Comus International Relays, Hg Wet Relays MSS4 / MVS4

MSS4 and MVS4 series are instrumentation-grade mercury wet reed relays with 1 Form A contact, designed for high-reliability switching. The MSS4 supports all-position mounting; the MVS4 is for vertical mounting only. Both measure 0.748 in long, 0.291 in wide, and 0.268 in high. They switch up to 50 W, 500 VDC, and 2 A, with a 3 A carry current. Contact resistance is ≤100 mΩ, operate time is 1.2 ms (MSS4) or 1.5 ms (MVS4), and release time is 1.0 ms for both. Operating temperature ranges from -25°C to +85°C. Life exceeds 1 billion operations at 1.0 V / 10 mA. Mercury content is 16 mg (MSS4) or 40 mg (MVS4). Dielectric strength is 2000 VDC between contacts and 1400 VDC between contacts and coil. An optional internal diode is available.