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

STMicroelectronics STTH106

Name: STTH106
Brand: STMicroelectronics
SKU: STTH106
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH106

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: STTH106.pdf

Description:: DIODE GEN PURP 600V 1A DO41

Quantity:: RFQ Add To RFQ list

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Inventory:3,242

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Product details

Overview

STTH106 from STMicroelectronics is an ultrafast high-voltage rectifier diode using Turbo 2 technology, rated for 600 V repetitive peak reverse voltage, 1 A average forward current at 100°C (duty cycle 0.5), and 25 ns maximum reverse recovery time; it serves as a freewheeling diode in DC-DC converters and switching power supplies where low conduction and switching losses are critical.

For engineers reviewing the STTH106 datasheet, STTH106 pinout, STTH106 application, or STTH106 equivalent, key selection criteria include its 600 V V_RRM, 25 ns t_rr, 1.25 V max forward voltage at 150°C, DO-41 package thermal resistance of 45 °C/W (junction-to-lead), and suitability for high-frequency flyback and PFC stages requiring soft recovery behavior.

Technical Context

The STTH106 employs ST's Turbo 2 epitaxial process to achieve ultrafast recovery with softness factor >0.7 across dIF/dt up to 500 A/µs, minimizing EMI generation during turn-off. Its low Q_rr (≤100 nC at IF=1 A, dIF/dt=–50 A/µs) and low I_RM (≤2 A under same conditions) reduce snubber stress and gate drive loading in hard-switched topologies.

Thermal design is supported by R_th(j-l) = 45 °C/W and R_th(j-a) = 110 °C/W (epoxy FR4, 10 mm leads), enabling reliable operation up to T_j = +175°C. Reverse leakage remains ≤75 µA at 150°C and 600 V, ensuring stable blocking in high-temperature industrial inverters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - supports primary-side rectification in 400 V AC-input SMPS and solar microinverters without derating
t_rr (max)	25 ns - enables operation at ≥100 kHz with minimal switching loss penalty in flyback and LLC resonant converters
V_F (max)	1.25 V @ 1 A, 150°C - limits conduction loss to ≤1.25 W per diode in continuous 1 A RMS applications
I_F(AV)	1 A @ T_L = 100°C, δ = 0.5 - defines usable DC current capability with standard PCB trace heatsinking
R_th(j-l)	45 °C/W - allows direct thermal coupling to copper pour or chassis for junction temperature control below 175°C
Q_rr	≤100 nC @ IF = 1 A, dIF/dt = –50 A/µs - reduces voltage overshoot and snubber dissipation in hard-switched bridge legs

Pinout & Package

STTH106 is housed in a DO-41 axial-leaded plastic package (JEDEC DO-204AL), with cathode indicated by a band on the body. The device has two terminals: anode and cathode - no internal connections or multi-pin configuration.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in flyback secondary, ground return in PFC boost)
Cathode	Forward current exit / reverse blocking terminal	Marked with band; connects to output rail or positive bus; withstands 600 V reverse bias continuously

Key Features

Feature	Design Value
Ultrafast recovery	t_rr ≤ 25 ns ensures minimal dead-time loss and reduced EMI in 100–500 kHz SMPS designs
Soft recovery characteristic	S-factor > 0.7 suppresses voltage ringing and reduces snubber component stress in hard-switched circuits
High junction temperature rating	T_j(max) = +175°C enables use in sealed enclosures or high-ambient environments without forced cooling
Low thermal resistance	R_th(j-l) = 45 °C/W supports efficient heat transfer to PCB copper or metal chassis without heatsink

Applications

Switch-Mode Power Supply Output Rectification

Active Clamp Flyback Snubber Diode

Use Scenario: Secondary-side rectification in 20–100 W offline flyback converters with universal AC input.

IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; recovers before next switching cycle.

Use Value: 25 ns t_rr and soft recovery minimize output voltage overshoot and reduce need for RC snubbers.

Use Scenario: Clamp path in active-clamp flyback converters operating at 200–300 kHz.

IC Role / Device Role / Timing Role: Fast-recovery clamp diode returning energy from transformer leakage inductance to clamp capacitor.

Use Value: Low Q_rr (≤100 nC) and <1.25 V V_F limit clamp loss and improve efficiency over silicon standard recovery diodes.

