What it is and where it sits
The Telemecanique XSDH407339 (Square D / Schneider brand) is a block-format inductive proximity sensor in the XSD series, built in a thermoplastic polyester housing and intended as a presence-detection switch on industrial machinery. It's the rectangular cousin of the tubular XS metric line — front-facing sensing, screw-terminal termination, 4-wire hookup — and it fits where a barrel sensor physically cannot, like a conveyor frame rail or a pallet-stop pocket.
Ratings that decide fit
The four ratings that drive the BOM line: 40 mm rated sensing distance on an unshielded front face, 12 to 48 VDC operating supply, a 50 Hz switching frequency, and a NO-NC PNP output rated for 200 mA maximum load current. The 40 mm figure is generous for a block-format unshielded sensor — useful on bulk-material or pallet-position work where the target approaches on the face rather than passing a side switch. The 50 Hz ceiling means it's not the device for high-speed parts counting; it fits machine-position and end-of-stroke duty. At 12 VDC the PNP output still pulls the rated 200 mA, so the sensor can switch a small solenoid or indicator directly without an interposing relay — confirmed against the maximum load current entry — but for any inductive DC load, a free-wheel diode across the coil is still required downstream.
Environment and approvals
Rated NEMA 3/4X/12/13 and IP67, with an operating temperature range of -13 to 158 DEG F. Approvals on the nameplate are UL, CSA, and CE, which covers the common North American and EU panel-builder requirements; a separate RoHS / REACH dossier is not enumerated in this spec line and would need to be pulled from the Schneider declaration pack if your QA file requires it.
Mechanical and termination
Footprint is 3.1 in W × 1.5 in D × 3.9 in H in block format, with screw-terminal wiring on 4 conductors — sized for the storeroom shelf and field-replaceable with a screwdriver, no soldering iron required.