The SM15T33CAY from STMicroelectronics is a 1500W bidirectional Transil TVS diode designed to protect sensitive equipment against electrostatic discharges (IEC 61000-4-2) and electrical overstress (IEC 61000-4-4 and 4-5). With a 28.2V reverse standoff voltage, 31.3V minimum breakdown, and 45.7V maximum clamping voltage at 32.8A peak pulse current, this device provides robust transient protection in a SMC (DO-214AB) surface mount package. The CAY suffix indicates bidirectional operation with AEC-Q101 automotive qualification.<\/p>\n
| \u7c7b\u578b<\/td>\n | Bidirectional TVS<\/td>\n<\/tr>\n | |||||||||||||||||||
| Reverse Standoff Voltage (Vrwm)<\/td>\n | 28.2V<\/td>\n<\/tr>\n | |||||||||||||||||||
| Breakdown Voltage (VBR min)<\/td>\n | 31.3V @ IT=1mA<\/td>\n<\/tr>\n | |||||||||||||||||||
| Clamping Voltage (VC max)<\/td>\n | 45.7V @ IPP=32.8A<\/td>\n<\/tr>\n | |||||||||||||||||||
| Peak Pulse Current (IPP)<\/td>\n | 32.8A (10\/1000us)<\/td>\n<\/tr>\n | |||||||||||||||||||
| Peak Pulse Power<\/td>\n | 1500W (10\/1000us)<\/td>\n<\/tr>\n | |||||||||||||||||||
| Reverse Leakage Current<\/td>\n | <1uA @ Vrwm<\/td>\n<\/tr>\n | |||||||||||||||||||
| \u5de5\u4f5c\u6e29\u5ea6<\/td>\n | -55\u00b0C to +150\u00b0C (TJ)<\/td>\n<\/tr>\n<\/table>\n\u7279\u70b9<\/h2>\n\u5e94\u7528<\/h2>\nProduct Overview The SM15T33CAY from STMicroelectronics is a 1500W bidirectional Transil TVS diode designed to protect sensitive equipment against electrostatic discharges (IEC 61000-4-2) and electrical overstress (IEC 61000-4-4 and 4-5). With a 28.2V reverse standoff voltage, 31.3V minimum breakdown, and 45.7V maximum clamping voltage at 32.8A peak pulse current, this device provides robust transient protection […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[59,13],"tags":[],"chip_brand":[142],"class_list":["post-3645","post","type-post","status-publish","format-standard","hentry","category-bridge-rectifiers","category-integrated-circuits-ics","chip_brand-st"],"acf":{"brief_explanation":"1500W Bidirectional TVS Diode, 28.2V Vrwm, 45.7V VC, AEC-Q101, SMC Package","date_code":"","package_case":"SMC (DO-214AB), 6.73mm x 5.97mm x 2.25mm","in_stock":11661,"datasheet":"https:\/\/www.st.com\/resource\/en\/datasheet\/sm15t.pdf","price":"$0.52 @ 1ku","product_introduction":"The SM15T33CAY from STMicroelectronics is a 1500W bidirectional Transil TVS diode in a SMC (DO-214AB) surface mount package. Designed to protect sensitive electronic equipment from ESD, EFT, and surge events, it features a 28.2V reverse standoff voltage with 31.3V minimum breakdown and 45.7V maximum clamping voltage at 32.8A peak pulse current. The bidirectional configuration protects against both positive and negative transients on AC or DC lines. The AEC-Q101 qualification makes it suitable for automotive applications, particularly 24V bus protection. The planar technology provides excellent reliability and low leakage current below 1uA at standoff voltage.","working_principle":"The SM15T33CAY uses planar TVS technology with two back-to-back Zener structures for bidirectional clamping. Under normal operating conditions (voltage below Vrwm = 28.2V), the device presents a very high impedance with leakage current below 1uA, having negligible effect on the protected circuit. When a transient voltage exceeds the breakdown voltage (31.3V minimum), the device avalanches and clamps the voltage to a safe level (45.7V max at 32.8A). For bidirectional operation, both positive and negative transients are clamped symmetrically. The energy from the transient is absorbed by the device and dissipated as heat. After the transient subsides, the device automatically returns to its high-impedance state.","pin_description":"
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