EXPHV10 Microwave High Voltage Diode

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The high voltage diode is a critical component in the microwave's high-voltage circuit, working alongside the high-voltage capacitor and transformer to convert alternating current (AC) to direct current (DC) — providing the high-voltage DC power required by the magnetron to generate microwave energy and heat food. When the diode fails — due to electrical surges, overheating, or normal wear — the magnetron cannot receive the correct power supply, resulting in a microwave that runs but does not heat. A failed diode may also cause the high-voltage fuse to blow repeatedly. Rated at 12,000V DC (12 kV) with a 500mA current capacity, the EXPHV10 is a universal cross-brand replacement that meets or exceeds OEM specifications across hundreds of microwave models. ⚡ HIGH VOLTAGE SAFETY WARNING — READ BEFORE SERVICING Microwaves contain a high-voltage capacitor that can store a lethal electrical charge of up to 2,100 volts even when the microwave is unplugged. Do NOT touch any internal components without first discharging the capacitor. If you are not experienced with high-voltage appliance repair, do not attempt this repair yourself — contact a qualified appliance technician. Always unplug the microwave before opening the cabinet and discharge the capacitor using a properly insulated discharge tool before handling any internal parts. Quick Answer The XPARTCO EXPHV10 Microwave High Voltage Diode fixes microwaves that run but produce no heat, have a repeatedly blown fuse, or have a humming sound with no heating. It converts AC to DC power for the magnetron and is rated 12,000V DC / 500mA. Universal fit — compatible with most GE, Whirlpool, Maytag, Samsung, LG, Frigidaire, Panasonic, Sharp, KitchenAid, and Kenmore microwaves. Common Problems This Part Fixes Microwave runs (turntable spins, light works) but does not heat food High-voltage fuse blows repeatedly after replacement Loud humming or buzzing sound with no heating Microwave takes much longer than normal to heat food Microwave heats unevenly or inconsistently Replaces Part Numbers This diode directly replaces the following OEM and cross-reference part numbers: HV10, EXPHV10, 2CL70, 2CL77, W11256462, W10886077, AWP43735, PD00047836, AP6784287, PS12584264, WB27X1160, AGE22195, PD00026293, AP2026385, PS239843, DE91-70063D, DE91-70063A, ASM94577, PD00033057, AP4236698, PS4235633, 5304417430, AP2151558, PS472334, 6021W3B001U, AP4439834, PS3528798, 6851W1A002E, ALG51731, PD00006373, AP5203812, PS3529603, 5304456178, AP3960683, PS1532581, 3518400800, AP7110292, 5304509479, 5304472472, AFR17769, PD00040522, AP4433625, PS12071314, WPR9800486, AWP128355, PD00004942, AP6014695, PS11747959, 11QBP0237, AP5633255, PS4085135, WB27X10744, AP3792899, PS953886, WB27X35382, WB27X10930, WB18X10449, WB27X10892, WB27X10965, WB27X11035, AP6992536, PS16219547, WB27X10562, AGE1037090, AP3187536, PS239704, WP13091701, AWP634588, PD00035043, AP6005641 PS11738693, WB27X10687, AGE1019656, PD00032466, AP3207509, PS953843, WB27X10107, AP2026017, PS239224, WB27X10037, AGE22509 PD00031660, AP2025948, PS239148, WPDE91-70063D, AWP547793, PD00034036, AP6014620, PS11747873, 6021W3B001V, 6021W3B001R, AP5632506 EAP3528799, ALG51931, PD00008859, AP4438526, PS3528799, WB27X21012, AGE360033, PD00037340, AP5791119, PS8754690, 00625682, 10001605, ABS11495, PD00047510, AP5804800, PS8770335, CL04-12. If your part number is not listed above, contact our support team before ordering and we will verify compatibility. Compatibility This universal high voltage diode is compatible with most microwave ovens from the following brands: GE and Hotpoint microwaves Whirlpool microwaves Maytag microwaves KitchenAid microwaves Samsung microwaves LG microwaves Frigidaire and Electrolux microwaves Panasonic microwaves Sharp microwaves Kenmore / Sears microwaves Always verify your appliance model number before ordering. Contact our support team if you're unsure. Key Features Converts AC to DC power in the microwave's high-voltage circuit — enabling the magnetron to generate microwave energy and heat food Rated 12,000V DC (12 kV) / 500mA — meets or exceeds OEM electrical specifications Universal fit — compatible with most major microwave brands across hundreds of models Aftermarket replacement built to OEM-equivalent quality standards Pre-terminated leads — direct drop-in replacement, no modification required Compact insulated design for safe and easy installation Budget-friendly fix for one of the most common microwave no-heat failures Product Specifications Part Number EXPHV10 Part Type High Voltage Diode (Rectifier) Condition Aftermarket Replacement Application Microwave Oven High Voltage Circuit Voltage Rating 12,000V DC (12 kV) Current Rating 500 mA Material Insulated Epoxy Body Terminals Pre-terminated leads Fit Type Universal — fits most major microwave brands Compatible Brands GE, Whirlpool, Maytag, KitchenAid, Samsung, LG, Frigidaire, Panasonic, Sharp, Kenmore Installation Notes ⚡ DANGER — HIGH VOLTAGE — DISCHARGE CAPACITOR BEFORE SERVICING Microwaves store a lethal charge in the high-voltage capacitor even when unplugged. You must discharge the capacitor before touching any internal parts. Use a properly insulated discharge tool or resistor — never a screwdriver or bare wire. Once the capacitor is safely discharged: unplug the microwave and remove the outer cover. Locate the high voltage diode — it is connected between the high-voltage capacitor and the chassis ground. Disconnect both leads, note the orientation/polarity, remove the old diode, and install the