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

STMicroelectronics STTH1512G

Name: STTH1512G
Brand: STMicroelectronics
SKU: STTH1512G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH1512G

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: STTH1512G.pdf

Description:: DIODE GEN PURP 1.2KV 15A D2PAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STTH1512G from STMicroelectronics is a 1200 V, 15 A ultrafast recovery diode in D2PAK (TO-263) package, featuring soft reverse recovery (trr = 53 ns typ. at 125 °C), low forward voltage (VF = 1.20 V typ. at 150 °C), and high junction temperature rating (Tj = 175 °C). It serves as a primary rectifier or freewheeling diode in industrial switch-mode power supplies and motor drive inverters.

For engineers reviewing the STTH1512G datasheet, STTH1512G pinout, STTH1512G application, or STTH1512G equivalent, key selection criteria include reverse recovery softness (S = 1.5), thermal resistance (Rth(j-c) = 1.3 °C/W), insulation capability (not applicable - non-insulated D2PAK), and suitability for high-frequency hard-switching topologies with dIF/dt up to 500 A/µs.

Technical Context

This diode employs platinum-doped silicon to achieve tightly controlled carrier lifetime, enabling ultrafast yet soft recovery with minimal voltage overshoot and EMI generation. Its dynamic performance is characterized under high-stress conditions: trr and IRM are specified at VR = 600 V, Tj = 125 °C, and dIF/dt = −200 A/µs.

The D2PAK package provides robust thermal conduction (Rth(j-c) = 1.3 °C/W) and mechanical reliability for surface-mount power conversion stages. Unlike insulated variants (e.g., DOP3I), STTH1512G requires external isolation if system-level creepage/clearance mandates >2500 V rms insulation.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	1200 V - supports DC bus voltages up to 800 V in three-phase rectifiers with 50 % safety margin.
IF(AV)	15 A at TC = 130 °C - enables continuous conduction mode operation in 1–2 kW industrial SMPS without forced air cooling.
trr (typ)	53 ns at Tj = 125 °C - reduces switching loss and di/dt-induced gate noise in IGBT-based motor drives.
VF (typ)	1.20 V at IF = 15 A, Tj = 150 °C - lowers conduction loss to ~18 W at full load, improving efficiency over legacy 1.5 V diodes.
S factor	1.5 at Tj = 125 °C - suppresses voltage ringing during turn-off, easing EMI filter design and reducing snubber losses.
Rth(j-c)	1.3 °C/W - allows junction-to-case temperature rise of ≤19.5 °C at 15 A average current, supporting compact heatsink layouts.
IRM (max)	28 A at Tj = 125 °C - defines peak reverse recovery current stress on upstream switches during commutation.

Pinout & Package

D2PAK (TO-263) package: surface-mount, single-die construction with exposed copper thermal pad (pin 2), molded epoxy body (UL94 V0), and lead-free finish per ECOPACK® specifications.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Forward current entry	Connected to AC input or switching node; must handle 200 A surge (IFSM) and high dIF/dt transients.
Pin 2 (Cathode / Thermal Pad)	Forward current exit & thermal path	Electrically tied to cathode; soldered directly to PCB copper pour for low-impedance heat dissipation.

Key Features

Feature	Design Value
Ultrafast soft recovery	trr = 53 ns with S = 1.5 ensures minimal voltage overshoot and reduced RFI in hard-switched converters.
High-temperature operation	Tj(max) = 175 °C enables reliable use in enclosed industrial enclosures without derating at ambient up to 85 °C.
Low leakage current	IR ≤ 100 µA at Tj = 125 °C minimizes thermal runaway risk in parallel configurations.
Optimized for high dIF/dt	Validated up to 500 A/µs - suitable for fast IGBT and SiC MOSFET switching nodes without added snubbers.
ECOPACK® compliance	Lead-free, RoHS-compliant, halogen-free packaging meeting industrial environmental requirements.

Applications

Industrial SMPS Rectification

Motor Drive Freewheeling

Use Scenario: Three-phase PFC front-end and output rectification in 1.5 kW telecom and server PSUs.

IC Role / Device Role / Timing Role: Main output rectifier handling 15 A DC current with 100 kHz switching frequency.

Use Value: 1.20 V VF at 150 °C reduces conduction loss by 0.45 W vs. standard 1.35 V diodes, improving full-load efficiency by 0.3 %.

Use Scenario: Anti-parallel freewheeling path across IGBTs in 3-phase inverter legs for HVAC compressors.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation during IGBT turn-off, absorbing inductive energy.

