Schneider Electric XB4BD25 Selector Switch 2 pos 1 NO + 1 NC

XB4BD25: 2-position Harmony XB4 selector switch

The XB4BD25 is a Schneider Electric Harmony XB4 metal selector switch for a 22 mm hole with a black standard handle: a two-position maintained selector with one normally open and one normally closed contact. Seven Star LLC supplies the XB4BD25 in Oman and the GCC as an independent supplier based in Muscat to control-panel builders and maintenance teams.

The added normally closed contact lets one handle enable one circuit while it disables another, for example selecting manual while inhibiting automatic. Positive opening is listed for this part. The datasheet gives the angular layout as 2 positions 90°, and the operator type as stay put. The part number appears to follow the XB4B family stem, then D for the selector operator and digits for the position and contact option, though the manufacturer’s ordering table is the final authority.

Typical uses of XB4BD25 in Oman and the GCC

Selectors like this are the standard way to choose between hand and automatic, local and remote or forward and reverse on pump starters, fan and compressor panels, gate and door controls, crane stations and packaged skids across the region. The 2-position layout of XB4BD25 suits simple two-way choices where the state must stay visible and stay put.

With a metal bezel, a wide temperature range and sealing up to the levels listed, the selector copes with desert dust, washdown and coastal humidity. As with any operator on an exposed panel, a legend plate describing each position is worth fitting so that site staff do not have to guess.

Technical specifications of the XB4BD25

Contact ratings and life of the XB4BD25

The contact blocks are silver alloy (Ag/Ni). The thermal current is 10 A, the insulation voltage is 600 V at pollution degree 3 and the impulse withstand is 6 kV. Operational ratings include 3 A at 240 V and 6 A at 120 V in AC-15, and 0.27 A at 250 V and 0.55 A at 125 V in DC-13, with a 10 A gG cartridge fuse specified for short-circuit protection. These are control-circuit ratings: the contacts switch relay coils, PLC inputs and contactor coils rather than motors directly.

Electrical life is stated as 1 million cycles at 2 A, 230 V in AC-15, 3 A at 120 V and 4 A at 24 V, at up to 3600 operations an hour with a load factor of 0.5, plus 1 million cycles at 0.2 A, 110 V and 0.5 A, 24 V in DC-13. Mechanical life is 1 million operations, a lower figure than for push-buttons because the handle and its detent mechanism are more complex, so a selector that is switched constantly needs a service plan.

Selection checklist and RFQ information for XB4BD25

Send the points below so that the part number can be confirmed against the datasheet and checked for availability in a single reply.

• Required quantity and the full part number XB4BD25.
• Panel thickness and the position of any anti-rotation key or nameplate.
• Rear clearance behind the panel, checked against the body depth.
• Control voltage and current of the circuit the contacts will switch.
• Any approval needed by the project, such as marine or UL, compared with the datasheet.
• Delivery location in Oman or the GCC and the lead time you need.
• Confirmation of the handle positions needed, here 2 positions, stay put, and the contact map in your schematic.

Sealing, temperature and approvals of the XB4BD25

The chromium-plated metal bezel and zamak fixing collar give this operator a robust front face. The datasheet lists protection ratings of IP69, IP69K, IP67, and the unit is stated for UL type 4X/13 enclosures, so it can sit in washdown or dusty locations where a plain panel hole would not survive. Operating and storage temperatures are both given as -40 to 70 °C, a wide window that covers a summer-heated switch room as well as an unheated outdoor cabinet.

The approvals listed on the datasheet are BV, UL, CSA, DNV, LROS (Lloyds register of shipping). Marine and offshore projects often ask for the Lloyd’s Register, Bureau Veritas or DNV entries, but XB4BD25 should only be accepted against a requirement that appears on the datasheet for this exact reference. Vibration resistance is 5 gn between 2 and 500 Hz, with shock rated at 30 gn for 18 ms and 50 gn for 11 ms, figures worth quoting when the panel is mounted on a skid or on rotating plant.

Panel mounting and terminal wiring of the XB4BD25

The operator fits a standard 22.5 mm hole. The body measures 47 mm high, 30 mm wide and 68 mm deep, and weighs 0.105 kg, so the rear depth is the figure to check on shallow doors, and note that the selector is deeper than a push-button. The datasheet gives a tightening torque of 0.8 to 1.2 N.m for the terminals and lists screw heads compatible with Philips and pozidriv No 1 drivers as well as flat 4 mm and 5.5 mm blades.

Conductor capacity is up to two 1.5 mm² wires with cable ends, or single wires from 0.22 mm² upward without ends. The datasheet also states a resistance to a high-pressure washer of 7000000 Pa at 55 °C from 0.1 m, which is useful for food, beverage and marine-type duty, though a clean, undamaged seal against the panel is what makes the rating real in practice.

Handle positions and contact logic of XB4BD25

The handle rests in either of two positions 90 degrees apart and stays where the operator leaves it, with the contact changing state in the second position. The datasheet lists a torque of 0.14 N.m at the point where the normally open contact changes state, so the handle needs little effort but is firm enough to avoid accidental operation by a sleeve.

The contact configuration is 1 NO + 1 NC, with ISO terminal marking (13-14)NO, (21-22)NC. Positive opening is listed for this selector: the normally closed element is forced open mechanically even if its contacts have welded. Reading XB4BD25 correctly on the wiring drawing means checking which handle position closes which terminal pair before you write the logic.

Documents and quotation

The Schneider Electric datasheet for the XB4BD25 is attached on this page for your technical file. It carries the electrical, mechanical and environmental data summarised above, together with dimension and wiring drawings.

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 check the datasheet against your project requirements before ordering.