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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

STMicroelectronics STTH4R02UY

Name: STTH4R02UY
Brand: STMicroelectronics
SKU: STTH4R02UY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH4R02UY

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: STTH4R02UY.pdf

Description:: DIODE GEN PURP 200V 4A SMB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STTH4R02UY from STMicroelectronics is an automotive-grade ultrafast recovery silicon diode optimized for low-voltage, high-frequency switching applications. It features 200 V repetitive peak reverse voltage (V_RRM), 4 A average forward current (I_F(AV)), 16 ns typical reverse recovery time (t_rr), and operates up to 175 °C junction temperature - enabling use in freewheeling, polarity protection, and base-drive circuits in automotive inverters.

For engineers reviewing the STTH4R02UY datasheet, STTH4R02UY pinout, STTH4R02UY application, or STTH4R02UY equivalent, key selection criteria include its ultrafast t_rr performance at 125 °C, low 0.76 V typical forward voltage at 150 °C, AEC-Q101 qualification, PPAP capability, and SMB package thermal resistance profile.

Technical Context

This diode employs ST's planar platinum-doped technology to achieve negligible switching losses and very low conduction losses. Its dynamic behavior is characterized by a 16 ns t_rr at 125 °C with dI_F/dt = −200 A/µs and VR = 160 V, and a Q_rr of 60 nC under the same conditions.

The device supports high-reliability automotive operation via AEC-Q101 qualification and is thermally rated for T_j(max) = 175 °C. Its SMB package delivers R_th(j-l) = 20 °C/W (junction-to-lead), enabling efficient heat dissipation in compact PCB layouts without a heatsink.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Withstands repetitive reverse voltages up to 200 V in automotive power rails and DC-link clamping.
I_F(AV)	4 A at T_lead = 95 °C - Sustains continuous forward current in SMB-packaged freewheeling paths.
t_rr (typ.)	16 ns at T_j = 125 °C, dI_F/dt = −200 A/µs - Enables high-frequency (>100 kHz) switching with minimal switching loss.
V_F (typ.)	0.76 V at I_F = 4 A, T_j = 150 °C - Reduces conduction loss and self-heating in high-duty-cycle automotive loads.
Q_rr	60 nC at T_j = 125 °C - Limits reverse recovery charge-induced EMI and voltage overshoot during turn-off.
T_j(max)	175 °C - Supports operation in under-hood environments without derating in most automotive mounting configurations.
R_th(j-l)	20 °C/W - Defines thermal path efficiency from junction to PCB copper leads in SMB footprint.

Pinout & Package

STTH4R02UY is packaged in SMB (DO-214AA), a surface-mount plastic case with two terminals: cathode (K) and anode (A). The SMB outline measures 3.30–3.95 mm × 5.10–5.60 mm × 1.90–2.45 mm (L × W × H), with gull-wing leads for reflow-compatible assembly.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to lower-potential side (e.g., ground or source) in freewheeling or polarity protection topologies.
Cathode (K)	Forward current exit / reverse blocking terminal	Connected to higher-potential node (e.g., switched rail or battery +); blocks reverse current up to 200 V.

Key Features

Feature	Design Value
Ultrafast recovery	16 ns t_rr at 125 °C enables >100 kHz switching with minimal turn-off loss and EMI.
AEC-Q101 qualified	Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock per AEC standard.
PPAP capable	Supports Production Part Approval Process documentation and traceability for Tier-1 automotive supply chain compliance.
Low V_F at high T_j	0.76 V typ. at 150 °C reduces thermal runaway risk and improves system efficiency in sustained-load conditions.
Platinum-doped planar structure	Ensures consistent t_rr and Q_rr across temperature and lifetime, critical for long-term inverter reliability.

Applications

Automotive DC-DC Converters

On-Board Charger (OBC) Freewheeling

Use Scenario: High-efficiency 12 V–48 V bidirectional DC-DC conversion in 48 V mild-hybrid systems.

IC Role / Device Role / Timing Role: Ultrafast freewheeling diode in synchronous buck/boost stages, operating at 150–300 kHz.

Use Value: 16 ns t_rr minimizes reverse recovery loss and allows higher switching frequency without efficiency penalty.

Use Scenario: Secondary-side rectification and freewheeling in AC/DC and DC/DC stages of EV on-board chargers.

IC Role / Device Role / Timing Role: Low-loss output rectifier handling 4–6 A continuous current at 100–200 kHz switching.

Use Value: 0.76 V V_F at 150 °C lowers conduction loss and eases thermal management on compact OBC PCBs.

