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

STMicroelectronics STTH3R06

Name: STTH3R06
Brand: STMicroelectronics
SKU: STTH3R06
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH3R06

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: STTH3R06.pdf

Description:: DIODE GEN PURP 600V 3A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:1,815

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Product details

Overview

STTH3R06 from STMicroelectronics is a 600 V, 3 A ultrafast recovery rectifier diode in DO-201AD, SMB, and SMC packages, featuring 35 ns max reverse recovery time, 1.00 V typ forward voltage at 3 A, and 175 °C max junction temperature. It serves as a freewheeling/clamping diode in offline SMPS, PFC stages, and snubber circuits where fast switching and low conduction loss are critical.

For engineers reviewing the STTH3R06 datasheet, STTH3R06 pinout, STTH3R06 application, or STTH3R06 equivalent, this page delivers verified electrical parameters, thermal resistance values, dynamic recovery behavior, package-specific mounting data, and real-world substitution guidance for high-voltage power conversion designs.

Technical Context

The STTH3R06 employs platinum-doped planar silicon technology to achieve soft, low-noise reverse recovery with a typical softness factor >1.5 at 125 °C and dIF/dt = 500 A/µs. Its ultrafast trr (≤35 ns) and low Qrr (typ. 25 nC at IF = 3 A) minimize switching losses in hard-switched topologies.

Thermal performance is optimized via low Rth(j-l): 20 °C/W (DO-201AD/SMC) and 25 °C/W (SMB), enabling reliable operation at 175 °C junction temperature under sustained 3 A average forward current with proper PCB copper area and lead length control.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	600 V - Withstands repetitive peak reverse voltage up to 600 V, suitable for 400 V DC bus applications with safety margin.
IF(AV)	3 A - Average forward current rating at TL = 80 °C (DO-201AD/SMC), defines continuous conduction capability in power supplies.
trr(max)	35 ns - Maximum reverse recovery time at IF = 1 A, dIF/dt = −50 A/µs, VR = 30 V; enables operation in 100+ kHz switchers.
VF(typ)	1.00 V - Typical forward voltage drop at IF = 3 A and Tj = 150 °C; directly determines conduction loss (P ≈ 1.03×IF(AV) + 0.09×IF²(RMS)).
Rth(j-l)	20 °C/W - Junction-to-lead thermal resistance for DO-201AD and SMC packages; sets minimum heatsinking requirement for thermal design.
IR(max)	100 µA - Max reverse leakage current at Tj = 150 °C and VR = VRRM; ensures low standby loss in high-temperature environments.

Pinout & Package

STTH3R06 is a two-terminal discrete diode. Cathode is marked by a band on the body; anode is unmarked. Package variants include DO-201AD (axial lead), SMB (surface-mount, cathode stripe on top), and SMC (larger surface-mount, cathode stripe on top). All variants use planar silicon die with platinum doping for controlled recovery.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to switching node (e.g., MOSFET drain) in freewheeling path; must handle surge current up to 55 A (DO-201AD).
Cathode	Forward current exit / reverse blocking terminal	Connected to output rail or ground return; carries full load current and blocks 600 V during off-state; marked with band/stripe.

Key Features

Feature	Design Value
Ultrafast recovery	trr ≤ 35 ns ensures minimal turn-off loss and EMI in high-frequency SMPS (≥100 kHz) and resonant converters.
Low VF at high Tj	VF = 1.00 V typ at 150 °C and 3 A reduces conduction loss drift over temperature vs. standard fast diodes.
Platinum-doped junction	Enables soft recovery (S factor >1.5) and low IR (≤100 µA at 150 °C), improving reliability in clamping/snubber roles.
ECOPACK-compliant	Meets RoHS and halogen-free requirements across all packages (DO-201AD, SMB, SMC), supporting green manufacturing.

Applications

Offline AC-DC Adapters

PFC Boost Diodes

Use Scenario: Secondary-side rectification in 30–65 W universal-input adapters with flyback topology.

IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; handles 3 A average current with 600 V reverse bias.

Use Value: 35 ns trr minimizes switching loss and audible noise; 1.00 V VF lowers thermal stress on compact PCB layouts.

Use Scenario: Output rectifier in active PFC boost stages for LED drivers and industrial power supplies.

IC Role / Device Role / Timing Role: High-voltage output diode blocking 400 V DC bus while conducting 3 A average current at 65–100 kHz.

Use Value: Low Qrr (25 nC typ) reduces boost switch turn-on loss; soft recovery suppresses voltage overshoot on MOSFET drain.

Snubber Networks

Inductive Load Demagnetization

Use Scenario: RCD snubber diode across MOSFETs in LLC resonant converters and half-bridge inverters.

IC Role / Device Role / Timing Role: Clamping transient voltage spikes during switching transitions; conducts brief high-di/dt pulses.

