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STMicroelectronics STPS1545G-TR
- Part No.:
- STPS1545G-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STPS1545G-TR.pdf
- Description:
- DIODE SCHOTTKY 45V 15A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:5,698
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Product details
Overview
STPS1545G-TR from STMicroelectronics is a 45 V, 15 A average forward current power Schottky rectifier in D²PAK package, optimized for low-voltage, high-frequency DC-DC converters and switch-mode power supplies. It delivers typ. 0.5 V forward voltage at 15 A/125 °C, supports 220 A non-repetitive surge current, and features insulated construction with 2000 VRMS isolation rating.
For engineers reviewing the STPS1545G-TR datasheet, STPS1545G-TR pinout, STPS1545G-TR application, or STPS1545G-TR equivalent, key selection criteria include forward voltage drop at operating temperature, thermal resistance junction-to-case (0.8 °C/W typical for D²PAK), avalanche energy capability (430 W peak), and ECOPACK®2 compliance for industrial-grade reliability.
Technical Context
This single-die Schottky rectifier operates without minority-carrier storage delay, enabling negligible switching losses and extremely fast recovery-critical for >100 kHz DC-DC topologies. Its low VF and high IF(AV) rating are achieved via platinum-doped silicon barrier technology and optimized metal-semiconductor interface design.
The D²PAK package provides low thermal resistance (Rth(j-c) = 0.8 °C/W typ.) and robust mechanical mounting for high-power density board layouts. Avalanche capability is fully specified (PARM = 430 W, tp = 10 µs), allowing safe operation under inductive load transients without external snubbers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage; defines safe operating range in buck, flyback, and synchronous rectifier circuits. |
| IF(AV) | 15 A - Average forward current at TC = 130 °C for D²PAK; enables compact heatsink-free designs up to ~75 W output in 12 V input converters. |
| VF (typ.) | 0.5 V @ 15 A, 125 °C - Low conduction loss directly reduces power dissipation (P ≈ 7.5 W) and improves efficiency in high-current paths. |
| Rth(j-c) | 0.8 °C/W (typ.) - Junction-to-case thermal resistance for D²PAK; allows precise thermal modeling when mounted on copper pads per recommended footprint. |
| IFSM | 220 A @ tp = 10 ms - Non-repetitive surge rating; supports reliable startup and fault tolerance in motor drive freewheeling and battery protection circuits. |
| Tj (max.) | 175 °C - Maximum junction temperature; enables operation in harsh ambient environments (e.g., industrial power supplies, automotive under-hood). |
| IR (max.) | 40 mA @ 125 °C, VR = 45 V - Reverse leakage current; low enough to avoid significant standby loss in high-efficiency SMPS designs. |
Pinout & Package
STPS1545G-TR uses the D²PAK (TO-263) surface-mount package with three terminals: anode, cathode, and exposed thermal pad (cathode-connected). The package features a 10.0–10.55 mm width (E), 8.6–9.35 mm length (D), and 15.0–15.85 mm height (H), with 2.54 mm lead pitch (e) and integrated thermal pad for PCB heat spreading.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input terminal for forward conduction path | Connected to source side of converter (e.g., switch node in buck); must be routed with low-inductance trace to minimize ringing. |
| Cathode (Pin 2) | Output terminal for forward conduction path | Connected to output rail or ground return; electrically tied to exposed thermal pad for lowest possible Rth(j-a). |
| Exposed Pad | Thermal and electrical connection to cathode | Requires ≥200 mm² copper pour (FR4, 35 µm Cu) for Rth(j-a) ≤ 35 °C/W; solder mask opening mandatory per Figure 12. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.5 V typ. at 15 A/125 °C - Reduces conduction loss by >30% vs. standard silicon diodes, improving full-load efficiency in 5–24 V systems. |
| Avalanche-rated operation | 430 W peak avalanche power (tp = 10 µs) - Enables robust freewheeling in inductive loads without external clamping components. |
| Insulated package option | TO-220FPAC variant rated at 2000 VRMS - Not applicable to STPS1545G-TR (D²PAK), but confirms ST's insulation design capability across family. |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant materials with qualified lead-free solderability - Meets IPC-J-STD-020 moisture sensitivity level 3 (MSL3) requirements. |
| High surge current capability | 220 A IFSM (10 ms sine) - Supports repeated hot-plug events and short-circuit recovery in server PSU and telecom rectifier modules. |
Applications
| Server Power Supply Rectification | Industrial DC-DC Converter Output Stage |
|---|---|
Use Scenario: Secondary-side rectification in 48 V–12 V isolated buck-derived converters for rack-mounted servers. IC Role / Device Role / Timing Role: High-current Schottky rectifier replacing synchronous MOSFETs where gate drive complexity or cost must be minimized. Use Value: Delivers 0.5 V VF at 15 A/125 °C, reducing conduction loss by 2.25 W vs. alternatives with 0.65 V drop-directly lowering thermal load on 1U chassis airflow. |
Use Scenario: Output rectification in 24 V input, 3.3/5/12 V multi-rail industrial DC-DC modules. IC Role / Device Role / Timing Role: Freewheeling diode in non-synchronous flyback and forward converters operating at 200–500 kHz. Use Value: Extremely fast switching eliminates reverse recovery loss, enabling stable operation above 300 kHz without snubber networks or efficiency penalty. |
