Festo 574339 SMT-8M-A-NS-24V-E-0,3-M8D – Magnetoresistive Proximity Sensor, T-Slot, NPN, M8
The Festo 574339 (type SMT-8M-A-NS-24V-E-0,3-M8D) is a magnetoresistive proximity sensor that detects piston position on pneumatic actuators with a T-slot. It drops into the slot from above and is fixed with a screw, so you can fit or move it without taking the cylinder apart. It has an NPN normally open (N/O) output on 5–30 V DC. That makes it the right choice for controllers and machines that use sinking (NPN) inputs, which are common on Asian and some North American control systems.
It comes with a short 0.3 m PUR cable and an M8x1 3-pin plug with screw lock, so replacement is quick. The cable is suitable for energy chains and robot applications. IP65, IP68 and IP69K protection, a temperature range of −40 to +85 °C, short-circuit and reverse-polarity protection and cULus listing make it a robust choice for automation, handling, packaging and food-related machinery.
What the Part Number Means
- 574339: Festo part number
- SMT-8M-A: proximity sensor, magnetoresistive, for T-slot mounting (generation A)
- NS: NPN switching output, normally open
- 24V: rated operating voltage 24 V DC
- E: with LED status indicator
- 0,3: 0.3 m cable
- M8D: M8 plug, 3-pin
Key Features
- Sensing principle: magnetoresistive, wear-free
- Mounting: inserted into the T-slot from above, screw-fixed
- Output: NPN, normally open
- Supply: 5–30 V DC (24 V DC rated)
- Connection: 0.3 m cable with M8 3-pin plug, screw lock, in-line exit
- Protection: IP65, IP68, IP69K; short-circuit and reverse-polarity protected
- Indicators: yellow LED (switching status) and orange LED (operating reserve)
Key Specifications (Festo 574339)
- Type: SMT-8M-A-NS-24V-E-0,3-M8D
- Design: for T-slot
- Measuring principle: magnetoresistive
- Measured variable: position
- Switching output: NPN
- Switching element function: N/O contact
- Rated operating voltage: 24 V DC
- Operating voltage range: 5–30 V DC
- Max. output current: 100 mA (also in mounting kits)
- Max. switching capacity: 2.8 W DC
- Voltage drop: < 1.5 V
- Max. switching frequency: 180 Hz
- Switch-on / switch-off time: ≤ 1.3 ms / ≤ 1.4 ms
- Short-circuit protection: yes
- Reverse-polarity protection: for all electrical connections
- Indicators: yellow LED status, orange LED operating reserve
- Electrical connection: cable with M8x1 A-coded plug, 3-pin, screw lock, in-line exit
- Cable: 0.3 m, TPE-U (PUR), grey, energy chain and robot suitable
- Mounting: screw-clamped in slot, inserted from above (max. 0.6 Nm)
- Housing: nickel-plated brass, reinforced PA, high-alloy stainless steel; black
- Weight: 8.9 g
- Ambient temperature: −40 to +85 °C (−20 to +85 °C with moving cable)
- Degree of protection: IP65, IP68, IP69K
- Cleanroom class: ISO 14644-1 class 4
- Special features: oil resistant; halogen-free; PWIS-free (VDMA 24364-B2-L)
- Approvals / conformity: cULus Listed (UL E232949), RCM, KC-EMC, CE, UKCA, EN 60947-5-2, RoHS
Typical Applications
- End-position sensing on pneumatic cylinders with T-slot
- Machines and controllers using NPN (sinking) inputs
- Position detection on grippers, slides and semi-rotary drives
- Packaging and food-related machinery requiring IP69K
- Like-for-like replacement where Festo 574339 / SMT-8M-A-NS-24V-E-0,3-M8D is specified
Buy the Festo 574339 from Atlantech Drives
Atlantech Drives supplies the Festo 574339 SMT-8M-A NPN proximity sensor with fast worldwide shipping and a 12-month warranty. Our experienced sales team can also quote the PNP version (574334), matching M8 cables and other Festo pneumatic components. Request a quote today for price and availability.
More Festo Products
- Festo 10418 SME-1-LED-24 Proximity Sensor
- Festo 1463475 DSBC Standard Cylinder
- Festo 8162829 SFAB Flow Sensor
- All Festo products
Manufacturer website: Festo
Keyword Synonyms
- 574339 / SMT-8M-A-NS-24V-E-0,3-M8D / SMT-8M-A-NS-24V-E-0.3-M8D
- Festo 574339 proximity sensor
- Festo SMT-8M-A T-slot sensor NPN N/O
- Festo NPN cylinder position sensor M8 3-pin, 0.3 m
- Festo magnetoresistive proximity switch 24 V, IP69K
- Festo SMT-8M-A-NS sinking output sensor
- Festo Näherungsschalter SMT-8M-A-NS-24V-E-0,3-M8D / sensor de proximidad Festo 574339
