plugpal 10V Solid State Voltage Stabiliser provides a dependable, modern solution while maintaining period-correct functionality.

Upgrade your classic car’s fuel and temperature gauge performance today with reliable solid state regulation.