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

STMicroelectronics STTH6012WL

Name: STTH6012WL
Brand: STMicroelectronics
SKU: STTH6012WL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH6012WL

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-247-2

Datasheet:: STTH6012WL.pdf

Description:: DIODE GP 1.2KV 60A DO247 LL

Quantity:: RFQ Add To RFQ list

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Inventory:946

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Product details

Overview

STTH6012WL from STMicroelectronics is an ultrafast, soft-recovery 1200 V, 60 A high-voltage rectifier diode in DO-247 LL package, optimized for high-frequency switching and high-pulsed-current operation in industrial power conversion. It delivers typ. 1.30 V forward voltage at 150 °C, 50 ns reverse recovery time (trr), and 30 µA leakage at 25 °C - enabling low conduction and switching losses in solar inverters and EV charging stations.

For engineers reviewing the STTH6012WL datasheet, STTH6012WL pinout, STTH6012WL application, or STTH6012WL equivalent, key selection criteria include junction-to-case thermal resistance (0.22–0.31 °C/W), softness factor >1.0 at 200 A/µs, and rugged 400 A non-repetitive surge rating - critical for freewheeling and snubber functions in mission-critical rectification.

Technical Context

This diode employs a planar passivated silicon structure with optimized carrier lifetime control to achieve ultrafast recovery while maintaining soft turn-off behavior - minimizing voltage overshoot and EMI in hard-switched topologies. Its low IR (≤300 µA at 125 °C) and high Tj(max) of 175 °C support stable operation under sustained thermal stress.

The device is characterized for dynamic performance across dIF/dt up to 500 A/µs, with trr decreasing from 85 ns to 50 ns as dIF/dt increases from 100 to 200 A/µs - confirming design suitability for high-dI/dt DC-AC stages and active clamp circuits requiring predictable reverse recovery charge (QRR = 9700 nC).

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	1200 V - supports primary-side rectification in 1000 V-class PV string inverters and telecom 48 V–600 V bus architectures.
IF(AV)	60 A at TC = 130 °C (DO-247 LL) - enables continuous conduction mode operation in 5–10 kW industrial SMPS without forced air cooling.
VF(typ.)	1.30 V at Tj = 150 °C, IF = 60 A - reduces conduction loss to ~78 W per device in high-current freewheeling paths.
trr(typ.)	50 ns at Tj = 125 °C, dIF/dt = −200 A/µs - ensures clean commutation in 100 kHz+ phase-shifted full-bridge converters.
QRR	9700 nC - defines recoverable energy dissipation during turn-off; directly impacts snubber sizing and MOSFET voltage stress.
Rth(j-c)	0.22–0.31 °C/W - allows direct heatsink mounting with <10 K/W system thermal resistance to sustain 60 A average current.
Tj(max)	175 °C - extends operational margin beyond standard 150 °C diodes, supporting compact packaging in sealed UPS enclosures.

Pinout & Package

STTH6012WL uses the DO-247 LL package - a high-thermal-performance, axial-leaded, epoxy-molded outline with enhanced copper baseplate for improved heat extraction. Mounting torque: 0.8 N·m (recommended), max 1.0 N·m. UL94 V0 compliant epoxy.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Current entry terminal during forward conduction	Connected to high-side switch node in boost PFC or inverter leg; must withstand 400 A surge pulses.
Cathode (K)	Current exit terminal during forward conduction	Directly bonded to heatsink via case; serves as thermal and electrical reference point for gate drivers in half-bridge configurations.

Key Features

Feature	Design Value
Ultrafast soft recovery	trr ≤ 50 ns with softness factor >1.0 at 200 A/µs - suppresses voltage ringing and reduces EMI filter burden in high-dI/dt applications.
Low leakage current	IR ≤ 30 µA at 25 °C, ≤300 µA at 125 °C - minimizes thermal runaway risk in parallel-connected arrays and high-temperature ambient deployments.
High junction temperature capability	Tj(max) = 175 °C - enables derating-free operation in enclosed industrial drives where ambient exceeds 85 °C.
ECOPACK2 compliance	Halogen-free, RoHS-compliant construction - satisfies environmental requirements for EU and global industrial equipment certifications.
High surge robustness	IFS M = 400 A (10 ms sinusoidal) - sustains transient overloads during motor startup or grid fault conditions without degradation.

Applications

Solar String Inverter DC-DC Stage

EV Onboard Charger Boost PFC

Use Scenario: High-efficiency DC-DC conversion between PV array (up to 1500 V) and battery-side DC bus in string inverters.

IC Role / Device Role / Timing Role: Ultrafast freewheeling diode in interleaved LLC resonant converter secondary side.

Use Value: 50 ns trr and soft recovery reduce switching losses by ≥18% vs. standard fast diodes, improving system efficiency from 98.2% to 98.5% at full load.

Use Scenario: Boost PFC rectification in 11 kW AC–DC stage of bidirectional EV onboard chargers.

IC Role / Device Role / Timing Role: Primary-side output rectifier handling 60 A average current at 100 kHz switching frequency.

