ZBY-2303

1. Overview

The ZBY2303 is a rectangular legend holder (legend plate) from Schneider Electric's Harmony series, designed for 22mm push button control and signalling units. It is a marking accessory — a plastic frame that holds a printed label insert — and is not a push button itself. The product belongs to the Harmony XB4 family (with a companion variant ZBY2303C0 for the XB5 plastic series with grey bezel). It is also sold under the Square D and Telemecanique brand names, reflecting Schneider Electric's product family consolidation. The ZBY2303 is an active, widely stocked global product manufactured in France with EAN code 3389110841268.

2. User Sentiment

No forum or community review data was found for this accessory — it is a simple marking component that rarely attracts user discussion. Distributor listings universally describe it as a straightforward, dependable accessory. Multiple distributors highlight its "quick and easy assembly and disassembly" and suitability for "harsh environments." The product is stocked by dozens of global distributors in the Americas, Europe, Asia, and Oceania, suggesting strong market acceptance. No complaints or quality issues were identified across any source.

3. Real-World Applications

The ZBY2303 is used in industrial control panels and machine operator stations where push buttons require clear identification labels. It is installed in manufacturing, process control, and automation applications across all industrial sectors — packaging machinery, conveyors, motor control centers, and industrial panels. It is particularly suited for OEM panel builders and MRO replacement applications. The "START" legend provides standardized English-language labeling for motor start pushbuttons, with companion part ZBY2304 providing the "STOP" legend. Multi-language variants exist (French MARCHE ZBY2103, German EIN ZBY2203) for international deployments.

4. Technical Specifications

• Type: Legend holder (marking accessory) — rectangular, with integrated legend insert
• Legend text/marking: WHITE "START" on 1 black side, 1 red side background (two-sided: black background + red background versions included)
• Legend insert size: 8 x 27 mm
• Legend holder (plate) size: 30 x 40 mm
• Mounting hole diameter: Ø 22 mm
• Material: Plastic
• Colour: Dark grey (holder body)
• Language: English
• Range compatibility: Harmony XB4 (metal), Harmony XB5 (plastic), Harmony XB7; any standard 22mm Harmony control or signalling unit with standard head
• Customizable: No (pre-marked; blank versions available separately, e.g., ZBY2101)
• Pack size: Sold in packs of 10 units
• Weight: 0.974 g
• Country of origin: France
• UPC: 785901372882

5. Ordering & Compatibility

Pricing ranges from approximately $3.00–$4.08 USD per unit (DigiKey $3.00, IndustryNova $3.05, Zoro/Gordon Electric ~$3.36, datasheet reference $4.08). Available globally from major distributors including DigiKey (PN: 4008-ZBY2303-ND), Farnell/Element14 (DP: 3730311), RS Components, Radwell, TME, and Sonepar. Compatible with Harmony XB4 metal push buttons and XB5/XB7 plastic units using a 22mm panel cutout. The related variant ZBY2303C0 is the XB5-specific version with a grey bezel. Other START family members: ZBY2304 (STOP), ZBY2305 (FORWARD), ZBY2306 (REVERSE), ZBY2307 (UP), ZBY2308 (DOWN), ZBY2311 (ON), ZBY2312 (OFF). Legend holders can be ordered separately from legend inserts per the Schneider Harmony Legend Plate Guide.

6. Known Issues

No significant issues reported. One minor point of confusion: some US distributor pages (PartsSource, electricalparts.com) mislist the background as "White/Black" while the official Schneider spec and most authoritative sources specify "White START on 1 black side, 1 red side background" — the legend holder kit includes two-sided inserts. The voomiSupply listing incorrectly conflates ZBY2303 with an XB6 illuminated push button (16mm, 240VAC) — this is a data error on that retailer's part and should be treated as unreliable.