Fuse?

[JayMatt]

Can anyone tell me what size fuse this is? 

[WaynePierce]

Teeny-tiny! Now someone that is smart and not just a smart a$$ will chime in soon I'm sure.

 

[GeeBee]

Are you sure it is a fuse? Looks more like a diode

 

[Yetti]

It might be stamped on it.   Tell us what it is in and we can probably find the manual

[MikeOH]

Unclear to me it is blown (I can still see what looks like the fusible link...intact).

Have you checked with an ohmmeter?

[EricJ]

It would be pretty unusual for a fuse to have soldered leads rather than be easily changeable, so I suspect that isn't a fuse.   I'm an EE and I don't know what it is, but I wouldn't assume it's a fuse.

You'd have to take it out of the circuit to test it with a multimeter, so that's probably not convenient, either.

Is there a silk-screen marking near it anywhere that has a component designator?   Sometimes that will provide a clue as to what it is.    e.g., if it says D6 or something, it is likely a diode.

 

[Yetti]

7 hours ago, EricJ said:

It would be pretty unusual for a fuse to have soldered leads rather than be easily changeable, so I suspect that isn't a fuse.   I'm an EE and I don't know what it is, but I wouldn't assume it's a fuse.

You'd have to take it out of the circuit to test it with a multimeter, so that's probably not convenient, either.

Is there a silk-screen marking near it anywhere that has a component designator?   Sometimes that will provide a clue as to what it is.    e.g., if it says D6 or something, it is likely a diode.

 

I have seen board glass fuses in older stuff.   Usually a last line of defense type situation.    This one does not look blown.   

[JayMatt]

10 hours ago, MikeOH said:

Unclear to me it is blown (I can still see what looks like the fusible link...intact).

Have you checked with an ohmmeter?

No but if you look at it you can see it's blown. It's in a hoskins power supply for my strobe

[JayMatt]

8 hours ago, EricJ said:

It would be pretty unusual for a fuse to have soldered leads rather than be easily changeable, so I suspect that isn't a fuse.   I'm an EE and I don't know what it is, but I wouldn't assume it's a fuse.

You'd have to take it out of the circuit to test it with a multimeter, so that's probably not convenient, either.

Is there a silk-screen marking near it anywhere that has a component designator?   Sometimes that will provide a clue as to what it is.    e.g., if it says D6 or something, it is likely a diode.

 

I didn't see anything. I'm ordering new anyway but though a repair might be a suitable backup in a pinch. It's the power supply for my strobe

[spistora]

Kind of looks like this: https://www.ebay.com/itm/265588856868?chn=ps&_trkparms=ispr%3D1&amdata=enc%3A11vjAzp7CSze15vqd3xHazA28&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=265588856868&targetid=1599090336897&device=c&mktype=&googleloc=9024320&poi=&campaignid=15275224983&mkgroupid=131097072938&rlsatarget=pla-1599090336897&abcId=9300697&merchantid=6296724&gclid=Cj0KCQjw0umSBhDrARIsAH7FCofa4eo_crtctP5DhaZldMWW8owOCnYIsxiOZJ-ST057m4UNPPuGNn4aAmbcEALw_wcB

I was going to guess zener diode. 

 

[PT20J]

I’ve seen soldered in fuses in some power supplies. If it blew, something on the board failed and will need to be replaced or a replacement fuse will also blow. 

[MikeOH]

1 hour ago, Yetti said:

I have seen board glass fuses in older stuff.   Usually a last line of defense type situation.    This one does not look blown.   

Yep.  Axial leaded, PCB mounted, fuses were common; frankly, I've seen modern PCBs with SMD fuses, as well.  As you say, the kind of fuse that's never suppose to blow!  The odd thing is that the terminations look a bit different than what I've typically seen, so I'm not 100% certain it is a fuse.

Maybe the OP can see the link open, but from the fuzzy photo, I agree with you: doesn't look blown.

Sounds like the OP is going replace the supply. I suspect there's more wrong than the fuse if it's blown, anyway!

[MikeOH]

4 minutes ago, PT20J said:

I’ve seen soldered in fuses in some power supplies. If it blew, something on the board failed and will need to be replaced or a replacement fuse will also blow. 

Beat to it, again!  Just don't type as fast as I used to!

[Hank]

2 hours ago, MikeOH said:

Beat to it, again!  Just don't type as fast as I used to!

Blame it on the touchscreen and auto spelling changed! That's my excuse . . . .  

[JayMatt]

4 hours ago, MikeOH said:

Yep.  Axial leaded, PCB mounted, fuses were common; frankly, I've seen modern PCBs with SMD fuses, as well.  As you say, the kind of fuse that's never suppose to blow!  The odd thing is that the terminations look a bit different than what I've typically seen, so I'm not 100% certain it is a fuse.

Maybe the OP can see the link open, but from the fuzzy photo, I agree with you: doesn't look blown.

Sounds like the OP is going replace the supply. I suspect there's more wrong than the fuse if it's blown, anyway!

The picture on my phone looks clear but it uploads fuzzy for some reason. But yeah its 100% that diode or a diode. Can I replace that? Or just don't worry about it? Kinda wanna do it just to do it even if I don't use it ever. Just a learning exercise

[MikeOH]

27 minutes ago, JayMatt said:

The picture on my phone looks clear but it uploads fuzzy for some reason. But yeah its 100% that diode or a diode. Can I replace that? Or just don't worry about it? Kinda wanna do it just to do it even if I don't use it ever. Just a learning exercise

Well, without troubleshooting, randomly replacing a part is unlikely to fix the supply. Maybe it's a diode, but without more info it's hard to know for certain, and if it is, there are a million different types.  That is, the underlying reason for a part to fail catastrophically is commonly NOT the part itself but something else that cascaded into the visibly 'blown' component.  JMHO as a EE.

[carusoam]

Hmmmmmmmm.

1) Old Board level fixes can be tough…

2) The real problem probably hasn’t been found yet… lots of high voltage used in strobe power supplies…

3) Going LED is a common solution…. Find OSU for that…

4) Soooo many people have gone LED… they have generated a new CB solution….

5) CB solution… look for all the Whelen power supplies hitting the for sale section….

PP summary only…

Best regards,

-a-

[Yetti]

Just jumper it.  You will find the next thing that failed.   Probably the caps.  Remove from plane first.

[LANCECASPER]

21 hours ago, JayMatt said:

I didn't see anything. I'm ordering new anyway but though a repair might be a suitable backup in a pinch. It's the power supply for my strobe

I am certainly not qualified to tell you what you should and shouldn't work on, but with my limited experience in soldering on circuit boards (almost none), the last board I'd be learning on is a high voltage power supply for strobe lights. 

[Fly Boomer]

17 minutes ago, Yetti said:

Remove from plane first.

^^^ Yes, Please.

[N201MKTurbo]

It looks like a Bussman GFA series fuse. See the data sheet for the color code for the current rating.

https://xonstorage.blob.core.windows.net/pdf/Bussmann Eaton/2401911XON.pdf

 

[chrisk]

23 hours ago, JayMatt said:

No but if you look at it you can see it's blown. It's in a hoskins power supply for my strobe

Maybe it is blown, but maybe not.  I'd definitely check continuity with an ohm meter before replacing it.   A fuse like that can be tested in circuit in about 2 seconds.   And I also expect you could pick up a used supply for very little money.  Lots of folks are going with LEDs and the old supplies have to go somewhere.