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| MDE Semiconductor, Inc. 78-150 Calle Tampico, Unit 210, La Quinta, CA., USA 92253 Tel : 760-564-8656 * Fax : 760-564-2414 1-800-831-4881 Email: sales@mdesemiconductor.com Web: www.mdesemiconductor.com MAXPak TM Series MAX-277 HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR FEATURES * UL 1449 Recognition * 6.5KA Surge Capability @ 8 x 20 sec waveform (per IEC- 61000-4-5) * Peak Power Dissipation 288KW * Bi-directional * Excellent clamping capability * Repetition rate (duty cycle): 0.05% * Sharp breakdown voltage * Low incremental surge resistance * Fast response time: typically less than 1.0 s from 0 Volts to BV * Operation temperature: -40C to +125C MAX-277 * Epoxy encapsulated package has Underwriters Laboratory Flammability Classification 94 V-0 MECHANICAL DATA Terminal: Ag Plated Axial leads, solderable per MIL-STD-750. Method 2026 Mounting Position: Any Weight: 0.328 0.033 ounces (9.300 0.930 g) MAXIMUM RATINGS AND CHARACTERISTICS Ratings at 25 C ambient temperature unless otherwise specified. RATING Reversed Standoff Voltage Breakdown Voltage @ IT=1.0mA Clamping Voltage @ 434.3A / 10x1000 sec waveform Reverse Leakage @ 241V SYMBOL Vrwm Vbr Vc IR VALUE 241 277 5% 368.4 max 20 max UNITS Volt Volt Volt A 07/28/09 MDE Semiconductor, Inc. 78-150 Calle Tampico, Unit 210, La Quinta, CA., USA 92253 Tel : 760-564-8656 * Fax : 760-564-2414 1-800-831-4881 Email: sales@mdesemiconductor.com Web: www.mdesemiconductor.com MAXPakTM 277 Series Rating and Characteristic Curves Pppm 1 PEAK PULSE POWER 1 KW 10000 1000 Non-repetitive pulse waveform shown in Fig. 3TA= 25C 100 10 1 0.1 1 10 100 1,000 10,000 100,000 td PULSE WIDTH 1 sec FIG. 1 PEAK PULSE POWER RATING 100 87.5 Fig.2 - Pulse Derating Curve Peak Pulse Power (PPP) or Current (IPP) Derating in 75 62.5 50 37.5 25 12.5 0 0 25 50 75 100 125 150 175 200 TA - Ambient Temperature (C) 150 IPPM - Peak Pulse Current,% tr = 10sec. Peak Value IPPM Half Value- IPPM 2 100 TJ = 25C Pulse Width(td)is defined as the point where the peak current decays to 50% of IPPM IRSM 50 10/1000sec.Waveform as defined by R.E.A. td 0 0 1.0 2.0 3.0 t - Time(ms) 3.0 4.0 4.0 Fig.3 - Pulse Waveform 7/28/2009 |
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