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STMicroelectronics STPS8170DEE-TR
- Part No.:
- STPS8170DEE-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- 8-PowerTDFN
- Datasheet:
-
STPS8170DEE-TR.pdf
- Description:
- DIODE SCHOTTKY 170V 8A POWERFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:19,937
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Product details
Overview
STPS8170DEE-TR from STMicroelectronics is an 8 A, 170 V PowerFLAT-packaged Schottky rectifier optimized for high-frequency DC/DC converters and freewheeling paths in space-constrained power supplies. It delivers 0.66 V typical forward voltage at 8 A and 125 °C, supports 175 °C maximum junction temperature, and features 4 °C/W junction-to-case thermal resistance for efficient thermal management in battery chargers and telecom power modules.
For engineers reviewing the STPS8170DEE-TR datasheet, STPS8170DEE-TR pinout, STPS8170DEE-TR application, or STPS8170DEE-TR equivalent, key selection criteria include conduction loss modeling (P = 0.62×IF(AV) + 0.0125×IF²(RMS)), avalanche energy handling (400 W, 10 µs), reverse leakage (<15 mA at 125 °C), and PowerFLAT 3.3×3.3 mm footprint compatibility with FR4 PCB copper area optimization.
Technical Context
This Schottky rectifier operates as a unidirectional low-loss freewheeling or polarity protection device in synchronous and non-synchronous buck/boost topologies. Its negligible switching losses and extremely fast recovery eliminate reverse recovery charge (Qrr ≈ 0), enabling operation up to several MHz without snubber networks.
The device uses a planar silicon Schottky barrier structure with metal–semiconductor junction optimized for low VF and high Tj stability. Avalanche capability is fully specified (400 W, 10 µs pulse), allowing robust transient overvoltage tolerance without external clamping in DC/DC converter flyback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 8 A average forward current at Tc = 145 °C - defines continuous DC output stage rating in 12 V/48 V telecom DC/DC converters |
| VRRM | 170 V repetitive peak reverse voltage - supports 48 V input rails with 3× safety margin against transients |
| VF (typ.) | 0.66 V at IF = 8 A, Tj = 125 °C - enables <1.1 W conduction loss per diode in dual-phase 12 V output designs |
| Rth(j-c) | 4 °C/W - allows direct thermal coupling to heatsink or copper pour, critical for >10 W dissipation in compact SSD power rails |
| Tj (max.) | 175 °C - ensures reliable operation in sealed cordless appliance enclosures with limited airflow |
| IFSM | 100 A non-repetitive surge (10 ms sine) - withstands inrush during hot-plug battery charger startup |
| IR (max.) | 15 mA reverse leakage at VR = VRRM, Tj = 125 °C - minimizes standby power loss in always-on polarity protection circuits |
Pinout & Package
Package: PowerFLAT 3.3 × 3.3 mm, 2-terminal surface-mount package with exposed thermal pad (cathode-connected tab). Height ≤ 1.1 mm - designed for ultra-low-profile applications including portable SSD power stages and slimline cordless tool battery packs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to switch node (e.g., MOSFET drain) in buck converter freewheel path; requires low-inductance trace routing |
| Cathode (K) / Tab | Forward current exit & thermal interface | Electrically and thermally connected to PCB ground plane or dedicated thermal pad; must be soldered with ≥80% coverage for Rth(j-c) compliance |
Key Features
| Feature | Design Value |
|---|---|
| Very low conduction losses | 0.66 V VF at 8 A/125 °C enables <1.1 W loss in 12 V/5 A output stage - reduces thermal derating by ≥25% vs. standard Schottkys |
| Extremely fast switching | Zero Qrr and sub-ns reverse recovery eliminates switching loss and EMI in >500 kHz DC/DC converters |
| Low thermal resistance | 4 °C/W Rth(j-c) permits direct mounting to 2 cm² copper pour on 35 µm FR4 - achieves ΔTj-a < 40 °C at 8 W dissipation |
| Avalanche capacity specified | 400 W repetitive avalanche power (10 µs pulse) - sustains inductive kickback in motor driver freewheel paths without failure |
| ECOPACK2 compliant | Meets RoHS, halogen-free, and REACH requirements - qualified for consumer and industrial end-equipment CE/FCC certification |
Applications
| Battery Charger Output Stage | Telecom DC/DC Converter Freewheel |
|---|---|
Use Scenario: Secondary-side rectification in 24 V/3 A offline battery charger for cordless power tools. IC Role / Device Role / Timing Role: Freewheeling diode in non-synchronous flyback topology, conducting during MOSFET off-time. Use Value: 0.66 V VF reduces conduction loss by 320 mW vs. 0.98 V alternative, lowering thermal stress in sealed plastic housing. | Use Scenario: Output rectification in 48 V input, 12 V/10 A isolated DC/DC module for telecom base station power shelf. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in secondary-side buck-derived topology with 300 kHz switching. Use Value: Zero Qrr eliminates reverse recovery loss and associated gate drive noise, improving efficiency by 0.8% at full load. |
| SSD Power Rail Polarity Protection | Cordless Appliance Inverter Freewheel |
