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: [email protected] Web: www.mdesemiconductor.com MAXPak ™ Series MAX-277 HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR FEATURES • UL 1449 Recognition • 6.5KA Surge Capability @ 8 x 20 µsec waveform (per IEC- 61000-4-5) • Peak Power Dissipation 288KW • Bi-directional MAX-277 • Excellent clamping capability • Repetition rate (duty cycle): 0.05% • Sharp breakdown voltage • Low incremental surge resistance • Fast response time: typically less than 1.0 µs from 0 Volts to BV • Operation temperature: -40°C to +125°C • 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 25º C ambient temperature unless otherwise specified. RATING SYMBOL VALUE UNITS Vrwm 241 Volt Breakdown Voltage @ IT=1.0mA Vbr 277 ± 5% Volt Clamping Voltage @ 434.3A / 10x1000 µsec waveform Vc 368.4 max Volt Reverse Leakage @ 241V IR 20 µ max A Reversed Standoff Voltage 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: [email protected] Web: www.mdesemiconductor.com MAXPak™ 277 Series 10000 Non-repetitive pulse waveform shown in Fig. 3TA= 25ºC 1000 100 10 1 0.1 1 10 100 1,000 10,000 100,000 td PULSE WIDTH 1 µsec FIG. 1 PEAK PULSE POWER RATING Fig.2 - Pulse Derating Curve 100 Peak Pulse Power (PPP) or Current (IPP) Derating in 87.5 75 62.5 50 37.5 25 12.5 0 0 25 50 75 100 125 150 175 200 TA - Ambient Temperature (°C) 150 tr = 10μsec. Peak Value IPPM 100 Half Value- IPPM 2 IRSM IPPM - Peak Pulse Current,% Pppm 1 PEAK PULSE POWER 1 KW Rating and Characteristic Curves TJ = 25°C Pulse Width(td)is defined as the point where the peak current decays to 50% of IPPM 10/1000μsec.Waveform as defined by R.E.A. 50 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