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

STMicroelectronics STTH2R02Q

Name: STTH2R02Q
Brand: STMicroelectronics
SKU: STTH2R02Q
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH2R02Q

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: STTH2R02Q.pdf

Description:: DIODE GEN PURP 200V 2A DO15

Quantity:: RFQ Add To RFQ list

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Inventory:4,504

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Product details

Overview

STTH2R02Q from STMicroelectronics is a 200 V, 2 A ultrafast recovery diode optimized for high-frequency switching applications including flyback snubbers, LED driver freewheeling paths, and auxiliary power supply rectification. It features a typical forward voltage of 0.7 V at 2 A, 15 ns reverse recovery time (trr), and 175 °C maximum junction temperature in SMA/SMB packages.

For engineers reviewing the STTH2R02Q datasheet, STTH2R02Q pinout, STTH2R02Q application, or STTH2R02Q equivalent, key selection criteria include conduction loss minimization (VF = 0.7 V typ.), ultrafast soft recovery (trr = 15 ns @ dIF/dt = −100 A/µs), thermal robustness (Tj(max) = 175 °C), and ECOPACK®2 compliance for industrial-grade reliability.

Technical Context

The STTH2R02Q employs ST's patented planar platinum-doped silicon technology to achieve low VF and negligible switching losses. Its ultrafast recovery (trr ≤ 20 ns under rated conditions) and low IRM (≤4 A) enable efficient operation in 100–500 kHz SMPS topologies without oscillation or EMI penalties.

Designed for unidirectional current flow with soft reverse recovery characteristics, it supports both freewheeling and polarity protection functions. The device operates reliably up to 175 °C junction temperature and maintains stable VF across Tj = 25–150 °C (0.70–0.85 V at IF = 2 A).

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	200 V - Withstands repetitive reverse voltage up to 200 V, suitable for 110/220 VAC input-derived auxiliary rails.
IF(AV)	2 A - Average forward current rating at TL = 90 °C, enabling continuous conduction in compact LED drivers and standby supplies.
VF(typ.)	0.7 V @ IF = 2 A, Tj = 25 °C - Low conduction loss reduces heat generation and improves system efficiency by ~0.5 W vs. standard fast diodes.
trr(typ.)	15 ns @ IF = 1 A, dIF/dt = −100 A/µs, VR = 30 V - Enables clean turn-off in high-frequency flyback and resonant converters without voltage overshoot.
Tj(max.)	175 °C - Allows operation in thermally constrained environments such as enclosed LED luminaires or sealed industrial PSUs.
Rth(j-l)	30 °C/W - Junction-to-lead thermal resistance enables direct PCB copper pad heatsinking without external heatsinks in <5 W designs.

Pinout & Package

Packaged in industry-standard SMA (DO-214AC) and SMB (DO-214AA) surface-mount outlines, both featuring cathode band marking and lead-free, RoHS-compliant construction per ECOPACK®2.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to switch node or transformer secondary; must withstand IFSM = 75 A surge (10 ms sine).
Cathode	Forward current exit / reverse blocking terminal	Marked by band; ties to output rail or ground return; handles full VRRM during off-state.

Key Features

Feature	Design Value
Ultrafast soft recovery	trr = 15 ns typ., IRM ≤ 4 A - Minimizes switching noise and EMI in high-dV/dt environments.
Low forward voltage	VF = 0.7 V typ. @ 2 A - Reduces conduction loss by >30% vs. standard fast recovery diodes (e.g., UF4007).
High thermal capability	Tj(max) = 175 °C - Supports operation in sealed enclosures or high-ambient industrial lighting fixtures.
ECOPACK®2 compliance	Lead-free, halogen-free, RoHS-compliant packaging - Meets EU environmental directives without performance trade-offs.

Applications

LED Driver Freewheeling

Auxiliary Power Supply Rectifier

Use Scenario: High-efficiency constant-current LED driver using buck or flyback topology with synchronous or diode-based freewheeling path.

IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; critical for energy transfer and current continuity.

Use Value: Ultrafast trr prevents reverse recovery spikes that distort current waveform and degrade dimming linearity.

Use Scenario: 5–12 V auxiliary winding rectification in main SMPS for control IC bias and gate drive.

IC Role / Device Role / Timing Role: Output rectifier handling low-voltage, medium-current DC output with minimal ripple and loss.

Use Value: Low VF (0.7 V) reduces dropout and improves regulation margin under light-load conditions.

