The HM60N20 is HeroMicro a high-performance fast recovery diode, not a MOSFET, engineered for high-efficiency, high-frequency power conversion systems. According to its datasheet (HM60N20.pdf), it features ultrafast recovery time, soft recovery characteristics, low forward voltage drop, and high surge current capability. It is widely used in inverter welders, PFC (Power Factor Correction), SMPS, ultrasonic cleaners, UPS systems, and motor drives.
1. Key Specifications
Repetitive Peak Reverse Voltage (VRRM): 200 V
Average Forward Current (IF(AV)): 60 A (Tc = 110°C)
Single Pulse Surge Current (IFSM): 450 A (Tc = 25°C)
Max Repetitive Forward Current (IFRM): 250 A (square wave, 20 kHz)
Forward Voltage (VF):
Typ. 0.98 V (Max 1.20 V) @ IF = 30 A, Tj = 25°C
Typ. 0.86 V (Max 1.00 V) @ IF = 30 A, Tj = 125°C
Reverse Recovery Time (trr):
Typ. 23 ns (Max 30 ns) @ IF = 0.5 A, IR = 1 A
Typ. 23 ns @ IF = 1 A, VR = 30 V, di/dt = –200 A/μs
Reverse Leakage Current (IR): ≤ 10 μA @ VR = 200 V (25°C); ≤ 100 μA @ 125°C
Junction Temperature (Tj): –55°C to +150°C
Thermal Resistance (RθJC): 1.0 °C/W
Package: Bottom metal is cathode (K), used as heatsink
2. Key Usage Guidelines
(1) Thermal Management
Despite low RθJC (1.0 °C/W), power dissipation can reach ~60 W at full load.
Mount the cathode-side metal base firmly on a heatsink with thermal paste.
Ensure TJ ≤ 150°C for long-term reliability.
(2) High-Frequency Performance
Ultrafast (trr < 30 ns) and soft recovery minimize voltage overshoot and EMI.
Ideal for 20–100 kHz PFC, LLC resonant converters, and inverter welders.
(3) Reverse Recovery & System Losses
Low trr and leakage imply small Qrr, reducing switching losses.
In hard-switching topologies, consider snubber circuits for added protection.
(4) Polarity & Mounting
Bottom metal = Cathode (K); top lead = Anode (A).
Incorrect polarity can cause short circuits—verify before assembly.
For parallel operation, ensure thermal symmetry to balance current sharing.
(5) Typical Applications
PFC boost rectifier
Inverter welder output rectification
UPS and inverter freewheeling/clamping
SMPS secondary rectification or clamp circuits
Plating power supplies and ultrasonic equipment
3. Summary
The HM60N20 delivers exceptional performance in medium-to-high-power, high-frequency applications thanks to its 200V rating, 60A current capability, ultrafast soft recovery, and excellent thermal design. With proper heatsinking, correct polarity, and appropriate circuit integration, it enables efficient, reliable, and compact power conversion systems.
