Product Overview
Murrelektronik 18mm Field-Attachable Solenoid Plug with Surge Suppression
Condition
Unused new old stock in original labeled packaging. Includes center mounting screw and square profile sealing gasket. Markings legible: MURR ELEKTRONIK 7000-29021 3129020 24 V AC/DC - 4A Made In China with printed wiring schematic.
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Product Overview
Murrelektronik 7000-29021-0000000 (also designated 3129020) is a DIN 43650 Form A field-wireable valve connector engineered for solenoid valves, pressure switches, and industrial actuators. Featuring standard 18 mm contact spacing, it integrates a built-in yellow LED for local power indication and a bidirectional Zener diode circuit to clamp inductive voltage spikes when coils de-energize.
Key Features
- Standard Form A construction with 18 mm pin spacing (2 poles plus protective earth)
- Rated for 24 V AC/DC operation at up to 4 A continuous operating current
- Integrated yellow LED power status indicator
- Built-in bidirectional Zener diode surge suppression
- Field-wireable screw clamp terminals accommodate conductors up to 1.5 mm²
- PG 9 cable gland entry sealing outer cable diameters from 6 mm to 8 mm
- IP65 environmental protection when mated and torqued with the included gasket
Applications
- Wiring 24V pneumatic and hydraulic directional control valves on production machinery
- Replacing damaged DIN 43650 Form A plugs on manifold valve stacks
- Protecting PLC digital output modules from solenoid inductive kickback
- Custom fluid-power automation projects, test benches, and maker robotics rigs
Frequently Asked Questions
What pin spacing does this Form A connector use?
Form A connectors have 18 mm spacing between the parallel flat contact pins.
Does the surge suppression circuit require specific DC polarity?
The suppression network uses a bidirectional Zener diode arrangement rated for 24 V AC or DC, functioning with either AC power or standard DC polarity across terminals 1 and 2. Ground connects to the dedicated protective earth terminal.
Are the mounting screw and gasket included?
Yes, both the central fixing screw and the flat profile rubber sealing gasket are included.
Is Murr Elektronik part number 7000-29021 the same as 3129020?
Yes. Murrelektronik uses both the 7000-29021-0000000 article number and legacy code 3129020 for this identical Form A 24V LED and Z-diode plug.
The humble Form A plug has kept fluid power moving since the DIN standard first took hold. Wire it in, tighten the gland, and let the Zener diode take the beating so your control board never has to.
