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STPS40L45CG Equivalent & Substitute Parts
Part Overview
The STPS40L45CG is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with a maximum reverse voltage of 45 V and average rectified current of 20 A per diode. The component is housed in a TO-263-3 D2PAK surface mount package. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement continuity. Active alternatives with identical or compatible electrical and mechanical specifications are available from multiple manufacturers.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Diode Configuration | 1 Pair Common Cathode | — |
| Technology | Schottky | — |
| Voltage - DC Reverse (Vr) (Max) | 45 | V |
| Current - Average Rectified (Io) (per Diode) | 20 | A |
| Voltage - Forward (Vf) (Max) @ If | 530 mV @ 20 A | — |
| Speed | Fast Recovery ≤ 500ns, > 200mA (Io) | — |
| Current - Reverse Leakage @ Vr | 600 µA @ 45 V | — |
| Operating Temperature - Junction (Max) | 150 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | TO-263-3, D2PAK (2 Leads + Tab), TO-263AB | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the STPS40L45CG is determined by strict equivalence across the following critical parameters:
Primary Equivalence Criteria:
- Diode configuration: 1 pair common cathode
- Technology: Schottky
- Voltage rating: 45 V DC reverse maximum
- Current rating: 20 A average rectified per diode
- Forward voltage: 530 mV @ 20 A
- Recovery speed: Fast recovery ≤ 500ns, > 200mA
- Package: TO-263-3 D2PAK surface mount
- RoHS3 compliance
Parametric Equivalent Classification: Parts meeting all primary equivalence criteria with identical electrical performance and package specifications are classified as parametric equivalents. These parts are direct functional replacements with no circuit redesign required.
Similar Classification: Parts that share the same package, diode configuration, and Schottky technology but differ in one or more electrical parameters (voltage rating, current rating, forward voltage, or reverse leakage) are classified as similar. These parts may require circuit evaluation before substitution.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Vr (Max) [V] | Io (per Diode) [A] | Vf (Max) @ If [mV] | Ir @ Vr [µA/mA] | Tj (Max) [°C] | Product Status | Package | Packaging Type |
|---|---|---|---|---|---|---|---|---|---|
| STPS40L45CG | STMicroelectronics | 45 | 20 | 530 @ 20 A | 600 µA @ 45 V | 150 | Obsolete | TO-263-3 D2PAK | — |
| STPS40L45CG-TR | STMicroelectronics | 45 | 20 | 530 @ 20 A | 600 µA @ 45 V | 150 | Active | TO-263-3 D2PAK | Cut Tape (CT) & Digi-Reel® |
| STPS40L45CGY-TR | STMicroelectronics | 45 | 20 | 530 @ 20 A | 600 µA @ 45 V | 150 | Active | TO-263-3 D2PAK | Tape & Reel (TR) |
| STPS41L45CG-TR | STMicroelectronics | 45 | 20 | 530 @ 20 A | 1.2 mA @ 45 V | 150 | Active | TO-263-3 D2PAK | Cut Tape (CT) & Digi-Reel® |
| 40CTQ045S | SMC Diode Solutions | 45 | 20 | 530 @ 20 A | 1 mA @ 45 V | 150 | Active | TO-263-3 D2PAK | Cut Tape (CT) & Digi-Reel® |
| DSSK28-0045BS-TRL | IXYS | 45 | 15 | 480 @ 15 A | 20 mA @ 45 V | 150 | Active | TO-263-3 D2PAK | Tape & Reel (TR) |
| STB30200C | SMC Diode Solutions | 200 | — | 1.1 V @ 15 A | 160 µA @ 200 V | 150 | Active | TO-263-3 D2PAK | Tape & Reel (TR) |
| VS-40CTQ045S-M3 | Vishay General Semiconductor - Diodes Division | 45 | 20 | 530 @ 20 A | 3 mA @ 45 V | 150 | Active | TO-263-3 D2PAK | Tube |
Engineering Selection Recommendations
Parametric Equivalent Selection (Direct Replacement):
STPS40L45CG-TR and STPS40L45CGY-TR are parametric equivalents of the obsolete STPS40L45CG. Both parts are manufactured by STMicroelectronics and maintain identical electrical specifications across all critical parameters. STPS40L45CG-TR is available in Cut Tape and Digi-Reel packaging with 2688 units in stock. STPS40L45CGY-TR is available in Tape & Reel packaging with 2200 units in stock and includes automotive-grade qualification (AEC-Q101) with extended operating temperature range of -40°C to 150°C, suitable for automotive applications.
