Schneider Electric XB4BJ21 Long-Handle Selector 2-Pos 1 NO

XB4BJ21 long-handle selector switch, two positions

The XB4BJ21 is a Harmony XB4 metal selector switch with a black long handle for 22 mm panel holes. It offers two stay-put positions at 90° and one normally open contact (13-14). The long lever gives a firm grip with gloves and a clear visual indication of position. Seven Star LLC supplies the XB4BJ21 in Oman and the GCC as an independent supplier based in Muscat.

The datasheet lists this as a selector switch of the chromium-plated metal family with Zamak fixing collar. The sections below set out the figures given there, plus the points that decide whether it suits a particular panel.

XB4BJ21 technical specifications

XB4BJ21 and its long-handle sibling

Two long-handle selectors are covered in this group. They share housing and electrical data, and differ in the number of positions and contacts.

Positions and handle action of the XB4BJ21

The handle moves between two positions 90° apart and holds either one. One normally open contact closes in the second position, which makes the switch an on-off or auto-manual selector in its simplest form. The operating torque in the datasheet is 0.14 N.m NO changing electrical state. Mechanical durability is 1000000 cycles.

Contacts and electrical ratings of the XB4BJ21

The contact block of this unit is a slow-break design with silver alloy (Ag/Ni) contacts. The datasheet gives a conventional thermal current of 10 A, a rated insulation voltage of 600 V (pollution degree 3) and a rated impulse withstand of 6 kV. Short-circuit protection is a 10 A gG cartridge fuse. Rated operational currents are listed below, and they are the figures to use for relay coils, contactor coils and PLC inputs on the control circuit.

• 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 XB4BJ21

For operation the datasheet gives an ambient range of -40–70 °C. The degree of protection is IP69, IP69K, IP67. Vibration resistance is 5 gn (f= 2–500 Hz). For shock the datasheet quotes 30 gn (duration = 18 ms) for half sine wave acceleration and 50 gn (duration = 11 ms) for half sine wave acceleration. Notice that the datasheet lists IP67, IP69 and IP69K for this handle version and does not list IP66, so check this before specifying where jet washing is not the issue but dust is.

Selection and installation of the XB4BJ21

• Positions: 2 positions 90°, stay put.
• Contacts: 1 NO.
• Handle: black long handle, easy to use with gloves.
• Panel hole: 22.5 mm; overall depth behind the panel 68 mm.
• Sealing: IP67, IP69 and IP69K listed.
• Need a lamp in the knob? Use an illuminated selector instead.

Fit this unit through a 22.5 mm panel hole and tighten the fixing to 0.8–1.2 N.m. Terminals accept ≤ 2 × 1.5 mm² with cable end and ≥ 1 × 0.22 mm² without cable end; screw heads take Philips no 1, pozidriv no 1, or flat 4 and 5.5 mm drivers. Wire the contacts by their ISO marking.

At commissioning, cycle the handle through every position with the control circuit live and confirm that each contact closes in the intended position and nowhere else. Re-test after any rewiring, and keep a record of the tested state with the panel documents.

Where the XB4BJ21 is used in Oman and the GCC

Two-position selectors are typically used for local/remote, run/test or enable/disable functions. In the hot, dusty conditions of Omani industrial plants a metal handle that keeps its feel and does not crack in UV is a practical choice for exposed control stations and outdoor junction panels.

In practice a two-position lever of this kind is the workhorse of simple control panels. The first position leaves the contact open and the second closes it, so the same switch can enable a drive, select a local control mode or switch a heater on a cabinet. With only one contact there is nothing to coordinate, which also makes it quick to fault-find: a continuity check across the two terminals tells you the whole story. If a second circuit has to follow the switch, add a contact block rather than changing the switch type.

Compared with a short knob, a long lever is quicker to read at a distance and easier to turn with gloves, but it protrudes further and can be caught by sleeves or tools. Leave clearance for the full handle travel, and label each position on a nameplate beside the switch so that operators do not have to guess what a position means.

Information to send with an RFQ for the XB4BJ21

Send the part number XB4BJ21, the quantity and the delivery location in Oman or the GCC. State the number of positions, the contact arrangement and the panel hole size. If you are replacing an installed unit, a photo of its side label or of the rear of the block helps us confirm that the reference is identical.

Documents and quotation

The official Schneider Electric datasheet for this unit is attached on this page, so each figure above can be checked against the source document.

To request a quotation, send the part number XB4BJ21, the quantity and the delivery location through the RFQ form. Seven Star LLC replies with availability and lead time.