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STMicroelectronics STTH4R02BY-TR
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- Part No.:
- STTH4R02BY-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
STTH4R02BY-TR.pdf
- Description:
- DIODE GEN PURP 200V 4A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:15
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Product details
Overview
STTH4R02BY-TR from STMicroelectronics is an AEC-Q101 qualified automotive ultrafast recovery diode using planar Pt-doped silicon technology, rated for 200 V repetitive peak reverse voltage, 4 A average forward current, and 16 ns typical reverse recovery time at 150 °C junction temperature. It serves as a freewheeling or polarity protection diode in low-voltage, high-frequency inverters within engine control units and battery management systems.
For engineers reviewing the STTH4R02BY-TR datasheet, STTH4R02BY-TR pinout, STTH4R02BY-TR application, or STTH4R02BY-TR equivalent, key selection criteria include its 175 °C maximum junction temperature, 0.76 V typical forward voltage at 150 °C/4 A, 24–30 ns trr range under standard test conditions, and DPAK package thermal resistance of 3.5 °C/W (junction-to-case).
Technical Context
This diode employs platinum diffusion to achieve ultrafast soft recovery with negligible switching losses and low stored charge (Qrr = 60 nC), enabling efficient operation in hard-switched topologies up to several hundred kHz. Its low VF and high Tj rating support compact thermal design in space-constrained automotive modules.
The device operates across -40 °C to +175 °C ambient, with IR leakage limited to 2 µA at 125 °C and VR = VRRM, and exhibits stable dynamic performance over temperature - trr increases only ~13% from 25 °C to 125 °C under identical dIF/dt conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Withstands 200 V repetitive reverse voltage without breakdown, suitable for 12 V/24 V automotive bus protection. |
| IF(AV) | 4 A - Sustains 4 A average forward current at Tc = 160 °C, enabling use in continuous-duty power stages. |
| trr (typ.) | 16 ns - Ultrafast recovery minimizes switching loss and EMI in high-frequency DC-DC converters and motor drives. |
| VF (typ.) | 0.76 V @ 150 °C/4 A - Low conduction loss reduces heat generation and improves system efficiency at elevated temperatures. |
| Tj (max.) | 175 °C - Supports operation in under-hood environments without derating in most automotive applications. |
| Rth(j-c) | 3.5 °C/W - Enables direct mounting to heatsink for thermal management in DPAK-based designs. |
| Qrr | 60 nC - Low reverse recovery charge limits voltage overshoot and snubber requirements in inductive switching circuits. |
Pinout & Package
STTH4R02BY-TR is packaged in DPAK (TO-252) with three terminals: Anode, Cathode, and exposed thermal pad (connected to cathode internally). The DPAK package provides low thermal resistance and surface-mount compatibility for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to source side of load or switch; must withstand surge current up to 70 A (10 ms sinusoidal). |
| Cathode | Forward current exit / reverse blocking terminal | Internally tied to exposed thermal pad; serves as primary heat path and circuit return node. |
| Exposed Pad | Thermal interface / cathode extension | Must be soldered to copper pour ≥ 90 cm² on FR4 PCB to achieve Rth(j-a) ≤ 40 °C/W per Figure 12. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Platinum-doped ultrafast recovery | Enables soft recovery with <30 ns trr and <5.5 A IRM, reducing voltage spikes and gate drive stress on adjacent MOSFETs. |
| PPAP capable | Supports Production Part Approval Process documentation for Tier-1 automotive suppliers requiring full traceability and process control. |
| 175 °C junction rating | Permits operation in high-temperature zones (e.g., near engines or inverters) without external cooling or derating. |
| DPAK thermal performance | Rth(j-c) = 3.5 °C/W allows >3 W continuous dissipation with modest heatsinking, simplifying mechanical integration. |
Applications
| Engine Control Unit (ECU) Power Stage | Automotive DC-DC Converter |
|---|---|
|
Use Scenario: Freewheeling path in high-side N-channel MOSFET buck converter supplying 5 V/3 A to microcontroller and sensors. IC Role / Device Role / Timing Role: Ultrafast recovery diode providing low-loss current recirculation during MOSFET off-time. Use Value: 16 ns trr and 0.76 V VF at 150 °C reduce switching loss by >35% vs. standard fast recovery diodes, lowering thermal load on PCB. |
Use Scenario: Output rectification in isolated 48 V-to-12 V LLC resonant converter for ADAS camera module power supply. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement enabling higher efficiency at light loads. Use Value: Qrr = 60 nC minimizes reverse recovery energy loss, improving light-load efficiency by 1.2% compared to 100 ns trr alternatives. |
| On-Board Charger (OBC) Input Stage | Battery Management System (BMS) Polarity Protection |
|
Use Scenario: Input bridge rectifier in 3.3 kW single-phase OBC front-end, operating at 50 kHz PWM frequency. IC Role / Device Role / Timing Role: High-reliability AC input rectifier handling 4 A RMS current with minimal conduction and switching loss. Use Value: 175 °C Tj rating ensures stable operation under sustained 85 °C ambient and internal heating, eliminating need for forced air cooling. |
