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STMicroelectronics STTH1212G-TR
- Part No.:
- STTH1212G-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STTH1212G-TR.pdf
- Description:
- DIODE GEN PURP 1.2KV 12A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,723
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Product details
Overview
STTH1212G-TR from STMicroelectronics is an ultrafast recovery silicon rectifier diode in D2PAK package, rated for 1200 V repetitive peak reverse voltage, 12 A average forward current at Tc = 130 °C, and 50 ns typical reverse recovery time (trr) at IF = 1 A, dIF/dt = −100 A/µs, VR = 30 V, Tj = 25 °C. It delivers soft recovery behavior (S factor = 2), low conduction loss (VF = 1.25 V typ. at IF = 12 A, Tj = 150 °C), and operates up to 175 °C junction temperature - deployed in industrial power supply output rectification and motor drive freewheeling paths.
For engineers reviewing the STTH1212G-TR datasheet, STTH1212G-TR pinout, STTH1212G-TR application, or STTH1212G-TR equivalent, key selection criteria include verified trr ≤ 70 ns under high dIF/dt conditions, softness factor ≥ 2 for EMI control, thermal resistance Rth(j–c) = 1.6 °C/W, and D2PAK footprint compatibility with automated SMT assembly for high-reliability power conversion stages.
Technical Context
This diode employs a platinum-doped lifetime control process to achieve ultrafast, soft reverse recovery-critical for minimizing switching losses and voltage overshoot in hard-switched PFC and inverter stages. Its low IR (≤ 70 µA at Tj = 125 °C, VR = VRRM) ensures stable thermal performance under high ambient conditions.
The device is optimized for high-frequency operation (up to several hundred kHz) and pulsed current handling (IFRM = 160 A, tp = 5 µs), with forward recovery voltage (VFP) capped at 6 V and tfr ≤ 400 ns-enabling robust snubberless design in DC–DC converters and IGBT/MOSFET clamp circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1200 V - supports 800 V DC bus systems with 50 % safety margin against transient overvoltage |
| IF(AV) | 12 A at Tc = 130 °C - enables continuous conduction mode operation in 1–2 kW industrial SMPS |
| trr (typ) | 50 ns - reduces turn-off switching loss by >40 % vs. standard fast recovery diodes in 100 kHz+ topologies |
| S factor | 2 - suppresses high-frequency ringing and EMI during recovery, easing EMC filter design |
| Rth(j–c) | 1.6 °C/W - allows 30 W dissipation with ≤ 48 °C case-to-junction rise, supporting compact heatsink layouts |
| VF (typ) | 1.25 V at IF = 12 A, Tj = 150 °C - lowers conduction loss to ~15.6 W in full-wave bridge configurations |
| Tj max | 175 °C - permits operation in sealed enclosures or high-ambient environments without derating |
Pinout & Package
STTH1212G-TR uses the D2PAK (TO-263) surface-mount package with three terminals: anode, cathode, and exposed thermal pad (electrically connected to cathode). The package meets UL94 V0 flammability rating and supports lead-free reflow soldering per JEDEC JESD22-A113.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry terminal | Connected to AC input or switching node; must withstand 100 A surge (IFSM) and 1200 V blocking |
| Cathode (Pin 2) | Forward current exit / reverse voltage reference | Electrically tied to thermal pad; serves as main return path and heat sink interface |
| Thermal Pad (Bottom) | Thermal and electrical connection to cathode | Requires minimum 3.7 cm² copper area on PCB for Rth(j–a) ≤ 40 °C/W; no isolation needed |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast soft recovery | trr ≤ 70 ns with S factor ≥ 2 - eliminates need for external snubbers in 65–200 kHz converters |
| High-temperature ruggedness | Tj max = 175 °C and IR ≤ 70 µA at 125 °C - prevents thermal runaway in unventilated motor drives |
| Low VF at elevated Tj | VF = 1.25 V typ. at 150 °C - maintains efficiency >92 % in 12 A output rectifiers at full load |
| D2PAK SMT compatibility | Standardized footprint (9.15 × 10.2 mm) - supports automated placement and reflow with IPC-A-610 Class 2 reliability |
| ECOPACK® compliance | Lead-free second-level interconnect, JEDEC JESD97 marked - satisfies RoHS and ELV requirements |
Applications
| Industrial Power Supply Rectification | Motor Drive Freewheeling |
|---|---|
|
Use Scenario: Output rectification in 1.5 kW telecom and industrial SMPS operating at 100–200 kHz. IC Role / Device Role / Timing Role: Ultrafast power diode providing low-loss, low-noise DC output path with minimal reverse recovery charge (Qrr). Use Value: Reduces switching loss by 35 % vs. standard FRDs, enabling smaller heatsinks and higher power density. |
Use Scenario: Freewheeling path across IGBTs in 3-phase VFDs driving HVAC compressors and pumps. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive energy during IGBT turn-off with soft recovery to limit dv/dt stress. Use Value: Prevents IGBT overvoltage failure by limiting peak reverse recovery current (IRM ≤ 24 A) and suppressing oscillation. |
| Snubberless Flyback Converter | Bootstrap Diode in Half-Bridge Gate Drivers |
|
Use Scenario: Primary-side snubberless flyback converter in LED streetlight drivers (60–100 W). IC Role / Device Role / Timing Role: Secondary-side rectifier with ultra-low trr and soft recovery to eliminate snubber losses and simplify layout. Use Value: Enables >90 % efficiency at full load while reducing BOM count by eliminating RC snubber components. |
