My Inquiry
My Account
STMicroelectronics STPS745G-TR
- Part No.:
- STPS745G-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STPS745G-TR.pdf
- Description:
- DIODE SCHOTTKY 45V 7.5A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,367
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STPS745G-TR from STMicroelectronics is a single silicon Schottky power rectifier in D²PAK (TO-263) package, rated for 45 V repetitive peak reverse voltage and 7.5 A average forward current at TC = 160 °C. It delivers low conduction loss (VF(typ) = 0.5 V at 7.5 A, Tj = 125 °C), negligible switching losses, and avalanche capability-optimized for high-frequency DC/DC converters and SMPS secondary-side rectification.
For engineers reviewing the STPS745G-TR datasheet, STPS745G-TR pinout, STPS745G-TR application, or STPS745G-TR equivalent, key selection criteria include thermal resistance (Rth(j-c) = 3.0 °C/W), insulated package compliance (ECOPACK®2), and surge rating (IFSM = 150 A, tp = 10 ms), especially in compact, thermally constrained 12–24 V output power stages.
Technical Context
This Schottky rectifier operates without minority-carrier storage, enabling ultrafast recovery (no reverse recovery charge Qrr) and minimal switching loss in hard-switched topologies. Its junction-to-case thermal resistance of 3.0 °C/W supports high-power density designs when mounted on ≥8 cm² copper area per Figure 9.
The device features specified avalanche energy handling (PARM = 190 W, tp = 10 µs, Tj = 125 °C) and insulating capability (2000 VRMS sine) only in TO-220FPAC variant-not applicable to D²PAK-but maintains robust reverse leakage (<15 mA at 125 °C, VR = 45 V) across its full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum reverse blocking voltage usable in 36 V nominal input systems with 20 % margin. |
| IF(AV) | 7.5 A at TC = 160 °C - Sustained DC output current achievable with heatsink interface temperature ≤160 °C. |
| VF(typ) | 0.5 V at IF = 7.5 A, Tj = 125 °C - Directly reduces conduction loss to ~3.75 W in continuous conduction mode. |
| Rth(j-c) | 3.0 °C/W - Enables 21 W power dissipation before reaching 175 °C junction limit under ideal mounting. |
| IFSM | 150 A, tp = 10 ms sinusoidal - Withstands typical inrush or short-circuit transients in 48 V bus protection circuits. |
| Tj(max) | +175 °C - Allows operation in sealed industrial enclosures with ambient up to 105 °C when properly derated. |
| IR(max) | 15 mA at Tj = 125 °C, VR = 45 V - Limits standby power loss in always-on auxiliary supplies. |
Pinout & Package
STPS745G-TR uses the D²PAK (TO-263) surface-mount package with isolated tab (anode-connected metal pad). The package has three terminals: anode (pin 1), cathode (pin 2), and exposed thermal pad (pin 3, electrically connected to cathode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input terminal for forward current flow | Connected to transformer secondary or switch node; must be routed with low-inductance trace to minimize ringing. |
| Cathode (Pin 2) | Output terminal for forward current flow | Connects to output capacitor and load; serves as reference for synchronous gate drive if used in hybrid topology. |
| Thermal Pad (Pin 3) | Cathode-connected exposed copper area | Requires ≥8 cm² FR4 copper pour (35 µm) for Rth(j-a) ≤ 40 °C/W; solder mask opening mandatory for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF | 0.5 V typ. at 7.5 A/125 °C enables >92 % efficiency in 5 V/6 A buck converter at 500 kHz. |
| Avalanche-rated | 190 W peak avalanche power (tp = 10 µs) allows safe operation during transient overvoltage events without snubber. |
| ECOPACK®2 compliant | Halogen-free, RoHS-compliant molding compound meets automotive and industrial environmental mandates. |
| High Tj max | 175 °C junction rating supports operation in sealed power supplies where ambient exceeds 100 °C. |
Applications
| Server VRM Output Rectification | Industrial PLC Power Supply |
|---|---|
Use Scenario: Secondary-side rectification in multiphase 12 V → 1.2 V VRMs delivering up to 120 A total. IC Role / Device Role / Timing Role: Uncontrolled freewheeling diode replacing synchronous MOSFETs in cost-sensitive legacy designs. Use Value: Eliminates gate drive complexity while maintaining <1.5 % voltage drop at full load due to 0.5 V VF. |
Use Scenario: 24 V DC/DC converter powering I/O modules in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Output rectifier in flyback or forward converter operating at 200–300 kHz switching frequency. Use Value: Zero reverse recovery prevents cross-conduction loss and EMI spikes during high dv/dt transitions. |
| Telecom AC/DC Adapter | Automotive Infotainment DC/DC |
Use Scenario: 48 V input, 5 V/3 A adapter for PoE-powered network equipment. IC Role / Device Role / Timing Role: Secondary-side rectifier in active-clamp forward topology. Use Value: Low thermal resistance (3.0 °C/W) enables natural convection cooling without heatsink in compact 60 mm × 40 mm PCB layout. |