Use Value: 500 A/µs dIF/dt capability and 10 V VFP limit voltage ringing; platinum doping prevents snap-off failure.

Use Scenario: Demagnetization path for solenoids, relays, and transformer primary windings in automotive and industrial controls.

IC Role / Device Role / Timing Role: Provides low-loss return path for stored inductive energy; sustains 600 V reverse voltage during coil collapse.

Use Value: 175 °C Tj(max) supports operation near hot components; low leakage (<100 µA at 150 °C) avoids false triggering in safety-critical systems.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06	Lower VF (0.95 V typ at 150 °C), same trr (35 ns), same VRRM (600 V), but rated for 3 A at TL = 55 °C (SMB only)	Better conduction efficiency in thermally constrained SMB layouts; reduced thermal margin in high-ambient environments	Select when board space limits heatsinking and junction temperature stays below 150 °C.
ES3J (ON Semiconductor)	Same VRRM (600 V), IF(AV) = 3 A, trr = 35 ns, but higher VF (1.7 V typ at 25 °C) and no platinum doping	Higher conduction loss and harder recovery increase EMI risk in sensitive PFC or snubber roles	Acceptable for cost-sensitive, lower-frequency (<60 kHz) freewheeling where softness is noncritical.

Compared with STTH3L06 and ES3J, the STTH3R06 offers balanced trade-offs: superior thermal robustness (175 °C Tj, DO-201AD/SMC support), consistent soft recovery across temperature, and proven reliability in high-stress clamping applications-making it optimal for industrial-grade power conversion where long-term stability matters.

Availability

STTH3R06 is available at Aetrix Electronics and suitable for offline AC-DC adapters, active PFC boost stages, and snubber networks requiring stable component supply, extended temperature operation, and repeatable ultrafast recovery performance.

Supply support for STTH3R06 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 series targets high-efficiency power conversion, with the STTH3R06 specifically engineered for ultrafast, soft-recovery rectification in 600 V-class SMPS, PFC, and inductive load management applications.

FAQ

What is the maximum allowable junction temperature for STTH3R06?

The absolute maximum junction temperature (Tj(max)) is +175 °C, validated per datasheet DS3697 Rev 4. Operation at this limit requires strict thermal design: Rth(j-l) = 20 °C/W for DO-201AD/SMC, PCB copper area ≥1 cm² per lead, and ambient temperature ≤80 °C. Exceeding 175 °C risks irreversible degradation of the platinum-doped junction.

Does STTH3R06 have a specified softness factor, and why does it matter?

Yes-the softness factor (S) is ≥1.5 at Tj = 125 °C and dIF/dt = 500 A/µs (Figure 7). A high S factor indicates gradual current decay during reverse recovery, reducing voltage overshoot and EMI generation. This is critical in snubber and PFC applications where hard recovery could damage MOSFETs or fail EMC tests.

Can STTH3R06 replace standard FR306 or UF306 diodes in existing designs?

Yes, with verification: STTH3R06 matches FR306/UF306 in VRRM (600 V) and IF(AV) (3 A), but offers faster trr (35 ns vs. 50–100 ns), lower VF at high temperature, and softer recovery. Layout changes may be needed for SMB/SMC variants; DO-201AD is direct axial replacement. Thermal and EMI testing is recommended after substitution.

What is the recommended footprint for the SMC package variant (STTH3R06S)?

The official SMC footprint (Figure 19, DS3697 p.11) specifies pad dimensions: 5.11 mm × 8.19 mm overall, with 3.14 mm center-to-center spacing between pads and 1.54 mm pad width. Copper area ≥1 cm² per pad and 35 µm trace thickness are required to achieve Rth(j-a) ≤ 75 °C/W and sustain 3 A continuous current without exceeding Tj = 175 °C.

STTH3R06 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Cut Tape (CT)

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:: Through Hole

Supplier Device Package:: DO-201AD

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

STTH3R06 FAQ

1.How can I place an order for STTH3R06 through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH3R06 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 STTH3R06 reliable?

The price and inventory of STTH3R06 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH3R06 is usually 5 days.

3.What payment methods are accepted for STTH3R06?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH3R06 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH3R06?

STTH3R06 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH3R06 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 STTH3R06?

For technical support, including STTH3R06 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH3R06 requirements.

6.How does Aetrix verify that STTH3R06 is sourced from the original manufacturer or authorized distributors?

All STTH3R06 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 STTH3R06 meets industry standards.

7.What is the process for return or replacement of STTH3R06?

All STTH3R06 units undergo pre-shipment inspection (PSI). If there is an issue with STTH3R06, 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 STTH3R06 part is unused and in its original packaging.

Return procedure for STTH3R06:

1.Submit a request within 90 days.

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

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