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STMicroelectronics STTH512B-TR
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- Part No.:
- STTH512B-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
STTH512B-TR.pdf
- Description:
- DIODE GEN PURP 1.2KV 5A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:14,269
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Product details
Overview
STTH512B-TR from STMicroelectronics is a 1200 V, 5 A ultrafast recovery silicon diode in DPAK package, optimized for high-frequency switching, low conduction loss, and soft reverse recovery. It delivers 48 ns typical reverse recovery time (trr), 1.25 V typical forward voltage at 150 °C, and operates up to 175 °C junction temperature-ideal for server power supplies and motor control freewheeling paths.
For engineers reviewing the STTH512B-TR datasheet, STTH512B-TR pinout, STTH512B-TR application, or STTH512B-TR equivalent, key selection criteria include reverse recovery softness factor (S = 2), 960 nC reverse recovery charge (Qrr), thermal resistance (Rth(j-c) = 2.5 °C/W), and ECOPACK2-compliant DPAK insulation performance.
Technical Context
This diode employs planar passivated silicon technology with controlled lifetime doping to achieve ultrafast yet soft recovery-minimizing voltage overshoot and EMI during turn-off. Its low leakage current (<5 µA at 25 °C, <30 µA at 125 °C) and stable trr across temperature support reliable operation in high-reliability industrial rectification.
The DPAK package provides 2.5 °C/W junction-to-case thermal resistance and supports surface-mount assembly with 0.32 mg unit weight. Designed for δ = 0.5 square-wave duty, it sustains 60 A repetitive peak forward current (IFRM) and 55 A non-repetitive surge (IFSM), enabling robust snubber and bootstrap functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1200 V - Withstands repetitive reverse voltage up to 1200 V without breakdown in SMPS primary-side rectification. |
| IF(AV) | 5 A - Average forward current rating at TL = 145 °C for continuous conduction mode operation. |
| trr(typ.) | 48 ns - Measured at IF = 5 A, dIF/dt = −200 A/µs, VR = 600 V; enables >100 kHz switching in PFC stages. |
| VF(typ.) | 1.25 V at Tj = 150 °C - Low forward drop reduces conduction losses in high-temperature motor drive auxiliary rails. |
| S factor | 2 - Softness ratio (tb/ta) ensures low di/dt-induced voltage spikes and reduced RFI in IGBT/MOSFET clamp circuits. |
| Qrr | 960 nC - Reverse recovery charge directly impacts switching loss in hard-switched converters; lower than standard fast diodes. |
| Rth(j-c) | 2.5 °C/W - Junction-to-case thermal resistance enables efficient PCB copper heatsinking in compact DPAK layouts. |
Pinout & Package
STTH512B-TR uses the DPAK (TO-252) surface-mount package with insulated epoxy body meeting UL 94 V0. The device has two terminals: anode and cathode, mounted on a single-sided copper pad with exposed thermal slug.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to positive rail or switch node; must handle 60 A IFRM pulses without bond wire failure. |
| Cathode (K) | Forward current exit / reverse blocking terminal | Commonly tied to ground or low-side switch; serves as heat-sink interface via exposed metal tab. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast & soft recovery | trr = 48 ns with S factor = 2 - Reduces EMI and voltage stress during IGBT turn-off in motor drives. |
| High junction temperature rating | Tj(max) = 175 °C - Enables operation in sealed enclosures or high-ambient environments without derating. |
| Low conduction loss | VF = 1.25 V @ 5 A, 150 °C - Cuts forward power dissipation by ~15% vs. legacy 1.45 V diodes at same condition. |
| ECOPACK2 compliance | Halogen-free, RoHS-compliant DPAK - Meets EU environmental directives without compromising thermal or electrical performance. |
| High reliability ruggedness | IR < 5 µA @ 25 °C, <30 µA @ 125 °C - Minimizes thermal runaway risk in parallel-connected configurations. |
Applications
| UPS DC-Link Rectification | Server Power Supply PFC Stage |
|---|---|
Use Scenario: Bidirectional AC/DC conversion in online UPS systems requiring zero-voltage switching and low standby loss. IC Role / Device Role / Timing Role: Ultrafast freewheeling diode in boost PFC converter, clamping inductive kickback during MOSFET turn-off. Use Value: 48 ns trr and soft recovery suppress output voltage ringing, reducing snubber component count and improving efficiency above 95%. | Use Scenario: High-density 1U server PSUs operating at 100–300 kHz with strict thermal budgets. IC Role / Device Role / Timing Role: Output rectifier in LLC resonant secondary side, handling 5 A average current under transient load steps. Use Value: 1.25 V VF at 150 °C lowers conduction loss by 0.25 W per diode versus standard fast diodes, easing thermal design. |
| Motor Control Bootstrap Circuit | Industrial SMPS Snubber Network |
