ZBY-2304

1. Overview

The ZBY2304 is a legend plate accessory from Schneider Electric's Harmony ZBY series — a pre-marked legend holder designed to label 22mm control and signalling units in industrial control panels. It carries the English word "STOP" printed in white on two interchangeable sides: one black background and one red background. The part belongs to the Harmony XB4 family (also sold as Square D / Telemecanique), and serves as the canonical STOP counterpart to ZBY2303 (START) in Schneider's English-language legend range.

2. User Sentiment

No forum or review-community sentiment was found for this accessory — as a purely functional marking component, user discussion is essentially absent. Market data indicates consistent availability across global distributors (DigiKey, Mouser, RS Components, Newark/Farnell, TME), suggesting stable demand. eBay activity shows the part moves in both singles and packs of 10, with bulk lots listed by UK and US surplus sellers, indicating it is a common industrial spare.

3. Real-World Applications

The ZBY2304 is installed on pushbutton control stations in manufacturing, machine-tool, conveyor, and process-control panels, anywhere a clearly marked STOP button is required. Its dual-sided insert (black and red) allows the installer to select background colour per application or local safety convention — red background being standard for STOP/emergency functions per IEC/ISO colour coding. Compatible products include the full XALD, XALE, XALK, XB4, XB5, and XB7 control station ranges.

4. Technical Specifications

• Type: Legend holder (marking accessory), pre-marked
• Legend text: STOP (English)
• Legend colours: White text on 1 black side + 1 red side (two-sided insert)
• Housing colour: Dark grey (plastic frame)
• Legend holder dimensions: 30 × 40 mm (rectangular)
• Legend plate/insert dimensions: 8 × 27 mm
• Panel cutout / device size: 22 mm (Ø22)
• Material: Plastic
• Weight: approx. 0.956 g (per TME spec)
• EAN: 3389110841305
• UPC: 785901372899
• Country of origin: France
• RoHS compliant: Yes
• Related variants: ZBY2304C0 (blank holder, no pre-print); ZBY2304C1 (white-plated legend holder)
• Sibling legend: ZBY2303 = START

5. Ordering & Compatibility

The ZBY2304 is stocked globally and priced approximately $3.00–$4.16 USD retail (DigiKey $3.00; RSP Supply $4.16; IndustryNova $3.09; datasheet list price ~$4.08). It is compatible with all standard 22mm Harmony control or signalling units including XB4, XB5, XB7, and XALK/XALD/XALE control stations. The holder snaps onto the head with a single screw for quick assembly/disassembly. Related accessories include ZBY2303 (START), ZBY2308 (EMERGENCY STOP), ZBY2305 (FORWARD), ZBY2306 (REVERSE), ZBY2307 (UP), ZBY2308 (DOWN), ZBY2311 (ON), ZBY2312 (OFF). French-language equivalent: ZBY2104 (ARRET, red background) or ZBY0104 (ARRET, black background).

6. Known Issues

No significant issues reported. The part is a passive plastic accessory with no electrical function. One minor market note: the older Telemecanique branding (pre-Schneider merger) appears on surplus listings; the product is functionally identical. Zoro.com description lists it as "white/black and red" which correctly describes the dual-sided insert, not a single colour — potential spec confusion for first-time buyers.