Schneider Electric XB4BG33 Key Selector Switch 3-Pos 2 NO

XB4BG33 three-position key switch with two contacts

The XB4BG33 is a chromium-plated metal key selector from the Schneider Electric Harmony XB4 range for 22 mm panel holes. It offers three stay-put positions at ±45°, with two normally open contacts (13-14 and 23-24). Key number 455 is listed on the datasheet. Seven Star LLC supplies the XB4BG33 in Oman and the GCC as an independent supplier based in Muscat.

The datasheet describes the product as a complete unit, so the operator and the contact block come together, ready to fit into a panel door or console. The information below is taken from that document and shows where this reference sits among the neighbouring key selectors.

XB4BG33 technical specifications

How the XB4BG33 operates

This unit has three positions at ±45° and holds each one. The key can be withdrawn in the centre position, according to the datasheet, which makes the centre the natural ‘off’ or ‘neutral’ state and the two sides two distinct modes. With two NO contacts, each side can close its own contact: for example left for local mode and right for remote mode. Operating torque is 0.14 N.m NO changing electrical state.

Contacts and electrical ratings of the XB4BG33

What this unit can switch is set by its contact block: slow-break action, silver alloy (Ag/Ni) contacts, a 10 A conventional thermal current, 600 V insulation voltage at pollution degree 3 and 6 kV impulse withstand. The datasheet names a 10 A gG fuse as short-circuit protection. The utilisation-category ratings below are what a designer needs when the contacts drive coils or logic inputs.

• 3 A at 240 V, AC-15, A600
• 6 A at 120 V, AC-15, A600
• 0.1 A at 600 V, DC-13, Q600
• 0.27 A at 250 V, DC-13, Q600
• 0.55 A at 125 V, DC-13, Q600
• 1.2 A at 600 V, AC-15, A600

Sealing and environment of the XB4BG33

The degree of protection is IP66, IP69, IP69K, IP67. The impact rating on the datasheet is IK06 with keyhole cover ZBGP. Vibration resistance is 5 gn (f= 2–500 Hz). Shock resistance on the datasheet is 30 gn (duration = 18 ms) for half sine wave acceleration and 50 gn (duration = 11 ms) for half sine wave acceleration. The permitted operating ambient temperature is -40–70 °C. The keyhole cover ZBGP is referred to in the datasheet for the IK06 value, and it is worth fitting where the front face is exposed to knocks or washdown.

The certifications named on the datasheet include BV, DNV and LROS (Lloyd’s Register) as well as UL and CSA, which is why this style of operator is often chosen for skids and marine-type packages. Always check the approval you need against the exact ordering reference.

XB4BG33 compared with other key selectors

The four key selectors in this group differ in the number of positions, the return action, the contacts and the approvals, as the comparison below shows.

Selection and installation of the XB4BG33

• Positions: 3 positions +/- 45°, stay put.
• Contacts: 2 NO (terminal marking (13-14)NO).
• Key: number 455, withdrawn at the center position.
• Panel: 22.5 mm mounting hole in the datasheet standard version.
• Environment: matches the temperature range and sealing listed above.
• Add a keyhole cover where impact or washdown applies.

Fit this unit through a 22.5 mm hole and tighten the fixing as the datasheet specifies: 0.8–1.2 N.m. Terminals accept ≤ 2 × 1.5 mm² with cable end and ≥ 1 × 0.22 mm² without cable end, and screw heads take Philips no 1, pozidriv no 1 or flat 4 and 5.5 mm drivers. Wire the contact to the panel with the terminal marking in mind.

At commissioning, test every key position with the control circuit energised, confirm that the key can only be withdrawn at the stated position, and record who holds the keys. Re-test the contact function after any rewiring.

Where the XB4BG33 is used in Oman and the GCC

Typical uses are local/remote or auto/manual selection on motor control panels, maintenance lock-out in pump stations, and permission switches on desalination, power and oil and gas skids. In coastal sites with salt and humidity, the IP66 to IP69K sealing is the reason this metal operator is chosen over a plastic one.

A key switch is a procedural device as much as an electrical one. Decide who may hold the key, agree what happens when a key is lost, and write the safe key position into the operating instructions so that nobody has to guess at the handover.

Information to send with an RFQ for the XB4BG33

Please give us the exact reference XB4BG33, how many pieces you need and where they are going in Oman or the GCC. State the number of positions, stay-put or spring return, the contacts required and whether an ATEX approval is needed. For a replacement job, a clear photo of the old device and its marking removes any doubt about the match.

Documents and quotation

A copy of the Schneider Electric datasheet of this unit is attached to this page for download, and every value quoted here comes from that document.

For a quotation, use the RFQ form and quote XB4BG33 together with the quantity and the destination. Seven Star LLC will come back with stock status and delivery time.