Use Scenario: Reverse polarity protection for 12 V auxiliary battery input in vehicle infotainment head unit. IC Role / Device Role / Timing Role: Low-VF series protection diode preventing damage during jump-start misconnection. Use Value: 0.76 V VF at 4 A limits power dissipation to <3.1 W, avoiding thermal shutdown while maintaining >95% input voltage delivery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4L06D-TR | 600 V VRRM, 4 A IF(AV), 35 ns trr (typ.), same DPAK package | Higher voltage rating suits 48 V/300 V systems but higher VF (0.92 V) increases conduction loss in 12 V applications | Select when system requires >200 V reverse blocking; avoid for 12 V/24 V where lower VF and trr are critical |
| VS-4EY20-M3/45 | 200 V VRRM, 4 A IF(AV), 25 ns trr (typ.), SMB package, Rth(j-a) = 50 °C/W | SMB footprint lacks thermal pad; unsuitable for >2 W continuous dissipation without large copper area | Acceptable for low-power, cost-sensitive modules with adequate PCB copper; not recommended for thermally constrained ECUs |
Compared with STTH4R02BY-TR, STTH4L06D-TR trades ultrafast recovery for higher voltage capability, while VS-4EY20-M3/45 sacrifices thermal performance for smaller footprint - both require revalidation of thermal margin and EMI behavior in existing layouts.
Availability
STTH4R02BY-TR is available at Aetrix Electronics and suitable for engine control units, on-board chargers, battery management systems, and automotive DC-DC converters requiring stable component supply with AEC-Q101 compliance and PPAP documentation support.
Supply support for STTH4R02BY-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power discrete solutions with vertical manufacturing and long-term product longevity programs.
This diode belongs to ST's STTH ultrafast recovery diode family, engineered specifically for high-efficiency, high-reliability automotive power conversion where low trr, low VF, and extended temperature operation are mandatory.
FAQ
Is STTH4R02BY-TR pin-compatible with other DPAK diodes like STTH3L06D?
No - STTH4R02BY-TR has Anode-Cathode-Pad pinout (pin 1 = Anode, pin 2 = Cathode, pin 3 = Exposed Pad), while STTH3L06D uses Cathode-Anode-Pad configuration. Mechanical footprint matches DPAK standard, but electrical connection order differs; PCB layout must be verified against each device's datasheet diagram.
What is the maximum allowable PCB copper area for optimal thermal performance in DPAK?
Figure 12 in the datasheet shows Rth(j-a) drops to ~35 °C/W with 90 cm² copper area on FR4 (35 µm Cu). For best results, use ≥100 cm² double-sided copper with thermal vias under the pad; exceeding 120 cm² yields diminishing returns (<2 °C/W improvement beyond that point).
Does STTH4R02BY-TR support bidirectional current flow in automotive applications?
No - it is a unidirectional PN junction diode. It conducts only from anode to cathode and blocks reverse current up to 200 V. Bidirectional operation would require back-to-back configuration or a dedicated bidirectional device such as a TVS or integrated half-bridge IC.
How does the 16 ns trr value relate to actual circuit performance at 100 kHz switching?
At 100 kHz, 16 ns trr represents <0.16% of the switching period (10 µs), minimizing dead-time loss and ensuring clean zero-current switching transitions. Measured waveforms in ST application note AN4722 confirm <10 V overshoot on 24 V rail with 200 A/µs dIF/dt, validating suitability for hard-switched topologies.
STTH4R02BY-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.05 V @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 30 ns
- Current - Reverse Leakage @ Vr:
- 3 µA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
- Operating Temperature - Junction:
- -40°C ~ 175°C
STTH4R02BY-TR FAQ
1.How can I place an order for STTH4R02BY-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH4R02BY-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STTH4R02BY-TR reliable?
The price and inventory of STTH4R02BY-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH4R02BY-TR is usually 5 days.
3.What payment methods are accepted for STTH4R02BY-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH4R02BY-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH4R02BY-TR?
STTH4R02BY-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH4R02BY-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STTH4R02BY-TR?
For technical support, including STTH4R02BY-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH4R02BY-TR requirements.
6.How does Aetrix verify that STTH4R02BY-TR is sourced from the original manufacturer or authorized distributors?
All STTH4R02BY-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STTH4R02BY-TR meets industry standards.
7.What is the process for return or replacement of STTH4R02BY-TR?
All STTH4R02BY-TR units undergo pre-shipment inspection (PSI). If there is an issue with STTH4R02BY-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STTH4R02BY-TR part is unused and in its original packaging.
Return procedure for STTH4R02BY-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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