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I'm searching for a small switch to switch 400 V AC 50 Hz on 11 nF capacitive load. Switch would not be opened and closed often and continuous current would be under 2 mA. 2 resistors were added before the switch to limit the inrush current to 280 mA in worst case scenario.

Circuit

MOSFET SSR seems to be a good solution with low leakage current but I'm struggling to find one rated for peak 600 V and 300 mA. I found Broadcom ASSR-5211 (datasheet) but the maximum continuous current is 200 mA and there is no rating for peak current. Every other MOSFET SSR datasheet I've read also does not specify peak or inrush current (example from Vishay VOR1060M4).

Why are SSRs not rated for peak output current in the datasheet?

Maximum case temperature and output power dissipation is specified, should I use those in consideration for peak output current?

How can I be sure that the SSR wont burnout long-term?

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  • \$\begingroup\$ Welcome! "Switch would not be opened and closed often" How about a regular mechanical relay? \$\endgroup\$
    – winny
    Commented Oct 23 at 13:50
  • \$\begingroup\$ There is not enough space for a regular mechanical relay. \$\endgroup\$
    – DorianM
    Commented Oct 23 at 13:53
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    \$\begingroup\$ How much space do you have available? \$\endgroup\$
    – winny
    Commented Oct 23 at 13:54
  • \$\begingroup\$ Why not use two of the Broadcom devices each in series with 2 kohm but, overall both circuits wired in parallel? \$\endgroup\$
    – Andy aka
    Commented Oct 23 at 14:15
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    \$\begingroup\$ I see. Use two, one with inrush resistor and another one with straight connection? Turn on in sequence with some tens of ms of delay between them. Use only one with an NTC resistor? \$\endgroup\$
    – winny
    Commented Oct 24 at 8:28

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