| Automotive Body Control Module (BCM) Power Path | Telecom Rectifier Board Polarity Protection |
Use Scenario: Reverse polarity protection and load dump clamping in 12 V BCM power inputs subjected to ISO 7637-2 pulse 5a (35 V/100 ms). IC Role / Device Role / Timing Role: Bidirectional clamp diode leveraging avalanche capability to absorb transient energy without failure. Use Value: Rated 430 W avalanche power (10 µs) ensures survivability during 12 V system load dump events-eliminating need for parallel TVS devices. |
Use Scenario: Input polarity protection on -48 V telecom rectifier boards where space and thermal budget are constrained. IC Role / Device Role / Timing Role: Low-VF series diode placed before bulk capacitor to block reverse current during hot-swap or redundancy switchover. Use Value: 0.5 V VF minimizes voltage drop across protection path, preserving regulation margin while supporting >10 A continuous current in compact D²PAK footprint. |
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-15SQ045 | Same 45 V VRRM, 15 A IF(AV), but TO-220AB package (Rth(j-c) = 1.6 °C/W); VF = 0.52 V @ 15 A/125 °C. | Higher thermal resistance requires larger heatsink; not surface-mount compatible. | Select when through-hole assembly or legacy footprint compatibility is required; avoid for high-density SMT designs. |
| ON Semiconductor MBR1545CT | Dual common-cathode configuration (15 A per diode), D²PAK package, VF = 0.55 V @ 15 A/125 °C; no avalanche rating specified. | Lacks documented avalanche capability; dual-diode layout increases board area vs. single-diode STPS1545G-TR. | Prefer for dual-output converters needing matched diodes; verify transient robustness separately if used in freewheeling roles. |
Compared with VS-15SQ045 and MBR1545CT, STPS1545G-TR offers superior thermal performance (0.8 °C/W vs. 1.6 °C/W), certified avalanche ruggedness, and single-diode D²PAK integration-making it optimal for space-constrained, high-reliability 12–48 V DC-DC outputs.
Availability
STPS1545G-TR is available at Aetrix Electronics and suitable for server power supply rectification, industrial DC-DC converter output stages, and automotive body control module power paths requiring stable component supply, long-lifecycle support, and qualified automotive-grade thermal performance.
Supply support for STPS1545G-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.
STPS1545G-TR belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in space- and thermally-constrained applications-from telecom infrastructure to automotive ECUs.
FAQ
What is the maximum allowable case temperature for continuous operation?
The STPS1545G-TR is rated for IF(AV) = 15 A at TC = 130 °C in D²PAK package. Exceeding this temperature reduces safe operating current per Figure 2; sustained operation above 130 °C requires derating to prevent thermal runaway, as (dPtot/dTj) must remain below 1/Rth(j-a) under actual board conditions.
Does STPS1545G-TR require a heatsink on standard FR4 PCB?
No external heatsink is required if the D²PAK thermal pad is soldered to ≥200 mm² of 35 µm copper (per Figure 12 footprint). With that layout, Rth(j-a) drops to ~35 °C/W, allowing 15 A operation at Tamb ≤ 60 °C. Smaller copper areas necessitate forced air or thermal vias to maintain Tj ≤ 175 °C.
Is the exposed thermal pad electrically isolated?
No-the exposed pad on STPS1545G-TR is internally connected to the cathode. It must be routed to the cathode net on the PCB and cannot be floated or grounded independently. Isolation is only offered in the TO-220FPAC variant (2000 VRMS), not in D²PAK.
How does its avalanche rating compare to standard silicon diodes?
Unlike conventional silicon diodes, STPS1545G-TR specifies PARM = 430 W (tp = 10 µs) at Tj = 125 °C-a rigorously tested parameter enabling safe energy absorption during inductive turn-off transients. Standard silicon diodes typically lack rated avalanche capability and may fail catastrophically under identical conditions.
STPS1545G-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:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 15A
- Voltage - Forward (Vf) (Max) @ If:
- 840 mV @ 30 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
- Operating Temperature - Junction:
- 175°C (Max)
STPS1545G-TR FAQ
1.How can I place an order for STPS1545G-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS1545G-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 STPS1545G-TR reliable?
The price and inventory of STPS1545G-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1545G-TR is usually 5 days.
3.What payment methods are accepted for STPS1545G-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1545G-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS1545G-TR?
STPS1545G-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS1545G-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 STPS1545G-TR?
For technical support, including STPS1545G-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1545G-TR requirements.
6.How does Aetrix verify that STPS1545G-TR is sourced from the original manufacturer or authorized distributors?
All STPS1545G-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 STPS1545G-TR meets industry standards.
7.What is the process for return or replacement of STPS1545G-TR?
All STPS1545G-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS1545G-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 STPS1545G-TR part is unused and in its original packaging.
Return procedure for STPS1545G-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS1545G-TR Tags
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