HW1B-M101R

1. Overview

The IDEC HW1B-M101R is a φ22mm (22mm panel cutout) heavy-duty momentary push button switch from IDEC's HW Series (HWシリーズ), also known as the "和泉電気 / Izumi Electric" HW line. It features a flat (flush) round red actuator, a single normally-closed (1b / 1NC) contact configuration, spring return (momentary) operation, and a black bezel. It is manufactured in Japan and targeted at industrial panel control applications. The HW Series is IDEC's flagship 22mm heavy-duty push button family, built to withstand demanding factory environments. It is widely stocked by Japanese FA/MRO distributors (MonoTaro, ASKUL, Misumi, Trusco/Orange Book) and international distributors (RS Components UK/France/Belgium, iLec Systems UK).

2. User Sentiment

No direct end-user reviews were extractable from the sources fetched. However, distributor listing patterns suggest strong, consistent demand: the part is actively stocked across multiple Japanese MRO platforms (MonoTaro, ASKUL, Orange Book/Trusco) and UK/European channels (RS Components, iLec Systems), which indicates reliable supply and sustained usage in industrial installations. One listing note mentions the product is available as long-term warehouse clearance stock with minor cosmetic wear, suggesting it has been in continuous production and inventory over an extended period. The widespread multi-channel availability across Japan, APAC, and Europe reflects positive market acceptance.

3. Real-World Applications

The HW1B-M101R is used as a panel-mounted control element in industrial machinery and automation panels. Typical applications include:

• Machine control panels (start/stop, reset, E-stop complement circuits)
• Factory automation (FA) control stations
• Control cabinets in manufacturing, conveyor, and process control environments
• Any application requiring a robust momentary normally-closed (NC) switching input

The 1b (NC) contact type is commonly used for stop circuits, safety interlocks, or as one contact in a dual-contact safety relay configuration. The EN418-compliant design of the broader HW series supports emergency-stop circuit integration.

4. Technical Specifications

• Type: Momentary (spring return) push button switch, flush round actuator
• Series: IDEC HW Series (HWシリーズ), φ22 heavy-duty
• Part Number: HW1B-M101R
• Actuator Color: Red
• Actuator Shape: Flat / Flush round
• Bezel Color: Black
• Contact Configuration: 1b (1NC — one normally closed contact)
• Contact Material: Silver
• Electrical Rating: 600V / 10A; operating range 5mA at 3V AC/DC to 10A at 120V AC
• Panel Cutout: φ22mm (22.3–22.5mm)
• Head Diameter: 29.4mm
• Depth Behind Panel: ~49.4–62.4mm (varies by source; 49.4mm per UK listing, 62.4mm per ASKUL)
• Weight: ~36–68g (36g per Orange Book; 68g per iLec)
• Terminal Type: M3.5 screw terminals (push-in terminal option also available)
• Terminal Compatibility: Ring, fork, ferrule terminals or bare wires
• Protection Rating: IP65 (IEC 60529); UL Type 4X
• Certifications: UL listed, CSA certified, TÜV approved, CE marked, CCC, RoHS2 compliant, EN standard compliance
• Emergency Stop Compliance: EN418 (for applicable variants in HW series)
• Special Features: Finger protection structure SS terminals; self-cleaning rolling contacts with rake-processed contact points; water and oil resistant; super bright LED illumination option available
• Country of Origin: Japan

5. Ordering & Compatibility

The HW1B-M101R is available from a wide range of distributors globally. Japanese pricing ranges from approximately ¥550–¥700 (incl. tax) per unit at MRO/FA suppliers (adwecs.jp, ASKUL, Orange Book). UK pricing is approximately £11.73–£13.80 ex. VAT (iLec Systems), with a minimum order quantity of 10 units at some UK distributors. French RS Components lists it at €16.05 ex. VAT with stock for 3-day delivery.

The part number suffix encodes: HW = series, 1B = contact block type (1NC), M = momentary, 101 = 1NC contact element, R = Red actuator. Compatible contact blocks (1a, 2a, 1a1b, etc.) and illuminated variants exist within the HW series. The switch is compatible with standard φ22mm IEC panel accessories from IDEC's HW product family.

6. Known Issues

No significant field issues or known defects reported across the fetched sources. One distributor note (adwecs.jp) flagged that units from long-term warehouse stock may show minor cosmetic wear to packaging or the unit itself, and that returns/exchanges are not permitted for such clearance items. Depth-behind-panel dimensions vary across sources (49.4mm vs. 62.4mm), which may reflect inclusion of the contact block assembly vs. the head unit only — confirm exact assembly depth before panel design.