HW1B-V4F01-R

1. Overview

The IDEC HW1B-V4F01-R is a 22mm panel-mount emergency stop pushbutton from IDEC Corporation (和泉電気株式会社/Izumi Electric, Japan). It belongs to the HW Series of heavy-duty 22mm IEC-style pushbuttons, which IDEC markets as "the best engineered switch in the world." The HW series features a modular design with removable contact blocks, plastic or metal bezel options, and a range of actuator styles. This specific variant has a 40mm red mushroom head, push-lock/twist-release operation, and a single 1NC (SPST-NC) contact block with silver-clad contacts. It is non-illuminated and uses screw-clamp termination. The switch is manufactured in Japan and carries a UPC/GTIN of 4550034067013.

2. User Sentiment

No direct forum discussions or user reviews were found in the collected data. Distributors including Galco and Wolf Automation echo IDEC's own marketing that the HW series is "the best engineered switch in the world," indicating strong brand positioning. The switch has a NASA stock number (NSN 5930-01-697-0507), appearing in aerospace/defense procurement databases, which points to strong confidence from demanding end-users. It also appears on medical equipment resale platforms (DotMed), suggesting broad adoption. Pricing varies widely across the supply chain — from ~$5.75 (AliExpress grey-market) to $54.65 (Mouser Canada single unit) — with authorized distributors typically in the $30–$47 USD range for single units.

3. Real-World Applications

The HW1B-V4F01-R is used across a broad range of industries. Amazon Canada's listing explicitly calls out pharmaceutical, food and beverage, and general process (washdown) applications, enabled by IP65 front-of-panel protection. Its NSN (5930-01-697-0507) and listing on aerospace-electrical.com confirms use in aerospace and defense equipment. The DotMed marketplace listing indicates presence in medical equipment. The fail-safe SPST-NC (normally closed) design means the circuit is closed during normal operation and opens on actuation, which is the standard requirement for safety-critical machinery per EN ISO 13850 / IEC 60947-5-5.

4. Technical Specifications

• Type: Non-illuminated emergency stop pushbutton, push-lock/twist-release (push-lock turn reset)
• Actuator: 40mm red mushroom head, plastic bezel, 2-position
• Panel Cutout: 22mm (22.30mm diameter, circular)
• Contact: 1NC (SPST-NC), silver-clad (Ag), finger-safe IP20 screw-clamp terminals
• Rated Insulation Voltage: 600V AC (440V max AC / 220V max DC per OnlineComponents)
• Rated Current: 10A AC (110VAC operating), 8A DC (24VDC operating); range 5mA at 3V to 10A at 120V AC
• Power: 745.7VA
• IP Rating: IP65 (panel front, dust-tight and water jet resistant); IP20 (contact block, finger-safe)
• Operating Temperature: -25°C to 50°C (some sources state up to 60°C or 65°C)
• Vibration Resistance: 10–55Hz, 98 m/s² (from Chinese distributor datasheet)
• Shock Resistance: 980 m/s²
• Mechanical Life: 500,000 cycles (Thermal Devices); one source cites 10,000,000 cycles electrical life (Partstack)
• Weight: 31.8g
• Country of Origin: Japan
• Compliance: UL listed, CSA certified, TUV approved, CE marked, CCC (China), EN418/IEC 60947-5-5 (positive opening action), UL Type 4X; IEC 60947-5-1 direct opening

5. Ordering & Compatibility

The switch is available globally through major distributors. Mouser PN: 199-HW1BV4F01R; DigiKey PN: 1885-1044-ND; Newark/Farnell DP: 1345380 (74K3755 at Newark US); RS Components stock: 832-6142. USD pricing: ~$30–$47 single unit authorized (Mouser USA ~$54.65 CAD, Mouser Luxembourg €31.62, Wolf Automation $33.75, DigiKey $46.86, Radwell ~$41.34). Variants include HW1B-V4F01-R-MAU (assembly with contact block, plastic bezel), HW1B-V4F01-R-EMO-2 (2-pack with metal bezel and white EMO marking, ~$62.59), and HW1B-V4F11-R (2NC contacts). The compatible contact block is HW-F01 (1NC). The HW4B series offers the same mushroom operator in larger formats. Minimum order from IDEC direct is $150 USD.

6. Known Issues

No significant manufacturing defects or reliability issues are reported in the available sources. One pricing anomaly: AliExpress lists the switch at $5.75, which is far below authorized distributor pricing of $30–$55, indicating potential grey-market or counterfeit risk at ultra-low prices. The switch was noted as "discontinued" in one OnlineComponents listing (with 87 units remaining), though DigiKey, Mouser, and RS list it as active — this discrepancy may reflect a specific distributor's inventory status rather than true discontinuation. No significant issues reported.