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Transparent octal-base alternating relay with LED indicator and selector switch, 1.7 by 2.4 by 2.9 inches

Macromatic

Macromatic ARP120A3R Alternating Relay 120V AC DPDT 10A 240V AC 24V DC

SKU CH-G4RJ-Q4W08

Alternating relay with DPDT contacts rated 10 A at 240 V AC and 24 V DC, 120 V AC coil, LED status indicator, plug-in octal base

  • Product typeIndustrial Electrical Controls & Automation
  • Product colorTransparent
  • Alternates between two loads for balanced wear
  • 120 V AC coil voltage fits standard control circuits
  • DPDT contacts rated 10 A at 240 V AC and 24 V DC
  • LED shows which load will energise next
  • Plug-in octal base mounts in standard sockets

Industrial Alternating Relay for Load Management

The Macromatic ARP120A3R is a plug-in alternating relay designed for industrial electrical control panels. It operates on a 120V AC coil and uses a DPDT contact form rated at 10 A for both 240V AC and 24V DC circuits. The octal base with eight pins allows straightforward installation into compatible sockets. A built-in LED indicates which load is next to energise.

Selector Switch and Dual Load Settings

A selector switch on the body lets the operator choose between alternating mode, always energising load 1, or always energising load 2. This flexibility supports testing, maintenance or fixed-load scenarios without rewiring. The relay draws less than 3 VA, keeping control-circuit burden low. The transparent housing allows visual inspection of the internal mechanism.

10 A Contact Rating at 240V AC and 24V DC

The single specification that determines suitability is the 10 A contact rating at 240V AC and 24V DC. Builders needing higher current capacity or a different coil voltage must select another device. The plug-in mounting style requires a matching octal socket, which is not included. This relay is not for applications requiring timed delay or latching functions.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $50.99
Pricier than about 56% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameMACROMATIC
Product typeIndustrial Electrical Controls & Automation
Product colorTransparent

Questions about this item

Will the DPDT contacts rated for 10 A at 240 V AC need periodic replacement under normal alternating duty?

The contacts are rated for 10 A at 240 V AC and 10 A at 24 V DC; relay contact life depends on load type and switching frequency, so plan inspection intervals based on your application.

What limits continuous operation — coil heating or the 3 VA burden?

The coil draws less than 3 VA at 120 V AC; sustained operation is limited by coil temperature rise within the 2.9 in deep, 2.4 in high, 1.7 in wide plug-in housing.

Does the LED status indicator add noticeable heat or noise when the relay runs all day?

The LED only shows which load is next to energise and draws negligible power; the relay itself is silent solid-state switching with no moving parts to generate audible noise.

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