HW1B-M110W

1. Overview

The IDEC HW1B-M110W is a heavy-duty 22mm flush momentary pushbutton switch from IDEC's HW Series (also known as Izumi Denki / 和泉電機). It is a complete assembly — operator head plus integrated 1NO contact block — in white, designed for demanding industrial control panel applications. The HW Series is IDEC's flagship 22mm pushbutton line, characterized by its modular design with removable contact blocks, finger-safe SS terminals, and IP65 sealing. The HW1B-M110W is the white sibling in the HW1B-M110 color family that also includes black (-B), green (-G), red (-R), silver (-S), and yellow (-Y) variants.

2. User Sentiment

No forum or user review discussions specific to the HW1B-M110W were found in the findings. Market presence is strong: the part appears on dozens of global distributor platforms (USA, Europe, Japan, India, Vietnam, Indonesia, China, Korea, Thailand, Spain), indicating broad industrial acceptance. Radwell offers a 2-year warranty on reconditioned stock. One eBay buyer noted excellent customer service resolution when a wrong item was shipped. The product appears in spare-parts lists for Reiner Kettner LP-660E and LP-690E industrial stamping/marking machines in Germany, confirming reliable real-world fit for precision machinery.

3. Real-World Applications

The HW1B-M110W is used as a control panel pushbutton in factory automation, PLCs, and operator interfaces. It appears as a listed spare part (Druckschalter) in Reiner Kettner's LP-660E and LP-690E industrial stamping machines. AS-ONE/AXEL Japan recommends it for research and development, production, semiconductor, medical, nursing care, and food sanitation fields — consistent with the IP65 and heavy-duty rating. MRO distributors across Asia, Europe, and North America stock it, confirming broad cross-industry use.

4. Technical Specifications

• Type: Non-illuminated flush momentary pushbutton, complete unit (operator + 1NO contact block)
• Color: White (W suffix confirmed)
• Action: Momentary (spring-return)
• Contact Configuration: 1NO (1a in Japanese notation)
• Mounting Hole: Φ22.3mm (22mm series)
• Head Diameter: D29mm
• Bezel: Round, plastic
• Terminal Type: M3.5 screw-clamp (SS finger-safe spring-up terminals)
• Contact Material: Silver-clad (Ag)
• Contact Rating (Resistive): 10A at 110VAC / 6A at 220VAC / 10A at 24VDC / 2.2A at 110VDC / 1.1A at 220VDC
• Max Voltage: 600V (contacts)
• IP Rating: IP65 (front face); IP20 (terminal side)
• Depth Behind Panel: 49.4mm
• Body Diameter: φ23.6mm
• Operating Temperature: -25°C to +60°C
• Storage Temperature: -40°C to +80°C
• Mechanical Life: 5,000,000 operations (no load)
• Electrical Life: 500,000 operations
• Standards: UL 508, CSA C22.2 No. 14, EN 60947-1, EN 60947-5-1, CE, CCC, IEC
• NEMA: Heavy-duty construction consistent with NEMA 4X/13 (per HW Series family)
• Modular: Contact block is removable/replaceable

5. Ordering & Compatibility

Pricing ranges from approximately $11.74–$22.02 USD (single unit) depending on distributor: Jieleshun ~$11.74, Volition $15.69, MallAutomation $13.00, eBay secondary ~$12.75–$22.02. In Japan, price is approximately ¥550–¥700 per unit. Mouser part number is 199-HW1BM110W; DigiKey has listed it as HW1B-M110-W (with dashes) though availability may vary. The part number appears with and without dashes (HW1B-M110W = HW1B-M110-W = HW1BM110W — all equivalent). Compatible with IDEC FB-series resin control boxes (e.g., FB1W-HW1B-M110W-Z0, -Z1, -Z2, -Z3). Related color variants: HW1B-M110B (black), HW1B-M110G (green), HW1B-M110R (red), HW1B-M110S (silver/metallic), HW1B-M110Y (yellow). The MAU suffix variant (HW1B-M110W-MAU) is a panel-mount version for screw-terminal mounting; was discontinued on MISUMI Japan as of March 2022 (MISUMI listing only, not manufacturer discontinuation).

6. Known Issues

One eBay listing (id 2118174) incorrectly titled the part "White Illuminated Pushbutton Switch" — this is a mislabeling; all authoritative sources and IDEC's own catalog confirm HW1B-M110W is non-illuminated. No structural defects, reliability problems, or user complaints were found in the research data. Radwell and other surplus dealers note they are not authorized IDEC dealers and may carry older date-code stock.