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Small rectangular PCB with a 300mm temperature probe attached

CAFELE

CAFELE DC 12V 1A Fan Speed Controller with Sensor 300mm

SKU CH-GDNF-WTBS7

Automatically adjusts 12 V fan speed from 30 °C using a 300 mm sealed probe, handling 2, 3 or 4-wire fans up to 1 A

  • TypeCase Fan
  • Automatic stepless speed control adjusts fan RPM to ambient temperature
  • Supports 2, 3 and 4-wire 12 V fans up to 1 A total current
  • Epoxy-sealed sensor probe withstands 110 °C and reaches 300 mm
  • Dual-mode operation with fixed 30 °C start or adjustable threshold
  • Power anti-reverse protection prevents board damage if polarity is reversed

Automatic Fan Speed Control

The CAFELE DC 12V 1A controller adjusts fan speed automatically based on ambient temperature. Higher temperatures trigger faster fan speeds while lower temperatures can stop the fan entirely. It supports 2-wire, 3-wire and 4-wire fans operating within 12V and a combined current draw under 1A. The unit includes power anti-reverse protection to prevent damage from incorrect wiring.

Sustained Load Behaviour

Under continuous operation the controller provides stepless speed regulation without manual intervention. The epoxy-sealed temperature probe withstands up to 110 degrees and is waterproof for reliable readings in humid environments. A 300mm sensor cable allows flexible placement near the heat source. Dual operating modes let you choose a fixed 30-degree start threshold or adjust the trigger point via the onboard potentiometer.

Upgrade Context

This controller replaces basic constant-speed fan wiring or manual switches that cannot react to temperature changes. The automatic response is worthwhile when you want noise reduction during idle periods and increased airflow under load without software configuration. It is not suited for builds requiring multiple high-current fans exceeding the 1A total limit or for systems needing software-based fan curves and monitoring.

Highlights

  • Automatic stepless speed control adjusts fan RPM to ambient temperature
  • Supports 2, 3 and 4-wire 12 V fans up to 1 A total current
  • Epoxy-sealed sensor probe withstands 110 °C and reaches 300 mm
  • Dual-mode operation with fixed 30 °C start or adjustable threshold
  • Power anti-reverse protection prevents board damage if polarity is reversed

Specifications

TypeCase Fan

Questions about this item

Does the 11.5 inch sensor cable run hot when the controller drives a 1 A load all day?

The epoxy-sealed probe is rated to 110 degrees and the controller includes power anti-reverse protection, so the sensor cable stays cool even at full 1 A output.

What fan connectors must I already have for this governor to work?

Any 2-wire, 3-wire or 4-wire 12 V fan — just connect the fan's power wires; the board handles PWM or brushless types automatically.

Will the controller start my older 3-wire fan at the fixed 30 degree threshold without any jumper changes?

Yes — set the mode switch to F for fixed mode and the fan will spin up automatically once the probe reads 30 degrees.

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