STTH4R02B STMicroelectronics Integrated Circuit (Other) In Stock
The STTH4R02B is an ultra-fast recovery silicon rectifier diode rated 4 A and 200 V in a 3-pin D-PAK surface-mount package. It features a 30 ns reverse recovery time, 0.83 V maximum forward voltage, and is optimized as a free-wheeling diode in switching power supplies. Available from stock worldwide with competitive pricing.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- STTH4R02B Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 175.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 30 ns ultra-fast reverse recovery time minimizes switching losses in SMPS operating at frequencies above 100 kHz
- 4 A continuous forward current rating with 0.83 V maximum forward voltage reduces conduction losses in rectification and free-wheeling circuits up to 200 V
- D-PAK (R-PSSO-G3) surface-mount package with cathode case connection enables direct heatsinking to PCB copper pours for efficient thermal management
Applications
The STTH4R02B serves as a free-wheeling or catch diode in buck, boost, and flyback converters where fast recovery below 50 ns is essential to prevent shoot-through at switching frequencies from 50 kHz to 500 kHz. Its 200 V blocking voltage and 4 A current rating make it suitable for motor-drive output stages and PFC boost converters in white goods and industrial power supplies. The D-PAK package allows direct thermal coupling to the PCB, keeping junction temperatures within safe limits without a separate heatsink clip.
Specifications
| YTEOL | 0 |
| Additional Feature | FREE WHEELING DIODE |
| Application | ULTRA FAST RECOVERY |
| Case Connection | CATHODE |
| Configuration | SINGLE |
| Diode Element Material | SILICON |
| Diode Type | RECTIFIER DIODE |
| Forward Voltage-Max (VF) | 0.83V |
| JESD-30 Code | R-PSSO-G3 |
| JESD-609 Code | e3 |
| Non-rep Pk Forward Current-Max | 70A |
| Number of Elements | 1 |
| Number of Phases | 1 |
| Output Current-Max | 4A |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Rep Pk Reverse Voltage-Max | 200V |
| Reverse Recovery Time-Max | 0.03 µs |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.80 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the STTH4R02B 30 ns recovery time reduce losses in a 200 kHz boost converter compared to a standard rectifier?
In a 200 kHz boost converter, a standard 200 ns recovery rectifier conducts reverse current for 4% of each switching cycle, dissipating significant power at 200 V transitions. The STTH4R02B with a 30 ns recovery time reduces that window to 0.6% of the cycle, cutting reverse-recovery switching losses by roughly 85% and lowering device and MOSFET temperature rise, which extends component lifetime and improves overall converter efficiency above 95%.
What makes STTH4R02B suitable as a free-wheeling diode in a brushless motor drive operating at 48 V?
In a 48 V brushless motor drive, the free-wheeling diode must clamp inductive fly-back voltages from motor windings and recover quickly before the next PWM cycle. The STTH4R02B handles this with its 200 V reverse blocking rating providing ample margin above the 48 V bus including transient spikes, while the 30 ns recovery time supports PWM frequencies up to 20 kHz commonly used in servo motor controllers. Its 4 A continuous rating also matches the per-phase current of small to mid-range BLDC motors.
How does the D-PAK package thermal resistance affect power dissipation limits for STTH4R02B in a 70°C ambient environment?
The D-PAK package offers a junction-to-case thermal resistance typically around 5°C/W for this device category, and when soldered to a 1 cm² copper pad on a standard 1 oz PCB, the effective junction-to-ambient resistance is approximately 40°C/W to 60°C/W. At a 70°C ambient with a 150°C maximum junction temperature, the device can dissipate up to 1.3 W continuously, corresponding to over 4 A at the 0.83 V forward voltage, staying within the rated operating envelope.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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