Hydractive Suspension Ecu Solid State Relays, wholesale job lot of VN05N's

Is it for both series I and II?

And I'll need around 10 to 30 depending on price and p&p to Sweden

//Sven

Hi Sven,

Good question. I have a spare H2 (series 1) ECU at home. I'll open it up and check tonight.

The best price I can see so far is $1.78. I'll need to check on postage from the US though. Postage from UK to Sweden will be minimal because the parts don't weigh very much.

Cheers

noz

This post has been edited by noz on July 31, 2006 12:29 pm

Hi Noz

I opened up a series 1 ECU yesterday as part of my learning process on suspension ECU spares. I could only see 3 lead devices on the pcb. The spec from you shows a 5 lead device but a MOSFET is a 3 lead device. I will have to find a spare series 2 ECU that I can open up to check. How many leads were there on the devices you obtained when you did the last replacements please. I seem to recall a web site that I had seen details and photos of MOSFET replacement, any ideas where? Sorry to be working this one to death but I have the odd contact who deals in electronic surplus. I just need to be sure what I am looking for.

Regards

XMexc

Hi XMexc,

Please ignore all previous references to MOSFET's. Being non-electronic I have picked the name up from somewhere and been repeating it. Sorry if I've led you all astray. The VN05N is a 'High Side Smart Power Solid State Relay' manufactured by SGS Thomson or 'ST Microelectronics'. It would have been nice of ST to come up with a name which wasn't so much a mouthful. Do these devices have nicknames? Or an acronym?

The best I can do so far is £1.29 + VAT each with £7.50 P&P for 100 pieces. That equates to £1.59 each in my hands. Lets say £1.70 each plus postage at cost to send them anywhere. If you can find them cheaper then please advise accordingly.

I haven't confirmed yet but this is probably for the VN05N which sits at right angles to the pcb. The VN05N011Y sits parallel to the pcb and matches those found in the ecu. The last time I replaced mine I used VN05N's and made my own heat sink so the devices don't lie flat on the pcb. The pcb offers almost no heat sink. Having said that, I replaced them before I knew about the bust diodes in the electrovalves causing the problem. I suspect that the power dissipation when the diodes are OK is so small that the minimal heat sink surface probably suffices.

cheers

noz

This post has been edited by noz on July 31, 2006 01:46 pm

I have both HI and HII ECU's to spare so I can do a comparasiong (spelling??) this evening.........When I'm ready with the poor bastard thats stopping by with a 93 TCT that has been on "fire". It seems to have been a coolant leak but .... that can't catch fire, can it? He did see flames

//Sven

This post has been edited by ds23 on July 31, 2006 01:47 pm

Hi Sven,

Sounds more like a fuel leak. Be very careful when looking for the problem. Make sure you have a Fire Extinguisher ready.

cheers

noz

And now we where of topic

Cant be. The fire did go out by itself. Had it been petrol he wouldn't have any car left now.

Hi Noz and All

My research gets more interesting. I have now had a look inside a Mk1 suspension ECU. I cannot find any 5 pin devices in there. I suspect that Mk1 ECU's have 3 pin MOSFET's and Mk2 ones the solid state 5 pin relays. These latter items also look from the spec sheet as though they are manufactured with inbuilt diode protection. I will have to find a Mk2 suspension ECU and take this to bits. It seems that Mk1 and Mk2 suspension ECU's may well be of different construction. Anyone know if they are interchangable between types of car?
Will report progress.

Regards

XMexc

Jupp they're different. You just got one elektrovalve in I but two in II. Moreover there is a considerable change in behaviour between I and II. Interesting... I knew that there was diffeerences between I and II but not this profound now that I have had the possibility to also look at a series I with hydraactive. (My new plaything a 92 V6 24V )

And yes it's only in series II you got the VN05

Any news? I'll definently need some

Ok, the best I can do is £1.80 + VAT each for an exact match for the ones fitted from new. The ones at £1.29 + VAT were the kind with straight legs which would then sit at right angles to the PCB. These were cheaper but then people might not buy them because they were different to the originals. I think the safe bet is to match exact.

I'm about to buy 56 (all they had in stock) of them so I'll report back when I've got them.

Cheers

noz

Wait a minute! they take 0.51£ (+VAT!!) for bending the legs? With a small pliers you get the same result. How many of that type did they have in stock? I could be intressted in thoose also. While your ordering so.......

This post has been edited by ds23 on August 16, 2006 07:49 am

Hi Noz

Just to confirm. If you go ahead with the purchase of the 56 identical devices I will take at least the 20 that I put down for earlier. I am happy pay extra not to have to reset the legs just in case the devices do have MOSFETS as part of the internal circuit. This is because of the exceptional static pecautions necessary when handling MOSFET components.

Regards

XMexc

I have a workplace thats ecuiped to handle ESD sensitive components so if there is a demand for more than 56pc I gladly take all or some of mine 30 with straight legs.

This post has been edited by ds23 on August 16, 2006 12:20 pm

Well, I can still get the straight legged ones for £1.29 +VAT each. I didn't think there would be as big a demand from people who wouldn't have the confidence to bend the legs themselves. If the consensus is that straight legged is OK then I'll buy those instead.

I actually fitted straight legged versions to my last ecu without bending the legs. The VN05N's stuck out from the PCB at right angles which allowed the fitting of a heat sink to the devices. Having thought about it more carefully I should have added some expanding foam or something to stop the things wobbling about with the vibrations of the car. I'll go back and do that.

Can someone put the MOSFET thing to bed? Due to my lack of electronic knowledge I was calling the devices MOSFETs in error. That's entirely my fault. If MOSFET's have nothing to do with VN05N's then can we stop talking about them because any other non-electronically minded people reading this post are going to be as confused as me

If we can come to a conclusion on this I will order them this afternoon. As an aside, if some of you are electronically minded either by hobby or by profession, don't you have access to electronic components? All I've done is search the web and phone a couple of hundred people, all from a private point of view and not a company point of view. Does anyone have any ideas to beat a price of £1.29 each?

cheers

noz