STPS30L40CW Equivalent & Substitute Parts

Part Overview

The STPS30L40CW is a Schottky diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode arrangement rated for 40 V DC reverse voltage and 15 A average rectified current per diode. The component is packaged in a Through Hole TO-247-3 case and features fast recovery characteristics with a maximum forward voltage of 550 mV at 15 A.

This part is classified as Obsolete, necessitating identification of equivalent substitute components for ongoing design support and procurement. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, diode configuration, and package type while considering manufacturing compliance status.

Substiute Parts

STPS30L40CW

STMicroelectronicsIn Stock: 1660STPS30L40CW Datasheet

Current PartRFQ

30CPQ040

Vishay General Semiconductor - Diodes DivisionIn Stock: 140730CPQ040 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STPS30L40CW is determined by strict alignment with the following electrical and mechanical parameters:

Critical Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io) (per Diode): 15 A
• Mounting Type: Through Hole
• Package / Case: TO-247-3

Performance Parameters:

• Voltage - Forward (Vf) (Max) @ If: ≤ 550 mV @ 15 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: ≤ 360 µA @ 40 V
• Operating Temperature - Junction (Max): ≥ 150°C

Substitute parts must satisfy all critical matching parameters. Performance parameters establish acceptable operational boundaries; substitute components may exhibit equal or superior performance characteristics within these limits.

Parameter Comparison

Engineering Selection Recommendations

The 30CPQ040 manufactured by Vishay General Semiconductor - Diodes Division satisfies all critical electrical and mechanical parameters required for substitution with the STPS30L40CW. Both components are classified as Obsolete products, indicating limited availability through standard distribution channels.

Compliance Considerations:

The STPS30L40CW carries ROHS3 Compliant certification, whereas the 30CPQ040 is RoHS non-compliant. Applications subject to RoHS regulatory requirements must retain the STPS30L40CW or identify alternative parts meeting ROHS3 Compliant status. For applications without RoHS mandates, the 30CPQ040 provides electrical equivalence.

Performance Differential:

The 30CPQ040 exhibits superior forward voltage performance at 540 mV versus 550 mV for the STPS30L40CW at 15 A, representing a 10 mV improvement. The 30CPQ040 demonstrates higher reverse leakage current at 1.75 mA compared to 360 µA for the STPS30L40CW at 40 V. The 30CPQ040 provides extended operating temperature range from −55°C to 150°C versus the STPS30L40CW maximum of 150°C.

Component selection between these parts depends on regulatory compliance requirements and acceptable reverse leakage specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can the 30CPQ040 directly replace the STPS30L40CW in existing designs?

A: The 30CPQ040 provides electrical and mechanical compatibility with the STPS30L40CW across voltage rating, current capacity, diode configuration, and TO-247-3 package type. Substitution is valid for applications without RoHS compliance mandates. Applications requiring ROHS3 Compliant certification must retain the STPS30L40CW or source alternative RoHS-compliant equivalents.

Q: What is the significance of the reverse leakage current difference between these parts?

A: The STPS30L40CW specifies 360 µA reverse leakage at 40 V, while the 30CPQ040 specifies 1.75 mA at the same conditions. This 4.86× difference may impact applications with stringent leakage requirements or high-impedance circuit configurations. Circuit analysis is necessary to determine acceptable leakage limits for specific applications.

Q: Are both parts available through standard distribution channels?

A: Both the STPS30L40CW and 30CPQ040 are classified as Obsolete products. Availability is limited to existing inventory held by component distributors. Current inventory status should be verified directly with suppliers before design commitment.

Q: Does the TO-247-3 package designation ensure mechanical interchangeability?

A: Both components utilize the TO-247-3 Through Hole package, ensuring identical mechanical footprint, lead configuration, and mounting compatibility. PCB layout and thermal management designs developed for the STPS30L40CW accommodate the 30CPQ040 without modification.

Q: What is the impact of the forward voltage difference on circuit performance?

A: The 30CPQ040 forward voltage of 540 mV at 15 A is 10 mV lower than the STPS30L40CW specification of 550 mV. This represents a 1.8% reduction in forward voltage drop, resulting in marginally lower power dissipation and heat generation. The difference is negligible for most applications but may provide minor efficiency improvements in power-sensitive designs.

Q: How does the extended temperature range of the 30CPQ040 affect substitution decisions?

A: The 30CPQ040 operating temperature range of −55°C to 150°C exceeds the STPS30L40CW maximum junction temperature of 150°C. This extended lower temperature limit provides operational capability in colder environments. Applications operating within the STPS30L40CW temperature specification experience no functional difference.