PWM Fan Speed Controller 5V/12V 4-Pin Type-C Digital Temp Module

Smart PWM Fan Speed Controller — Precise Temperature-Based Fan Management

Take full control of your cooling setup with this intelligent 5V/12V 4-Pin PWM Fan Speed Controller. Powered via a convenient Type-C interface, this compact module automatically adjusts fan speed based on real-time temperature readings — keeping your PC, aquarium, greenhouse, or server room running at the ideal temperature without any manual intervention.

Key Features

• Plug-and-Play Type-C Power: Powered directly from a phone charger or power bank — no additional power source required.
• Smooth Linear PWM Control: Automatically adjusts the PWM duty cycle from 10% to 100% as temperature rises, delivering gradual and quiet fan speed transitions.
• HD Digital Display: One-click toggle between real-time temperature and current fan RPM readings for instant visibility of your system's status.
• Wide Compatibility: Works with all standard 4-wire PWM fans — ideal for PC builds, motor cooling, server rooms, greenhouses, and aquarium setups.
• NTC Temperature Probe Included: The NTC10K3950B probe (30cm cable) delivers accurate readings across a wide range of -25°C to 120°C.
• Encoder Adjustment: Simple, precise rotary encoder lets you fine-tune temperature thresholds and recovery ranges with ease.
• Custom Output Frequency: Default 25KHz PWM output frequency with support for custom settings to match your specific fan requirements.

Specifications

• Working Voltage: 5V (Type-C) / 12V (terminal)
• Maximum Output Current: 5A (Type-C 8W power supply)
• Output Frequency: 25KHz (customizable)
• Temperature Range: -25°C to 120°C
• Low Temp (L) Range: -25°C to 119°C
• High Temp (H) Range: -24°C to 120°C
• Recovery Range: 0–15°C
• Adjustment Method: Rotary Encoder
• Temperature Probe: NTC10K3950B, 30cm cable length
• Material: Plastic

Ideal Use Cases

This controller is perfectly suited for a wide range of environments:

• 🖥️ PC & Server Cooling — maintain optimal temperatures inside your computer case
• 🐠 Aquarium Fans — keep your fish tank at a stable, comfortable temperature
• 🌱 Greenhouse Ventilation — automate airflow to protect your plants
• ⚙️ Motor & Electronics Cooling — protect sensitive components from overheating

What's in the Box

• 1× Fan Speed Controller Module
• 1× NTC Temperature Probe (30cm)

Made in Mainland China.

For more information on electronics safety and thermal management best practices, visit the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: What fans are compatible with this PWM fan speed controller?

A: This module is compatible with standard 4-wire (4-pin) PWM fans commonly used in PC cases, servers, greenhouses, and aquarium setups. It supports both 5V and 12V fan configurations depending on the power source used.

Q: Do I need a special power supply to use this controller?

A: No special power supply is needed. The module is powered via a standard Type-C interface — any USB-C phone charger or power bank can supply power. For 12V operation, you can connect via the onboard terminal.

Q: How does the automatic temperature-based speed control work?

A: You set a low (L) and high (H) temperature threshold using the rotary encoder. When the ambient temperature — measured by the included NTC probe — rises above the low threshold, the controller begins linearly increasing the PWM duty cycle (fan speed) from 10% up to 100% as the temperature approaches the high threshold. This ensures smooth, quiet, and efficient cooling automation.

Q: Can I monitor fan speed and temperature at the same time?

A: The HD digital display shows either real-time temperature or current fan RPM. You can toggle between these two views with a single button press, giving you full visibility of your system's operating status at a glance.