HW1B-M110Y

1. Overview

The IDEC HW1B-M110Y is a 22mm heavy-duty industrial pushbutton from IDEC's HW Series (also sold as "HW 22mm Heavy-Duty" globally). It is a complete assembled unit — the part number encodes the full configuration: HW1B = HW series 22mm flush (non-illuminated) operator body; M = momentary action; 1 = one contact block; 1 = 1 Normally Open (1a/1NO); 0 = 0 Normally Closed; Y = Yellow. The unit ships ready to mount with contact block included — this is confirmed by Radwell (describes as "ASSEMBLY"), DigiKey (complete unit), and Moglix (finger-safe contact block included). Multiple IDEC regional sites (APAC, USA, India, Japan, China) list this as a current, active product in the HW 22mm Heavy-Duty family.

2. User Sentiment

No forum reviews or head-to-head comparisons were found in the findings for this specific part. The HW series is widely stocked across Japanese industrial supply chains (Monotaro, Askul, Misumi, Marutsu, AS ONE/AXEL, Orange Book/TRUSCO) and distributed globally (DigiKey, Mouser, RS Components, Radwell), which reflects strong market acceptance for industrial automation panels. The product appears in both surplus/clearance channels and new-in-box from authorized distributors, suggesting long-standing production. One Japanese seller noted a "specification change in October 2016 for lever stopper shape," indicating IDEC has made minor iterative improvements over time.

3. Real-World Applications

The HW1B-M110Y is used in industrial control panels, factory automation equipment, and machine tool interfaces wherever a heavy-duty 22mm momentary start/jog/confirm pushbutton is needed. Yellow buttons in IEC/ANSI convention are typically used for cautionary functions — return to normal, restart after fault, or jog. The switch is sold across Asia (Japan, China, Thailand, Vietnam, India), Europe, and North America for industrial panel builders. The IDEC HW series includes illuminated pushbuttons, pilot lights, selector switches, and E-stop switches, so HW1B-M110Y integrates with a broader panel assembly ecosystem.

4. Technical Specifications

• Type: Complete assembled unit — non-illuminated flush momentary pushbutton with 1NO contact block included (SPST-NO)
• Color: Yellow (Y suffix) — button cap and bezel
• Action: Momentary (spring-return; button returns to up position on release)
• Contact Configuration: 1NO (1a, SPST-NO; 0 NC contacts) — CONFIRMED from DigiKey, Marutsu, Moglix, Lectrocomponents, Radwell, and multiple Japanese listings; catalog entry "1NO" is CORRECT
• Mounting Hole: 22mm (22.30mm panel cutout)
• Bezel: Round plastic bezel (black body); contact blocks finger-safe (IP20 on terminals)
• IP Rating: IP65 (dust-tight, water-resistant front face) — confirmed DigiKey, Moglix, Legend Electrical Sales
• Insulation Voltage: 600V rated; 4kV impulse withstanding voltage
• Dielectric Strength: 2500V AC (between live and dead metal parts)
• Contact Rating: AC 110V / 10A; DC 24V / 8A (resistive load)
• Thermal Current: 10A rated
• Terminal Type: M3.5 screw terminal (finger-safe "SS terminal" / spring-up contact blocks)
• Contact Material: Silver-clad (Ag) with rolling/raked contact for self-cleaning
• Mechanical Life: 5,000,000 operations minimum
• Operating Temperature: -25°C to +60°C (no icing); Storage: -40°C to +80°C
• Standards: IEC 60947-5-1; EN60947-5-5; SEMI S2; UL, CSA (cULus), CCC (China), TÜV approvals
• Body Diameter: φ23.6mm outer; 22mm mounting hole

5. Ordering & Compatibility

Pricing: ~$17–$21 USD (DigiKey $20.88, RSP Supply $17.36 sale, Mouser ~$20.76 EUR). In Japan: ¥549–¥891 depending on retailer. Singapore: SGD $19.20. Lead times vary: DigiKey lists 27-week manufacturer lead time; RS/Radwell/RSP typically in stock for same-day or next-day ship. The base part (HW1B-M110Y) is the "JP Version" — the updated 2025 catalog model is HW1B-M110Y-MAU (¥1,210 list). Contact blocks in the HW series are locking-lever removable, enabling field reconfiguration. Related color variants: HW1B-M110B (Blue), HW1B-M110G (Green), HW1B-M110R (Red), HW1B-M110S (?) — all same contact config. Mouser part number: 199-HW1BM110Y. DigiKey PN: 1885-HW1B-M110Y-ND. RS stock: 70915245. TRUSCO order code: 850-0175.

6. Known Issues

One Taiwanese retailer (100y.com.tw) has misclassified HW1B-M110Y as a "φ22mm 緊急停止開關1NC 黃色" (emergency stop, 1NC) — this is a mislabeling error; all authoritative sources confirm 1NO momentary pushbutton. A minor spec change occurred in October 2016 (lever stopper shape revision, noted by Marutsu Japan) — functionally equivalent but dimensional details of the lever stopper differ between pre/post-2016 units. No other significant field reliability issues reported across sources.