Automotive LED Headlamp Drivers

Polarity Protection in Body Control Modules

Use Scenario: Constant-current LED driver for adaptive front-lighting systems (AFS) with PWM dimming.

IC Role / Device Role / Timing Role: Fast-switching flyback diode in inductive LED current regulation loops.

Use Value: Negligible switching loss preserves driver efficiency and prevents thermal drift in sealed headlamp housings.

Use Scenario: Reverse-voltage protection for 12 V power inputs in door modules, seat controllers, and HVAC actuators.

IC Role / Device Role / Timing Role: Low-V_F, high-T_j protection diode placed in series with input rail.

Use Value: 175 °C rating ensures reliable operation near hot ECUs; 200 V V_RRM withstands load-dump transients.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH4R02DY	DPAK package (R_th(j-c) = 3.5 °C/W); higher I_F(AV) = 4 A at T_c = 160 °C	Better suited for heatsink-mounted, higher-power (>10 W) freewheeling where PCB copper area is limited	Select when thermal interface to heatsink is available and average power exceeds 3 W.
VS-4EYH02-M3	Vishay SMB diode; t_rr = 25 ns (typ.) at 25 °C, V_F = 0.85 V (typ.) at 4 A, 25 °C; not AEC-Q101 qualified	Lacks automotive qualification and high-temperature t_rr data; suitable only for industrial/non-safety-critical use	Acceptable for cost-sensitive non-automotive designs where AEC-Q101 is not required.

Compared with STTH4R02DY and VS-4EYH02-M3, STTH4R02UY uniquely combines AEC-Q101 qualification, 16 ns t_rr at 125 °C, and SMB form factor - making it the only choice for space-constrained, high-reliability automotive freewheeling where full qualification and thermal robustness are mandatory.

Availability

STTH4R02UY is available at Aetrix Electronics and suitable for automotive DC-DC converters, on-board charger freewheeling, and LED headlamp drivers requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for STTH4R02UY 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STTH ultrafast diode product line targets high-efficiency, high-reliability power conversion in automotive and industrial systems - specifically engineered for low-loss, high-temperature, fast-recovery operation in demanding switching topologies.

FAQ

What is the maximum junction temperature rating for STTH4R02UY?

The absolute maximum junction temperature (T_j(max)) is 175 °C, validated per AEC-Q101 stress testing. This rating applies across the full operating range and enables direct placement near heat sources in automotive ECUs without external heatsinking when used within SMB thermal limits.

Is STTH4R02UY pin-compatible with other STTH diodes in SMB package?

Yes - all STTHxRxxUY variants (e.g., STTH3R02UY, STTH5R02UY) share identical SMB (DO-214AA) mechanical dimensions and anode/cathode terminal layout. However, electrical parameters such as I_F(AV), V_F, and t_rr differ and must be verified per design requirements.

Does STTH4R02UY require a heatsink in typical automotive applications?

No - the SMB package's R_th(j-l) = 20 °C/W and low V_F allow operation at 4 A average current with adequate PCB copper (≥1 cm² per lead) without a heatsink. Heatsinking is only needed if ambient temperature exceeds 105 °C or power dissipation exceeds 2.5 W.

How does STTH4R02UY perform under load-dump conditions?

With 200 V V_RRM and AEC-Q101 qualification, STTH4R02UY withstands ISO 7637-2 Load Dump Pulse 5a (up to 60 V for 400 ms) when used in series polarity protection. Its 175 °C T_j(max) ensures safe operation during transient overvoltage events without thermal runaway.

STTH4R02UY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: Q

Package/Case:: DO-214AA, SMB

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:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMB

Operating Temperature - Junction:: -40°C ~ 175°C

STTH4R02UY FAQ

1.How can I place an order for STTH4R02UY through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH4R02UY 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 STTH4R02UY reliable?

The price and inventory of STTH4R02UY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH4R02UY is usually 5 days.

3.What payment methods are accepted for STTH4R02UY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH4R02UY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH4R02UY?

STTH4R02UY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH4R02UY 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 STTH4R02UY?

For technical support, including STTH4R02UY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH4R02UY requirements.

6.How does Aetrix verify that STTH4R02UY is sourced from the original manufacturer or authorized distributors?

All STTH4R02UY 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 STTH4R02UY meets industry standards.

7.What is the process for return or replacement of STTH4R02UY?

All STTH4R02UY units undergo pre-shipment inspection (PSI). If there is an issue with STTH4R02UY, 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 STTH4R02UY part is unused and in its original packaging.

Return procedure for STTH4R02UY:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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