Schneider Electric ZB4BK1233 Green Illum. Selector Head 2-Pos

ZB4BK1233: Green illuminated selector switch head

The ZB4BK1233 is a Schneider Electric Harmony XB4 head for an illuminated selector switch, with a green standard handle and 2 positions 90°. It is a chromium plated metal ZB4 head for a 22.5 mm panel hole, listed as compatible with a universal LED, so the light source is a separate component that clips behind the head. Seven Star LLC supplies the ZB4BK1233 in Oman and the GCC as an independent supplier in Muscat.

Because the handle lights, one component both selects a mode and confirms it to the operator. Green normally marks a safe, normal or permitted state such as run, open or ready.

Operator and illumination behaviour of ZB4BK1233

A stay-put operator keeps the handle where the operator leaves it. Each position is a detent, and the handle does not move back by itself when released, so the selected state is held mechanically until someone turns the handle again. ZB4BK1233 is the 2 positions 90° version, with mechanical durability of 1000000 cycles.

The handle is a coloured operator that is lit when the LED block behind it is powered. Since the head does not contain a lamp, the LED, its supply voltage and the contact blocks are chosen separately. The datasheet lists composition codes beginning with M for front mounting with an integral LED, which state how many contact blocks can be combined with the lit head. The overall depth of the head is 43 mm, which determines how much space the rear assembly will need.

Choosing among illuminated selector heads like ZB4BK1233

The five illuminated selector heads in this lane vary in colour, positions and return behaviour. Pick the colour for what the lit handle should communicate, then the number of positions for the logic. Notice also that durability is 1 million cycles for two-position stay-put heads and 500 thousand for the three-position ones.

Information to send with an RFQ for ZB4BK1233

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

• Part number ZB4BK1233 and quantity.
• Handle colour and its meaning in your panel legend.
• Positions and return behaviour required.
• LED block type and supply voltage, since the head does not include a lamp.
• Contact blocks to be fitted.
• Panel cut-out size and rear clearance.
• 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.

Technical specifications of the ZB4BK1233

Installation and maintenance of ZB4BK1233

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.

Environmental data and approvals for ZB4BK1233

The datasheet lists degrees of protection IP66, IP67, IP69, IP69K under IEC 60529 and impact rating IK04, 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: CSA, DNV, BV, LROS (Lloyds register of shipping), UL listed. Standards named include IEC 60947-5-5, CSA C22.2 No 14, IEC 60947-5-1, JIS C8201-5-1, IEC 60947-1, IEC 60947-5-4.

The product environmental data section shows EU RoHS compliance. Warranty is given as 18 months. A single-piece pack measures about 5 cm per side, and the bulk carton holds 250 pieces. Country of origin on the datasheet is France.

How ZB4BK1233 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 ZB4BK1233 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.

Where ZB4BK1233 is used

Illuminated selectors show the chosen mode on motor control centres, pump houses, tank farm panels and utility switchgear. A lit handle tells an operator across a dim room which mode the plant is in. In Oman and the GCC this is useful for night-time rounds and for shaded outdoor kiosks. 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.

Documents and quotation

The Schneider Electric datasheet for the ZB4BK1233, 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.