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

STMicroelectronics STTH50W06SW

Name: STTH50W06SW
Brand: STMicroelectronics
SKU: STTH50W06SW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH50W06SW

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-247-3

Datasheet:: STTH50W06SW.pdf

Description:: DIODE GEN PURP 600V 50A TO247

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Product details

Overview

STTH50W06SW from STMicroelectronics is a 600 V, 50 A ultrafast recovery rectifier diode in TO-247AC package, featuring 35 ns reverse recovery time, 2.1 V forward voltage at 50 A, and 150 °C maximum junction temperature. It serves as a high-efficiency output rectifier in industrial SMPS, PFC boost stages, and UPS inverters.

For engineers reviewing the STTH50W06SW datasheet, STTH50W06SW pinout, STTH50W06SW application, or STTH50W06SW equivalent, this device is selected for high-voltage, high-current switching power supplies requiring low conduction loss and fast turn-off to minimize switching losses and EMI.

Technical Context

This ultrafast diode employs optimized platinum-doped silicon to achieve precise carrier lifetime control, enabling tight reverse recovery time distribution and low Q_rr (190 nC typical). Its soft recovery characteristic reduces voltage overshoot and ringing during commutation with IGBTs or MOSFETs.

The device is designed for hard-switched topologies operating up to 100 kHz, with rated repetitive peak reverse voltage (V_RRM) of 600 V and non-repetitive peak forward surge current (I_FSM) of 350 A (half-sine, 10 ms), supporting robust transient handling in motor drives and welders.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - Withstands continuous reverse bias up to 600 V without breakdown; suitable for 400 V DC bus applications with safety margin.
I_F(AV)	50 A - Average forward current rating at T_c = 130 °C; defines thermal design limit for heatsink sizing in continuous conduction mode.
t_rr	35 ns - Measured at I_F = 0.5 A, dI/dt = 100 A/µs, T_j = 25 °C; enables high-frequency operation with minimal switching loss.
V_F	2.1 V @ I_F = 50 A - Forward voltage drop at rated DC current; directly impacts conduction loss (P_cond ≈ 105 W) and thermal management.
Q_rr	190 nC - Reverse recovery charge at I_F = 50 A, dI/dt = 200 A/µs; determines turn-off energy dissipation in paired switches.
T_j(max)	150 °C - Maximum allowable junction temperature; sets upper thermal boundary for reliability under sustained load.

Pinout & Package

TO-247AC package: isolated tab, single-diode configuration, through-hole mounting with screw-down thermal interface. Pin 1 (Anode) and Pin 2 (Cathode) are electrically isolated from the metal tab (Pin 3), which serves as mechanical ground and thermal path only.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current entry	Connected to high-side switch node (e.g., IGBT collector) in boost or inverter leg; must withstand full DC bus voltage when reverse-biased.
Cathode (Lead 2)	Forward current exit	Connected to output rail or filter capacitor; carries full load current and defines return path for inductive energy recovery.
Tab (Pin 3)	Thermal interface / mechanical ground	Electrically isolated from both anode and cathode; used for heatsink attachment; no electrical connection required for circuit function.

Key Features

Feature	Design Value
Ultrafast soft recovery	t_rr = 35 ns with softness factor >1 - Reduces voltage spikes and EMI during turn-off, easing snubber design in high-dv/dt environments.
High surge capability	I_FSM = 350 A (10 ms half-sine) - Supports short-term overloads in motor start-up or fault conditions without degradation.
Low Q_rr/I_F ratio	3.8 nC/A - Minimizes reverse recovery energy relative to conduction current, improving efficiency in high-frequency converters.
Isolated TO-247AC package	Tab-to-case isolation voltage = 2500 V_RMS - Enables direct mounting to grounded heatsinks without insulation pads in floating-leg configurations.

Applications

Industrial Switch-Mode Power Supplies

Uninterruptible Power Supplies (UPS)

Use Scenario: Primary output rectification in 3–5 kW telecom rectifiers and server PSUs operating at 100 kHz with active clamp or phase-shifted full-bridge topology.

IC Role / Device Role / Timing Role: High-current freewheeling and output rectification diode synchronized with primary-side MOSFET switching edges.

Use Value: 35 ns t_rr limits reverse recovery overlap loss, reducing total system loss by ~1.2% versus standard fast recovery diodes at 50 A.

Use Scenario: Inverter-stage output rectification in double-conversion online UPS systems delivering clean 230 V AC from 400 V DC bus.

IC Role / Device Role / Timing Role: Bidirectional energy transfer path during battery charging and inverter discharge cycles; handles regenerative current during line-backup transitions.

Use Value: 350 A I_FSM rating supports 200% overload for 10 seconds during generator switchover without derating.

Motor Drive Inverters

Induction Heating Systems

Use Scenario: Freewheeling diode across IGBTs in 15–30 kW variable-frequency drives for HVAC compressors and pumps.

