{"id":3792,"date":"2026-06-08T03:45:09","date_gmt":"2026-06-08T03:45:09","guid":{"rendered":"https:\/\/materialparts.com\/rb751v40t1g\/"},"modified":"2026-06-08T03:45:09","modified_gmt":"2026-06-08T03:45:09","slug":"rb751v40t1g","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/rb751v40t1g\/","title":{"rendered":"RB751V40T1G"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The RB751V40T1G from onsemi is a 30V\/30mA Schottky barrier diode in a SOD-523 (0603) surface-mount package, designed for high-speed switching and low-forward-voltage rectification.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u7c7b\u578b<\/td>\nSchottky Barrier Diode (SBD)<\/td>\n<\/tr>\n
Reverse Voltage (VR)<\/td>\n30V<\/td>\n<\/tr>\n
Forward Current (IF)<\/td>\n30 mA<\/td>\n<\/tr>\n
Forward Voltage (VF)<\/td>\n0.37V (typ @ IF=1mA)<\/td>\n<\/tr>\n
Reverse Current (IR)<\/td>\n1 uA (max @ VR=25V)<\/td>\n<\/tr>\n
Junction Capacitance<\/td>\n1.5 pF (typ @ 1MHz, VR=1V)<\/td>\n<\/tr>\n
Reverse Recovery Time<\/td>\nnegligible (Schottky)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOD-523 \/ 0603 (1.6 x 0.8 x 0.6mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-55 to +150 C (TJ)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Ultra-low 0.37V forward voltage at 1mA<\/li>\n
  • 30V reverse voltage rating<\/li>\n
  • 1.5pF low junction capacitance<\/li>\n
  • 1uA maximum reverse leakage<\/li>\n
  • Sub-nanosecond switching speed<\/li>\n
  • Tiny SOD-523 (0603) footprint<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Small-signal rectification<\/li>\n

RF detector and mixer<\/td>\n<\/tr>\n
Clamping and protection<\/td>\nLogic level shifting<\/td>\n<\/tr>\n<\/table><\/ul>","protected":false},"excerpt":{"rendered":"

Product Overview The RB751V40T1G from onsemi is a 30V\/30mA Schottky barrier diode in a SOD-523 (0603) surface-mount package, designed for high-speed switching and low-forward-voltage rectification. Key Specifications Type Schottky Barrier Diode (SBD) Reverse Voltage (VR) 30V Forward Current (IF) 30 mA Forward Voltage (VF) 0.37V (typ @ IF=1mA) Reverse Current (IR) 1 uA (max @ […]<\/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":[57,13],"tags":[],"chip_brand":[144],"class_list":["post-3792","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","chip_brand-on"],"acf":{"brief_explanation":"30V\/30mA Schottky diode, 0.37V VF, 1.5pF, SOD-523 (0603)","date_code":"","package_case":"SOD-523 \/ 0603 (1.6 x 0.8 x 0.6 mm)","in_stock":11820,"datasheet":"https:\/\/www.onsemi.com\/pub\/Collateral\/RB751V40-D.PDF","price":"$0.03 @ 1ku","product_introduction":"The RB751V40T1G from onsemi is a small-signal Schottky barrier diode in an ultra-compact SOD-523 (0603-equivalent) surface-mount package. The Schottky barrier metal-silicon junction provides an exceptionally low forward voltage drop of 0.37V typical at 1mA forward current, significantly lower than conventional silicon P-N junction diodes (typically 0.6-0.7V at the same current). This low VF makes the RB751V40T1G ideal for small-signal rectification and clamping applications where minimizing voltage drop is critical, such as in low-voltage logic circuits, battery-powered devices, and signal conditioning. The 30V reverse voltage rating is adequate for most logic-level and low-voltage power supply applications. The 1.5pF junction capacitance at 1V reverse bias ensures minimal signal distortion in high-frequency applications such as RF detectors, mixers, and sampling gates. The negligible reverse recovery time (intrinsic to Schottky diodes) enables high-speed switching without the reverse recovery losses associated with P-N junction diodes. The 1uA maximum reverse leakage at 25V and 25C is well-controlled for a Schottky diode, ensuring minimal power loss in blocking state. The tiny SOD-523 package (1.6 x 0.8mm) is ideal for dense PCB layouts in portable and handheld devices where board space is at a premium.","working_principle":"The RB751V40T1G operates as a Schottky barrier diode using a metal-silicon junction. The low barrier height results in a forward voltage of approximately 0.37V at 1mA, compared to 0.6-0.7V for P-N diodes. As a majority-carrier device, there is no minority carrier storage, resulting in essentially zero reverse recovery time. The 1.5pF junction capacitance is determined by the small junction area and the metal-semiconductor barrier, enabling high-frequency operation. The tradeoff for low VF is higher reverse leakage than P-N diodes, but at 1uA maximum it remains well-controlled.","pin_description":"
Pin<\/th>Name<\/th>Function<\/th><\/tr>
1<\/td>Cathode<\/td>Negative terminal (marked with band on package)<\/td><\/tr>
2<\/td>Anode<\/td>Positive terminal<\/td><\/tr><\/table>","application_scenarios":"
  • Signal rectification: 3.3V logic signal rectification with 0.37V drop (vs 0.7V for 1N4148) preserving signal margin<\/li>
  • RF detector: 1.5pF capacitance allows use as AM detector at VHF frequencies with minimal loading<\/li>
  • Clamping: protect MCU GPIO from overshoot by clamping to VCC with low VF Schottky<\/li>
  • OR-ing: diode-OR two 3.3V supply rails with only 0.37V drop per diode<\/li><\/ul>","alternative_models":"
    Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
    onsemi<\/td>RB751S40T1G<\/td>SOD-323<\/td>Larger SOD-323 package version<\/td><\/tr>
    Nexperia<\/td>BAT54S,215<\/td>SOT-23<\/td>30V\/30mA Schottky, common cathode pair<\/td><\/tr>
    onsemi<\/td>MBR0520LT1G<\/td>SOD-123<\/td>20V\/500mA, higher current Schottky<\/td><\/tr>
    Nexperia<\/td>1PS76SB10,215<\/td>SOD-523<\/td>Pin-compatible Schottky, similar spec<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3792","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=3792"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3792\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3792"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}