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STMicroelectronics STTH1003SBY-TR
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- Part No.:
- STTH1003SBY-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
STTH1003SBY-TR.pdf
- Description:
- DIODE GEN PURP 300V 10A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:7,305
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Product details
Overview
STTH1003SBY-TR from STMicroelectronics is an AEC-Q101-qualified ultrafast recovery power rectifier in DPAK (TO-252) package, rated for 300 V repetitive peak reverse voltage, 10 A average forward current, and 13 ns maximum reverse recovery time. It delivers low conduction loss (VF typ. 0.9 V at 125 °C, 10 A) and high surge capability (100 A non-repetitive), optimized for energy recovery and clamping in automotive DC/DC converters.
For engineers reviewing the STTH1003SBY-TR datasheet, STTH1003SBY-TR pinout, STTH1003SBY-TR application, or STTH1003SBY-TR equivalent, key selection criteria include junction-to-case thermal resistance (4 °C/W), softness factor (0.3), reverse leakage (<100 µA at 125 °C), forward recovery voltage (2.5–3.5 V), and AEC-Q101 qualification for under-hood reliability.
Technical Context
This diode employs a planar epitaxial silicon structure engineered for ultrafast switching with controlled soft recovery-critical to minimize EMI and voltage overshoot during turn-off in high-frequency automotive power stages. Its 13 ns trr (at 25 °C, IF = 0.5 A) and 0.3 softness factor ensure low ringing and reduced snubber stress in synchronous rectification and flyback clamp circuits.
The device operates up to 175 °C junction temperature and features low thermal resistance (Rth(j-c) = 4 °C/W), enabling high-power density designs without forced cooling. Its 300 V VRRM and 100 A IFSM rating support robust operation in transient-heavy battery management and reverse polarity protection systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - Withstands 300 V repetitive reverse voltage, suitable for 24 V and 48 V automotive bus clamping and DC/DC isolation. |
| IF(AV) | 10 A - Sustains 10 A average forward current at TC = 150 °C, enabling compact heatsink design in high-duty-cycle converters. |
| trr (max) | 13 ns - Ultrafast recovery minimizes switching losses and EMI generation in >100 kHz switching topologies. |
| VF (typ) | 0.9 V @ 125 °C, 10 A - Low forward drop reduces conduction loss, improving efficiency in battery-fed systems. |
| IR (max) | 100 µA @ 125 °C - Low leakage preserves system standby power budget in always-on vehicle modules. |
| Rth(j-c) | 4 °C/W - Enables direct mounting to PCB copper pour or heatsink for thermal management without thermal interface material. |
| S-factor | 0.3 - Soft recovery behavior suppresses voltage spikes and reduces stress on MOSFETs in synchronous rectifiers. |
Pinout & Package
DPAK (TO-252) surface-mount package with exposed cathode tab for thermal and electrical connection. Three terminals: Anode (pin 1), Cathode (tab/pin 2), and no third functional terminal - standard 3-pin DPAK configuration where cathode connects to the large metal tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to input/high-side node in reverse-battery protection or energy recovery path. |
| Cathode (Tab/Pin 2) | Forward current exit & thermal path | Electrically and thermally ties to PCB ground plane or heatsink; carries full load current and dissipates heat. |
| Pin 3 (NC) | No internal connection | Mechanical support only; must remain unconnected per datasheet - not used for signal or biasing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock per JESD47. |
| Ultrafast recovery (13 ns) | Enables >200 kHz switching in DC/DC converters while maintaining low EMI and minimal snubber requirements. |
| High Tj(max) = 175 °C | Supports placement near hot components (e.g., power MOSFETs, inductors) without derating in engine control units. |
| Low VF and IR trade-off | Optimized doping profile balances conduction loss (0.9 V) and leakage (<100 µA), critical for battery longevity. |
| ECOPACK2 compliance | Halogen-free, RoHS-compliant construction meets automotive environmental standards and end-of-life recycling requirements. |
Applications
| DC/DC Converter Energy Recovery | Reverse Battery Protection |
|---|---|
Use Scenario: High-frequency isolated DC/DC converter in 48 V mild-hybrid architecture recovering inductive energy during switch-off. IC Role / Device Role / Timing Role: Ultrafast freewheeling/clamp diode in active clamp flyback or resonant LLC secondary side. Use Value: 13 ns trr and 0.3 softness factor reduce voltage overshoot by >35% versus standard fast recovery diodes, lowering MOSFET VDS stress. | Use Scenario: Input protection circuit preventing damage when jumper cables are incorrectly connected to vehicle battery terminals. IC Role / Device Role / Timing Role: Series-connected high-current blocking diode placed between battery and main power rail. Use Value: 100 A IFSM withstands jump-start surges; 10 A IF(AV) supports continuous 500 W load delivery without thermal runaway. |
| Battery Management System Clamping | Audio Amplifier Power Supply |
