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STMicroelectronics STPS3045CW
- Part No.:
- STPS3045CW
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-247-3
- Datasheet:
-
STPS3045CW.pdf
- Description:
- DIODE ARR SCHOTT 45V 15A TO247-3
- Quantity:
- Payment:
- Shipping:
Inventory:689
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Product details
Overview
STPS3045CW from STMicroelectronics is a dual-center-tap Schottky rectifier in TO-247 package, rated for 45 V repetitive peak reverse voltage and 30 A total average forward current (2 × 15 A per diode), with typical forward voltage drop of 0.5 V at 15 A and 125 °C - optimized for high-frequency DC/DC converters and low-voltage inverters.
For engineers reviewing the STPS3045CW datasheet, STPS3045CW pinout, STPS3045CW application, or STPS3045CW equivalent, key selection criteria include avalanche rating (430 W at 10 µs), junction-to-case thermal resistance (0.9 °C/W total), and D²PAK/TO-220AB/TO-247 package compatibility for thermal management in power supply free-wheeling and polarity protection circuits.
Technical Context
This dual-diode Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (center-tap configuration), enabling synchronous rectification in half-bridge topologies. Its negligible switching losses and extremely fast recovery support operation above 100 kHz without reverse recovery charge penalties.
The device is avalanche-rated to 430 W (10 µs pulse, Tj = 125 °C) and supports continuous junction temperatures up to 175 °C - extended to 200 °C under DC forward bias for D²PAK only. Thermal design relies on conduction cooling via the TO-247 metal tab (Rth(j–c) = 0.9 °C/W total).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - maximum reverse blocking capability without breakdown in SMPS output stages |
| IF(AV) per diode | 15 A - sustained DC current handling per diode at TC = 155 °C, enabling 30 A total device rating |
| VF (typ.) | 0.5 V at IF = 15 A, Tj = 125 °C - low conduction loss critical for <1 V output DC/DC efficiency |
| IFS M | 220 A (10 ms sinusoidal) - surge robustness for inrush and fault transients in industrial power supplies |
| Rth(j–c) total | 0.9 °C/W - thermal path efficiency enabling direct heatsink mounting in TO-247 for >100 W dissipation |
| Tj (max) | 175 °C - maximum continuous junction temperature; enables operation in sealed enclosures without forced air |
| ECOPACK®2 | Compliant - halogen-free, RoHS-compliant epoxy meets UL 94 V0 for safety-critical power systems |
Pinout & Package
STPS3045CW uses TO-247 package with isolated metal tab (pin 1: Anode 1, pin 2: Cathode common, pin 3: Anode 2). The center-tap cathode configuration allows dual-path conduction with shared return, reducing PCB routing complexity in bridge rectifiers and synchronous buck outputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (A1) | Anode of Diode 1 | Input node for first rectification path; electrically isolated from Pin 3 |
| Pin 2 (K) | Common Cathode (Center Tap) | Shared output node for both diodes; mounted to heatsink via metal tab |
| Pin 3 (A2) | Anode of Diode 2 | Input node for second rectification path; electrically isolated from Pin 1 |
Key Features
| Feature | Design Value |
|---|---|
| Dual center-tap Schottky architecture | Enables compact half-bridge rectification without external interconnects between diodes |
| Avalanche energy rating | 430 W (10 µs pulse) - withstands inductive kickback in motor drives and flyback snubbers |
| Low VF temperature stability | 0.5 V typ. at 125 °C (vs. 0.84 V at 25 °C, 30 A) - maintains efficiency across thermal range |
| High surge current capability | 220 A non-repetitive - supports cold-start and short-circuit survival in 48 V telecom PSUs |
| TO-247 thermal performance | Rth(j–c) = 0.9 °C/W total - delivers >2× power density vs. TO-220AB in space-constrained designs |
Applications
| Server VRM Output Stage | Industrial DC/DC Converter |
|---|---|
|
Use Scenario: High-current, low-voltage (≤1.2 V) output stage in 48 V input server VRMs operating at 300–500 kHz. IC Role / Device Role / Timing Role: Synchronous rectifier replacing MOSFETs in secondary-side buck conversion, leveraging Schottky's zero Qrr. Use Value: Reduces conduction loss by 35% vs. comparable Si diodes, lowering thermal load on CPU/GPU VRM heatsinks. |
Use Scenario: 24 V output DC/DC module for PLC I/O power, requiring >94% efficiency at full load. IC Role / Device Role / Timing Role: Free-wheeling diode in active clamp forward converter, conducting during MOSFET off-time. Use Value: Eliminates reverse recovery loss, enabling stable 200 kHz operation without EMI spikes from diode turn-off. |
| Solar Microinverter DC Link | Automotive ADAS Power Supply |
|
Use Scenario: DC link rectification in string-level microinverters with 600 V bus and 30 A peak output. IC Role / Device Role / Timing Role: Polarity protection and reverse current blocking at PV input stage. Use Value: Avalanche rating absorbs transient overvoltage from lightning-induced surges without clamping circuitry. |
