# Proximity Sensor, 35 mm, 40 x 40 x 65 mm, NPN, 10 VDC to 65 VDC, SIEF Series

![Product image](https://novapart.co/image/farnell:3906444/)

**URL**: https://novapart.co/products/538342/proximity-sensor-35-mm-40-x-65-npn-10-vdc-to-sief
**SKU**: 538342
**Manufacturer**: FESTO
**Category**: Sensors & Transducers || Sensors || Proximity Sensors / Proximity Switches || Inductive Proximity Sensors
**Price**: €84.1600
**Stock**: 10+
**Lead Time**: 36 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2020) |
| Product Range | SIEF Series |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3906444/)

## **Proximity sensor SIEF-Q40S-NA-S-2L** 

Part number: 538342 

> General operating condition ~~—~~ 

## **Data sheet** 

|**Feature**|**Value**|
|---|---|
|Design<br>~~Cn~~|Square<br>~~Cn~~|
|Conforms to standard<br>~~Cf~~|EN 60947-5-2<br>~~Cf~~|
|Symbol|00991709|
|CE marking (see declaration of conformity)|As per EU EMC directive<br>As per EU low voltage directive<br>As per EU RoHS directive|
|UKCA marking (see declaration of conformity)|To UK RoHS instructions<br>To UK instructions for electrical equipment|
|Measuring principle<br>~~a~~|Inductive<br>~~a~~|
|Rated operating distance<br>~~Ce~~|35 mm<br>~~Ce~~|
|Assured operating distance<br>~~Ce~~|28.35 mm<br>~~Ce~~|
|Reduction factors|Aluminum = 1.0<br>Stainless steel St 18/8 = 1.0<br>Copper = 1.0<br>Brass = 1.0<br>Steel St 37 = 1.0|
|Ambient temperature<br>~~GO~~|-30 °C ... 85 °C<br>~~GO~~|
|Repetition accuracy<br>~~Ce~~|0.7 mm<br>~~Ce~~|
|Switching output<br>~~Ce~~|NPN<br>~~Ce~~|
|Switching element function<br>~~Ce~~|Antivalent<br>~~Ce~~|
|Hysteresis<br>~~Cf~~|1.05 mm ... 5.25 mm<br>~~Cf~~|
|Max. switching frequency DC<br>~~Cf~~|250 Hz<br>~~Cf~~|
|Max. output current<br>~~Ce~~|200 mA<br>~~Ce~~|
|Voltage drop<br>~~Ce~~|≤1.8 V<br>~~Ce~~|
|Short-circuit protection<br>~~Ce~~|Pulsed<br>~~Ce~~|
|DC operating voltage range<br>~~Ce~~|10 V ... 65 V<br>~~Ce~~|
|Residual ripple<br>~~Ce~~|10%<br>~~Ce~~|
|Idle current<br>~~Ce~~|≤15 mA<br>~~Ce~~|
|Reverse polarity protection<br>~~Ce~~|for all electrical connections<br>~~Ce~~|
|Electrical connection|M12x1<br>Plug|
|Electrical connection 1, connection type<br>~~Cf~~|Plug<br>~~Cf~~|
|Electrical connection 1, connection technology<br>~~Ce~~|M12x1 A-coded as per EN 61076-2-101<br>~~Ce~~|
|Electrical connection 1, number of pins/wires<br>~~Ce~~|4<br>~~Ce~~|
|Electrical connection 1, type of mounting<br>~~Ce~~|not rotatable<br>~~Ce~~|
|Electrical connection 1, type of mounting<br>~~Ce~~|Compatible with rotatable screw-type lock<br>~~Ce~~|
|Size<br>~~Ce~~|40x40x65 mm<br>~~Ce~~|
|Type of mounting<br>~~Ce~~|With through-hole<br>~~e~~|



6/3/26 - Subject to change - Festo SE & Co. KG 

1/2 

|**Feature**|**Value**|
|---|---|
|Mounting type|Partially flush|
|Product weight|156 g|
|Housing material|PBT-reinforced|
|Ready status indication|Green LED|
|Switching status indication|Yellow LED|
|Degree of protection|IP67|
|Resistance to interference from magnetic fields|Magnetic direct and alternating fields|
|Corrosion resistance class (CRC)|0 - No corrosion stress|
|LABS (PWIS) conformity|VDMA24364 Zone III|
|Selection of additional sensor information|with reduction factor 1 – resistance to magnetic fields|
|Electrical output|NPN|
|Selection of sensor version|Standard|



6/3/26 - Subject to change - Festo SE & Co. KG 

2/2 



## Links

- [View this product on Novapart](https://novapart.co/products/538342/proximity-sensor-35-mm-40-x-65-npn-10-vdc-to-sief)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/festo/538342/sief-q40s-na-s-2l-proximity-sensor/dp/3906444)
---

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