Use Scenario: Clamp function in regenerative braking energy feedback path within BMS cell balancing or pack-level converters. IC Role / Device Role / Timing Role: Transient voltage clamp across inductive storage elements during rapid charge/discharge transitions. Use Value: 300 V VRRM and 175 °C Tj(max) ensure reliable operation during 12 V–48 V pack transients and under-hood ambient extremes. | Use Scenario: Output rectification in Class-D amplifier power supply with high ripple current demands. IC Role / Device Role / Timing Role: Secondary-side output rectifier handling pulsed 20 A peak currents at >500 kHz PWM frequencies. Use Value: Low VF(0.9 V) reduces audible noise from supply ripple; 4 °C/W Rth(j-c) prevents thermal throttling during sustained bass output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast power rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1003S-Y | Same die, identical specs; differs only in packaging (tube vs. tape-and-reel) and marking. | No functional difference; STTH1003SBY-TR is reel-packaged for automated assembly; STTH1003S-Y is tube-packaged for prototyping. | Select STTH1003SBY-TR for SMT production; STTH1003S-Y for bench evaluation or low-volume builds. |
| IXYS MUR1030CT | Higher VF (1.25 V typ. @ 125 °C), longer trr (35 ns), TO-220AB package, no AEC-Q101 qualification. | Lacks automotive qualification and thermal performance; suited for industrial AC/DC, not under-hood use. | Use only in non-automotive, lower-frequency (<100 kHz), non-temperature-critical applications. |
Compared with STTH1003S-Y (same die, different packaging) and MUR1030CT (higher VF, slower trr, no AEC-Q101), STTH1003SBY-TR uniquely combines automotive qualification, ultrafast recovery, and DPAK thermal efficiency-making it the sole choice for AEC-compliant, high-frequency automotive power conversion.
Availability
STTH1003SBY-TR is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and battery management system clamping functions requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for STTH1003SBY-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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.
This diode belongs to ST's STTH ultrafast rectifier product line, engineered specifically for high-efficiency, high-reliability energy recovery and clamping in automotive power systems operating up to 175 °C.
FAQ
Is STTH1003SBY-TR pin-compatible with STTH1003S-Y?
Yes - both share identical DPAK (TO-252) pinout: Anode (pin 1), Cathode (tab/pin 2), and NC (pin 3). The only differences are packaging (tape-and-reel vs. tube) and top-side marking ("TH10 03SBY" vs. "TH1003S-Y"). No PCB layout change is required for substitution.
What is the maximum recommended PCB copper area for thermal performance?
Per Figure 8 in DS8767, a 50 cm² copper pour (35 µm thick) reduces Rth(j-a) to ~12 °C/W. For optimal thermal performance, ST recommends ≥40 cm² of inner/outer layer copper connected to the cathode tab via ≥6 thermal vias (0.3 mm diameter, 0.8 mm pitch).
Does STTH1003SBY-TR require a gate resistor or snubber network?
No - as a diode, it has no gate. However, due to its ultrafast recovery, a small RC snubber (e.g., 100 Ω + 100 pF) across anode–cathode is recommended in high-dI/dt (>200 A/µs) applications to suppress ringing caused by parasitic inductance in the layout.
Can STTH1003SBY-TR be used in non-automotive applications?
Yes - its 300 V/10 A rating, 13 ns trr, and 175 °C operation make it suitable for industrial SMPS, solar microinverters, and telecom power supplies. However, AEC-Q101 qualification adds cost; for non-automotive use, STTH1003S-Y (same die, tube-packaged) may offer better value.
STTH1003SBY-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):
- 300 V
- Current - Average Rectified (Io):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 300 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
- Operating Temperature - Junction:
- -40°C ~ 175°C
STTH1003SBY-TR FAQ
1.How can I place an order for STTH1003SBY-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH1003SBY-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 STTH1003SBY-TR reliable?
The price and inventory of STTH1003SBY-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH1003SBY-TR is usually 5 days.
3.What payment methods are accepted for STTH1003SBY-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH1003SBY-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH1003SBY-TR?
STTH1003SBY-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH1003SBY-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 STTH1003SBY-TR?
For technical support, including STTH1003SBY-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH1003SBY-TR requirements.
6.How does Aetrix verify that STTH1003SBY-TR is sourced from the original manufacturer or authorized distributors?
All STTH1003SBY-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 STTH1003SBY-TR meets industry standards.
7.What is the process for return or replacement of STTH1003SBY-TR?
All STTH1003SBY-TR units undergo pre-shipment inspection (PSI). If there is an issue with STTH1003SBY-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 STTH1003SBY-TR part is unused and in its original packaging.
Return procedure for STTH1003SBY-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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