My Inquiry
My Account
STMicroelectronics STPS5045SG-TR
- Part No.:
- STPS5045SG-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STPS5045SG-TR.pdf
- Description:
- DIODE SCHOTTKY 45V 50A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:48,808
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STPS5045SG-TR from STMicroelectronics is a dual center-tap Schottky rectifier in D2PAK package, rated for 50 A average forward current, 45 V repetitive peak reverse voltage, and 200 °C maximum junction temperature. It delivers low forward voltage drop (0.48 V at 10 A, 200 °C), negligible switching losses, and low thermal resistance (1.0 °C/W junction-to-case), making it ideal for high-frequency DC-DC converters and photovoltaic bypass protection.
For engineers reviewing the STPS5045SG-TR datasheet, STPS5045SG-TR pinout, STPS5045SG-TR application, or STPS5045SG-TR equivalent, key selection considerations include its avalanche-rated capability (1200 W, 10 µs), dual-center-tap configuration for symmetrical conduction paths, thermal performance under forced-air or heatsink mounting, and suitability for low-voltage, high-current freewheeling and polarity protection circuits.
Technical Context
This device implements a dual common-cathode Schottky structure with center-tapped anodes, enabling balanced current sharing in half-bridge or synchronous rectification topologies. Its silicon carbide–free Schottky architecture ensures zero reverse recovery charge and ultrafast switching essential for >100 kHz SMPS designs.
Thermal design is enabled by direct metal tab mounting and low Rth(j-c) of 1.0 °C/W; derating curves confirm stable operation up to 175 °C ambient when mounted on ≥35 cm² copper area. Avalanche energy rating (1200 W, 10 µs) supports transient overvoltage resilience without external clamping in PV junction box applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum reverse blocking voltage before breakdown; defines safe operating range in 12–24 V bus systems. |
| IF(AV) | 50 A at Tc = 135 °C - Continuous DC current handling capacity with proper heatsinking. |
| VF(max) | 0.48 V at IF = 10 A, Tj = 200 °C - Enables <0.5 W conduction loss per diode leg at rated load. |
| Rth(j-c) | 1.0 °C/W - Allows precise junction temperature estimation from case temperature measurement. |
| IFSM | 600 A (10 ms sine) - Supports surge immunity during power-up or fault transients in industrial inverters. |
| PARM | 1200 W (10 µs pulse, Tj = 125 °C) - Enables self-limiting avalanche operation during line surges without failure. |
Pinout & Package
Package: D2PAK (TO-263AB), surface-mount with isolated metal tab for thermal and electrical connection. Dimensions per ST Doc ID022861 Rev 1: L = 15.0–15.85 mm, W = 10.0–10.4 mm, height = 4.4–4.6 mm; UL94 V0 epoxy; ECOPACK® compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (A1) | Input terminal for first Schottky diode | Center-tapped anode enables dual-path conduction; electrically isolated from A2 but shares cathode node. |
| Anode 2 (A2) | Input terminal for second Schottky diode | Paired with A1 to form symmetrical input legs; required for center-tap transformer or split-rail configurations. |
| Cathode (K) | Common output node | Single low-impedance return path for both diodes; connected to exposed metal tab for thermal conduction and low-inductance grounding. |
| Tab (Metal) | Thermal & electrical interface | Electrically tied to cathode; must be soldered to PCB copper pour or heatsink for thermal management and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Dual center-tap Schottky topology | Enables single-package implementation of two matched diodes sharing one cathode, reducing board space and parasitic mismatch in synchronous rectifiers. |
| 200 °C maximum junction temperature | Supports operation in high-ambient environments (e.g., enclosed solar junction boxes) without derating below full current rating. |
| Avalanche-rated (1200 W, 10 µs) | Eliminates need for external TVS in PV bypass applications where string-level reverse voltage transients occur. |
| Low Rth(j-c) = 1.0 °C/W | Permits accurate thermal modeling and predictable lifetime estimation using case temperature monitoring instead of inaccessible junction sensing. |
Applications
| Photovoltaic Bypass Protection | High-Frequency DC-DC Converter Output Rectification |
|---|---|
Use Scenario: Installed across individual PV cell substrings in smart junction boxes to prevent hot-spot damage during partial shading. IC Role / Device Role / Timing Role: Passive bypass diode conducting only during reverse bias events; no timing or control function. Use Value: Avalanche rating absorbs transient energy from string-level voltage reversal; low VF minimizes power loss during normal forward conduction. | Use Scenario: Secondary-side rectification in 200–500 kHz isolated flyback or forward converters for telecom and server power supplies. IC Role / Device Role / Timing Role: High-efficiency unidirectional current steering; zero Qrr eliminates reverse recovery loss. Use Value: Conduction loss <0.5 W at 50 A reduces thermal load vs. Si diodes; D2PAK tab enables direct heatsink attachment for compact layout. |
| Low-Voltage Inverter Freewheeling | Polarity Protection in 12/24 V Systems |
