Schneider Electric ZB4BH03 Green Flush Push-Push Head

ZB4BH03: green flush push-push head

The ZB4BH03 is a Schneider Electric Harmony XB4 head for a non-illuminated pushbutton, with a green flush unmarked button and a push-push action. It is a chromium plated metal ZB4 head for a 22.5 mm hole, sold on its own without contact blocks. Seven Star LLC supplies the ZB4BH03 in Oman and the GCC as an independent supplier in Muscat.

Push-push means the first press latches the button down and the second press releases it, so one button can start and stop a function without a separate stop control. The datasheet quotes mechanical durability of 5000000 cycles, a figure suited to frequent toggling.

Information to send with an RFQ for ZB4BH03

Please send the details below so that we can confirm the part number against its datasheet.

• Part number ZB4BH03 and quantity.
• Button colour and whether an unmarked face with a separate legend is acceptable.
• Contact blocks needed behind the head.
• Panel cut-out size and thickness.
• Washdown or ingress requirements for the site.
• Approvals required for the project.
• Delivery location and lead time.

If you are replacing a head, a photo of the old head and its rear blocks helps to confirm that the replacement matches.

Applications of ZB4BH03 in the region

Push-push heads are common on machine panels for lighting, auxiliary fans, heaters, dosing pumps and test functions. In Oman and the GCC they turn up on workshop machinery, packaged skids and building services panels. Panels in Oman and the GCC see high ambient temperature, dust, wash-down on offshore and coastal sites and humidity from sea air, so the ingress rating of the head matters as much as its electrical function.

Selection notes for ZB4BH03

The face is unmarked, so a legend or a plate on the panel must carry the meaning of the green button. Green is usually assigned to start, run or enable, and when it is latching, the operator will expect to see its position. Check whether the project prefers a lit button so that the state is visible from the lamp rather than from the button height.

The datasheet lists IP69, IP69K and IP67, which suits panels that are washed down, but not IP66 as for the heads with a boot. Its contact block codes and combinations are those in the Harmony XB4 system; the head does not include them.

How ZB4BH03 fits the ZB4 head system

A complete station built around this unit has three parts: the head, a fixing and contact assembly on the back, and a legend plate or marking on the front. The Harmony XB4 range sells heads and blocks as separate items, which lets a panel builder keep one stock of blocks and choose the face of each control later. Because the ZB4BH03 is sold as a head only, always confirm the block part numbers and their voltage and current ratings for your circuit from the matching datasheets.

When the control scheme is reviewed, the head, the legend and the rear blocks should be documented together, since a panel that is modified later is much easier to maintain when each station can be identified by its head part number. For spares, hold a few heads of each type rather than whole stations, because the heads are the parts most exposed to knocks, sun and cleaning chemicals.

Push-push action and the ZB4BH03 output

A push-push button alternates between two states with each press and keeps the contacts in the new state until it is pressed again. Because the state is held mechanically in the head, the contact blocks behind it do not need a holding relay for simple on-off duty. The head is a flush type, 28 mm deep with a 29 mm square envelope, so the button face sits level with the bezel and is hard to press accidentally.

For safety, never use a latching button as the only means of stopping hazardous equipment; an emergency stop head is the right device for that. This unit is suited to non-critical changeovers such as lamp test, mode toggles or auxiliary services.

Environmental data and approvals for ZB4BH03

The datasheet lists degrees of protection IP69, IP69K, IP67 under IEC 60529 and impact rating IK06, with the UL enclosure type given as 4X/13. Operating temperature is -40–70 °C and storage temperature -40–70 °C. Vibration resistance is 5 gn (f= 2…500 Hz) per IEC 60068-2-6 and shock resistance is 30 gn for 18 ms or 50 gn for 11 ms, half sine, per IEC 60068-2-27. The datasheet lists these certifications: BV, CSA, DNV, LROS (Lloyds register of shipping), UL listed. Standards named include UL 508, IEC 60947-5-4, IEC 60947-1, JIS C8201-5-1, IEC 60947-5-5, CSA C22.2 No 14.

The product environmental data section shows EU RoHS compliance and an average recycled plastic content of 14 per cent. Warranty is given as 18 months. A single-piece pack measures about 5 cm per side, and the bulk carton holds 5 pieces. Country of origin on the datasheet is France.

Technical specifications of the ZB4BH03

Installation and maintenance of ZB4BH03

Drill the panel to 22.5 mm and fit the head from the front, then clamp it with the collar or fixing blocks from the rear. Because the head carries no contacts, fit the contact or lamp blocks on the back only after the head is secured, and keep conductor ends clear of moving parts. Fit and torque the retaining parts as the datasheet’s mounting drawing shows; the drawing page gives the cut-out and clearance for the fitting.

During commissioning, operate this unit through its full range, check each contact state with a meter and confirm that the legend plate matches the function. In service, wipe the bezel clean, check seals during shutdowns, and replace any head that is cracked, loose or sticking. Keep a spare head in the maintenance store for panels that cannot be taken offline.

Documents and quotation

The Schneider Electric datasheet for the ZB4BH03, dated 8 Nov 2026, is attached on this page for your technical file. It lists the characteristics, environmental data and dimension drawings summarised above.

To request a quotation, send the part number and quantity through the enquiry form and we will reply with availability and delivery terms. Seven Star LLC is an independent supplier and does not act for the manufacturer, so please confirm that the datasheet data suits your project before ordering.