Use Scenario: Gate driver bootstrap supply in 3-phase inverter half-bridges driving BLDC or induction motors. IC Role / Device Role / Timing Role: Charge-pump diode replenishing high-side gate driver capacitor during dead-time intervals. Use Value: Low Qrr (960 nC) minimizes charge loss per cycle, sustaining gate voltage stability at 20 kHz PWM frequencies. | Use Scenario: RC snubber across IGBT collector-emitter in variable-frequency drives and welding inverters. IC Role / Device Role / Timing Role: Transient energy clamp diode absorbing inductive flyback during IGBT turn-off. Use Value: S factor = 2 prevents abrupt current collapse, limiting dv/dt-induced false triggering and reducing snubber resistor stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH5L06D | 600 V VRRM, 5 A, trr = 35 ns, DPAK, VF = 1.25 V @ 150 °C | Limited to ≤600 V topologies; unsuitable for 1200 V DC-link or industrial rectifiers. | Select when system bus voltage is ≤650 V and faster trr is prioritized over voltage margin. |
| IXYS MUR560E | 600 V VRRM, 5 A, trr = 50 ns, TO-220AC, VF = 1.2 V @ 25 °C (1.45 V @ 150 °C) | Higher VF at elevated temperature; through-hole mounting limits board density vs. DPAK. | Prefer for legacy through-hole designs where thermal mass outweighs footprint constraints. |
Compared with STTH512B-TR, STTH5L06D trades voltage rating for marginally faster recovery but sacrifices 1200 V system compatibility, while IXYS MUR560E offers lower room-temperature VF but degrades more severely at 150 °C and lacks surface-mount scalability.
Availability
STTH512B-TR is available at Aetrix Electronics and suitable for UPS systems, server power supplies, and industrial motor control applications requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for STTH512B-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, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
The STTH series targets high-efficiency power conversion with ultrafast soft-recovery diodes engineered specifically for PFC, motor drive, and high-frequency SMPS applications demanding low EMI and thermal resilience.
FAQ
What is the maximum allowable case temperature for STTH512B-TR in continuous operation?
The maximum case temperature is not directly specified, but the device achieves Tj(max) = 175 °C with Rth(j-c) = 2.5 °C/W. For 5 A IF(AV) and 1.25 V VF at 150 °C, power dissipation is ~6.25 W; thus, case temperature must remain ≤158.75 °C to maintain safe junction margin. PCB copper area and airflow determine actual achievable Tc.
Can STTH512B-TR be used in parallel configurations?
Yes, but only with careful thermal and layout symmetry. Its low IR drift over temperature (<30 µA at 125 °C) and matched VF characteristics reduce current imbalance risk. Use identical trace lengths, equal copper pour area per device, and avoid shared thermal vias to prevent thermal runaway.
Is the DPAK package of STTH512B-TR electrically insulated?
No-the DPAK variant (STTH512B-TR) has a non-insulated tab; the cathode connects directly to the exposed metal slug. Insulation is provided only in the TO-220FPAC version (STTH512FP), rated for 2000 VRMS. DPAK requires isolation via PCB dielectric or external insulator if high-voltage standoff is needed.
How does STTH512B-TR's softness factor affect EMI in a 100 kHz PFC circuit?
A softness factor of 2 means reverse recovery current decays gradually (tb/ta = 2), suppressing high-frequency spectral components above 10 MHz. This reduces common-mode noise coupling into EMI filters and lowers conducted emissions by 5–8 dB compared to hard-recovery diodes with S < 1.2 in the same layout.
STTH512B-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1200 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 2.2 V @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 95 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
- Operating Temperature - Junction:
- 175°C (Max)
STTH512B-TR FAQ
1.How can I place an order for STTH512B-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH512B-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 STTH512B-TR reliable?
The price and inventory of STTH512B-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH512B-TR is usually 5 days.
3.What payment methods are accepted for STTH512B-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH512B-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH512B-TR?
STTH512B-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH512B-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 STTH512B-TR?
For technical support, including STTH512B-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH512B-TR requirements.
6.How does Aetrix verify that STTH512B-TR is sourced from the original manufacturer or authorized distributors?
All STTH512B-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 STTH512B-TR meets industry standards.
7.What is the process for return or replacement of STTH512B-TR?
All STTH512B-TR units undergo pre-shipment inspection (PSI). If there is an issue with STTH512B-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 STTH512B-TR part is unused and in its original packaging.
Return procedure for STTH512B-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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