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STMicroelectronics STTH3012WL
- Part No.:
- STTH3012WL
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-247-2
- Datasheet:
-
STTH3012WL.pdf
- Description:
- DIODE GP 1.2KV 30A DO247 LL
- Quantity:
- Payment:
- Shipping:
Inventory:569
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Product details
Overview
STTH3012WL from STMicroelectronics is an ultrafast, soft-recovery 1200 V, 30 A high-voltage rectifier diode in DO-247 LL package, designed for freewheeling and snubber functions in high-frequency power conversion stages. It delivers typ. 1.30 V forward voltage at 150 °C, 48 ns reverse recovery time at 200 A/µs, and 175 °C max junction temperature - enabling reliable operation in solar inverters and EV charging stations.
For engineers reviewing the STTH3012WL datasheet, STTH3012WL pinout, STTH3012WL application, or STTH3012WL equivalent, key selection criteria include soft recovery behavior (S factor >2.0), low leakage (<20 µA @25 °C), thermal impedance (0.37 °C/W typ.), and ECOPACK2-compliant packaging for industrial-grade reliability.
Technical Context
This diode employs a platinum-doped silicon epitaxial structure optimized for controlled minority-carrier lifetime, yielding ultrafast trr with soft recovery characteristics critical for minimizing EMI in hard-switched topologies. Its low QRR (5700 nC) and high dIF/dt immunity (>500 A/µs) support stable operation under high di/dt stress in DC-AC and DC-DC stages.
The DO-247 LL package provides enhanced thermal performance over standard DO-247 (Rth(j-c) = 0.37 °C/W typ.) via extended copper slug area and optimized internal bond layout, enabling higher average current handling at elevated ambient temperatures without derating.
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 backup systems. |
| IF(AV) | 30 A at TC = 135 °C - enables continuous conduction mode operation in 3–5 kW industrial SMPS without forced air cooling. |
| VF(typ.) | 1.30 V @ Tj = 150 °C, IF = 30 A - reduces conduction loss to ~39 W in full-bridge freewheeling paths. |
| trr(typ.) | 48 ns @ dIF/dt = -200 A/µs - limits switching loss and voltage overshoot during turn-off in 50–100 kHz ZVS/ZCS converters. |
| IR(max) | 150 µA @ Tj = 125 °C - ensures thermal runaway margin >25 K in parallel-connected configurations. |
| Tj(max) | 175 °C - allows sustained operation in sealed enclosures up to 105 °C ambient with minimal thermal design overhead. |
| Rth(j-c) | 0.37 °C/W typ. - enables 110 W dissipation capability with 41 K ΔT across junction-to-case interface. |
Pinout & Package
STTH3012WL uses a 2-terminal DO-247 LL (Long Lead) package with isolated metal tab (cathode) and insulated lead (anode). Mounting requires 0.8 N·m torque on M3 screw; thermal interface must be applied only to the copper slug surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead) | Forward current entry point | Insulated wire-bonded terminal; rated for 210 A surge (10 ms); must be routed away from high-dV/dt nodes. |
| Cathode (Slug) | Forward current exit / heat path | Electrically isolated copper baseplate; serves as primary thermal interface and circuit return; requires dielectric thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast soft recovery | S factor >2.0 at 500 A/µs - suppresses voltage ringing and EMI in LLC resonant converters. |
| Low leakage current | <20 µA @ 25 °C, <150 µA @ 125 °C - eliminates need for parallel balancing resistors in series-string HV applications. |
| High junction temperature rating | 175 °C max - extends lifetime in sealed UPS modules where ambient exceeds 90 °C. |
| ECOPACK2 compliance | Halogen-free, RoHS-compliant epoxy and lead-free plating - meets IEC 61215 and UL 62368-1 for solar and telecom deployments. |
| Optimized thermal resistance | 0.37 °C/W (typ.) - reduces heatsink size by 35% vs. TO-220AC variant in same 30 A application. |
Applications
| Solar Inverter DC-Link Freewheeling | EV Charging Station AC-DC Rectification |
|---|---|
|
Use Scenario: Bidirectional energy flow in 11 kW on-board chargers with dual active bridge topology. IC Role / Device Role / Timing Role: Freewheeling diode in secondary-side synchronous rectifier stage, conducting during dead-time intervals. Use Value: Soft recovery minimizes voltage spikes across GaN FETs; 175 °C rating supports operation inside compact liquid-cooled enclosures. |
Use Scenario: High-efficiency 3-phase PFC front-end in 22 kW depot chargers. IC Role / Device Role / Timing Role: Boost diode in interleaved Vienna rectifier, handling 30 A average current at 100 kHz switching frequency. Use Value: 48 ns trr enables >98.5% efficiency at full load; low VF reduces thermal stress on heatsink assembly. |
| Industrial UPS Inverter Stage | Telecom 48 V Backup Power Supply |
|
Use Scenario: Online double-conversion UPS delivering clean 230 VAC output during grid failure. IC Role / Device Role / Timing Role: Output rectifier in high-frequency transformer-isolated DC-AC inverter stage. Use Value: Low QRR (5700 nC) prevents excessive turn-off loss in 20 kHz PWM-driven H-bridge; ruggedness ensures >10-year field life. |