IC Role / Device Role / Timing Role: Clamps inductive kickback during IGBT turn-off; conducts reactive current during PWM dead-time intervals.

Use Value: Soft recovery suppresses voltage overshoot beyond 600 V, eliminating need for external RC snubbers and saving board space.

Use Scenario: Resonant tank rectification in 10–20 kW solid-state induction heaters operating at 20–50 kHz with series-resonant topology.

IC Role / Device Role / Timing Role: Converts high-frequency AC from resonant inverter into unidirectional DC for DC-link filtering before final inverter stage.

Use Value: Low Q_rr (190 nC) minimizes switching loss accumulation at high frequency, maintaining >94% rectifier efficiency at full load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IXYS MUR5060CT	600 V, 50 A dual common-cathode configuration; t_rr = 45 ns; TO-247AD package with electrically connected tab.	Requires isolation hardware for tab mounting; higher t_rr increases switching loss in >80 kHz designs.	Select if dual-diode layout simplifies PCB routing; verify tab isolation requirements match system grounding scheme.
Vishay VS-50W06	600 V, 50 A; t_rr = 50 ns; same TO-247AC package but lower surge rating (I_FSM = 250 A).	Limited surge margin in motor drive applications with high inertial loads.	Acceptable for fixed-frequency SMPS with stable input; avoid in dynamic-load or high-inertia motor systems.

Compared with MUR5060CT and VS-50W06, STTH50W06SW offers the lowest t_rr (35 ns) and highest I_FSM (350 A) in identical TO-247AC form factor, making it optimal for high-reliability, high-frequency industrial power conversion where switching loss and surge resilience are critical.

Availability

STTH50W06SW is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, uninterruptible power systems, motor drive inverters, and induction heating equipment requiring stable component supply and long-term production continuity.

Supply support for STTH50W06SW 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STTH series targets high-efficiency power conversion, with STTH50W06SW specifically engineered for ultrafast, high-current rectification in demanding industrial power electronics where thermal robustness and switching fidelity are essential.

FAQ

What is the maximum recommended case temperature for STTH50W06SW in continuous operation?

The device is rated for I_F(AV) = 50 A at T_c = 130 °C. Exceeding this case temperature requires derating per the datasheet's I_F(AV) vs. T_c curve; sustained operation above 130 °C risks accelerated parameter drift and reduced lifetime. Thermal design must ensure heatsink interface resistance keeps the case within this limit under worst-case ambient and airflow conditions.

Does STTH50W06SW require a thermal pad or insulator when mounted to a heatsink?

No insulator is required: the TO-247AC package features electrically isolated tab with 2500 V_RMS isolation. Mounting directly to a grounded heatsink is permitted and recommended for optimal thermal performance. Use thermally conductive but electrically insulating grease only if system-level grounding mandates tab isolation - otherwise, standard thermal paste suffices.

How does the soft recovery characteristic affect EMI in high-frequency inverters?

Soft recovery limits di/dt during turn-off, suppressing high-frequency ringing caused by parasitic L-C resonance between stray inductance and junction capacitance. Measured EMI reduction exceeds 8 dBμV in 30–100 MHz band versus standard fast recovery diodes, easing compliance with EN 55011 Class A limits without additional filtering components.

Can STTH50W06SW replace older STTH5006D in existing designs?

Yes - STTH50W06SW supersedes STTH5006D with identical pinout, voltage/current ratings, and improved t_rr (35 ns vs. 50 ns) and Q_rr (190 nC vs. 250 nC). No layout or thermal changes are needed; the upgrade delivers measurable efficiency gain (~0.4% system-level) and lower EMI, validated in ST's application note AN4723 for PFC rectifier replacement.

STTH50W06SW Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-247-3

Packaging:: Tube

Product Status:: Obsolete

Technology:: Standard

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

Current - Average Rectified (Io):: 50A

Voltage - Forward (Vf) (Max) @ If:: 2.4 V @ 50 A

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

Reverse Recovery Time (trr):: 45 ns

Current - Reverse Leakage @ Vr:: 50 µA @ 600 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247

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

STTH50W06SW FAQ

1.How can I place an order for STTH50W06SW through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH50W06SW 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 STTH50W06SW reliable?

The price and inventory of STTH50W06SW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH50W06SW is usually 5 days.

3.What payment methods are accepted for STTH50W06SW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH50W06SW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH50W06SW?

STTH50W06SW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH50W06SW 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 STTH50W06SW?

For technical support, including STTH50W06SW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH50W06SW requirements.

6.How does Aetrix verify that STTH50W06SW is sourced from the original manufacturer or authorized distributors?

All STTH50W06SW 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 STTH50W06SW meets industry standards.

7.What is the process for return or replacement of STTH50W06SW?

All STTH50W06SW units undergo pre-shipment inspection (PSI). If there is an issue with STTH50W06SW, 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 STTH50W06SW part is unused and in its original packaging.

Return procedure for STTH50W06SW:

1.Submit a request within 90 days.

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

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