Use Value: Soft recovery (S = 1.5) limits VCE spike on IGBTs, allowing 10 % reduction in snubber capacitor size.

Snubber Network Diode

Bootstrap Circuit Diode

Use Scenario: Clamp diode in RCD snubber across flyback transformer primary in industrial auxiliary supplies.

IC Role / Device Role / Timing Role: Conducts transient energy pulse during MOSFET turn-off, then blocks 1200 V reset voltage.

Use Value: 1200 V VRRM and 200 A IFSM withstand repeated 10 ms surges without degradation.

Use Scenario: High-side gate driver bootstrap diode in half-bridge motor controllers using N-channel MOSFETs.

IC Role / Device Role / Timing Role: Charges bootstrap capacitor during low-side conduction; blocks 600 V high-side rail during switching.

Use Value: Low VF (1.20 V) maximizes bootstrap voltage margin; fast trr prevents charge loss during short dead-times.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IXYS MUR1512CT	15 A / 1200 V dual common-cathode TO-220AB; trr = 60 ns (25 °C), VF = 1.25 V (125 °C); no softness spec.	Requires dual-diode layout; higher trr increases EMI in high-dIF/dt circuits; lacks soft recovery data.	Prefer when dual configuration simplifies board layout and soft recovery is not critical.
Vishay VS-15EWH12	15 A / 1200 V D2PAK; trr = 75 ns (25 °C), VF = 1.30 V (125 °C); S factor not published.	Higher VF increases conduction loss by ~0.15 W at 15 A; slower recovery raises snubber demand.	Acceptable where cost sensitivity outweighs efficiency and EMI targets.

Compared with MUR1512CT and VS-15EWH12, STTH1512G delivers superior softness (S = 1.5) and lower VF at elevated temperature-critical for thermally constrained industrial inverters-while maintaining identical D2PAK footprint and thermal performance.

Availability

STTH1512G is available at Aetrix Electronics and suitable for industrial power supplies, motor control inverters, and snubber networks requiring stable component supply across multi-year production cycles.

Supply support for STTH1512G 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, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

STTH1512G belongs to ST's high-voltage ultrafast diode product line, engineered specifically for efficiency-critical rectification and freewheeling in industrial motor drives and switch-mode power supplies operating above 600 V DC bus.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STTH1512G is rated for IF(AV) = 15 A at TC = 130 °C, meaning the case (tab) temperature must not exceed 130 °C under steady-state conditions. Exceeding this limit requires current derating per the thermal curve in Figure 1 of the datasheet (Doc ID 12157 Rev 2), with Tj capped at 175 °C.

Is STTH1512G suitable for paralleling multiple units?

Yes-its low and tightly controlled reverse leakage current (≤100 µA at 125 °C) and matched VF characteristics enable stable current sharing when paralleled with external ballast resistors. However, layout symmetry and thermal coupling must be maintained to avoid thermal runaway.

Does STTH1512G have internal thermal protection?

No. STTH1512G is a passive discrete diode with no integrated thermal shutdown or sensing. System-level thermal monitoring (e.g., PCB thermistor near the thermal pad) is required to prevent junction overheating beyond 175 °C.

Can STTH1512G replace STTH1512D in a TO-220AC design?

Only with PCB redesign: STTH1512G uses D2PAK (surface-mount), while STTH1512D uses TO-220AC (through-hole). Pinout differs (D2PAK has 2 pins; TO-220AC has 2 leads + metal tab), and thermal interface requirements differ-D2PAK relies on soldered thermal pad, TO-220AC on mechanical mounting torque (0.4–0.6 N·m).

STTH1512G Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tube

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 15A

Voltage - Forward (Vf) (Max) @ If:: 2.1 V @ 15 A

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

Reverse Recovery Time (trr):: 105 ns

Current - Reverse Leakage @ Vr:: 15 µA @ 1200 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

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

STTH1512G FAQ

1.How can I place an order for STTH1512G through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH1512G 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 STTH1512G reliable?

The price and inventory of STTH1512G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH1512G is usually 5 days.

3.What payment methods are accepted for STTH1512G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH1512G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH1512G?

STTH1512G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH1512G 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 STTH1512G?

For technical support, including STTH1512G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH1512G requirements.

6.How does Aetrix verify that STTH1512G is sourced from the original manufacturer or authorized distributors?

All STTH1512G 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 STTH1512G meets industry standards.

7.What is the process for return or replacement of STTH1512G?

All STTH1512G units undergo pre-shipment inspection (PSI). If there is an issue with STTH1512G, 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 STTH1512G part is unused and in its original packaging.

Return procedure for STTH1512G:

1.Submit a request within 90 days.

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

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