{"id":8039,"date":"2026-06-28T08:48:01","date_gmt":"2026-06-28T08:48:01","guid":{"rendered":"https:\/\/materialparts.com\/stps1045b\/"},"modified":"2026-06-28T11:35:38","modified_gmt":"2026-06-28T11:35:38","slug":"stps1045b","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/stps1045b\/","title":{"rendered":"STPS1045B"},"content":{"rendered":"<h2>STPS1045B Overview<\/h2>\n<p>The STPS1045B is an automotive-grade power Schottky rectifier from STMicroelectronics with 45V reverse voltage, 10A forward current, only 0.57V forward voltage drop, AEC-Q101 qualified, in a TO-247 package, suitable for automotive DC-DC converters and power polarity protection.<\/p>\n<h3>\u4e3b\u8981\u529f\u80fd<\/h3>\n<ul>\n<li>Reverse voltage: 45V<\/li>\n<li>Forward current: 10A<\/li>\n<li>Forward voltage drop: 0.57V<\/li>\n<li>Reverse leakage: 200uA<\/li>\n<li>Maximum junction temperature: 175C<\/li>\n<li>AEC-Q101 automotive qualified<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>STPS1045B Overview The STPS1045B is an automotive-grade power Schottky rectifier from STMicroelectronics with 45V reverse voltage, 10A forward current, only 0.57V forward voltage drop, AEC-Q101 qualified, in a TO-247 package, suitable for automotive DC-DC converters and power polarity protection. Key Features Reverse voltage: 45V Forward current: 10A Forward voltage drop: 0.57V Reverse leakage: 200uA Maximum [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,56],"tags":[],"chip_brand":[142],"class_list":["post-8039","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-mosfets","chip_brand-st"],"acf":{"brief_explanation":"10A, 45V Schottky rectifier, TO-220 dual diode","date_code":"","package_case":"TO-220 (10.0 x 8.7 x 4.6 mm, through-hole)","in_stock":4951,"datasheet":"https:\/\/www.st.com\/resource\/en\/datasheet\/stps1045b-y.pdf","price":"$0.85 @ 1ku","product_introduction":"The STPS1045B is a 10 A, 45 V Schottky rectifier from STMicroelectronics in a DPAK (TO-252) surface-mount package, designed for high-frequency switched-mode power supply applications. It features a low forward voltage drop of 0.50 V typical at 10 A and 125 C junction temperature, 175 C maximum junction temperature, and avalanche energy rating of 20 mJ for robustness against transient overvoltage. The guard-ring construction ensures reliable operation under surge conditions and the 3 C per watt junction-to-case thermal resistance enables efficient heat dissipation. Typical applications include output rectification, freewheeling diodes, reverse polarity protection, and battery charging circuits.","working_principle":"The STPS1045B is a Schottky barrier rectifier formed by a metal-semiconductor junction between a metal contact (typically chromium or molybdenum) and an N-type silicon epitaxial layer. Unlike conventional P-N junction diodes that rely on minority carrier injection, the Schottky junction conducts via majority carriers (electrons), eliminating reverse recovery charge and enabling extremely fast switching with negligible switching losses at high frequencies. The low forward voltage drop results from the lower barrier height of the metal-semiconductor junction compared to a P-N junction. The guard ring structure around the Schottky contact provides a resistive potential barrier that prevents localized electric field concentration at the junction periphery, improving reverse voltage withstand and surge current capability. The avalanche rating allows the device to absorb energy from voltage transients without failure, making it suitable for inductive load switching environments.","pin_description":"<table><tr><th>Pin<\/th><th>Name<\/th><th>Description<\/th><\/tr><tr><td>1<\/td><td>Cathode<\/td><td>Diode cathode; connected to the DPAK center lead and tab<\/td><\/tr><tr><td>2<\/td><td>Anode<\/td><td>Diode anode; connected to the DPAK outer leads<\/td><\/tr><tr><td>3<\/td><td>Cathode (Tab)<\/td><td>Thermal pad and cathode connection; solder to PCB copper pour for heat dissipation<\/td><\/tr><\/table><p>Package: DPAK (TO-252AA). Dimensions: 6.2 x 6.7 x 2.4 mm. The cathode tab is the primary thermal path and should be soldered to a copper pour for effective heat sinking. Pin 1 and Pin 3 are internally connected as cathode.<\/p>","application_scenarios":"<ul><li><strong>SMPS Output Rectification<\/strong>: Secondary side rectification in forward and flyback converters operating at 100 kHz to 1 MHz<\/li><li><strong>Freewheeling Diode<\/strong>: Catch diode across inductive loads in motor drive and solenoid control circuits<\/li><li><strong>Reverse Battery Protection<\/strong>: Series diode in automotive and industrial power inputs to prevent damage from reversed supply<\/li><li><strong>Battery Charger<\/strong>: Output rectification in high-frequency battery charging circuits requiring low forward loss<\/li><li><strong>OR-ing Diode<\/strong>: Power supply redundancy diode in N+1 power architectures for hot-swap servers<\/li><\/ul>","alternative_models":"<table><tr><th>Model<\/th><th>Manufacturer<\/th><th>VR<\/th><th>IF(AV)<\/th><th>VF<\/th><th>Package<\/th><th>Notes<\/th><\/tr><tr><td>STPS1045B-TR<\/td><td>STMicroelectronics<\/td><td>45 V<\/td><td>10 A<\/td><td>0.57 V<\/td><td>DPAK<\/td><td>Tape and reel version<\/td><\/tr><tr><td>MBRD1045CT<\/td><td>SMC Diode<\/td><td>45 V<\/td><td>10 A<\/td><td>0.55 V<\/td><td>DPAK<\/td><td>Direct substitute<\/td><\/tr><tr><td>SBR1045D1-13<\/td><td>Diodes Inc<\/td><td>45 V<\/td><td>10 A<\/td><td>0.52 V<\/td><td>DPAK<\/td><td>Super barrier rectifier<\/td><\/tr><tr><td>STPS10H100<\/td><td>STMicroelectronics<\/td><td>100 V<\/td><td>10 A<\/td><td>0.72 V<\/td><td>TO-220<\/td><td>Higher voltage option<\/td><\/tr><tr><td>MBR1045<\/td><td>onsemi<\/td><td>45 V<\/td><td>10 A<\/td><td>0.55 V<\/td><td>ITO-220<\/td><td>Through-hole version<\/td><\/tr><\/table>\n<p>STPS1045B is a 10A\/45V Schottky rectifier from ST in DPAK. The STPS10H100CG offers 100V rating for higher voltage applications. The MBRS1045T3G from onsemi provides 10A\/45V in D2PAK with AEC-Q101 qualification. The VS-STPS1045 from Vishay offers the same rating (note: Vishay version is obsolete, ST version remains active). For dual Schottky, STPS20H100CF provides 20A\/100V in D2PAK-3. The SS10P45 from Vishay offers 10A\/45V in SMA with lower current rating.<\/p>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8039","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=8039"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8039\/revisions"}],"predecessor-version":[{"id":8092,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8039\/revisions\/8092"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8039"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8039"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8039"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}