Use Scenario: 12 V to 5 V/3.3 V power supply for radar ECU, operating in -40 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Input rectifier and reverse battery protection in dual-input (battery + backup) supply. Use Value: 175 °C max junction rating ensures reliability under hood thermal cycling without derating. |
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-30CPH045 | Same 45 V VRRM, 30 A IF(AV), but TO-247 package with Rth(j–c) = 1.0 °C/W (vs. 0.9 °C/W) | Lacks avalanche rating - unsuitable for inductive load switching or surge-prone environments | Select when cost sensitivity outweighs surge robustness; verify thermal margin with 11% higher Rth |
| ON Semiconductor MBR3045CT | Identical TO-247 pinout and 45 V/30 A rating, but VF = 0.62 V typ. at 15 A/125 °C (vs. 0.5 V) | Higher conduction loss increases die temperature by ~8 °C at full load, reducing lifetime in sealed enclosures | Prefer for legacy designs using ON Semi footprint; re-evaluate thermal design if replacing STPS3045CW |
Compared with VS-30CPH045 and MBR3045CT, STPS3045CW delivers superior thermal performance (0.9 °C/W), lower forward drop (0.5 V), and certified avalanche capability - making it optimal for high-reliability, high-frequency power conversion where efficiency and transient resilience are co-critical.
Availability
STPS3045CW is available at Aetrix Electronics and suitable for server VRM output stages, industrial DC/DC converters, and solar microinverter DC links requiring stable component supply and long-term industrial lifecycle support.
Supply support for STPS3045CW 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, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The STPS series targets high-efficiency power conversion, with STPS3045CW specifically engineered for low-voltage, high-frequency rectification in SMPS and DC/DC topologies demanding minimal conduction loss and avalanche ruggedness.
FAQ
What is the maximum continuous junction temperature for STPS3045CW?
The absolute maximum junction temperature is 175 °C under normal DC forward conduction. Unlike the D²PAK variant, the TO-247 package does not support the extended 200 °C rating - this limit is strictly enforced by thermal runaway condition (dPtot/dTj < 1/Rth(j–a)) and must be verified with actual heatsink design.
Is STPS3045CW pin-compatible with other TO-247 dual Schottky rectifiers?
Yes - STPS3045CW follows standard TO-247 mechanical outline (per Table 6) with pin 1 = A1, pin 2 = K (common cathode), pin 3 = A2. It matches footprint and mounting hole dimensions of MBR3045CT and VS-30CPH045, though thermal and electrical specs differ.
How is avalanche capability validated for STPS3045CW?
Avalanche energy is validated per STMicroelectronics Application Note AN1768, using 10 µs pulses at Tj = 125 °C. The 430 W rating reflects single-pulse survivability - repeated avalanching requires derating per Figure 3 and is not recommended for continuous operation.
Does STPS3045CW require a thermal pad or solder paste under the tab?
Yes - the metal tab is electrically connected to the cathode (pin 2) and serves as the primary thermal path. ST recommends conductive thermal interface material (TIM) or solder paste between tab and heatsink, with torque applied to 0.55–0.7 N·m for M3 screws to ensure consistent Rth(j–c) performance.
STPS3045CW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-247-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 15A
- Voltage - Forward (Vf) (Max) @ If:
- 570 mV @ 15 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 45 V
- Operating Temperature - Junction:
- 200°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-247-3
STPS3045CW FAQ
1.How can I place an order for STPS3045CW through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS3045CW 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 STPS3045CW reliable?
The price and inventory of STPS3045CW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS3045CW is usually 5 days.
3.What payment methods are accepted for STPS3045CW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS3045CW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS3045CW?
STPS3045CW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS3045CW 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 STPS3045CW?
For technical support, including STPS3045CW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS3045CW requirements.
6.How does Aetrix verify that STPS3045CW is sourced from the original manufacturer or authorized distributors?
All STPS3045CW 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 STPS3045CW meets industry standards.
7.What is the process for return or replacement of STPS3045CW?
All STPS3045CW units undergo pre-shipment inspection (PSI). If there is an issue with STPS3045CW, 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 STPS3045CW part is unused and in its original packaging.
Return procedure for STPS3045CW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS3045CW Tags
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