Use Value: 1.30 V VF at 150 °C lowers conduction loss by 2.1 W per device versus competing 1200 V diodes, reducing heatsink size by 35%.

Industrial UPS Inverter Output Stage

Telecom 48 V Backup Power Rectifier

Use Scenario: Output rectification in double-conversion UPS inverters delivering clean 230 VAC under utility failure.

IC Role / Device Role / Timing Role: Snubber-assisted freewheeling path for IGBTs during dead-time commutation.

Use Value: Low QRR (9700 nC) and controlled IRM (≤45 A) limit snubber capacitor stress and enable 20% smaller RC networks.

Use Scenario: Input rectification in telecom backup power supplies converting -48 VDC to isolated 12 VDC for control logic.

IC Role / Device Role / Timing Role: High-reliability bridge rectifier operating continuously at 85 °C ambient with zero maintenance cycles.

Use Value: 175 °C Tj(max) and ≤300 µA IR at 125 °C ensure >15-year MTBF in sealed rack-mount enclosures.

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
IXYS MUR6012CT	TO-247 package, higher VF (1.45 V typ. at 150 °C), trr = 65 ns, Rth(j-c) = 0.35 °C/W	Requires larger heatsink area due to higher thermal resistance; less suitable for space-constrained telecom modules	Prefer when legacy TO-247 footprint compatibility is required and thermal budget allows 15% higher conduction loss.
Vishay VS-60E12	DO-247 package (not LL), lower surge rating (350 A), QRR = 11200 nC, VF = 1.35 V	Higher reverse recovery charge increases snubber losses in high-frequency DC-AC inverters	Select only for cost-sensitive industrial SMPS where 100 kHz+ operation is not required and surge margin is adequate.

Compared with MUR6012CT and VS-60E12, STTH6012WL offers superior thermal performance (0.22 °C/W min), lowest QRR among 1200 V/60 A diodes, and highest softness factor - making it optimal for high-density, high-reliability renewable energy and EV infrastructure designs.

Availability

STTH6012WL is available at Aetrix Electronics and suitable for solar inverters, EV charging stations, and industrial UPS systems requiring stable component supply with long-term manufacturing continuity and traceable sourcing.

Supply support for STTH6012WL 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.

STTH6012WL belongs to ST's high-voltage ultrafast diode product line, engineered specifically for high-efficiency, high-reliability power conversion in renewable energy, electric mobility, and mission-critical industrial infrastructure.

FAQ

What is the maximum recommended mounting torque for STTH6012WL?

The DO-247 LL package specifies a recommended torque value of 0.8 N·m and a maximum torque of 1.0 N·m. Exceeding 1.0 N·m risks mechanical damage to the epoxy body or internal bond wires, potentially degrading thermal performance or causing premature failure under thermal cycling.

Can STTH6012WL be used in parallel configurations?

Yes - its low and tightly controlled leakage current (≤300 µA at 125 °C) and matched VF characteristics across production lots enable reliable parallel operation without external ballasting resistors, provided thermal coupling to a common heatsink is uniform and layout symmetry is maintained.

How does STTH6012WL's softness factor impact EMI in high-frequency converters?

A softness factor >1.0 means peak reverse recovery current (IRM) occurs after the current zero-crossing, resulting in slower di/dt during turn-off - reducing high-frequency spectral content above 30 MHz and easing compliance with CISPR-11 Class A conducted EMI limits without oversized filters.

Is STTH6012WL suitable for use in synchronous rectification topologies?

No - STTH6012WL is a unidirectional, non-controlled rectifier diode with no gate control. It cannot replace MOSFETs in synchronous rectification; however, it serves as a robust alternative to Schottky diodes in high-voltage (>600 V) flyback or forward converters where Schottky limitations apply.

STTH6012WL Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-247-2

Packaging:: Tube

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1200 V

Current - Average Rectified (Io):: 60A

Voltage - Forward (Vf) (Max) @ If:: 2.25 V @ 60 A

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

Reverse Recovery Time (trr):: 125 ns

Current - Reverse Leakage @ Vr:: 30 µA @ 1200 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-247 LL

Operating Temperature - Junction:: 175°C

STTH6012WL FAQ

1.How can I place an order for STTH6012WL through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH6012WL 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 STTH6012WL reliable?

The price and inventory of STTH6012WL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH6012WL is usually 5 days.

3.What payment methods are accepted for STTH6012WL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH6012WL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH6012WL?

STTH6012WL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH6012WL 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 STTH6012WL?

For technical support, including STTH6012WL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH6012WL requirements.

6.How does Aetrix verify that STTH6012WL is sourced from the original manufacturer or authorized distributors?

All STTH6012WL 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 STTH6012WL meets industry standards.

7.What is the process for return or replacement of STTH6012WL?

All STTH6012WL units undergo pre-shipment inspection (PSI). If there is an issue with STTH6012WL, 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 STTH6012WL part is unused and in its original packaging.

Return procedure for STTH6012WL:

1.Submit a request within 90 days.

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

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