PFC Boost Diode

Inverter DC Bus Freewheeling

Use Scenario: Output rectifier in continuous-conduction-mode (CCM) PFC boost stages for LED drivers and industrial PSUs.

IC Role / Device Role / Timing Role: High-voltage, high-frequency rectifier handling 600 V reverse stress and 50–100 kHz switching.

Use Value: 600 V V_RRM and 175°C T_j rating ensure reliability under line surge and thermal cycling.

Use Scenario: Freewheeling path for inductive loads in 3-phase motor drives and UPS inverters.

IC Role / Device Role / Timing Role: Bidirectional current path during PWM dead time; blocks DC bus voltage during reverse polarity.

Use Value: Low I_R (≤75 µA @ 150°C) prevents thermal runaway in parallel-connected modules.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	Same die technology, identical V_RRM, t_rr, and package; updated marking and RoHS-compliant finish	No functional difference; fully interchangeable in legacy and new designs	Select STTH1R06 for new designs requiring current compliance and long-term availability
UF4007	Higher t_rr (≈75 ns), higher V_F (1.7 V typ), same DO-41 package and 1000 V V_RRM	Acceptable only in ≤50 kHz applications with relaxed EMI and efficiency targets	Use UF4007 only if cost sensitivity outweighs efficiency and noise requirements

Compared with STTH1R06, the STTH106 offers identical electrical performance but lacks current RoHS documentation; versus UF4007, it delivers 3× faster recovery and 0.45 V lower forward drop at 150°C-critical for thermally constrained 100 kHz+ designs.

Availability

STTH106 is available at Aetrix Electronics and suitable for switching power supplies, motor drive freewheeling paths, and PFC boost rectification requiring stable component supply and proven high-temperature reliability.

Supply support for STTH106 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 analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The STTH series belongs to ST's high-voltage ultrafast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion systems where low Q_rr, soft recovery, and 175°C operation are mandatory.

FAQ

Is STTH106 still in active production?

No-STTH106 is marked as obsolete in ST's official documentation. However, Aetrix Electronics maintains legacy inventory with full traceability and provides engineering support for continuity in existing designs. STTH1R06 is the recommended replacement with identical specs and current manufacturing status.

What is the maximum allowable dIF/dt for STTH106?

STTH106 is characterized up to 500 A/µs in datasheet Figure 5–10. At dIF/dt = 500 A/µs and T_j = 125°C, t_rr remains ≤45 ns and S-factor stays >0.7. Exceeding this may increase I_RM and EMI; layout must minimize stray inductance to avoid voltage overshoot.

Can STTH106 be used in parallel configurations?

Parallel operation is not recommended due to parameter spread in t_rr and V_F, which causes current imbalance and thermal runaway. If required, use matched lots with pre-binned V_F and t_rr, plus individual ballast resistors (≥0.1 Ω) and symmetrical PCB layout.

How does junction capacitance affect STTH106 in high-frequency designs?

At VR = 400 V, C_j ≈ 25 pF (Fig. 11). This low capacitance minimizes displacement current during turn-off and reduces capacitive switching loss in >100 kHz topologies. It also lowers EMI filter burden compared to standard recovery diodes with >100 pF C_j.

STTH106 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Cut Tape (CT)

Product Status:: Obsolete

Technology:: Standard

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

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.7 V @ 1 A

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

Reverse Recovery Time (trr):: 45 ns

Current - Reverse Leakage @ Vr:: 1 µA @ 600 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-41

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

STTH106 FAQ

1.How can I place an order for STTH106 through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH106 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 STTH106 reliable?

The price and inventory of STTH106 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH106 is usually 5 days.

3.What payment methods are accepted for STTH106?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH106 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH106?

STTH106 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH106 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 STTH106?

For technical support, including STTH106 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH106 requirements.

6.How does Aetrix verify that STTH106 is sourced from the original manufacturer or authorized distributors?

All STTH106 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 STTH106 meets industry standards.

7.What is the process for return or replacement of STTH106?

All STTH106 units undergo pre-shipment inspection (PSI). If there is an issue with STTH106, 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 STTH106 part is unused and in its original packaging.

Return procedure for STTH106:

1.Submit a request within 90 days.

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

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