Use Scenario: High-side gate driver bootstrap circuit in BLDC motor controllers (24–48 V systems). IC Role / Device Role / Timing Role: Fast, low-VF charging path for bootstrap capacitor during low-side switch conduction phase. Use Value: Ensures reliable gate drive voltage (>10 V) even at 20 kHz PWM frequency due to <50 ns trr and 1.25 V VF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1212D | Same die, TO-220AC through-hole package; Rth(j–c) = 1.6 °C/W identical, but requires manual soldering and larger board area | Preferred for prototyping, low-volume industrial controls where manual assembly is acceptable | Select when thermal interface constraints favor screw-mount heatsinks or legacy board designs lack D2PAK land patterns |
| IXYS MUR1220CT | 1200 V, 12 A, trr = 65 ns (typ), VF = 1.3 V (typ); dual common-cathode configuration, TO-220AB package | Suitable for dual-output supplies or synchronous rectification auxiliary rails where dual-diode topology is required | Choose only if dual-diode integration reduces component count and board space outweighs single-diode optimization of STTH1212G-TR |
Compared with STTH1212D, the STTH1212G-TR offers SMT scalability and tighter trr consistency; versus MUR1220CT, it provides superior softness (S = 2 vs. ~1.4) and lower VF at high Tj-making it optimal for thermally constrained, high-frequency, low-EMI power stages.
Availability
STTH1212G-TR is available at Aetrix Electronics and suitable for industrial power supplies, motor drives, and LED lighting systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for STTH1212G-TR 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 automotive, industrial, and consumer markets.
STTH1212G-TR belongs to ST's high-voltage ultrafast diode product line, engineered specifically for high-efficiency, high-reliability power conversion in harsh thermal and electrical environments.
FAQ
What is the maximum allowable case temperature for continuous operation?
The STTH1212G-TR is rated for IF(AV) = 12 A at Tc = 130 °C, meaning sustained case temperatures up to 130 °C are permitted with appropriate heatsinking. Exceeding this requires linear derating per Figure 1 in the datasheet; at Tc = 100 °C, IF(AV) increases to ~14.5 A. Thermal design must maintain Tj ≤ 175 °C under worst-case load and ambient conditions.
Does the D2PAK thermal pad require electrical isolation from the PCB ground plane?
No. The D2PAK thermal pad on STTH1212G-TR is internally connected to the cathode terminal. It must be soldered directly to a copper pour tied to the cathode net-no dielectric layer or isolation is permitted. This ensures both optimal thermal transfer (Rth(j–c) = 1.6 °C/W) and correct circuit functionality.
How does soft recovery (S factor = 2) improve system-level EMI performance?
A soft recovery profile limits the rate of change of reverse current (dIR/dt), reducing high-frequency spectral content in the recovery waveform. With S = 2, the diode exhibits a gradual current tail rather than abrupt collapse, lowering radiated emissions by 6–10 dB in the 30–100 MHz band-reducing filter component size and cost in conducted EMI compliance testing.
Can STTH1212G-TR replace older STTH1212D in existing TO-220AC designs without layout changes?
No. STTH1212G-TR uses D2PAK (TO-263) packaging, which has different mechanical dimensions, pad layout, and thermal interface requirements than TO-220AC. Direct replacement requires PCB redesign to accommodate the 9.15 × 10.2 mm footprint, thermal pad solder stencil, and reflow profile adjustments-though electrical characteristics are functionally identical.
STTH1212G-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1200 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 2.2 V @ 12 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 100 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
- Operating Temperature - Junction:
- 175°C (Max)
STTH1212G-TR FAQ
1.How can I place an order for STTH1212G-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH1212G-TR 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 STTH1212G-TR reliable?
The price and inventory of STTH1212G-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH1212G-TR is usually 5 days.
3.What payment methods are accepted for STTH1212G-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH1212G-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH1212G-TR?
STTH1212G-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH1212G-TR 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 STTH1212G-TR?
For technical support, including STTH1212G-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH1212G-TR requirements.
6.How does Aetrix verify that STTH1212G-TR is sourced from the original manufacturer or authorized distributors?
All STTH1212G-TR 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 STTH1212G-TR meets industry standards.
7.What is the process for return or replacement of STTH1212G-TR?
All STTH1212G-TR units undergo pre-shipment inspection (PSI). If there is an issue with STTH1212G-TR, 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 STTH1212G-TR part is unused and in its original packaging.
Return procedure for STTH1212G-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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