Flyback Snubber Diode

Polarity Protection in Industrial PSU

Use Scenario: Clamp diode in RCD snubber network across primary-side transformer winding.

IC Role / Device Role / Timing Role: Fast turn-on to absorb leakage inductance energy; must recover before next switching cycle.

Use Value: 15 ns trr ensures full recovery within typical 500 kHz–1 MHz switching periods, preventing snap-off failure.

Use Scenario: Reverse-polarity protection on DC input of industrial programmable logic controller (PLC) power module.

IC Role / Device Role / Timing Role: Series-blocking diode preventing damage during field wiring errors.

Use Value: 175 °C Tj(max) and 200 V VRRM ensure reliable operation in hot, dusty cabinet environments with wide input voltage tolerance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R02U	SMB package (DO-214AA); higher thermal mass (0.107 g vs. 0.068 g); same electrical specs.	Better thermal dissipation in higher-power auxiliary rails (>3 W); slightly larger footprint.	Select when board layout allows SMB and thermal margin is prioritized over space.
ON Semiconductor MUR220	200 V, 2 A; trr = 35 ns typ.; VF = 0.975 V @ 2 A - slower, higher conduction loss.	Acceptable in lower-frequency (<100 kHz) flyback or linear regulator inputs where EMI is less critical.	Choose only if cost sensitivity outweighs efficiency and EMI requirements.

Compared with STTH2R02U and MUR220, the STTH2R02Q delivers superior high-frequency performance (15 ns trr) and lowest conduction loss (0.7 V VF), making it optimal for compact, high-efficiency LED drivers and fast-switching auxiliary supplies where thermal and EMI constraints are tight.

Availability

STTH2R02Q is available at Aetrix Electronics and suitable for LED lighting drivers, auxiliary power supply rectification, and flyback snubber circuits requiring stable component supply and long-term industrial availability.

Supply support for STTH2R02Q 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 industrial, automotive, and consumer markets.

The STTH series targets high-efficiency, high-reliability power conversion applications-specifically engineered for ultrafast switching, low-loss rectification, and thermal resilience in compact power supplies and lighting systems.

FAQ

What is the maximum allowable peak forward surge current for STTH2R02Q?

The STTH2R02Q supports IFSM = 75 A for a non-repetitive 10 ms sinusoidal pulse at 25 °C. This rating applies to transient events like inrush or short-circuit recovery and must be derated linearly to zero at Tj = 175 °C per ST's absolute ratings table.

Does STTH2R02Q have a specified reverse recovery charge (QRR)?

Yes-QRR is characterized in Figure 7 of DS4744. At IF = 2 A, VR = 160 V, and Tj = 25 °C, QRR is approximately 12 nC (typical). At Tj = 125 °C, QRR rises to ~22 nC, directly impacting switching loss in hard-switched topologies.

Can STTH2R02Q be used in place of a standard FR107 diode?

No-FR107 is a 1000 V, 1 A fast recovery diode with trr ≈ 500 ns. STTH2R02Q has lower VRRM (200 V) but vastly faster recovery (15 ns) and higher IF(AV) (2 A). Substitution is only valid in low-voltage, high-frequency designs where voltage rating and thermal limits are verified.

Is the STTH2R02Q available in tape-and-reel packaging?

Yes-STTH2R02Q is supplied in tape-and-reel format: STTH2R02A (SMA) in 5000-unit reels and STTH2R02U (SMB) in 2500-unit reels. Both meet JEDEC standards and are compatible with automated SMT placement equipment.

STTH2R02Q Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 2 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:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-15

Operating Temperature - Junction:: 175°C (Max)

STTH2R02Q FAQ

1.How can I place an order for STTH2R02Q through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH2R02Q 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 STTH2R02Q reliable?

The price and inventory of STTH2R02Q are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH2R02Q is usually 5 days.

3.What payment methods are accepted for STTH2R02Q?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH2R02Q transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH2R02Q?

STTH2R02Q orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH2R02Q 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 STTH2R02Q?

For technical support, including STTH2R02Q datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH2R02Q requirements.

6.How does Aetrix verify that STTH2R02Q is sourced from the original manufacturer or authorized distributors?

All STTH2R02Q 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 STTH2R02Q meets industry standards.

7.What is the process for return or replacement of STTH2R02Q?

All STTH2R02Q units undergo pre-shipment inspection (PSI). If there is an issue with STTH2R02Q, 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 STTH2R02Q part is unused and in its original packaging.

Return procedure for STTH2R02Q:

1.Submit a request within 90 days.

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

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