HIGH-SPEED, HIGH-CURRENT SURGE PROTECTORS PMT/UMT (275) Series DESCRIPTION CP Clare’s PMT(275) and UMT(275) Series surge protectors (350-500V and 550-2500V respectively) provide a high level of protection from high-speed, high-current transient surges. These devices are constructed using a proprietary semiconductor junction process which results in nanosecond response times combined with peak current ratings in excess of 20kA. APPLICATIONS FEATURES ■ Fast impulse breakdown (≤125% of typical DC breakdown at 5kV/µs) ■ Tight DC breakdown voltage tolerance (±10%) ■ Low capacitance ■ ■ ■ ■ Test equipment Video displays Medical electronics Instrumentation circuits STANDARD VOLTAGES Series DC Breakdown Unit Voltage (typ) PMT(275) 350 400 450 500 V V V V UMT(275) 550 600 650 750 800 V V V V V 850 1.0 1.5 2.0 2.5 V kV kV kV kV (See detailed specifications for more information.) www.cpclare.com 549 HIGH-SPEED, HIGH-CURRENT SURGE PROTECTORS PMT/UMT (275) Series SPECIFICATIONS All characteristics at 25˚C PMT(275)350 PARAMETER Device Specifications DC Breakdown Impulse Breakdown Insulation Resistance Capacitance Life Ratings Surge Life PMT(275)400 CONDITIONS SYMBOL MIN TYP MAX MIN TYP MAX UNITS 100V/s 5kV/µs 100V 1MHz VBD Vbd IR C 315 1010 - 350 - 385 750 4 360 1010 - 400 - 440 750 4 V V Ω pF 500 - - 500 - - surges 1kA (PW=20 µs) PMT(275)450 PARAMETER Device Specifications DC Breakdown Impulse Breakdown Insulation Resistance Capacitance Life Ratings Surge Life PMT(275)500 CONDITIONS SYMBOL MIN TYP MAX MIN TYP MAX UNITS 100V/s 5kV/µs 100V 1MHz VBD Vbd IR C 405 1010 - 450 - 495 750 4 450 1010 - 500 - 550 750 4 V V Ω pF 500 - - 500 - - surges 1kA (PW=20 µs) UMT(275)550 PARAMETER Device Specifications DC Breakdown Impulse Breakdown Insulation Resistance Capacitance Life Ratings Surge Life UMT(275)600 CONDITIONS SYMBOL MIN TYP MAX MIN TYP MAX UNITS 100V/s 5kV/µs 100V 1MHz VBD Vbd IR C 495 1010 - 550 - 605 688 4 540 1010 - 600 - 660 750 4 V V Ω pF 500 - - 500 - - surges 1kA (PW=20 µs) UMT(275)650 PARAMETER Device Specifications DC Breakdown Impulse Breakdown Insulation Resistance Capacitance Life Ratings Surge Life UMT(275)750 CONDITIONS SYMBOL MIN TYP MAX MIN TYP MAX UNITS 100V/s 5kV/µs 100V 1MHz VBD Vbd IR C 585 1010 - 650 - 715 813 4 675 1010 - 750 - 825 938 4 V V Ω pF 500 - - 500 - - surges 1kA (PW=20 µs) UMT(275)800 PARAMETER Device Specifications DC Breakdown Impulse Breakdown Insulation Resistance Capacitance Life Ratings Surge Life SYMBOL MIN TYP MAX MIN TYP MAX UNITS 100V/s 5kV/µs 100V 1MHz VBD Vbd IR C 720 1010 - 800 - 880 1000 4 765 1010 - 850 - 935 1063 4 V V Ω pF 500 - - 500 - - surges 1kA (PW=20 µs) North America: 1-800-CPCLARE 550 UMT(275)850 CONDITIONS Europe: 32-11-300868 Asia: 886-2-2523-6368 Japan: 81-3-3980-2212 HIGH-SPEED, HIGH-CURRENT SURGE PROTECTORS PMT/UMT (275) Series SPECIFICATIONS All characteristics at 25˚C PARAMETER Device Specifications DC Breakdown Impulse Breakdown Insulation Resistance Capacitance Life Ratings Surge Life UMT(275)1.0 UMT(275)1.5 CONDITIONS SYMBOL MIN TYP MAX MIN TYP MAX UNITS 100V/s 5kV/µs 100V 1MHz VBD Vbd IR C 0.9 1010 - 1.0 - 1.1 1.25 4 1.35 1010 - 1.50 - 1.65 1.88 4 kV kV Ω pF 1kA (PW=20 µs) - 500 - - 500 - - surges CONDITIONS SYMBOL MIN TYP MAX MIN TYP MAX UNITS 100V/s 5kV/µs 100V 1MHz VBD Vbd IR C 1.8 1010 - 2.0 - 2.2 2.5 4 2.25 1010 - 2.50 - 2.75 3.13 4 kV kV Ω pF 1kA (PW=20 µs) - 500 - - 500 - - surges UMT(275)2.0 PARAMETER Device Specifications DC Breakdown Impulse Breakdown Insulation Resistance Capacitance Life Ratings Surge Life MECHANICAL DIMENSIONS ORDERING INFORMATION DIMENSIONS mm (inches) Devices in the PMT/UMT(275) series with other breakdown voltages in the 350-2500V range are available upon request. 19.05 ± 0.76 (0.750 ± 0.030) A complete part number is represented by the digits below. Breakdown voltages are expressed in Volts for devices <1000V and kV for devices ≥1kV. For example, PMT(275)350 is a 350V PMT(275) series device, and UMT(275)2.0 is a 2kV UMT(275) series device. 1.93 ± 0.13 DIA. (0.076 ± 0.005) 4.75 ± 0.76 (0.187 ± 0.030) UMT(275)2.5 5.00 ± 0.76 MAX. (0.197 ± 0.030) PMT(275) XXX UMT(275) XXX UMT(275) X.X 8.00 ± 0.13 DIA. (0.315 ± 0.005) Series PMT(275) for 350-500 V for 550-850 V for 1.0-2.5 kV Breakdown Voltage See specification tables UMT(275) www.cpclare.com 551