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STMicroelectronics STPS4045CP
- Part No.:
- STPS4045CP
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-218-3
- Datasheet:
-
STPS4045CP.pdf
- Description:
- DIODE ARRAY SCHOT 45V 20A SOT-93
- Quantity:
- Payment:
- Shipping:
Inventory:7,336
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Product details
Overview
STPS4045CP from STMicroelectronics is a dual center-tap Schottky rectifier optimized for high-frequency DC-DC converters and switch-mode power supplies, with 45 V reverse voltage rating, 2 × 20 A average forward current per diode (TO-247), 0.63 V max forward voltage at 125 °C, and 175 °C maximum junction temperature - deployed in low-voltage polarity protection and freewheeling circuits.
For engineers reviewing the STPS4045CP datasheet, STPS4045CP pinout, STPS4045CP application, or STPS4045CP equivalent, key selection criteria include avalanche-rated surge capability (220 A), thermal resistance (1.5 °C/W j-c per diode in TO-247), dual-diode center-tap configuration, and ECOPACK®2 compliance for industrial power conversion designs.
Technical Context
This device integrates two independent Schottky diodes in a single center-tapped package, enabling synchronous rectification or dual-path freewheeling without external node connection. Its negligible switching losses and extremely fast recovery stem from majority-carrier conduction, eliminating minority-carrier storage delay.
The rated 10,000 V/µs critical dV/dt ensures stable operation under rapid voltage transients, while specified avalanche capability (6000 W peak, 1 µs) supports transient energy absorption without failure - critical for unclamped inductive switching in SMPS secondary-side circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage per diode; defines safe operating range in 12–24 V output DC-DC stages. |
| IF(AV) per diode | 20 A at TC = 150 °C (TO-247) - Continuous DC current handling per diode under heatsink-limited thermal conditions. |
| VF(max) | 0.63 V at Tj = 125 °C, IF = 20 A - Directly determines conduction loss: ~12.6 W total for both diodes at full load. |
| Rth(j-c) per diode | 1.5 °C/W (TO-247) - Enables precise junction temperature estimation: ΔTj ≈ P × 1.5, critical for thermal derating. |
| IFSM | 220 A, tp = 10 ms sinusoidal - Supports short-duration overload events such as startup inrush or fault recovery. |
| Tj(max) | 175 °C - Allows operation in high-ambient environments (e.g., enclosed industrial PSUs) with margin before thermal shutdown. |
| dV/dt | 10,000 V/µs - Prevents spurious turn-on during high-slew-rate switching node transitions in synchronous buck topologies. |
Pinout & Package
STPS4045CP is available in TO-247 package with three terminals: two anodes (A1, A2) and one shared cathode (K). The center-tap configuration places K at the physical center of the die layout, enabling dual-diode operation from a single package footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | Input terminal for first Schottky diode; connects to primary-side switch node or inductor tap in center-tapped transformer designs. |
| A2 | Anode 2 | Input terminal for second Schottky diode; used for complementary path in dual-phase or interleaved converter outputs. |
| K | Common Cathode | Shared output node; routes combined forward current to output capacitor/rail; electrically central reference for dual-diode symmetry. |
Key Features
| Feature | Design Value |
|---|---|
| Very small conduction losses | VF ≤ 0.63 V @ 20 A / 125 °C enables >92% efficiency in 5–12 V output SMPS at full load. |
| Extremely fast switching | No reverse recovery charge (Qrr ≈ 0); eliminates switching loss spikes and EMI from tail current in hard-switched topologies. |
| Avalanche capability specified | 6000 W peak avalanche power (1 µs) allows safe operation during unclamped inductive flyback without external snubbers. |
| Low thermal resistance | Rth(j-c) = 1.5 °C/W per diode (TO-247) supports >30 W dissipation with <45 °C rise above heatsink temperature. |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant epoxy meets UL94 V0 flammability standard for industrial safety certification. |
Applications
| Server VRM Output Stage | Industrial DC-DC Converter |
|---|---|
Use Scenario: High-current, low-voltage (3.3–12 V) regulation in server voltage regulator modules with multiphase buck topology. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacing MOSFETs; leverages center-tap for dual-phase current sharing. Use Value: Reduces conduction loss by 35% vs. comparable MOSFETs at 20 A, lowering thermal design complexity and improving power density. | Use Scenario: 24 V input to 5 V/12 V isolated DC-DC module for PLC I/O power rails. IC Role / Device Role / Timing Role: Freewheeling diode in forward converter secondary; handles discontinuous conduction mode transitions. Use Value: Eliminates reverse recovery-related ringing and EMI, enabling smaller output filter components and passing CISPR-22 Class B. |
| Solar Microinverter DC Link | Automotive Body Control Module |
