High Voltage Diode for Microwave Oven (MWO) Panasonic (Compatible with Magnetron 17470000001006 / E07)

Original certified high-voltage rectifier diode — a critical component of your microwave oven's power supply circuit. Working in tandem with the high-voltage capacitor, it forms a voltage multiplier that delivers the required 4000V (4 kV) to the magnetron.

If your microwave oven hums, lights up, and turns the glass plate but fails to heat food (or heats very weakly), or if it blows the main fuse instantly upon starting — a shorted high-voltage diode is one of the most common causes.

Comprehensive Technical Specifications

This diode is engineered to withstand extreme electrical and thermal loads, providing an enhanced safety margin for stable operation with E07 series magnetrons.

Parameter	Value	Note / Importance
Component Type	High Voltage Diode	Consists of multiple silicon diodes connected in series inside a single molded housing
Max Repetitive Reverse Voltage	12 kV (12,000 V)	Ensures reliable protection against breakdown during voltage surges
Nominal Forward Current	350 mA (0.35 A) / 450 mA	Optimal for 800W – 1000W microwave ovens
Connection Type (Terminals)	Female Spade Terminal (6.3 mm) + Ring Lug (M4 screw)	Standard configuration: ring lug to the chassis (ground), female spade to the capacitor
Magnetron Compatibility	17470000001006, E07, 2M211A, 2M214	Fully covers the power requirements of 800W magnetrons
Operating Temperature	up to +135°C	High thermal stability of internal components

Full Compatibility with Panasonic Microwave Models

This part is a certified replacement and original-spec component designed to restore the performance of the following Panasonic СВЧ/MWO models:

Panasonic NN-ST25HB (NN-ST25HBTW / NN-ST25HBZPE)
Panasonic NN-ST27HM (NN-ST27HMTW / NN-ST27HMZPE)
Panasonic NN-ST34HM (NN-ST34HMTW)
Panasonic NN-ST34HW (NN-ST34HWTW)

Universal Fit for Technicians: thanks to its industry-standard ratings (12kV / 350-450mA), this diode is universally compatible with many other major appliance brands (including LG, Samsung, Whirlpool, Gorenje, Midea, Sharp, Electrolux) that utilize a traditional transformer-based (non-inverter) high-voltage power supply.

Key Advantages of This Diode

Premium Component Reliability: the internal diode string is sealed with a high-density epoxy compound, completely preventing internal arcing, corona discharge, and current leakage.
Heavy-Duty Terminal Crimping: both the female quick-connect terminal and the ground ring lug are securely crimped using advanced factory equipment, preventing localized overheating caused by poor electrical contact.
Perfect Drop-In Fit: the exact dimensions and optimal flexibility of the wire lead allow for a quick, hassle-free replacement without modifying the oven's internal wiring harness.

How to Properly Test a High-Voltage Diode Before Replacement

Important: You cannot test a high-voltage diode using a standard digital multimeter (DMM) in regular "diode test" or "continuity" mode! Because it contains multiple internal diodes in series, its forward voltage drop is too high for a standard multimeter's low-voltage battery. The meter will show an "open circuit" (OL) in both directions, even if the diode is perfectly fine.

Signs of a Faulty Diode:

Shorted Diode (Short Circuit): the microwave emits a loud, deep humming sound when started, food remains cold, or the high-voltage/line fuse blows instantly. A multimeter will beep continuously (resistance will be close to 0 ohms).
Open Diode: the oven runs quietly and spins the tray normally, but does not heat.
9V Battery Test Method (For Techs): a functional diode can be verified by connecting it in series with a 9V-12V DC power source (like a 9V battery) and a small indicator light bulb or by measuring DC voltage drop across it.

Don't delay your repair — restore your appliance's factory performance and safety today! Buy reliable spare parts from trusted suppliers.

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