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

STMicroelectronics STTH3R06U

Name: STTH3R06U
Brand: STMicroelectronics
SKU: STTH3R06U
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH3R06U

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: STTH3R06U.pdf

Description:: DIODE GEN PURP 600V 3A SMB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STTH3R06U from STMicroelectronics is an ultrafast recovery rectifier diode in SMB package, rated for 600 V repetitive peak reverse voltage and 3 A average forward current, with 35 ns maximum reverse recovery time and 1.00 V typical forward voltage drop at 25 °C - deployed in snubber circuits and freewheeling paths of offline SMPS and auxiliary power supplies.

For engineers reviewing the STTH3R06U datasheet, STTH3R06U pinout, STTH3R06U application, or STTH3R06U equivalent, key selection criteria include trr ≤ 35 ns at IF = 1 A / dIF/dt = −50 A/µs, VF ≤ 1.25 V at TJ = 150 °C, thermal resistance Rth(j-l) = 25 °C/W (SMB), and ECOPACK-compliant lead-free construction.

Technical Context

This diode employs platinum-doped planar junction technology to achieve low leakage (<3 µA at 25 °C, <100 µA at 150 °C) and soft reverse recovery (softness factor >1.0 at dIF/dt = 500 A/µs), enabling reduced EMI in high-frequency switching converters.

Its dynamic performance is characterized by a 30–35 ns trr window under standard test conditions (IF = 0.5–1 A, VR = 30 V), with forward recovery voltage VFP ≤ 10 V and tfr ≤ 100 ns - critical for minimizing voltage overshoot during turn-on in clamping and demagnetization topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	600 V - supports primary-side rectification in universal-input 85–265 VAC offline converters without derating.
IF(AV)	3 A at TL = 55 °C (SMB) - defines continuous conduction capability in auxiliary windings and low-power secondary rails.
trr(max.)	35 ns - enables operation up to ~3 MHz switching frequency before recovery losses dominate efficiency.
VF(typ.)	1.00 V at TJ = 25 °C, IF = 3 A - contributes to conduction loss P ≈ 1.03×IF(AV) + 0.09×IF²(RMS) per AN604.
Rth(j-l)	25 °C/W (SMB) - determines thermal rise above PCB lead temperature under steady-state 3 A load.
IR(max.)	100 µA at TJ = 150 °C - ensures minimal standby power loss in high-temperature environments like enclosed power adapters.

Pinout & Package

The STTH3R06U is housed in an SMB (DO-214AA) surface-mount package with two terminals: anode and cathode. The package complies with JEDEC DO-214AA outline, features gull-wing leads, and is lead-free and ECOPACK-compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to switching node (e.g., MOSFET drain) in freewheeling or clamping configuration.
Cathode	Forward current exit point	Biased toward higher potential rail (e.g., output capacitor positive terminal) to complete current path.

Key Features

Feature	Design Value
Ultrafast recovery	trr ≤ 35 ns ensures minimal reverse recovery charge (Qrr) and low EMI in 100–500 kHz SMPS designs.
Low VF at high temperature	VF = 1.25 V max at TJ = 150 °C maintains predictable conduction loss across industrial temperature range.
Platinum doping	Reduces minority carrier lifetime to achieve soft recovery and <100 µA IR at 150 °C.
Planar junction	Enables precise control of breakdown voltage and reproducible trr distribution across production lots.

Applications

Offline AC-DC Adapters

Industrial SMPS Auxiliary Supplies

Use Scenario: 12 V/0.5 A auxiliary bias supply derived from main transformer auxiliary winding in 65 W laptop adapter.

IC Role / Device Role / Timing Role: Freewheeling diode providing return path during MOSFET off-time; handles 3 A peak currents with <35 ns recovery to minimize ringing.

Use Value: Low VF and soft recovery reduce heat generation and EMI filtering component count versus standard fast recovery diodes.

Use Scenario: Isolated 24 V standby rail in programmable logic controller (PLC) power module operating continuously at 70 °C ambient.

IC Role / Device Role / Timing Role: Clamping diode across relay coil or IGBT gate driver transformer, absorbing inductive kickback within 35 ns.

Use Value: 175 °C max junction temperature and 100 µA IR at 150 °C ensure long-term reliability without thermal runaway.

LED Driver Snubbers

Motor Drive Demagnetization

Use Scenario: RC-snubber diode across MOSFET in constant-current LED driver for street lighting (input 277 VAC, 100 kHz switching).