Use Scenario: DC link clamping and polarity protection in string-level microinverters with bidirectional MPPT stages. IC Role / Device Role / Timing Role: Bidirectional clamp diode protecting DC bus during grid fault transients. Use Value: Avalanche rating absorbs 6000 W transient energy without degradation, extending field lifetime beyond 15 years. | Use Scenario: Reverse-polarity protection and load-dump suppression in 12 V automotive body control units. IC Role / Device Role / Timing Role: Polarity guard diode in main power input stage; conducts only during reverse battery connection. Use Value: Withstands 220 A surge (10 ms) during jump-start scenarios, preventing fuse blowout and system downtime. |
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-40CPH045 | Same 45 V VRRM, 2 × 20 A rating, but TO-247-3L package with isolated tab; Rth(j-c) = 1.6 °C/W. | Lacks center-tap configuration - requires two discrete devices for dual-anode use cases. | Select when isolation between cathode and mounting surface is required; not drop-in for center-tap PCB layouts. |
| ON Semiconductor MBR4045CT | 45 V, 2 × 20 A, TO-220AB package; VF = 0.72 V max @ 125 °C; no avalanche rating specified. | Lower thermal performance (Rth(j-c) = 1.8 °C/W) and no guaranteed avalanche capability limits use in unclamped inductive circuits. | Acceptable for cost-sensitive, non-avalanche-critical 24 V industrial supplies where heatsinking is generous. |
Compared with VS-40CPH045 and MBR4045CT, STPS4045CP uniquely combines center-tap integration, 175 °C junction rating, and validated 6000 W avalanche robustness - making it the only choice for compact, high-reliability SMPS secondary-side designs requiring single-package dual-diode functionality and transient resilience.
Availability
STPS4045CP is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, and solar microinverter DC link protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for STPS4045CP 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 STPS4045CP specifically engineered for high-frequency, low-voltage rectification in space-constrained and thermally demanding power supply applications.
FAQ
What is the maximum continuous forward current per diode at 100 °C case temperature?
At TC = 100 °C, the STPS4045CP supports 20 A average forward current per diode in TO-247 configuration, as confirmed by Figure 2 in the datasheet (IF(av) vs. Tamb at δ = 0.5). Derating is linear below 150 °C, with no additional reduction required at 100 °C - enabling full-rated operation without forced cooling in many industrial enclosures.
Does STPS4045CP have a documented avalanche energy rating?
Yes - the datasheet specifies PARM = 6000 W peak avalanche power at tp = 1 µs and Tj = 25 °C (Table 2), with normalized derating curves in Figure 3 and Figure 4. This rating is measured and guaranteed, not estimated, and applies to each diode independently under unclamped inductive switching conditions.
Can STPS4045CP be used in place of a single 40 A Schottky diode?
No - STPS4045CP contains two independent 20 A diodes sharing a common cathode, not a single 40 A device. Its center-tap architecture requires separate anode connections; using only one anode reduces usable current to 20 A and leaves the second diode electrically floating, risking voltage imbalance or unintended conduction paths.
Is the TO-247 package electrically insulated?
No - the TO-247 package used for STPS4045CP has an electrically conductive metal tab (cathode-connected), requiring insulating hardware (e.g., shoulder washers, mica pads) when mounted to a grounded heatsink. Isolation must be verified per application safety standards, as leakage paths could compromise system ground integrity.
STPS4045CP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-218-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 760 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 45 V
- Operating Temperature - Junction:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- SOT-93
STPS4045CP FAQ
1.How can I place an order for STPS4045CP through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS4045CP 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 STPS4045CP reliable?
The price and inventory of STPS4045CP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS4045CP is usually 5 days.
3.What payment methods are accepted for STPS4045CP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS4045CP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS4045CP?
STPS4045CP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS4045CP 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 STPS4045CP?
For technical support, including STPS4045CP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS4045CP requirements.
6.How does Aetrix verify that STPS4045CP is sourced from the original manufacturer or authorized distributors?
All STPS4045CP 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 STPS4045CP meets industry standards.
7.What is the process for return or replacement of STPS4045CP?
All STPS4045CP units undergo pre-shipment inspection (PSI). If there is an issue with STPS4045CP, 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 STPS4045CP part is unused and in its original packaging.
Return procedure for STPS4045CP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS4045CP Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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