This suppression diode has broken and when I inquired about it with the German manufacturer, they wanted me to replace the entire solenoid. (High initial cost + packaging + freight from Germany + etc.)
The spec sheet says the coil draws 10W @12v.
Can anybody give a replacement recommendation?
Does it matter which direction it is installed?
Thank You.

 

Just about any 1 amp fast recovery diode should do the job well. If the solenoid is operated more than once a second I would go with a higher current rating (2 to 3 amps) for margin.

 

Just about any 1 amp fast recovery diode should do the job well. If the solenoid is operated more than once a second I would go with a higher current rating (2 to 3 amps) for margin.

Can you give me a part number with which to order?

 

Some examples of diodes that should work fine, in order of price (low to high) from a S.E. Asia distributor. In single unit quantity they are all less than 40¢ (U.S.) and most less than 20¢
Any of the UF400X (UF4001 through UF4007)
1N4937
FR157-TR
1N4937
1N496
RGP10M
FR207
1N4735
BYV26E
FR302-R0
FR303-R0
MUR160RLG
EGP10GE-E3/54
MUR120RLG
MR856RLG
FR303G-K R0G
FR302G-K R0G
MUR115G
MUR460RLG
FR602
SF54

If the switch that drives the solenoid is not a semiconductor (Not a Transistor, MOSFET, etc.) then you can safely go for a 1N4001, about a penny each.

 

You shouldn't need a fast recovery rectifier (it's the turn-on time that's important and there is not much difference between a standard diode and a fast-recovery diode for that parameter).
A 1N400x should work fine for a value of 1 to 7 for x.

The diode direction is not arbitrary.
It must be connected with its cathode to the positive voltage to the relay coil.

 

Some examples of diodes that should work fine, in order of price (low to high) from a S.E. Asia distributor. In single unit quantity they are all less than 40¢ (U.S.) and most less than 20¢
Any of the UF400X (UF4001 through UF4007)
1N4937
FR157-TR
1N4937
1N496
RGP10M
FR207
1N4735
BYV26E
FR302-R0
FR303-R0
MUR160RLG
EGP10GE-E3/54
MUR120RLG
MR856RLG
FR303G-K R0G
FR302G-K R0G
MUR115G
MUR460RLG
FR602
SF54

If the switch that drives the solenoid is not a semiconductor (Not a Transistor, MOSFET, etc.) then you can safely go for a 1N4001, about a penny each.

Thank you very much!

 

You shouldn't need a fast recovery rectifier (it's the turn-on time that's important and there is not much difference between a standard diode and a fast-recovery diode for that parameter).
A 1N400x should work fine for a value of 1 to 7 for x.

The diode direction is not arbitrary.
It must be connected with its cathode to the positive voltage to the relay coil.

I understand. Thanks for the info.

 

Concidering how the diode is mounted over the structure, make an S bend to the leg.

 

If the diode see temperature extremes, then the "s" curve or a zigzag is a good idea to relieve stress in the lead. I wish I had thought of that!

 

Concidering how the diode is mounted over the structure, make an S bend to the leg.
View attachment 250560

Good idea. Relief of any tension due to expansion/contraction.