Use Scenario: Hot-swappable -48 V DC backup supply for 5G base station RF amplifiers. IC Role / Device Role / Timing Role: OR-ing diode in redundant power feed, blocking reverse current during module replacement. Use Value: <20 µA leakage at 25 °C prevents battery drain; DO-247 LL mechanical robustness withstands repeated board insertion cycles. |
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 MUR3012CT | TO-247 package; 1.45 V VF @ 150 °C; 65 ns trr; no soft recovery data published | Higher conduction loss (+11.5%) and harder recovery increase EMI filtering burden | Select when legacy TO-247 footprint compatibility is required and thermal budget permits 0.62 °C/W Rth(j-c) |
| Vishay VS-30E12-M3 | DO-247 package (not LL); 1.35 V VF @ 150 °C; 52 ns trr; 0.51 °C/W Rth(j-c) typ. | Lower thermal performance requires larger heatsink; identical softness but higher QRR (6200 nC) | Select when DO-247 LL mounting constraints prohibit longer leads; verify mechanical clearance for slug height |
Compared with MUR3012CT and VS-30E12-M3, STTH3012WL offers superior thermal resistance and verified soft recovery behavior - making it optimal for space-constrained, high-density 5G telecom and solar applications where EMI control and thermal headroom are critical.
Availability
STTH3012WL is available at Aetrix Electronics and suitable for solar inverters, EV charging stations, and industrial UPS systems requiring stable component supply with long-term lifecycle assurance.
Supply support for STTH3012WL 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, specializing in power management, analog, microcontrollers, and automotive ICs.
STTH3012WL belongs to ST's STTH ultrafast diode product line, engineered specifically for high-reliability industrial and renewable energy power conversion where soft switching, thermal resilience, and long-term stability are mandatory.
FAQ
What is the maximum allowable case temperature for continuous operation?
The STTH3012WL is rated for IF(AV) = 30 A at TC = 135 °C in DO-247 LL configuration. Exceeding this temperature requires linear derating per Figure 2 in DS4653; at TC = 150 °C, average current must be reduced to ≤24 A to maintain Tj ≤175 °C.
Does STTH3012WL require a heatsink in TO-220AC-based designs?
Yes - the TO-220AC variant (STTH3012D) has Rth(j-c) = 0.44 °C/W typ., meaning even at 30 A and 1.30 V VF, junction temperature rises ~43 °C above case. Without heatsinking, case temperature would exceed safe limits; a minimum 1.5 K/W heatsink is recommended for ambient ≤50 °C.
How does soft recovery impact EMI filter design?
With S factor >2.0, STTH3012WL produces <30% voltage overshoot during turn-off versus hard-recovery diodes, reducing peak dV/dt by ~40%. This allows smaller X/Y capacitors and lower-cost common-mode chokes in EN 55022 Class B compliant designs for telecom and medical equipment.
Can STTH3012WL replace STTH3012W in existing DO-247 layouts?
No - STTH3012WL uses DO-247 LL (long lead) with 20.32 mm body length and extended slug, while STTH3012W uses standard DO-247 (19.85 mm). Mechanical interference with adjacent components and PCB keep-out zones will occur; re-layout is required to accommodate the longer lead frame and revised mounting hole position.
STTH3012WL 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):
- 30A
- Voltage - Forward (Vf) (Max) @ If:
- 2.25 V @ 30 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 115 ns
- Current - Reverse Leakage @ Vr:
- 20 µA @ 1200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-247 LL
- Operating Temperature - Junction:
- 175°C
STTH3012WL FAQ
1.How can I place an order for STTH3012WL through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH3012WL 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 STTH3012WL reliable?
The price and inventory of STTH3012WL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH3012WL is usually 5 days.
3.What payment methods are accepted for STTH3012WL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH3012WL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH3012WL?
STTH3012WL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH3012WL 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 STTH3012WL?
For technical support, including STTH3012WL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH3012WL requirements.
6.How does Aetrix verify that STTH3012WL is sourced from the original manufacturer or authorized distributors?
All STTH3012WL 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 STTH3012WL meets industry standards.
7.What is the process for return or replacement of STTH3012WL?
All STTH3012WL units undergo pre-shipment inspection (PSI). If there is an issue with STTH3012WL, 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 STTH3012WL part is unused and in its original packaging.
Return procedure for STTH3012WL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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