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STMicroelectronics STPS40170CG
- Part No.:
- STPS40170CG
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STPS40170CG.pdf
- Description:
- DIODE ARRAY SCHOT 170V 20A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:8,615
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Product details
Overview
STPS40170CG from STMicroelectronics is a dual-center-tab Schottky rectifier in D²PAK package, rated for 170 V repetitive peak reverse voltage and 2 × 20 A average forward current per diode at Tc = 150 °C, with typical forward voltage drop of 0.69 V at 125 °C and 20 A - optimized for high-frequency SMPS and telecom DC/DC converters.
For engineers reviewing the STPS40170CG datasheet, STPS40170CG pinout, STPS40170CG application, or STPS40170CG equivalent, this dual Schottky rectifier offers low thermal resistance (Rth(j-c) = 0.85 °C/W total), high junction temperature capability (Tj = 175 °C), and ECOPACK®2 compliance - critical for reliable power conversion in space-constrained industrial and telecom power supplies.
Technical Context
This dual Schottky rectifier integrates two independent anode-cathode junctions sharing a common cathode tab, enabling synchronous or interleaved operation in bridge or center-tap topologies. Its low VF and low IR trade-off is validated across 25–125 °C, with avalanche-rated PARM = 1015 W at tp = 10 µs.
The device leverages planar Schottky barrier technology with metal-silicon interface engineered for stable conduction under high di/dt, supported by low junction-to-case thermal resistance (1.20 °C/W per diode) and coupling resistance (0.50 °C/W) enabling accurate thermal modeling when both diodes operate simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 170 V - supports input stages up to 120 VAC rectified or 48 V telecom bus with margin against transients |
| IF(AV) per diode | 20 A at Tc = 150 °C - enables 40 A total device output in dual-parallel configuration with heatsink |
| VF (typ.) | 0.69 V at 20 A, 125 °C - reduces conduction loss to ~13.8 W per diode vs. silicon diodes (>1.1 V) |
| Rth(j-c) total | 0.85 °C/W - allows >45 W dissipation before reaching 175 °C junction limit with standard heatsink mounting |
| IR (max) | 30 mA at 125 °C, VR = VRRM - limits standby leakage in offline PSUs without compromising efficiency |
| Tj max | 175 °C - permits operation in sealed enclosures or high-ambient environments without derating |
| ECOPACK®2 | Compliant - meets RoHS, halogen-free, and lead-free soldering requirements for industrial and telecom markets |
Pinout & Package
D²PAK (TO-263) package: surface-mount, single-side heat transfer via exposed copper tab (cathode connection), 3-pin outline (A1–A2–K), UL94 V0 epoxy, recommended footprint per DS4412 Figure 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | Independent anode terminal for first Schottky junction; routed separately for asymmetrical switching control |
| A2 | Anode 2 | Independent anode terminal for second Schottky junction; enables dual-output or phase-split rectification |
| K | Common Cathode | Shared cathode tab - electrically and thermally coupled to PCB copper pour for low-inductance, high-current return path |
Key Features
| Feature | Design Value |
|---|---|
| High junction temperature capability | Tj = 175 °C rating enables operation in sealed telecom chassis or industrial enclosures without forced air |
| Low thermal resistance | Rth(j-c) = 0.85 °C/W total allows >45 W combined dissipation with <90 °C temperature rise over heatsink |
| Avalanche energy rating | PARM = 1015 W at tp = 10 µs ensures robustness against inductive turn-off spikes in flyback or LLC resonant converters |
| Low leakage / VF trade-off | IR ≤ 30 mA @ 125 °C + VF = 0.69 V @ 20 A balances efficiency and standby loss in 24/48 V telecom PSUs |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant materials meet IEC 61249-2-21 and JEDEC J-STD-020 reflow standards |
Applications
| Telecom DC/DC Converter | Server PSU Secondary Side |
|---|---|
|
Use Scenario: 48 V input to 12 V/54 A output using synchronous rectification in phase-shifted full-bridge topology. IC Role / Device Role / Timing Role: Dual Schottky rectifier providing low-VF, low-loss secondary-side conduction with shared cathode return path. Use Value: Reduces conduction loss by 35% vs. Si diodes, lowering secondary-side temperature rise by 18 °C at full load. |
Use Scenario: 12 V output stage in 1+1 redundant ATX-style server PSU delivering up to 100 A. IC Role / Device Role / Timing Role: Dual-anode Schottky enabling interleaved conduction across two parallel output phases. Use Value: Enables 2×20 A per-phase handling with shared thermal path, reducing PCB copper area by 22% vs. discrete diodes. |
| Industrial SMPS Input Rectification | Base Station Power Module |
|
Use Scenario: 3-phase rectified 400 VAC input feeding PFC stage in 3 kW industrial drive power supply. IC Role / Device Role / Timing Role: Dual Schottky used in center-tap configuration for auxiliary bias supply and gate driver rail generation. Use Value: Delivers 2 × 20 A at <0.75 V VF with <30 mA IR at 125 °C, minimizing no-load consumption and thermal stress. |