IC Role / Device Role / Timing Role: Fast-recovery path for snubber capacitor discharge; conducts only during brief voltage reversal phase.

Use Value: 30–35 ns trr prevents re-conduction delay that would increase snubber loss and MOSFET voltage stress.

Use Scenario: Demagnetization path for stepper motor H-bridge flyback energy in HVAC actuator control board.

IC Role / Device Role / Timing Role: Provides low-loss return path for inductive current decay after bridge turn-off; operates at 20 kHz PWM.

Use Value: 1.00 V VF at 25 °C and 25 °C/W Rth(j-l) limit junction temperature rise to <40 °C above PCB under 3 A pulsed load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR360	Same VRRM (600 V), IF(AV) = 3 A, but trr = 60 ns (max); VF = 1.7 V (typ) at 25 °C.	Higher trr increases EMI and limits usable switching frequency to ≤200 kHz; higher VF raises conduction loss by ~40%.	Select when cost sensitivity outweighs EMI and efficiency requirements in non-critical auxiliary rails.
Vishay VS-3EY60	VRRM = 600 V, IF(AV) = 3 A, trr = 35 ns (same), but VF = 1.3 V (typ) at 25 °C and Rth(j-l) = 30 °C/W (SMA).	Higher VF and thermal resistance reduce efficiency and require larger copper area for thermal management.	Prefer only if SMB footprint compatibility is not required and SMA mounting is acceptable.

Compared with MUR360 and VS-3EY60, STTH3R06U delivers lower conduction loss (1.00 V VF), superior thermal performance (25 °C/W), and identical ultrafast timing - making it optimal for space-constrained, high-efficiency auxiliary and snubber circuits where SMB mounting is specified.

Availability

STTH3R06U is available at Aetrix Electronics and suitable for offline AC-DC adapters, industrial SMPS auxiliary supplies, and LED driver snubbers requiring stable component supply, RoHS-compliant packaging, and consistent ultrafast recovery performance.

Supply support for STTH3R06U 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STTH series targets high-efficiency power conversion systems, with STTH3R06U specifically engineered for ultrafast switching in compact surface-mount auxiliary and snubber applications where low VF, soft recovery, and thermal robustness are essential.

FAQ

What is the maximum junction temperature rating for STTH3R06U?

The STTH3R06U has a maximum operating junction temperature (Tj) of +175 °C, verified per absolute ratings table in DS3697 Rev 4. This allows reliable operation in enclosed industrial power supplies where ambient temperatures reach 70–85 °C and PCB trace heating adds 20–30 °C rise.

Does STTH3R06U have a soft recovery characteristic?

Yes - platinum doping yields a softness factor >1.0 across dIF/dt = 100–500 A/µs (Figure 7), confirmed by low peak reverse recovery current (IRM) and gradual current decay. This reduces voltage overshoot and EMI in hard-switched topologies like flyback snubbers.

Is STTH3R06U lead-free and RoHS compliant?

Yes - the SMB package is lead-free and ECOPACK-compliant, meeting RoHS Directive 2011/65/EU. ST's ECOPACK documentation confirms this grade applies to all STTH3R06U tape-and-reel shipments, with no exemption required for lead content.

Can STTH3R06U replace DO-201AD-packaged STTH3R06 in existing designs?

No - STTH3R06U uses SMB (DO-214AA) while STTH3R06 uses DO-201AD. Footprint, thermal resistance (25 vs 20 °C/W), and solder profile differ. Migration requires PCB layout revision and thermal validation per AN5088 guidelines for SMB mounting.

STTH3R06U Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 600 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1.7 V @ 3 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 3 µA @ 600 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMB

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

STTH3R06U FAQ

1.How can I place an order for STTH3R06U through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH3R06U 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 STTH3R06U reliable?

The price and inventory of STTH3R06U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH3R06U is usually 5 days.

3.What payment methods are accepted for STTH3R06U?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH3R06U transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH3R06U?

STTH3R06U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH3R06U 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 STTH3R06U?

For technical support, including STTH3R06U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH3R06U requirements.

6.How does Aetrix verify that STTH3R06U is sourced from the original manufacturer or authorized distributors?

All STTH3R06U 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 STTH3R06U meets industry standards.

7.What is the process for return or replacement of STTH3R06U?

All STTH3R06U units undergo pre-shipment inspection (PSI). If there is an issue with STTH3R06U, 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 STTH3R06U part is unused and in its original packaging.

Return procedure for STTH3R06U:

1.Submit a request within 90 days.

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

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