new EXPHV10 in the same position and orientation. Reconnect leads, reassemble the cover, and test heating operation. Time required: approximately 20–25 minutes. If you are unsure about any step, contact a qualified appliance technician. Frequently Asked Questions Will the EXPHV10 fit my microwave? The EXPHV10 is a universal replacement diode compatible with most GE, Whirlpool, Maytag, KitchenAid, Samsung, LG, Frigidaire, Panasonic, Sharp, and Kenmore microwaves. Use the model search above to verify, or contact our support team before ordering. What does the high voltage diode do? The high voltage diode works with the capacitor and transformer to convert AC power to high-voltage DC power — typically around 4,000 to 5,000 volts. This DC voltage powers the magnetron, which generates the microwave energy that heats food. A failed diode prevents the magnetron from receiving proper power, resulting in a microwave that runs but does not heat. How do I test if my microwave diode is bad? After safely discharging the capacitor, use a multimeter set to the diode test mode. A good diode will show continuity in one direction and no continuity in the other (one-way electrical flow). A bad diode will show either no continuity in both directions (open) or continuity in both directions (shorted). A shorted diode will also cause the fuse to blow repeatedly. My microwave fuse keeps blowing — is the diode the problem? A shorted high voltage diode is one of the most common causes of a repeatedly blown microwave fuse. When the diode shorts, it draws excess current which blows the fuse. If you replace only the fuse and it blows again immediately, test the diode and capacitor as well before replacing the fuse again. Is this an OEM or aftermarket part? This is an aftermarket universal replacement part built to OEM-equivalent electrical specifications. It is not a genuine OEM part from any specific brand, but is rated at 12,000V DC / 500mA — meeting or exceeding the requirements of most microwave high-voltage circuits. Shop With Confidence A U.S.-based appliance parts retailer specializing in genuine OEM and high-quality replacement parts. We stock components for all major appliance brands and offer fast shipping from our U.S. warehouse. Our team is available to help verify compatibility before you purchase. ✓ Fast US Shipping ✓ Quality Aftermarket Parts ✓ Compatibility Support ✓ Secure Checkout (function() { function initModelSearch() { var searchInput = document.getElementById('modelSearch'); var noResults = document.getElementById('noResults'); var matchFound = document.getElementById('matchFound'); var tableBody = document.getElementById('modelTableBody'); if (!searchInput || !tableBody) return; searchInput.addEventListener('focus', function() { this.style.borderColor = '#1e40af'; this.style.boxShadow = '0 0 0 4px rgba(30,64,175,0.2)'; }); searchInput.addEventListener('blur', function() { this.style.borderColor = '#93c5fd'; this.style.boxShadow = '0 1px 4px rgba(30,64,175,0.08)'; }); searchInput.addEventListener('input', function() { var query = this.value.trim().toUpperCase(); var rows = tableBody.querySelectorAll('tr'); var matchCount = 0; rows.forEach(function(row) { var cell = row.cells[0]; if (cell) { var text = cell.textContent.trim().toUpperCase(); var visible = query === '' || text.indexOf(query) !== -1; row.style.display = visible ? 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Compatible with GE, Whirlpool, Samsung, LG, Frigidaire, Panasonic, Sharp, Bosch, and Kenmore.", "sku": "EXPHV10", "mpn": "EXPHV10", "brand": { "@type": "Brand", "name": "XPARTCO" }, "offers": { "@type": "Offer", "url": "https://parts-o-matic.com", "priceCurrency": "USD", "availability": "https://schema.org/InStock", "itemCondition": "https://schema.org/NewCondition", "seller": { "@type": "Organization", "name": "Parts-O-Matic" } } } { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Will the EXPHV10 fit my microwave?", "acceptedAnswer": { "@type": "Answer", "text": "The EXPHV10 is a universal replacement diode compatible with most GE, Whirlpool, Maytag, KitchenAid, Samsung, LG, Frigidaire, Panasonic, Sharp, and Kenmore microwaves. Use the model search or contact Parts-O-Matic support to verify compatibility." } }, { "@type": "Question", "name": "What does the high voltage diode do?", "acceptedAnswer": { "@type": "Answer", "text": "The high voltage diode converts AC power to high-voltage DC power to run the magnetron, which generates microwave energy and heats food. A failed diode causes the microwave to run but not heat." } }, { "@type": "Question", "name": "How do I test if my microwave diode is bad?", "acceptedAnswer": { "@type": "Answer", "text": "After safely discharging the capacitor, use a multimeter in diode test mode. A good diode shows continuity in one direction only. A bad diode shows no continuity in either direction (open) or continuity in both directions (shorted). A shorted diode will also cause the fuse to blow repeatedly." } }, { "@type": "Question", "name": "My microwave fuse keeps blowing — is the diode the problem?", "acceptedAnswer": { "@type": "Answer", "text": "A shorted high voltage diode is a common cause of a repeatedly blown microwave fuse. Always test the diode and capacitor before replacing the fuse again, or the new fuse will blow immediately." } }, { "@type": "Question", "name": "Is the EXPHV10 an OEM or aftermarket part?", "acceptedAnswer": { "@type": "Answer", "text": "This is a universal aftermarket replacement rated at 12,000V DC / 500mA, meeting or exceeding OEM electrical specifications across most microwave brands." } } ] } Show more