DC12V 3A PWM 4-Wire Temperature-Controlled Fan Speed Governor

Take precise control of your cooling setup with this compact DC12V 3A PWM 4-Wire Fan Speed Controller. Designed for computer builds, DIY electronics projects, and custom cooling systems, this mini temperature controller module automatically adjusts fan speed based on real-time temperature readings — keeping your components running efficiently without manual intervention.

Featuring an NTC temperature probe and a PWM (Pulse Width Modulation) output, this module intelligently regulates fan RPM in response to thermal changes. Its small footprint (48mm × 18mm × 9mm) makes it easy to integrate into tight enclosures, custom PC cases, or DIY projects where space is at a premium.

Key Features

PWM 4-Wire Control: Compatible with standard 4-wire PWM fans for smooth, precise speed regulation
DC 12V Operation: Recommended supply voltage of 12V (working range: 9V–14V)
Max Fan Current: Up to 0.8A (non-overloaded) — safe for most standard PC and cooling fans
NTC Temperature Probe: NTC 50K, B=3950, with a 50cm lead and XH-2P connector (2.54mm pin spacing)
Wide Operating Range: Functions reliably from -20°C to +60°C
Compact DIY Kit: Measures just 48mm × 18mm × 9mm — perfect for custom builds and tight spaces
Available in Packs: Choose 1pc, 5pcs, or 10pcs to suit your project scale

Specifications

Supply Voltage	Recommended 12V (9V–14V working range)
Max Current (Controller)	3A
Fan Current	Within 0.8A (not overloaded)
Operating Temperature	-20°C to +60°C
Temperature Probe	NTC 50K, B=3950, 50cm length
Probe Connector	XH-2P (2.54mm pin spacing)
Dimensions	48mm × 18mm × 9mm
Package	DIY Kit
Condition	New

What's in the Package

1× DC12V PWM 4-Wire Fan Speed Controller Module (select qty at checkout)
1× NTC Temperature Probe (50cm lead, XH-2P connector)

Perfect For

Custom PC builds and server cooling management
DIY electronics and maker projects
3D printer cooling systems
Enclosure ventilation control
Automotive and industrial fan regulation (within voltage range)

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Frequently Asked Questions

Q: What does this DC12V PWM 4-Wire Fan Speed Controller do?

A: This controller module monitors temperature via its NTC probe and automatically adjusts your PWM fan's speed accordingly. When temperatures rise, the fan speeds up; when things cool down, the fan slows — helping maintain optimal airflow efficiently and quietly in your computer or DIY project.

Q: What type of fans is this temperature controller compatible with?

A: This module is designed for standard 4-wire PWM fans with a current draw of up to 0.8A. It operates on DC 12V (9V–14V range), making it compatible with most common PC case fans, cooling fans, and similar 4-wire fan setups.

Q: How is the temperature probe connected to the module?

A: The included NTC 50K temperature probe connects via an XH-2P connector with a standard 2.54mm pin spacing. The probe has a 50cm lead, giving you flexibility in positioning the sensor close to the heat source you want to monitor.

Q: Can I buy this controller in bulk for multiple projects?

A: Yes! This controller is available in packs of 1, 5, or 10 pieces — simply select your preferred quantity at checkout. Buying in multipacks is ideal for large DIY builds, prototyping, or stocking up for future projects.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.