Use Scenario: Reverse-polarity protection for 5 V/3 A NVMe SSD power input with space limit < 3.5 mm height. IC Role / Device Role / Timing Role: Low-VF series blocking diode preventing damage from accidental reversed USB-C adapter connection. Use Value: 0.66 V drop limits voltage loss to <2% at 3 A - preserves 4.9 V minimum rail for PCIe Gen4 controller operation. | Use Scenario: Freewheel path in 18 V BLDC inverter half-bridge driving cordless vacuum motor. IC Role / Device Role / Timing Role: Clamp diode across low-side MOSFET, conducting during PWM dead-time and inductive flyback. Use Value: 175 °C Tj rating and 100 A IFSM ensure survival during stall-current events without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-8EWH06FN-M3/45 | Same 8 A/170 V rating but TO-252 (DPAK) package; Rth(j-c) = 5.5 °C/W; VF = 0.72 V @ 8 A/125 °C | Requires larger PCB area (6.7 × 6.2 mm vs. 3.3 × 3.3 mm); less suitable for ultra-thin SSD or cordless tool modules | Select when legacy DPAK layout exists and thermal margin >15 °C is available |
| ON Semiconductor SB8170 | Identical PowerFLAT 3.3×3.3 mm package; VF = 0.69 V @ 8 A/125 °C; Tj(max) = 150 °C; no avalanche rating specified | Lacks 400 W avalanche capability - not recommended for inductive freewheeling in motor inverters | Select only for low-energy polarity protection or DC/DC freewheel where avalanche stress is absent |
Compared with VS-8EWH06FN-M3/45 and SB8170, STPS8170DEE-TR uniquely combines ultra-compact PowerFLAT packaging, lowest VF at high temperature, and fully rated avalanche capability - making it optimal for space- and reliability-critical 48 V telecom and cordless power systems.
Availability
STPS8170DEE-TR is available at Aetrix Electronics and suitable for battery chargers, telecom DC/DC converters, and cordless appliance inverters requiring stable component supply with consistent PowerFLAT 3.3×3.3 mm footprint and ECOPACK2 compliance.
Supply support for STPS8170DEE-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 industrial, automotive, and consumer markets.
STPS8170DEE-TR belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-density power conversion in space-constrained applications where low VF, fast switching, and thermal robustness are mandatory.
FAQ
What is the maximum allowable PCB copper area for optimal thermal performance?
The datasheet specifies that a 2 cm² copper surface (35 µm thickness, FR4 board) achieves Rth(j-a) ≈ 50 °C/W. For Rth(j-c) = 4 °C/W compliance, the cathode tab must be soldered to ≥80% of the recommended 3.3×3.3 mm footprint with no solder mask over the thermal pad. Larger copper pours improve ambient thermal resistance but do not affect junction-to-case spec.
Does STPS8170DEE-TR support synchronous rectification control?
No - STPS8170DEE-TR is a passive Schottky rectifier with fixed anode/cathode terminals and no gate or control interface. It functions as a freewheeling or polarity protection diode only. For synchronous rectification, discrete MOSFETs or integrated SR controllers (e.g., STSR3) must be used in conjunction with this device.
Can this diode replace a 200 V Schottky in a 48 V system?
Yes - with 170 V VRRM, STPS8170DEE-TR provides 3.5× overvoltage margin against 48 V nominal input transients (e.g., ISO 7637-2 Pulse 1/2b). Its 100 A IFSM also exceeds typical 48 V system surge requirements. However, verify peak reverse voltage under worst-case fault conditions before final design sign-off.
Is the PowerFLAT 3.3×3.3 mm package lead-free and RoHS-compliant?
Yes - STPS8170DEE-TR carries ECOPACK2 certification, confirming full compliance with RoHS Directive 2011/65/EU, halogen-free materials (IEC 61249-2-21), and REACH SVHC thresholds. The matte tin finish on terminals meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life at ≤30 °C/60% RH.
STPS8170DEE-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-PowerTDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 170 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 15 µA @ 170 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerFlat™ (3.3x3.3)
- Operating Temperature - Junction:
- 175°C (Max)
STPS8170DEE-TR FAQ
1.How can I place an order for STPS8170DEE-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS8170DEE-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 STPS8170DEE-TR reliable?
The price and inventory of STPS8170DEE-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS8170DEE-TR is usually 5 days.
3.What payment methods are accepted for STPS8170DEE-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS8170DEE-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS8170DEE-TR?
STPS8170DEE-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS8170DEE-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 STPS8170DEE-TR?
For technical support, including STPS8170DEE-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS8170DEE-TR requirements.
6.How does Aetrix verify that STPS8170DEE-TR is sourced from the original manufacturer or authorized distributors?
All STPS8170DEE-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 STPS8170DEE-TR meets industry standards.
7.What is the process for return or replacement of STPS8170DEE-TR?
All STPS8170DEE-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS8170DEE-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 STPS8170DEE-TR part is unused and in its original packaging.
Return procedure for STPS8170DEE-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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