Alternative Parametric Equivalent:
VS-40CTQ045S-M3 manufactured by Vishay General Semiconductor is a parametric equivalent meeting all electrical and package specifications. This part is available in Tube packaging with 8986 units in stock and supports extended operating temperature range of -55°C to 150°C. Reverse leakage current is specified at 3 mA @ 45 V, which is higher than the original specification but within acceptable limits for most applications.
Similar Parts with Reduced Current Rating:
DSSK28-0045BS-TRL manufactured by IXYS is classified as similar due to reduced average rectified current of 15 A per diode compared to the 20 A specification of the original part. This part is suitable only for applications where the 15 A current rating is sufficient. Forward voltage is specified at 480 mV @ 15 A. Reverse leakage current is 20 mA @ 45 V. Operating temperature range is -55°C to 150°C.
Similar Parts with Different Voltage Rating:
STB30200C manufactured by SMC Diode Solutions is classified as similar due to significantly higher reverse voltage rating of 200 V. This part is suitable only for applications requiring higher voltage blocking capability. Current rating and forward voltage specifications differ from the original part.
Similar Parts with Different Specifications:
40CTQ045S manufactured by SMC Diode Solutions maintains the 45 V voltage rating and 20 A current rating but exhibits higher reverse leakage current of 1 mA @ 45 V compared to the original 600 µA specification. STPS41L45CG-TR manufactured by STMicroelectronics maintains all electrical specifications except reverse leakage current, which is specified at 1.2 mA @ 45 V.
All recommended substitutes are RoHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity).
Frequently Asked Questions (FAQ)
Q: Can STPS40L45CG-TR be used as a direct replacement for the obsolete STPS40L45CG?
A: Yes. STPS40L45CG-TR is a parametric equivalent with identical electrical specifications and package configuration. The only difference is packaging format (Cut Tape & Digi-Reel versus the original unspecified packaging). Both parts are manufactured by STMicroelectronics and are RoHS3 compliant.
Q: What is the difference between STPS40L45CG-TR and STPS40L45CGY-TR?
A: Both parts are parametric equivalents with identical electrical specifications. STPS40L45CGY-TR includes automotive-grade qualification (AEC-Q101) and extended operating temperature range of -40°C to 150°C, making it suitable for automotive applications. STPS40L45CG-TR has a maximum junction temperature of 150°C without automotive qualification. Packaging differs: STPS40L45CG-TR uses Cut Tape & Digi-Reel, while STPS40L45CGY-TR uses Tape & Reel.
Q: Is VS-40CTQ045S-M3 a suitable replacement?
A: Yes. VS-40CTQ045S-M3 is a parametric equivalent meeting all electrical and package specifications. The part is manufactured by Vishay and supports extended operating temperature range of -55°C to 150°C. Reverse leakage current is 3 mA @ 45 V, which is higher than the original 600 µA specification but acceptable for most applications. Packaging is Tube format.
Q: Can DSSK28-0045BS-TRL be used as a substitute?
A: DSSK28-0045BS-TRL is classified as similar, not parametric equivalent, due to reduced average rectified current of 15 A per diode versus the original 20 A specification. This part is suitable only for applications where the 15 A current rating is sufficient. Circuit evaluation is required before substitution.
Q: What is the significance of reverse leakage current differences among the substitute parts?
A: Reverse leakage current affects power dissipation and circuit performance at maximum reverse voltage. The original STPS40L45CG specifies 600 µA @ 45 V. Substitute parts show variations: STPS40L45CG-TR and STPS40L45CGY-TR maintain 600 µA, while STPS41L45CG-TR specifies 1.2 mA, 40CTQ045S specifies 1 mA, VS-40CTQ045S-M3 specifies 3 mA, and DSSK28-0045BS-TRL specifies 20 mA. Higher leakage current increases standby power consumption and heat generation.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All parametric equivalent and similar parts listed are RoHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity).
Q: What packaging options are available for direct replacement?
A: Parametric equivalents are available in multiple packaging formats: STPS40L45CG-TR (Cut Tape & Digi-Reel), STPS40L45CGY-TR (Tape & Reel), and VS-40CTQ045S-M3 (Tube). All maintain the TO-263-3 D2PAK surface mount package configuration.
Q: Should I select the automotive-grade STPS40L45CGY-TR for non-automotive applications?
A: Automotive-grade qualification (AEC-Q101) and extended temperature range are not required for non-automotive applications. STPS40L45CG-TR is suitable for standard industrial and commercial applications. STPS40L45CGY-TR is recommended only when automotive-grade certification or extended temperature performance is specified.
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