Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

Festo
Engineered by Festo, the part number 543863 is a magnetic reed industrial component featuring oil-resistant construction and a contact-based, bipolar N.O. contact switching output operating within an AC voltage range of 5 V to 30 V. This RoHS compliant device carries RCM compliance, c UL us - Listed (OL) certification, along with CE and UKCA markings compliant with applicable EU and UK EMC and RoHS directives. It operates across ambient temperatures from -40 °C to 70 °C with a max output current of 500 mA and a max switching capacity of 10 W for DC or 10 VA for AC. Submit the exact part number, quantity, and application requirements to receive a quote.
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Festo references — within one business day.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Festo 543863. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.