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Green mushroom-head push button, 30 mm, epoxy-coated zinc bezel, plastic head, momentary action, 44 mm head diameter

SIEMENS

SIEMENS 52BM9W3K 30 mm 1NO Green Push Button Operator

SKU CH-9CZR-8C96D

30 mm mushroom-head push button with momentary action, 1NO contact rated 10A at 600V AC, green plastic head, IP66 and NEMA 4X sealing

  • Engine BrandSIEMENS
  • Engine Size30 mm
  • Momentary action gives precise control
  • 10 A at 600 V AC handles demanding circuits
  • Green 44 mm mushroom head ensures clear visibility
  • NEMA 4X and IP66 ratings resist harsh environments
  • Pressure-plate terminals simplify secure wiring

30 mm Green Mushroom-Head Push Button

The SIEMENS 52BM9W3K is a 30 mm mushroom-head push button operator designed for industrial control panels. It provides a single normally-open contact rated at 10A @ 600V AC with NEMA A600/P600 designation. The green plastic head measures 44 mm and uses momentary action for start or reset functions in machinery and process equipment.

IP66 and NEMA 4X Environmental Protection

The operator carries NEMA ratings 1, 3, 3R, 4, 4X, 12 and 13 plus IP ratings 10, 11, 14, 52, 54, 56 and 66. An epoxy-coated zinc die-cast bezel resists corrosion and wash-down conditions common in food, chemical and outdoor installations. Pressure-plate terminals simplify wiring without special tools.

1NO Contact Block Included

The unit ships with one normally-open contact block already fitted, so no separate contact purchase is required for basic start circuits. CSA, UL Listed and REACH compliance markings confirm suitability for North American and European regulatory environments. Legend plate is not applicable, keeping the front surface clean for custom labelling.

Highlights

  • Momentary action gives precise control
  • 10 A at 600 V AC handles demanding circuits
  • Green 44 mm mushroom head ensures clear visibility
  • NEMA 4X and IP66 ratings resist harsh environments
  • Pressure-plate terminals simplify secure wiring

Specifications

Engine BrandSIEMENS
Engine Size30 mm

Questions about this item

How do I mount the 30 mm operator and what is the common wiring mistake?

Install through a 30 mm panel cut-out, secure the epoxy coated zinc die cast bezel, then connect wires to the pressure plate terminals; the frequent error is leaving the pressure plate screws loose, which causes intermittent contact.

Which part will need replacement first in a dusty, wet environment?

The green plastic mushroom head and the 1NO contact block are the wear items; the head can crack from repeated impact and the contact block can degrade after many cycles, while the IP66 rated enclosure seals remain intact.

What thermal or electrical limit appears first during continuous 600 V AC operation?

The 10 A contact rating at 600 V AC is the limiting factor; sustained current above 10 A will overheat the pressure plate terminals before the NEMA A600/P600 or IP66 enclosure ratings are reached.

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