Use Scenario: Freewheeling path in motor drive H-bridges or solenoid drivers operating from 12–24 V DC buses. IC Role / Device Role / Timing Role: Provides low-loss recirculation path for inductive kickback; conducts only during switch-off transitions. Use Value: Extremely fast switching avoids voltage spikes; low VF limits heat generation during high-duty-cycle operation. | Use Scenario: Reverse-polarity input protection in automotive infotainment or industrial control modules. IC Role / Device Role / Timing Role: Series-connected blocking diode preventing damage from incorrect battery connection. Use Value: 45 V VRRM exceeds 24 V system transients; 50 A rating supports high-current loads like display backlights or fans. |
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-50W04 | Single-diode TO-247 package; 50 A, 40 V, Rth(j-c) = 1.2 °C/W; no avalanche rating. | Lacks center-tap configuration and avalanche robustness; requires two devices for dual-path use. | Select when discrete mounting and higher voltage margin (40 V vs. 45 V) are prioritized over integration and surge resilience. |
| ON Semiconductor MBR5045CT | D2PAK dual center-tap; 50 A, 45 V, but Tj(max) = 175 °C and no specified avalanche rating. | Lower max junction temperature limits ambient operating range in sealed enclosures; no guaranteed avalanche energy absorption. | Prefer when cost sensitivity outweighs need for 200 °C operation or PV-grade transient tolerance. |
Compared with VS-50W04 and MBR5045CT, STPS5045SG-TR uniquely combines 200 °C junction rating, 1200 W avalanche capability, and dual center-tap integration in D2PAK-making it the only option qualified for high-reliability PV bypass and thermally constrained industrial inverters.
Availability
STPS5045SG-TR is available at Aetrix Electronics and suitable for photovoltaic junction boxes, high-frequency DC-DC converters, and 12/24 V polarity protection systems requiring stable component supply and long-term manufacturing continuity.
Supply support for STPS5045SG-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 power conversion with Schottky rectifiers optimized for low VF, high Tj, and rugged packaging-specifically addressing thermal and reliability demands in solar, computing, and motor control applications.
FAQ
Is STPS5045SG-TR suitable for surface-mount reflow assembly?
Yes. The D2PAK package is qualified for standard lead-free reflow profiles (JEDEC J-STD-020), including peak temperatures up to 260 °C. The metal tab must be soldered to a large copper pour for thermal compliance; stencil design should accommodate the tab's thermal mass to ensure complete wetting.
What is the maximum recommended PCB copper area for thermal performance?
Per Figure 8 in the datasheet, optimal thermal resistance (Rth(j-a)) is achieved with ≥35 cm² of 35 µm-thick FR4 copper under the tab. Performance degrades gradually below 20 cm²; below 10 cm², derating below 50 A is required even with forced air.
Does STPS5045SG-TR require a heatsink in typical applications?
A dedicated heatsink is not mandatory if PCB copper area ≥35 cm² is used and ambient temperature remains ≤70 °C. At 50 A continuous load and 100 °C ambient, a heatsink with Rth(c-s) ≤ 0.5 °C/W is required to maintain Tj ≤ 200 °C based on Rth(j-c) = 1.0 °C/W.
How does the avalanche rating translate to real-world surge protection?
The 1200 W (10 µs) avalanche rating means the device can safely absorb single-energy transients up to that level without degradation. In PV bypass use, this covers worst-case reverse voltage surges from adjacent substring failures-verified per IEC 61215 and UL 1703 test conditions.
STPS5045SG-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
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 50A
- Voltage - Forward (Vf) (Max) @ If:
- 610 mV @ 50 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 360 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
- Operating Temperature - Junction:
- 200°C (Max)
STPS5045SG-TR FAQ
1.How can I place an order for STPS5045SG-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS5045SG-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 STPS5045SG-TR reliable?
The price and inventory of STPS5045SG-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS5045SG-TR is usually 5 days.
3.What payment methods are accepted for STPS5045SG-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS5045SG-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS5045SG-TR?
STPS5045SG-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS5045SG-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 STPS5045SG-TR?
For technical support, including STPS5045SG-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS5045SG-TR requirements.
6.How does Aetrix verify that STPS5045SG-TR is sourced from the original manufacturer or authorized distributors?
All STPS5045SG-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 STPS5045SG-TR meets industry standards.
7.What is the process for return or replacement of STPS5045SG-TR?
All STPS5045SG-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS5045SG-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 STPS5045SG-TR part is unused and in its original packaging.
Return procedure for STPS5045SG-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS5045SG-TR Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
