Schneider Electric ZBVG4 Red Light Block

ZBVG4: red protected LED light block for Ø22 heads

The ZBVG4 is a Schneider Electric light block from the Harmony XB4 and XB5 families, built to sit behind a 22 mm illuminated head and provide its red light from an integral LED. It runs directly from 110 to 120 V AC V at 50/60 Hz and connects by screw clamp terminals. Seven Star LLC supplies the ZBVG4 in Oman and the GCC as an independent supplier in Muscat, mainly for maintenance teams and panel shops that need to restore a lit station without redesigning it.

The datasheet, generated on 8 Nov 2026, marks the ZBVG4 as discontinued on 15 May 2023. It belongs to the older coloured-LED generation, and the datasheet itself notes that all coloured LED blocks were replaced by a single universal LED block for use with the newer illuminated heads. Stock should therefore be confirmed before a project depends on it.

Electrical immunity and environment of the ZBVG4

The datasheet lists a surge withstand of 1 kV to IEC 61000-4-5, resistance to fast transients of 2 kV to IEC 61000-4-4, 10 V/m radiated field immunity to IEC 61000-4-3, and electrostatic discharge immunity of 6 kV on contact and 8 kV in air to IEC 61000-4-2. Emission is stated as class B. Those figures matter on panels that share a cabinet with drives, contactors and radio equipment.

The block itself is protected only to IP20, so it relies on the head and the enclosure for ingress protection. Temperature is given as -40 to 70 °C for both storage and operation, and the protective treatment code is TH. Certifications listed are CSA and UL listed, and the standards include IEC 60947-5-1, IEC 60947-5-4, IEC 60947-5-5, UL 508 and CSA C22.2 No 14. Check these against the project approval list before relying on any of them for ZBVG4.

How the ZBVG4 lights the head

The datasheet describes the light source of the ZBVG4 as a protected LED with an integral LED bulb base, and the supply as direct, so there is no resistor box or transformer to add. Current consumption is given as 14 mA. Service life is quoted as 100,000 hours at rated voltage and 25 °C, which is more than eleven years of continuous operation under those conditions, although panel heat in a Gulf summer will shorten any such figure.

Because the colour is produced by the red LED itself, a clear or white cap shows the true block colour and a tinted cap shifts it. When a station uses a coloured lens, match the cap colour to the block colour so that the lit and unlit appearance agree with the colour table in the project specification.

Information to send with an RFQ for ZBVG4

The points below let us confirm the part number against the datasheet and check stock in one reply.

• Part number this unit and the quantity, remembering the pack size of 5.
• The supply voltage and whether it is AC or DC at the station.
• The head type and lens colour in front of the block.
• Whether the older coloured-LED type is needed to match existing stations, or a universal block is acceptable.
• The contact blocks stacked with it, using the composition code if known.
• Any approval the project asks for, to compare with the datasheet.
• Delivery location and urgency.

A photo of the existing block with its markings makes a like-for-like check quick.

Fitting and replacing a ZBVG4 block

The block is front mounted, so it clips onto the back of the head from the panel side. The terminals accept up to two 1.5 mm² conductors with cable ends, or one conductor as small as 0.22 mm² without a ferrule, and the datasheet gives a tightening torque of 0.8 to 1.2 N.m. The screw heads accept a Philips or Pozidriv no 1 driver or a flat 4 mm or 5.5 mm blade. The net weight of one block is 0.017 kg.

When replacing a failed lamp, isolate the control circuit first, note the wire positions, fit the new this unit in the same orientation and then test the lamp and the contacts together. The part is sold in indivisible quantities of 5, so a single replacement still arrives as a pack.

Comparing the ZBVG4 with similar ZBV blocks

Eight light blocks in this group share the same ZBV short name, the same screw clamp terminals and the same 0.017 kg body. They differ in supply range, LED type and colour, and the table summarises what the datasheets say.

Technical data for the ZBVG4

Where the ZBVG4 sits in a station

The ZBVG4 is the lamp layer of a three-part stack. The head and its lens or cap are at the front, the light block clips behind it, and one or more contact blocks can be stacked with it. The datasheet lists the electrical composition codes M1, M2, M3, M4, M5, M6, M10, MF1, P1, P2 and PF1, which describe the combinations of contact blocks that can be assembled with this integral-LED block for front mounting. Two fixing collars are shown on the dimension drawing, the ZB5AZ009 for XB5 stations and the ZB4BZ009 for XB4 stations.

Red lights mark stop, fault and alarm conditions. Behind a head on a 110 to 120 V AC circuit it is usually the trip or fault lamp of a motor starter, so a replacement part must keep the same red appearance for operators.

Where such light blocks are used in Oman and the GCC

Illuminated stations are found on motor control centres, pump and fan starters, packaged skids, generator panels and local control stations in oil and gas, power, water and desalination plants. A block like this unit is usually bought as a spare so that a failed lamp can be changed in minutes. The wide -40 to 70 °C range suits Gulf panels, but cabinets in direct sun should be ventilated or shaded because LED life falls as temperature rises.

Documents and quotation

A copy of the Schneider Electric datasheet for the ZBVG4 is attached on this page for your technical file. It holds the electrical, mechanical and environmental values that are summarised above.

To request a quotation, send the part number and the 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 compare the datasheet with your project requirements before you order.