Relay selection guide

Relay type

 Contacts

Rated current

 Remarks

 Mounting

AC1

Instantaneous relays

D

4CO

10A

Standard D

Plug-in (smitt-style)

D-B

4CO

10A

Standard D with option B (Magnetic arc blow-out)

Plug-in (smitt-style)

D-RB

3CO

10A

Standard D with magnetic arc blow-out & fast switching (option R & B)

Plug-in (smitt-style)

D-R

3CO

10A

Standard D with option R (including fast switching) 

Plug-in (smitt-style)

D-YB

2DM-DB

10A

Magnetic arc blow-out

Plug-in (smitt-style)

DGG

2CO

10A

Extreme sensitive coil

Plug-in (smitt-style)

D8

8CO

10A

8 Changeover contacts

Plug-in (smitt-style)

D-E

4CO

-

Gold plated contacts

Plug-in (smitt-style)

DI

2CO

10A

Current monitoring relay

Plug-in (smitt-style)

D-BX5

2NO+2NC

10A

Magnetic arc blow-out & contact gap 2mm

Plug-in (smitt-style)

D-YBX5

1DM-DB

10A

Magnetic arc blow-out & contact gap 4mm

Plug-in (smitt-style)

CU-G

2CO

6A

Universal relay DC coil

Plug-in Miniature / also avaliable in PCB

CU-W

2CO

6A

Universal relay AC coil

Plug-in Miniature / also avaliable in PCB

CU-B

2CO

8A

Universal relay with magnetic arc blow out DC coil

Plug-in Miniature / also avaliable in PCB

CU-C

2CO

8A

Universal relay with magnetic arc blow out AC coil

Plug-in Miniature / also avaliable in PCB

CU-A

2CO

6A

Universal relay wide coil voltage range DC coil

Plug-in Miniature / also avaliable in PCB

CU-D

2CO

6A

Universal relay wide coil voltage range AC coil

Plug-in Miniature / also avaliable in PCB

CU-U

1DM-DB

6A

Universal relay DM-DB contacts DC coil

Plug-in Miniature / also avaliable in PCB

CU-V

1DM-DB

6A

Universal relay DM-DB contacts AC coil

Plug-in Miniature / also avaliable in PCB

CU-I

1CO

6A

Universal relay current DC coil

Plug-in Miniature / also avaliable in PCB

A-400

4CO, DM-DB

8A

Safety / critial relay

Plug-in (mors-style)

B-400

4CO, DM-DB weld no transfer

12A

Safety / critial relay

Plug-in (mors-style)

AID

2CO

-

Earth leakage indication relay

Plug-in (smitt-style)

Latching / bistable relays

B-D

3CO+1NC

10A

Latching (magnetic) relay

Plug-in (smitt-style)

KDN

8CO

10A

Latching (machanical) relay

Plug-in (smitt-style)

KCS

2CO

6A

Latching (machanical) relay

Faston 2,8 x 0,8

KCD

2CO

6A

Latching (machanical) relay

Plug-in (smitt-style)

Pulse relays

IOD

 2NO, 2NC, 1NO OR 1NC

100 mA

Pulse transducing relay

Plug-in (smitt-style)

EIOD

2NO, 2NC, 1NO OR 1NC

100 mA

Pulse transducing relay

Plug-in (smitt-style)

Time relays

TDB2

2CO

6A

Time relay, delay on

Plug-in (smitt-style)

TDB4

4CO

10A

Time relay, delay on

Plug-in (smitt-style)

TDDB

4CO (2CO direct + 2CO time delayed)

8A

Time relay, delay on

Plug-in (smitt-style)

TDE

1CO + 1NO

6A

Time relay, delay off

Plug-in (smitt-style)

TDE3

3CO

10A

Time relay, delay off

Plug-in (smitt-style)

TDE4

4CO

10A

Time relay, delay off

Plug-in (smitt-style)

TDBE

2CO

6A

Time relay, delay on & off

Plug-in (smitt-style)

FDA

2CO

8A

Time relay, flashing

Plug-in (smitt-style)

FDA4

4CO

10A

Time relay, flashing

Plug-in (smitt-style)

FDC

2CO

6A

Time relay, flashing

Plug-in (smitt-style)

WDE4

4CO

10A

One shot relay

Plug-in (smitt-style)

WDDE

2CO+2NC

8A

One shot, on relay

Plug-in (smitt-style)

WDDF

2CO+2NC

8A

One shot, off relay

Plug-in (smitt-style)

Measuring & monitoring relays

UMD

1CO+1NO

6A

Voltage monitoring relay

Plug-in (smitt-style)

ACD

1CO+1NO

6A

Battery voltage monitoring relay

Plug-in (smitt-style)

SMD

1CO

2A

Current monitoring relay

Plug-in (smitt-style)