PR172 module: board with six screw terminals on a large heat sink, front view

Linear 24 V dimmer without PWM, low-noise

Article number PR172s01

The PR172s01 dims lighting, including LED lamps, with a true linear regulator instead of pulse-width modulation (PWM). It is controlled with a two-wire potentiometer between terminals 5 and 6, so the lighting dims steplessly. The lamp is connected to terminal 3 (plus) and terminal 4 (minus); the output delivers up to 4 A at 24 V DC.

Supply 24 V DC ±20 %
Input two-wire potentiometer between terminals 5 and 6
Output linear regulation, without PWM; lamp on terminals 3 (plus) and 4 (minus)

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Specifications

Specifications
Supply	24 V DC ±20 %
Input	Two-wire potentiometer between terminals 5 and 6
Output	Linear regulation, without PWM; lamp on terminals 3 (plus) and 4 (minus)
Output current	4 A max. at 24 V DC
Dimensions	115 x 120 x 68 mm

Connections

Connections
Terminal	Function
Terminal 1	Supply +24 V
Terminal 2	Supply 0 V
Terminal 3	Lamp plus
Terminal 4	Lamp minus
Terminal 5	Potentiometer (two-wire, between terminals 5 and 6)
Terminal 6	Potentiometer (two-wire, between terminals 5 and 6)

Datasheet (PDF)PDF, 124 kB

Application

Dimming lighting, including LED, where the dimmer must not cause interference
Environments with strict electromagnetic compatibility (EMC) requirements

PR172: linear, without PWM

The PR172 modules regulate linearly, without PWM and without a switching regulator. They therefore cause no electromagnetic interference, which makes them suitable for environments with strict electromagnetic compatibility (EMC) requirements. A linear regulator gets warm under heavy load: install the module in a well-ventilated space. Supply 24 V DC (±20 %); dimensions 115 x 120 x 68 mm.

More about the PR172 series