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
What are the key features of STTH4R02B?
- 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
What is STTH4R02B used for?
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.
What are the specifications of STTH4R02B?
| 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 |
Where can I find the STTH4R02B datasheet?
STTH4R02B Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STTH4R02B?
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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Why Buy from FindMyChip
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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