Kühn Controls


Symbols, applications and coil features of RELECO Relays series MRC, QRC, IRC

General purpose relays A one changeover General purpose relays

They are used for most general applications, like us automation, pneumatic, eating appliances, signaling, as an input or output interface, etc.
Change-over contacts. Isolation between NO/NC: 1000 Vrms. contact gap: 0.5 mm.
Rating loads of up to:
16A @ 230V AC1
16A @ 30V DC1
0.5A @ 110V DC1
0.2A @ 220V DC1

Double make relays X Double make relays Double make relays

These relays are designed to switch high DC loads at voltages of 110 and 220 VDC.
They consists of one normally open contact with a gap of >3 mm so that the arc length is divided by two.
Isolation between contacts: >2000 Vrms.
The max. DC load is shown in the tables.
X versions are available in MR-C and QR-C type housing.

Sensitive relays S One change-over contact. Sensitive relays, 250 mW. One change-over contact.

Sensitive relays E Two change-over contacts Sensitive relays, 500 mW. Two change-over contacts.

Sensitive relays N Three change-over contacts Sensitive relays, 800 mW. Three change-over contacts.

DC relays adjusted to work at lower power, available in both MR-C and QR-C versions.
Gold-flashed contacts 0.2µ or plated 10µ Au (optional).
Operational voltage range:
S Relays: 0.8… 2.5 UN
E Relays: 0.8… 1.7 UN
N Relays: 0.8… 1.4 UN

Relays with power contact and twin contact for low signal H Relays with power contact and twin contact for low signal Relays with power contact and twin contact for low signal

The relay in the same unit combines the power of a standard model (A) and the contact reliability of a twin contact.
Specially designed for applications which require information back.

Solid state relays SS Solid state relays Solid state relays

Electronic switching relay where speed and the absence of mechanical parts making it suitable for long life.
Several models for different uses alternating current (AC) or direct current (DC).
p. ex. for switching resistive and inductive AC loads instantaneous,
for switching resistive lamps and AC loads synchronized to zero,
NPN terminal common 2 negative,
PNP terminal common 2 positive.

Relays with twin contacts T Relays with twin contacts Relays with twin contacts

These are used to switch low currents with high operational reliability.
Change-over contacts.
Isolation between NO/NC: 1000 Vrms.
Contact gap: 0.5 mm.
Gold-flashed contact 0.2μ or plated with 10μ Au (optional).
Maximum load: 6A @ 230V AC1
Minimum load: 1mA @ 5V DC1

Remanence relays R Remanence relays Remanence relays

A high remanence magnetic circuit allows the relay to latch positively when the current applied flows through the coil in a direction and delatches if the current flows in the opposite direction.
Electronic circuitry is added inside the relay to control this action and also protects against transient voltages.
There is one winding for AC coils and two windings for DC coils.
All coils withstand permanent connection.
The relay can be operated with pulses of 50 ms, minimum, at nominal voltage.

DC coil
Relays DC
AC coil
Relays AC

High inrush current relay W High inrush current relay High inrush current relay

Two open contacts, one for silver nickel and one of tungsten work in parallel but are physically displaced so that the tungsten contact makes and breaks the load.
The silver contact is used for carrying the stable current.
This relay was designed to switch incandescent and fluorescent lamps, (with power factor corrected), and DC inductive loads.
Only available in relays C7 type housing.
Maximum loads:
6A @ 230V AC5a/b (lamps)
10A @ 230V AC15
1.5A @ 110V DC1

Relays for railway applications RW Relays for railway applications Relays for railway applications

Designed to meet the demands of the railway, from the high voltage range, up to vibration and shock according EN 60077-1-2/99 and EN 61373/99 rules.

Relays with open contacts G Relays with open contacts Relays with open contacts

An open contact arrangement allows an increase in the contact gap,increasing the DC 'break capacity' without altering the AC performance.
Contact gap: 1.5 mm (QR-C types); 1.7 mm (MR-C types).
Isolation of contacts NO: > 2000 Vrms.
Maximum load:
16A @ 230V AC11
2A @ 110V DC1
0.4A @ 220V DC1

Relays with magnetic blow out M Relays with magnetic blow out Relays with magnetic blow out

These versions are similar to X types, however they have an addition of a powerful magnet which blows out the arc generated when the contacts are opened, therefore quenching the arcing quickly and increasing the contact life.
They are able to switch DC loads of up to:
10A @ 220V DC1
2A @ 220V DC13


The data referred to in the specifications for each model refers to typical values of "new" relays at 20º C, according to EN 60947.


The tables of electrical life and the tables of maximum DC current show the typical result of exhaustive test performed at an ambient temperature of 20º C, operating frequency of 1,200 operations / hour, and under permanent connection.
The switching current ratings specified in these pages refer to a minimum electrical life of 100,000 operations.

Margin of over-voltage

Coils withstand, on permanent connection, a maximum over-voltage of 110% UN, with rated current through the contacts at an ambient temperature of 60º C.

Custom relays

Relays with special specifications can be supplied after consultation with Kühn Controls AG.

You want more informations about RELECO Relays, please send us a fax: +49 (0)7082- 94 00 01, or email to: Inquiry to Kühn Controls… we help you…

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