{"product_id":"smbj15ca-tvs-diode-15v-600w","title":"SMBJ15CA TVS Diode 15V 600W (BM) – Control Board Protection for Antminer \/ Whatsminer \/ Avalon","description":"\u003ch2\u003eSMBJ15CA Bidirectional TVS Diode | 15V \/ 600W Surge Protection for Antminer, Whatsminer \u0026amp; Avalon Control Boards\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSMBJ15CA\u003c\/strong\u003e (silk marking \u003cstrong\u003eBM\u003c\/strong\u003e) is a \u003cstrong\u003ebidirectional TVS (Transient Voltage Suppression) diode\u003c\/strong\u003e used across \u003cstrong\u003eASIC miner control boards\u003c\/strong\u003e from Antminer, Whatsminer, Innosilicon, and Avalon to clamp transient voltage spikes before they reach sensitive logic. Bidirectional construction protects against transients of either polarity, which matters on signal lines that swing in both directions.\u003c\/p\u003e\n\u003cp\u003eHeadline numbers for control-board protection: \u003cstrong\u003e15V working voltage\u003c\/strong\u003e, \u003cstrong\u003e600W peak pulse power (10\/1000µs)\u003c\/strong\u003e, \u003cstrong\u003eup to 4kW surge capability (8\/20µs)\u003c\/strong\u003e, \u003cstrong\u003e0.2µA leakage at 25°C\u003c\/strong\u003e (negligible standby draw), and \u003cstrong\u003eup to 150°C junction temperature tolerance\u003c\/strong\u003e. The DO-214AA (SMB) package is the standard mid-power TVS outline — wide compatibility across boards that route TVS protection on critical signal lines.\u003c\/p\u003e\n\u003ch3\u003eWhen to Replace the SMBJ15CA\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl board logic damage after a lightning event\u003c\/strong\u003e — TVS absorbed the strike, sacrificed itself, replace before the next strike kills downstream logic.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible damage on the DO-214AA package\u003c\/strong\u003e — cracking or burning after a surge event.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal line stuck at rail\u003c\/strong\u003e — TVS shorted, clamping the line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClimbing leakage current\u003c\/strong\u003e measured on the protected line — TVS degraded after repeated transient events.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl board boots intermittently after power events\u003c\/strong\u003e — TVS no longer absorbing transients cleanly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSMBJ15CA TVS Diode Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eSMBJ15CA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilk Marking\u003c\/td\u003e\n\u003ctd\u003eBM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eTVS diode (bidirectional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking Voltage\u003c\/td\u003e\n\u003ctd\u003e15V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Pulse Power\u003c\/td\u003e\n\u003ctd\u003e600W (10\/1000 µs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge Capability\u003c\/td\u003e\n\u003ctd\u003eUp to 4 kW (8\/20 µs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLeakage Current\u003c\/td\u003e\n\u003ctd\u003e0.2 µA at 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJunction Temperature (max)\u003c\/td\u003e\n\u003ctd\u003e150°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eSMB (DO-214AA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eSurface mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Boards\u003c\/td\u003e\n\u003ctd\u003eAntminer \/ Whatsminer \/ Innosilicon \/ Avalon control boards, SMPS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eBrand New\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eFAQ — SMBJ15CA TVS Diode\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Bidirectional vs unidirectional TVS — which one is the SMBJ15CA?\u003c\/strong\u003e\u003cbr\u003eA: The \u003cstrong\u003eCA\u003c\/strong\u003e suffix on the part number indicates \u003cstrong\u003ebidirectional\u003c\/strong\u003e construction (clamps positive and negative transients). The plain \u003cstrong\u003eSMBJ15A\u003c\/strong\u003e (without C) is unidirectional. Match the original part exactly when replacing — substituting unidirectional on a bidirectional pad will leave one polarity unprotected.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm the TVS is the dead part?\u003c\/strong\u003e\u003cbr\u003eA: Power off. DMM diode-test mode across the TVS. Healthy bidirectional TVS reads ~0.7V in both directions (positive and negative). Shorted reads 0Ω both directions. Open reads OL both directions. Any short on the line being protected = replace TVS and inspect downstream logic for damage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will a higher voltage TVS work as a substitute?\u003c\/strong\u003e\u003cbr\u003eA: Risky. A higher-voltage TVS (e.g. SMBJ20CA) will clamp at a higher voltage and may let through transients that the original 15V part would have absorbed. Substitute only with the same working voltage rating.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Bulk pricing for control board repair?\u003c\/strong\u003e\u003cbr\u003eA: Yes — email contact@lys-sz.com for reel-quantity SMBJ15CA pricing.\u003c\/p\u003e\n\u003ch3\u003eRelated products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/smbj190a-pa-tvs-diode-antminer-l7-d7-hashboard-bitmain-repair\"\u003eSMBJ190A PA TVS Diode 190V (Antminer L7 \/ D7 \/ S21 \/ T21)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/smbj22a-lx-diodes-antminer-s19hydro-hhb28601-hashboard-repair\"\u003eSMBJ22A LX TVS Diode 22V (Antminer S19 Hydro)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pesduc2fd5vb-b1-diode-esd-protection-crypto-miner\"\u003ePESDUC2FD5VB ESD Protection Diode (DFN1006-2L)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/s14k300-metal-oxide-varistor-bitmain-power-supply-unit-apw9-repair\"\u003eS14K300 Metal-Oxide Varistor (Bitmain APW9)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eControl board repair benches stocking SMBJ15CA TVS diodes by the reel? Email \u003ca href=\"mailto:contact@lys-sz.com\"\u003econtact@lys-sz.com\u003c\/a\u003e for bulk pricing. Worldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":45392777445555,"sku":null,"price":0.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/SMBJ15CA-TVS-Diode-15V-600W-Control-Board-Protection.webp?v=1774917670","url":"https:\/\/lys-sz.com\/products\/smbj15ca-tvs-diode-15v-600w","provider":"LYS Shenzhen","version":"1.0","type":"link"}