Use Scenario: 28 V intermediate bus rectification in macro-cell base station RF power amplifier module. IC Role / Device Role / Timing Role: Dual Schottky rectifier supplying isolated 5 V and 12 V rails from same transformer secondary. Use Value: Shared cathode design simplifies layout and reduces EMI from separate return paths, improving RF noise margin by 4 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-40CPH017 | Same VRRM (170 V), but IF(AV) = 20 A per device (not per diode); Rth(j-c) = 1.0 °C/W higher; TO-247 only | Limited to single-diode topologies; unsuitable for dual-anode interleaving or center-tap use | Select when board space allows TO-247 and dual-anode functionality is unnecessary |
| ON Semiconductor MBR40170CT | Identical pinout and ratings, but VF = 0.82 V (typ.) at 20 A/125 °C; Rth(j-c) = 1.25 °C/W per diode | Higher conduction loss increases thermal load by ~1.8 W per diode at full load | Acceptable where cost sensitivity outweighs 5–7% efficiency penalty and thermal margin is ample |
Compared with VS-40CPH017 and MBR40170CT, STPS40170CG delivers superior thermal performance (0.85 °C/W total), lower VF (0.69 V), and true dual-anode flexibility - making it optimal for interleaved, center-tap, or dual-rail telecom and server power designs requiring minimal footprint and maximum efficiency.
Availability
STPS40170CG is available at Aetrix Electronics and suitable for telecom DC/DC converters, server power supplies, and industrial SMPS requiring stable component supply with D²PAK surface-mount compatibility and high-reliability Schottky performance.
Supply support for STPS40170CG 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.
The STPS40170CG belongs to ST's high-voltage Schottky rectifier product line, engineered specifically for high-efficiency, high-power-density switched-mode power supplies in telecom infrastructure and datacenter equipment.
FAQ
What is the maximum continuous forward current rating for each diode in STPS40170CG?
Each diode is rated for 20 A average forward current (IF(AV)) at case temperature Tc = 150 °C, with derating to 12 A at Tc = 175 °C. The device's dual-diode structure allows 40 A total conduction when both anodes are driven simultaneously with proper thermal management.
Does STPS40170CG support avalanche energy handling, and what is its rated value?
Yes - STPS40170CG is specified for repetitive avalanche operation with PARM = 1015 W at pulse duration tp = 10 µs and junction temperature Tj = 125 °C. This rating ensures robustness against inductive switching transients in flyback, LLC, and phase-shifted converters without external snubbers.
How does the D²PAK package of STPS40170CG compare thermally to TO-247 and TO-220AB variants?
The D²PAK (STPS40170CG) achieves Rth(j-c) = 0.85 °C/W total - 0.25 °C/W better than TO-247 (1.10 °C/W) and 0.45 °C/W better than TO-220AB (1.30 °C/W) - due to larger copper tab area and optimized die attach, enabling higher power density in surface-mount designs.
Is STPS40170CG compatible with lead-free reflow profiles, and what is its moisture sensitivity level?
Yes - STPS40170CG is qualified for standard lead-free reflow (JEDEC J-STD-020, peak 260 °C) and carries MSL-1 rating (unlimited floor life at ≤30 °C/60% RH), per ECOPACK®2 compliance. No bake preconditioning is required prior to assembly.
STPS40170CG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 170 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 920 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 30 µA @ 170 V
- Operating Temperature - Junction:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
STPS40170CG FAQ
1.How can I place an order for STPS40170CG through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS40170CG 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 STPS40170CG reliable?
The price and inventory of STPS40170CG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS40170CG is usually 5 days.
3.What payment methods are accepted for STPS40170CG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS40170CG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS40170CG?
STPS40170CG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS40170CG 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 STPS40170CG?
For technical support, including STPS40170CG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS40170CG requirements.
6.How does Aetrix verify that STPS40170CG is sourced from the original manufacturer or authorized distributors?
All STPS40170CG 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 STPS40170CG meets industry standards.
7.What is the process for return or replacement of STPS40170CG?
All STPS40170CG units undergo pre-shipment inspection (PSI). If there is an issue with STPS40170CG, 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 STPS40170CG part is unused and in its original packaging.
Return procedure for STPS40170CG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS40170CG Tags
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BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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