Industrial Relays

Altech Industrial & Interface Relays include electromechanical, miniature, slimline, and bistable options with DIN rail or socket mounting, LED indicators, and contact flexibility.

Altech Industrial Relays span a wide offering: from photovoltaic/EV relays (RS series) to full-featured electromagnetic relays (R2, R3, R4 series and variants), miniature relays (RM series), slimline interface relays (RM699B, RSR30), and subminiature/special modules (PI6, PIR6W, etc.).

One notable innovation is their bistable (energy-saving) relay series (R2B, R3B, R4B), which require power only to switch states and hold their position magnetically without continuous coil energization.

Key features and capabilities include:

Wide variety of contact configurations (DPDT, 3PDT, 4PDT)
AC and DC coil voltages, from low volts up into 220 V DC or higher
Optional LED indicators, test buttons, and versions with built-in surge suppression (diode or varistor)
Use of cadmium-free, silver-nickel (AgNi) contact materials for better environmental compliance and durability
DIN-rail or plug-in socket mounting options for flexible installation
Support for UL and CSA recognition, and compliance with RoHS2 / REACH environmental standards

Altech’s industrial relays cater to applications in automation, control systems, safety circuits, power switching, and more—offering both conventional and advanced relay types to meet diverse design and performance needs.

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Industrial Electromagnetic Relays

Industrial electromagnetic relays are used mainly in industrial and power automation applications, in signaling controls, safety and protection systems and control and electric drives systems.

DPDT, 3PDT and 4PDT contact configuration
Built in LED light indicator (L)
DC Coil voltages from 5VDC to 220V DC
Surge suppression element with diode (D) or varistor (V)
AC coil voltages from 6VAC to 240V AC 50/60 Hz
Approved for railroad applications (DE)
Din Rail Plug in Socket are standard
Silver Nickel (AgNi) cadmium free contact material
Rated load current:
5A/250V AC to 16A/250V AC rating
5A/24V DC to 16A/24VDC DC1 rating
UL and CSA recognized relays
ROHS2 and REACH compliance
Test button with (K) or without block function (W)

Miniature Electromagnetic Relays

Miniature electromagnetic relays are used in many interface applications, standard automation projects, lighting control systems, emergency lighting applications, building application projects, food processing equipment control and many other electrical system applications.

Standard SPDT, DPDT contact configuration
Rated load current:
8A/250V AC (DPDT) or 16A/250V AC (SPDT) rating;
8A/24V DC (DPDT) or 16A/24VDC (SPDT) DC1 rating
DC Coil voltages from 3VDC to 110V DC
AC coil voltages from 12VAC to 240V AC 50/60 Hz
Silver Nickel (AgNi) cadmium free contact material
PCB mounting with socket or direct PCB solder
UL and CSA recognized relays
Din Rail Plug in Socket are standard
ROHS2 and REACH compliance

Slimline Interface Relays

Slimline interface relays are used for PLC system and industrial automation applications, panel builders, machinery builders, time relays, office equipment and other applications that require a high switching capability in a small space.

Standard SPDT contact configuration
6A / 250V AC or 0.05A / 30V AC gold plated) rating
Standard 5 mm width
6A / 24V DC or 0.05A / 36V DC gold plated) rating
DC Coil voltages from 5VDC to 60V DC
4A max for Solid state relays
Vertical or Horizontal configuration
Silver Tin Oxide (AgSnO2) cadmium free contact material
Sealed for Soldering and cleaning
Gold plated contact (AgSnO2/Au 3µm) available
Can be used with Din rail socket or PCB mountable
UL recognized
Rated load current
ROHS2 and REACH compliance

Subminiature Electromagnetic and Solid State Modules

Subminiature electromagnetic relays are used for PLC systems and industrial automation applications, panel builders, equipment builders and other applications that require a high switching capability in a small space. The Altech slim line interface relays can be used as a universal interface between the controller and the actuator to switch loads between 1 mA and 6A. They are available with electromechanical contacts or solid state configuration. Installation time is greatly reduced when a pre-assembled relays and sockets combination is used. Replacement relays and sockets are available from stock. Additional accessories include colored coded jumpers, spacers and markers (unmarked or marked based on the customer specification) for identification purposes.

Standard SPDT contact configuration
Rated load current
Space-saving 6.2 mm width
6A / 250V AC or 0.05A / 30V AC gold plated) rating
Only 85 mm in height from DIN rail
6A / 24V DC or 0.05A / 36V DC gold plated) rating
DC Coil voltages from 5VDC to 110V DC
4A max for Solid state relays
AC coil voltages from 6VAC to 240V AC 50/60 Hz
Silver Tin Oxide (AgSnO2) cadmium free contact material
Pre-assembled relay and DIN mount socket
Gold plated contact (AgSnO2/Au 3µm) available
Screw clamp or Spring clamp terminals • UL recognized
Universal AC/DC socket with built-in surge suppression and green LED
ROHS2 and REACH compliance

Miniature Electromagnetic Relays

Compact relays with general application, featuring cadmium-free contacts and AC/DC coils. These relays can be used with plug-in sockets, mounted on a 35 mm rail, or on a panel. They come with standard features such as a mechanical indicator and a lockable front test button. Additionally, relays can be equipped with test buttons (without latching) and plugs. These relays adhere to the railway standards set by AUCOTEAM GmbH Berlin.

Bistable Relays

The R2B, R3B, and R4B bistable relays expand the R2, R3, and R4 family with energy-saving functionality. Unlike traditional relays that require continuous coil power, these bistable relays only use energy during switching, maintaining two stable states (open or closed). They are compatible with R2N, R3N, and R4N sockets, operate on DC supply, and feature permanent magnet design for continuous operation.

Applications include: