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STMicroelectronics STPS41L45CG-TR
- Part No.:
- STPS41L45CG-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STPS41L45CG-TR.pdf
- Description:
- DIODE ARRAY SCHOTT 45V 20A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:940
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Product details
Overview
STPS41L45CG-TR from STMicroelectronics is a dual-center-tab low-drop Schottky rectifier in D2PAK package, rated for 45 V repetitive peak reverse voltage, 40 A total average forward current (2 × 20 A per diode), and 0.47 V max forward voltage at 125°C/20 A - optimized for 5 V output stages in offline AC/DC power supplies.
For engineers reviewing the STPS41L45CG-TR datasheet, STPS41L45CG-TR pinout, STPS41L45CG-TR application, or STPS41L45CG-TR equivalent, key selection criteria include conduction loss modeling (P = 0.28×IF(AV) + 0.0095×IF²(RMS)), thermal resistance (Rth(j–c) = 0.8 °C/W per diode), avalanche capability (10,000 W peak, 1 µs), dV/dt rating (10,000 V/µs), and TO-220AB/I2PAK-compatible footprint.
Technical Context
This dual Schottky rectifier integrates two independent anode-cathode junctions sharing a common center-tab cathode terminal, enabling synchronous free-wheeling or dual-output rectification in high-frequency DC–DC and offline SMPS topologies. Its negligible switching losses and extremely fast recovery support operation beyond 100 kHz without snubbers.
The device features specified avalanche capability (10,000 W, 1 µs, Tj = 25°C), critical dV/dt immunity of 10,000 V/µs, and low thermal resistance (0.8 °C/W junction-to-case per diode), allowing direct mounting to heatsinks without isolation washers in industrial-grade 5 V/20 A rail designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - supports input rectification up to 32 V RMS AC line with safety margin for surge transients |
| IF(AV) per diode | 20 A at Tc = 130°C - enables 5 V/20 A output stage with δ = 0.5 duty cycle in continuous conduction mode |
| VF(max) | 0.47 V at 20 A, 125°C - reduces conduction loss to ≤0.94 W per diode at full load |
| Rth(j–c) | 0.8 °C/W per diode - allows ≤40°C temperature rise above heatsink at 20 A, simplifying thermal design |
| dV/dt | 10,000 V/µs - prevents false turn-on during fast voltage transients in flyback and LLC resonant converters |
| PARM | 10,000 W (1 µs, Tj = 25°C) - provides single-pulse avalanche energy handling for inductive kick protection |
| IRRM | 1 A at VR = VRRM, tp = 2 µs - ensures stable blocking under high-frequency reverse bias in synchronous rectifier circuits |
Pinout & Package
D2PAK (TO-263) package with exposed metal tab serving as common cathode (K) for both diodes; three terminals: A1 (Anode 1), A2 (Anode 2), K (Common Cathode). Tab is electrically connected to cathode and must be mounted to heatsink with appropriate insulation if required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode of Diode 1 | Connects to primary-side switch node in dual-output flyback or independent winding in center-tapped forward converter |
| A2 | Anode of Diode 2 | Connects to secondary-side winding or alternate power path; enables dual-rail or redundancy configuration |
| K (Tab) | Common Cathode | Electrically tied to both diode cathodes; serves as main output node and thermal interface to heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.42–0.47 V at 20 A/125°C - cuts conduction loss by ≥35% vs. standard silicon rectifiers in 5 V rails |
| Negligible switching losses | No minority-carrier storage - eliminates reverse recovery charge (Qrr ≈ 0), removing need for snubbers in >100 kHz designs |
| Avalanche-rated | 10,000 W peak power (1 µs) - withstands inductive energy dump without failure in unregulated or transient-heavy supplies |
| High dV/dt immunity | 10,000 V/µs - prevents spurious conduction during fast-switching events in half-bridge and LLC topologies |
| Low thermal resistance | 0.8 °C/W junction-to-case per diode - enables compact heatsinking for 40 A total output in space-constrained adapters |
Applications
| Server PSU Secondary Side | Industrial AC/DC Adapter |
|---|---|
Use Scenario: 5 V/20 A output stage in 1U server power supply with dual forward topology. IC Role / Device Role / Timing Role: Dual Schottky rectifier providing synchronous rectification for two parallel 5 V windings. Use Value: 0.47 V VF(max) at 125°C reduces conduction loss to <1 W per diode, improving efficiency by 1.2% over Si alternatives at full load. | Use Scenario: Off-line 5 V/15 A adapter for PLC I/O modules with high ambient temperature (70°C). IC Role / Device Role / Timing Role: Center-tab Schottky rectifier delivering regulated 5 V output with minimal thermal derating. Use Value: Rth(j–c) = 0.8 °C/W enables stable operation at Tc = 130°C without forced air, supporting fanless industrial enclosures. |
| Telecom DC–DC Module | Automotive Infotainment Power |
Use Scenario: Input rectification for 48 V–to–5 V isolated DC–DC module in telecom shelf management system. IC Role / Device Role / Timing Role: Dual-anode Schottky used in active clamp forward configuration for high-efficiency 5 V standby rail. Use Value: 10,000 V/µs dV/dt rating prevents false triggering during fast gate-drive edge coupling into secondary side. | Use Scenario: 12 V–to–5 V buck-derived auxiliary supply in automotive head unit with cold-crank tolerance. IC Role / Device Role / Timing Role: Polarity protection and freewheeling diode in synchronous buck controller's low-side path. Use Value: Specified avalanche capability (10,000 W, 1 µs) absorbs inductive energy during battery voltage dip recovery without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS30L45CG-TR | 30 A total IF(AV) (2 × 15 A), identical VRRM and VF profile | Lower current rating suits 5 V/15 A adapters; reduced copper area needed on PCB | Select when thermal budget allows lower conduction loss at partial load and board space is constrained |
| VS-45CTH03-M3/45 | Vishay dual Schottky, 45 V/40 A, VF = 0.52 V max @ 20 A/125°C, Rth(j–c) = 0.95 °C/W | Slightly higher VF increases conduction loss by ~0.15 W per diode; same D2PAK footprint | Use when STMicroelectronics supply continuity is unavailable; verify thermal margin due to +0.15 °C/W higher Rth |
Compared with STPS30L45CG-TR, the STPS41L45CG-TR delivers +10 A total current headroom for sustained 5 V/20 A loads; versus VS-45CTH03-M3/45, it offers lower VF and superior thermal resistance, reducing heatsink requirements in thermally dense 1U systems.
Availability
STPS41L45CG-TR is available at Aetrix Electronics and suitable for server power supplies, industrial AC/DC adapters, telecom DC–DC modules, and automotive infotainment systems requiring stable component supply and long-term production continuity.
Supply support for STPS41L45CG-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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The STPS series targets high-efficiency, high-reliability power conversion - specifically engineered for low-voltage, high-current rectification in offline and isolated DC–DC applications where thermal performance and avalanche robustness are critical.
FAQ
What is the maximum junction temperature and how is it enforced?
The absolute maximum operating junction temperature is 150°C, validated via thermal characterization under steady-state conditions at Tc = 130°C and δ = 0.5. Derating curves in Figure 2 confirm 20 A average current is sustainable up to 70°C ambient with adequate heatsinking; exceeding 150°C risks permanent degradation of Schottky barrier integrity.
Can STPS41L45CG-TR be used in synchronous rectification topologies?
Yes - its negligible reverse recovery (Qrr ≈ 0) and fast switching enable use as a passive synchronous rectifier replacement in flyback, forward, and LLC converters. However, it lacks integrated gate control; external MOSFET drivers are required for true active synchronous rectification.
Is the center tab electrically isolated from the anodes?
No - the metal tab is the common cathode (K) terminal, directly bonded to both diode cathodes. It is not isolated; mounting requires either direct thermal contact to a grounded heatsink or insulated mounting hardware if cathode potential differs from chassis ground.
How does the 10,000 W avalanche rating translate to real-world reliability?
This rating specifies single-pulse energy absorption capability (10,000 W × 1 µs = 10 mJ) under controlled test conditions. In practice, it enables reliable operation during worst-case inductive turn-off events - such as MOSFET short-circuit or transformer saturation - without parametric shift or catastrophic failure in properly designed 5 V output stages.
STPS41L45CG-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 530 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1.2 mA @ 45 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
STPS41L45CG-TR FAQ
1.How can I place an order for STPS41L45CG-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS41L45CG-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 STPS41L45CG-TR reliable?
The price and inventory of STPS41L45CG-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS41L45CG-TR is usually 5 days.
3.What payment methods are accepted for STPS41L45CG-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS41L45CG-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS41L45CG-TR?
STPS41L45CG-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS41L45CG-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 STPS41L45CG-TR?
For technical support, including STPS41L45CG-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS41L45CG-TR requirements.
6.How does Aetrix verify that STPS41L45CG-TR is sourced from the original manufacturer or authorized distributors?
All STPS41L45CG-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 STPS41L45CG-TR meets industry standards.
7.What is the process for return or replacement of STPS41L45CG-TR?
All STPS41L45CG-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS41L45CG-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 STPS41L45CG-TR part is unused and in its original packaging.
Return procedure for STPS41L45CG-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS41L45CG-TR Tags
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