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onsemi RHRG75120
- Part No.:
- RHRG75120
- Manufacturer:
- onsemi
- Category:
- Single Diodes
- Package:
- TO-247-2
- Datasheet:
-
RHRG75120.pdf
- Description:
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Product Details
RHRG75120 - onsemi 1200V 75A Hyperfast Rectifier Diode (TO-247-2L)
The RHRG75120 from onsemi (formerly Fairchild Semiconductor) is a 1200V, 75A hyperfast soft-recovery rectifier diode with a 100ns reverse recovery time, avalanche energy rating, and low forward voltage of 3.2V. Built on a silicon nitride passivated ion-implanted epitaxial planar construction and housed in a rugged TO-247-2L package, it is designed for free-wheeling and clamping in switching power supplies, PFC stages and power switching circuits.
Product Introduction
The RHRG75120 is a 1200V / 75A hyperfast rectifier optimized for soft recovery and short reverse-recovery time. The diode reaches a typical trr of 100ns at the full 75A forward current (di/dt = 100A/µs), which minimizes switching loss and reverse-recovery ringing in hard-switched topologies, while the soft-recovery characteristic suppresses electrical noise and reduces stress on the companion switching transistor.
With a 1200V repetitive reverse voltage and 75A average rectified forward current (TC = 42°C, 20kHz square wave), the RHRG75120 is intended to be used as a free-wheeling clamp diode and output rectifier in higher-voltage power supplies, boost PFC pre-regulators, inverters and motor-drive snubbers. It is avalanche energy rated (EAVL = 50mJ), giving extra ruggedness against transient over-voltage events.
The device is supplied in the JEDEC TO-247-2L (TO-247AC two-lead) through-hole package with the cathode connected to the mounting tab for efficient heat transfer to a heatsink, and it is RoHS compliant / lead-free.
Expert Technical Insight
Why choose the RHRG75120 for 1200V hard-switched rectification?
- Hyperfast 100ns soft recovery cuts switching loss: the short, soft reverse recovery reduces turn-off losses in the diode and the turn-on losses in the opposing transistor, while lowering EMI from recovery ringing - critical in high-frequency boost PFC and inverter legs.
- 1200V / 75A with avalanche rating adds margin: the 1200V blocking voltage suits 800V DC-bus and three-phase rectified rails, and the 50mJ avalanche energy rating lets the diode survive unclamped inductive transients without an external snubber in many designs.
- TO-247-2L tab-cathode eases thermal design: the cathode-on-tab construction and 0.8°C/W junction-to-case thermal resistance let the 190W-rated device run cool when bolted to a heatsink, supporting sustained 75A operation.
Key Benefits
1200V repetitive peak, working and DC blocking voltage suits 800V-class DC buses and three-phase rectified rails with comfortable margin.
75A average rectified forward current with 150A repetitive and 500A non-repetitive surge handles demanding free-wheeling and rectification duty.
Typical 100ns trr at 75A with soft recovery minimizes switching loss, ringing and EMI in hard-switched converters.
50mJ avalanche energy rating provides ruggedness against unclamped inductive transients and improves system reliability.
Specifications
| Parameter | Value | Condition / Notes |
|---|---|---|
| Device Type | Hyperfast Soft-Recovery Rectifier Diode | onsemi / Fairchild |
| Repetitive Peak Reverse Voltage (VRRM) | 1200 V | = VRWM = VR (DC blocking) |
| Average Rectified Forward Current (IF(AV)) | 75 A | TC = 42°C, 20kHz square wave |
| Repetitive Peak Surge Current (IFRM) | 150 A | Square wave, 20kHz |
| Non-Repetitive Surge Current (IFSM) | 500 A | Halfwave, single phase, 60Hz |
| Forward Voltage (VF) | 3.2 V (max) | IF = 75A, 25°C (2.6V at 150°C) |
| Reverse Leakage (IR) | 250 µA (max) | VR = 1200V, 25°C |
| Reverse Recovery Time (trr) | 100 ns (max) | IF = 75A, di/dt = 100A/µs |
| Power Dissipation (PD) | 190 W | TC = 25°C |
| Avalanche Energy (EAVL) | 50 mJ | |
| Thermal Resistance (RθJC) | 0.8 °C/W | Junction to case |
| Operating / Storage Temp (TJ, TSTG) | -65 °C ~ +175 °C | |
| Package | TO-247-2L (TO-247AC) | Cathode on tab, lead-free / RoHS |
Note: Refer to the official onsemi RHRG75120 datasheet for full electrical parameters and curves. Subject to change without notice; verify all parameters before final design.