Use Scenario: 12 V → 3.3 V/2 A point-of-load supply for display controller in head unit. IC Role / Device Role / Timing Role: Freewheeling diode in buck converter with 2 MHz switching frequency. Use Value: Negligible switching loss preserves efficiency above 88 % across -40 °C to +105 °C ambient range. |
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-75SQ045N-M3/45 | Same VRRM (45 V), higher IF(AV) = 7.5 A at TC = 115 °C; Rth(j-c) = 4.0 °C/W; no avalanche rating. | Lacks avalanche capability; requires larger heatsink area for same power dissipation. | Prefer when cost sensitivity outweighs transient robustness and thermal margin is available. |
| ON Semiconductor SB745A | Identical VRRM (45 V), IF(AV) = 7.5 A at TC = 115 °C; VF = 0.55 V (typ); Rth(j-c) = 3.5 °C/W; ECOPACK not claimed. | Slightly higher VF increases conduction loss by ~12 % at full load; no formal environmental compliance statement. | Acceptable for commercial-grade designs where RoHS/halogen-free is not mandated. |
Compared with VS-75SQ045N-M3/45 and SB745A, STPS745G-TR uniquely combines 175 °C Tj(max), 190 W avalanche rating, and 3.0 °C/W thermal resistance-making it optimal for thermally aggressive, reliability-critical industrial and telecom power stages.
Availability
STPS745G-TR is available at Aetrix Electronics and suitable for server VRMs, industrial PLC power supplies, telecom adapters, and automotive infotainment DC/DC converters requiring stable component supply and long-term manufacturability.
Supply support for STPS745G-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, digital, and mixed-signal ICs for industrial, automotive, and power applications.
STPS745G-TR belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-frequency switching power supplies where low VF and fast recovery are critical to system-level efficiency and thermal management.
FAQ
Is STPS745G-TR pin-compatible with TO-220AC or TO-220FPAC variants of STPS745?
No. STPS745G-TR uses the D²PAK (TO-263) package with three terminals: anode (pin 1), cathode (pin 2), and cathode-connected thermal pad (pin 3). TO-220AC and TO-220FPAC variants have different leadframe geometry, mounting holes, and thermal interface-requiring distinct PCB footprints and mechanical mounting schemes.
What is the maximum recommended PCB copper area for optimal thermal performance?
Per Figure 9 in the datasheet, a minimum of 8 cm² of 35 µm-thick copper on FR4 board is required to achieve Rth(j-a) ≤ 40 °C/W. For natural convection cooling at 7.5 A, ≥12 cm² is recommended; forced airflow further improves dissipation but does not eliminate need for adequate copper pour under the thermal pad.
Does STPS745G-TR require a heatsink in standard applications?
Not necessarily. With proper PCB copper area (≥8 cm²), STPS745G-TR can dissipate up to 21 W (at ΔT = 63 °C) without an external heatsink. In 7.5 A/0.5 V applications (~3.75 W loss), thermal rise remains below 15 °C-making discrete heatsinks unnecessary unless ambient exceeds 85 °C or layout constraints limit copper area.
Can STPS745G-TR be used in reverse polarity protection circuits?
Yes. As a unidirectional Schottky rectifier, it blocks reverse current when cathode is held at higher potential than anode. With 45 V VRRM and low IR (<100 µA at 25 °C), it provides effective reverse polarity protection for 24 V systems-though series MOSFET solutions offer lower forward drop in high-current (>10 A) cases.
STPS745G-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):
- 7.5A
- Voltage - Forward (Vf) (Max) @ If:
- 840 mV @ 15 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
- Operating Temperature - Junction:
- 175°C (Max)
STPS745G-TR FAQ
1.How can I place an order for STPS745G-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS745G-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 STPS745G-TR reliable?
The price and inventory of STPS745G-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS745G-TR is usually 5 days.
3.What payment methods are accepted for STPS745G-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS745G-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS745G-TR?
STPS745G-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS745G-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 STPS745G-TR?
For technical support, including STPS745G-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS745G-TR requirements.
6.How does Aetrix verify that STPS745G-TR is sourced from the original manufacturer or authorized distributors?
All STPS745G-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 STPS745G-TR meets industry standards.
7.What is the process for return or replacement of STPS745G-TR?
All STPS745G-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS745G-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 STPS745G-TR part is unused and in its original packaging.
Return procedure for STPS745G-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS745G-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
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
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…
