RHRP8120 hyperfast recovery diode — 1200V 8A soft recovery, TO-220AC
The RHRP8120 is a hyperfast recovery rectifier diode with soft recovery characteristics from ON Semiconductor (now onsemi). It features silicon nitride passivated ion-implanted epitaxial planar construction, delivering recovery times approximately half that of standard ultrafast diodes. The soft recovery characteristic minimises voltage ringing and electrical noise in power switching circuits, reducing switching losses in the associated transistors. It is designed for use as a freewheeling or clamping diode in switch-mode power supplies, motor drives, inverters, and other high-frequency power switching applications.
Key Specifications:
- Part number: RHRP8120
- Type: Hyperfast recovery rectifier diode (single)
- Repetitive peak reverse voltage (Vᴿᴿᴹ): 1200V
- Average forward current (Iᴼ): 8A
- Peak forward surge current (Iᴼᴸ): 80A (8.3ms half sine)
- Forward voltage drop (Vᶠ): 1.7V typ. @ 8A, 25°C
- Reverse recovery time (tᵣᵣ): 35ns typ. @ 1A, 25°C
- Reverse recovery charge (Qᴿᴿ): 90nC typ.
- Maximum junction temperature (Tⱼ): 175°C
- Operating temperature range: −55°C to +175°C
- Package: TO-220AC (through-hole, 2-pin + tab)
- Construction: Silicon nitride passivated, ion-implanted epitaxial planar
Pin Configuration (TO-220AC):
- Pin 1: Anode (A)
- Pin 2: Cathode (K) — also connected to tab
- Tab: Cathode (electrically connected to Pin 2)
Key Advantages over Standard Ultrafast Diodes:
- ~50% shorter recovery time vs. standard ultrafast diodes
- Soft recovery reduces voltage overshoot and ringing
- Lower EMI generation in high-frequency circuits
- Reduced snubber requirements
Applications:
- Freewheeling diodes in IGBT and MOSFET circuits
- Switch-mode power supplies (SMPS) output rectification
- Motor drive inverter circuits
- Solar inverters and UPS systems
- Power factor correction (PFC) circuits
- Induction heating equipment
Note: The TO-220AC tab is electrically connected to the Cathode. Use electrical isolation when mounting to a grounded heatsink. A heatsink is recommended for continuous operation above 2A.