Pepperl Fuchs NCN3-F31K-N5-K

Inductive sensor

MPN: NCN3-F31K-N5-K
Category: Inductive Sensors

Price and lead time confirmed within 1 business day

Discontinued by Pepperl Fuchs — we can still source the original NCN3-F31K-N5-K (new, used or refurbished, subject to availability). Request a quote below.

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1We check stock, condition and lead time
2You get a written quote by email
3Approve it and we ship — in-stock parts within 1 business day

12-month warranty (new) · 3-month (used/refurbished)
30-day returns, no restocking fee on unused parts
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What is the Pepperl Fuchs NCN3-F31K-N5-K?

Direct mounting on standard actuators

Fixed setting

2:1 transfer method

LEDs for switching state of sensor and solenoid valve

Valve LEDs disconnectable

ATEX & IECEX certifications

Extended temperature range, Valve position detection, Solenoid valve output, Suitable for 2:1 technology, Switching function: 2 x normally closed (NC), Output type: NAMUR, Installation: flush mountable, Output type: 2-wire, Construction type: Dual sensor, Series: Dual sensor, Suitable for 2:1 technology, Type of voltage: DC, Equipment protection level Ga: IECEx TUN 17.0021X, Equipment protection level Gb: IECEx TUN 17.0021X, Equipment protection level Mb: IECEx TUN 17.0021X

Pepperl+Fuchs has archived the NCN3-F31K-N5-K: it is no longer part of the current range. PartnerPLC sources discontinued Pepperl+Fuchs parts on the surplus market for maintenance and repair of existing installations — request a quote for availability, condition, price and lead time.

Specifications

General specifications

Order code (Pepperl+Fuchs part number)	233552
Switching function	2 x normally closed (NC)
Output type	NAMUR
Rated operating distance	3 mm sn
Installation	flush mountable
Assured operating distance	0 ... 2.4 mm sa
Actual operating distance	2.7 ... 3.3 mm typ. sr
Reduction factor rAl	0.35
Reduction factor rCu	0.3
Reduction factor r304	0.75
Reduction factor rSt37	1
Reduction factor rBrass	0.45
Output type	2-wire
Lifecycle	Discontinued — archived by Pepperl+Fuchs

Nominal ratings

Nominal voltage	8.2 V (Ri approx. 1 kΩ) Uo
Switching frequency	0 ... 3 kHz f
Hysteresis	typ. 5 % H
Short-circuit protection	yes
Suitable for 2:1 technology	yes , Reverse polarity protection diode not required
Current consumption: Measuring plate not detected	≥ 3 mA
Current consumption: Measuring plate detected	≤ 1 mA
Time delay before availability	≤ 1.1 ms tv
Switching state indicator	LED, yellow
Valve status indicator	LED, yellow

Safety-relevant product characteristics

MTTFd	1470 a
Mission Time (TM)	20 a
Diagnostic Coverage (DC)	0 %

Valve circuit

Voltage	max. 32 V DC
Current	max. 240 mA
Short-circuit protection	no
Reverse polarity protection	yes, with reversed output LED is out of function, therfore more power for solenoid valve

Compliance with standards and directives

Standard conformity: NAMUR	EN 60947-5-6:2000 IEC 60947-5-6:1999
Standard conformity: Electromagnetic compatibility	NE 21:2007
Standard conformity: Standards	EN IEC 60947-5-2

Approvals and certificates

IECEx approval: Equipment protection level Ga	IECEx TUN 17.0021X
IECEx approval: Equipment protection level Gb	IECEx TUN 17.0021X
IECEx approval: Equipment protection level Mb	IECEx TUN 17.0021X
ATEX approval: Equipment protection level Ga	TÜV 99 ATEX 1479 X
ATEX approval: Equipment protection level Gb	TÜV 99 ATEX 1479 X
ATEX approval: Equipment protection level Gc (ic)	PF13CERT2895 X
UL approval	cULus Listed Load Type: General Purpose Circuitry: Class 2 Power Source Enclosure Type Rating: Type 1 Supply/Switching Voltage: 8.2 V DC
Ordinary Location	E87056
Hazardous Location	E501628
Control drawing	116-0456

Ambient conditions

Ambient temperature	-25 ... 100 °C (-13 ... 212 °F)
Storage temperature	-40 ... 100 °C (-40 ... 212 °F)

Mechanical specifications

Connection (system side)	Cage tension spring terminals Stripped length 7 mm M20 x 1.5 cable gland usable thread length 11.5 mm screw-in depth max. 11.5 mm
Core cross section (system side)	1.5/2.5 mm2 flexible/rigid
Connection (valve side)	Cage tension spring terminals
Core cross section (valve side)	1.5/2.5 mm2 flexible/rigid
Housing material	PBT
Sensing face	PBT
Degree of protection	IP67
Tightening torque, fastening screws	≤ 5 Nm
Tightening torque, housing screws	1 Nm
Tightening torque, cable gland	M20 x 1.5 ; max. 7 Nm M12 x 1.5 ; max. 1.5 Nm
Dimensions: Height	35.5 mm
Dimensions: Width	65 mm
Dimensions: Length	77.5 mm
Note	LED switch-off

General information

Use in the hazardous area

see instruction manuals

Downloads & documentation

Official documents from Pepperl Fuchs, downloaded directly from the manufacturer.

Data sheets & manuals

CAD & dimension drawings

Certificates (5)

NCN3-F31K-N5-K: frequently asked questions

Can I still buy the NCN3-F31K-N5-K now that it is discontinued?

Yes. Pepperl Fuchs has discontinued the NCN3-F31K-N5-K, but sourcing discontinued parts is what PartnerPLC specialises in — new old stock, used and refurbished units. Request a quote and we'll confirm availability, condition and lead time.

When can NCN3-F31K-N5-K be shipped?

NCN3-F31K-N5-K is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up NCN3-F31K-N5-K in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for NCN3-F31K-N5-K and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for NCN3-F31K-N5-K, subject to availability and destination.