SMAJ28A-TR STMicroelectronics

SMAJ Transil Features Peak pulse power: 400 W (10/1000 s) A 2.3 kW (8/20 s) Stand off voltage range: from 5 V to 188 V K Unidirectional and bidirectional types Unidirectional Bidirectional Low leakage current: SMA 0.2 A at 25 C (JEDEC DO-214AC) 1 A at 85 C Operating T : 150 C j max High power capability at T : j max 270 W (10/1000 s) Description JEDEC registered package outline The SMAJ Transil series has been designed to Complies with the following standards protect sensitive equipment against electrostatic IEC 61000-4-2 level 4 discharges according to IEC 61000-4-2, and MIL STD 883, method 3015, and electrical over 15 kV (air discharge) stress according to IEC 61000-4-4 and 5. These 8 kV (contact discharge) devices are generally used against surges below IEC 61000-4-5 (see Table 3 for surge level) 400 W (10/1000 s). MIL STD 883G, method 3015-7 Class 3B Planar technology makes these devices suitable 25 kV HBM (human body model) for high-end equipment and SMPS where low Resin meets UL 94, V0 leakage current and high junction temperature are required to provide reliability and stability over MIL-STD-750, method 2026 solderability time. EIA STD RS-481 and IEC 60286-3 packing SMAJ are packaged in SMA (SMA footprint in IPC 7531 footprint accordance with IPC 7531 standard). TM: Transil is a trademark of STMicroelectronics July 2010 Doc ID 5544 Rev 12 1/10 www.st.com 10Characteristics SMAJ 1 Characteristics Table 1. Absolute maximum ratings (T = 25 C) amb Symbol Parameter Value Unit (1) P Peak pulse power dissipation T initial = T 400 W PP j amb T Storage temperature range -65 to +150 C stg T Operating junction temperature range -55 to +150 C j T Maximum lead temperature for soldering during 10 s. 260 C L 1. For a surge greater than the maximum values, the diode will fail in short-circuit. Table 2. Thermal resistances Symbol Parameter Value Unit R Junction to leads 30 C/W th(j-l) R Junction to ambient on printed circuit on recommended pad layout 120 C/W th(j-a) Figure 1. Electrical characteristics - definitions II II Symbol Parameter II II FF PPPP Unidirectional V Stand-off voltage RM V Breakdown voltage BR V Clamping voltage CL II RR VV VV VV VV FF VV CLCL BRBR RMRM VV VV VV VV I Leakage current V CLCL BRBR RMRM II RM RM RMRM II I Peak pulse current RMRM II PP RMRM VV VV VV RMRM BRBR CLCL II II RR RR T Voltage temperature coefficient V Forward voltage drop F Bidirectional R Dynamic resistance D II PPPP II PPPP Figure 2. Pulse definition for electrical characteristics Repetitive pulse current t = rise time (s) r t = pulse duration time (s) p t t p r 2/10 Doc ID 5544 Rev 12