Package Information
The RHRG75120 is supplied in the JEDEC TO-247-2L (TO-247AC, two-lead) through-hole power package. The cathode is connected to the metal mounting tab on the back of the package, giving a low junction-to-case thermal resistance of 0.8°C/W for efficient heat transfer to a heatsink.
With a 190W power dissipation rating and isolated-mounting options via the tab hole, the TO-247-2L package supports the sustained 75A forward current and the high surge ratings of this device in demanding power circuits. The package is lead-free and RoHS compliant.
Terminal Configuration & Polarity
The RHRG75120 is a two-terminal rectifier diode (Anode and Cathode). Observe correct polarity when mounting:
- Anode (A): Positive terminal in forward conduction; one of the two package leads.
- Cathode (K): Negative terminal in forward conduction. On the TO-247-2L the cathode is internally connected to the metal mounting tab (back of package), so the heatsink-side metal is at cathode potential - isolate the heatsink if it must stay at a different potential.
Current flows from anode to cathode when forward biased; the diode blocks up to 1200V when reverse biased (cathode positive with respect to anode).
Alternative Parts
The following 1200V-class hyperfast / ultrafast rectifiers are listed for reference. Before selecting an alternative, verify reverse voltage, forward current, reverse-recovery time, package and thermal rating against your design.
| Part Number | Brand | Type | Package | Key Feature |
|---|---|---|---|---|
| RHRG30120 | onsemi | Hyperfast Rectifier / 1200V / 30A | TO-247-2L | Same family, lower 30A current rating |
| ISL9R3060G2 | onsemi | Hyperfast Rectifier / 600V / 30A | TO-220 | 600V class, lower voltage hyperfast |
| STTH75L12 | STMicroelectronics | Ultrafast Rectifier / 1200V / 75A | TO-247 | Comparable 1200V/75A ultrafast turbo diode |
| FFH75H120 | onsemi | Hyperfast Rectifier / 1200V / 75A | TO-247 | Functionally similar 1200V/75A hyperfast |
Manufacturer Information
onsemi (ON Semiconductor, NASDAQ: ON), headquartered in Scottsdale, Arizona, USA, is a leading supplier of power and sensing semiconductors. The RHRG75120 originated from Fairchild Semiconductor, which became part of onsemi; the device remains part of onsemi's hyperfast rectifier portfolio for switching power applications.
onsemi maintains technical support centers and distribution worldwide, providing datasheets, SPICE models and application notes for its rectifier and power-discrete families to support fast design-in and volume production.
Application Areas
Frequently Asked Questions
What is RHRG75120 used for?
RHRG75120 is a 1200V 75A hyperfast rectifier diode used as a free-wheeling, clamp or boost diode in switching power supplies, PFC stages, inverters and power switching circuits.
Which terminal is the cathode on the TO-247-2L?
The cathode is internally connected to the metal mounting tab on the back of the TO-247-2L package, so the heatsink-side metal is at cathode potential.
Can RHRG75120 be replaced by another part?
Only after verifying reverse voltage, forward current, reverse-recovery time, package and thermal rating against the original. See the alternatives table for 1200V-class candidates.
Disclaimer
Information Accuracy: Technical specifications on this page are based on the onsemi official datasheet. We strive for accuracy and completeness, but specifications are subject to change without notice. Verify all parameters before final design.
Product Authenticity Guarantee: We guarantee all products sold are genuine factory originals with complete material traceability.
Technical Support: Free technical consultation services are available both before and after purchase.
Application Note: This product page is for reference only. Suitability for specific applications should be verified by design engineers based on actual system requirements.
RHRG75120 Specifications
- Specifications
- Attributes
- Property Value
- Manufacturer
- onsemi
- Series:
- -
- Package/Case:
- TO-247-2
- Packaging:
- Tube
- Part Status:
- Obsolete
- Technology:
- Avalanche
- Voltage - DC Reverse (Vr) (Max):
- 1200 V
- Voltage - Forward (Vf) (Max) @ If:
- 3.2 V @ 75 A
- Speed:
- Reverse Recovery Time (trr):
- 100 ns
- Current - Reverse Leakage @ Vr:
- 250 µA @ 1200 V
- Capacitance @ Vr, F:
- -
- Current - Average Rectified (Io):
- 75A
- Grade:
- -
- Qualification:
- -
- Mounting Style:
- Through Hole
- Supplier Device Package:
- TO-247-2
- Operating Temperature - Junction:
- -65°C ~ 175°C
- Category:
- Single Diodes
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