STPS40L40CW Equivalent & Substitute Parts

Part Overview

The STPS40L40CW is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with 40 V reverse voltage rating and 20 A average rectified current per diode. The device is packaged in TO-247-3 through-hole configuration and features fast recovery characteristics suitable for high-frequency rectification applications.

The STPS40L40CW is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production builds and field replacements.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io) (per Diode)	20 A
Voltage - Forward (Vf) (Max) @ If	530 mV @ 20 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Mounting Type	Through Hole
Package / Case	TO-247-3
Operating Temperature - Junction (Max)	150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the STPS40L40CW is determined by the following critical parameters:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io) (per Diode): 20 A minimum
Voltage - Forward (Vf) (Max) @ If: 530 mV or lower at rated current
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Mechanical Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Mounting Type: Through Hole
Package / Case: TO-247-3 or equivalent through-hole package

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must meet or exceed all electrical parameters while maintaining identical diode configuration and technology. Package compatibility is required for through-hole mounting applications. All substitutes must maintain ROHS3 compliance.

Parameter Comparison

Parameter	STPS40L40CW	VS-40L40CW-N3	SBL2040PT-E3/45	VS-40L45CW-N3
Manufacturer	STMicroelectronics	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor
Product Status	Obsolete	Active	Active	Active
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	45 V
Current - Average Rectified (Io) (per Diode)	20 A	20 A	20 A	20 A
Voltage - Forward (Vf) (Max) @ If	530 mV @ 20 A	530 mV @ 20 A	550 mV @ 10 A	530 mV @ 20 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	800 µA @ 40 V	1.5 mA @ 40 V	1 mA @ 40 V	1.5 mA @ 45 V
Operating Temperature - Junction	150°C (Max)	-55°C ~ 150°C	-40°C ~ 125°C	150°C (Max)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-3	TO-247-3	TO-3P-3, SC-65-3	TO-247-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	5250 Pcs New Original In Stock	938 Pcs New Original In Stock	1105 Pcs New Original In Stock	1122 Pcs New Original In Stock

Engineering Selection Recommendations

Parametric Equivalent - VS-40L40CW-N3:

The VS-40L40CW-N3 is a parametric equivalent to the STPS40L40CW. Both devices share identical electrical specifications: 40 V reverse voltage, 20 A average rectified current, 530 mV forward voltage at 20 A, and fast recovery characteristics. Both are packaged in TO-247-3 through-hole configuration. The VS-40L40CW-N3 is manufactured by Vishay General Semiconductor and maintains active product status with ROHS3 compliance. This part is the primary direct replacement for the obsolete STPS40L40CW.

Similar Substitute - VS-40L45CW-N3:

The VS-40L45CW-N3 is a similar substitute with enhanced voltage rating of 45 V compared to the 40 V specification of the STPS40L40CW. All other electrical parameters remain identical: 20 A average rectified current, 530 mV forward voltage at 20 A, and fast recovery characteristics. The TO-247-3 package and through-hole mounting are maintained. This part is suitable for applications where higher voltage margin is acceptable or beneficial. The VS-40L45CW-N3 is active and ROHS3 compliant.

Similar Substitute - SBL2040PT-E3/45:

The SBL2040PT-E3/45 is a similar substitute with equivalent electrical performance at 40 V reverse voltage and 20 A average rectified current. The forward voltage specification is 550 mV at 10 A, which differs from the STPS40L40CW specification of 530 mV at 20 A. The package is TO-3P-3 (SC-65-3), which is mechanically compatible with TO-247-3 through-hole mounting applications. This part is active and ROHS3 compliant. The operating temperature range is -40°C to 125°C, which is narrower than the STPS40L40CW maximum of 150°C.

All substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and REACH unaffected status, ensuring regulatory compliance for new production applications.

Frequently Asked Questions (FAQ)

Q: Can VS-40L40CW-N3 be used as a direct replacement for STPS40L40CW?

A: Yes. The VS-40L40CW-N3 is a parametric equivalent with identical electrical specifications (40 V, 20 A, 530 mV @ 20 A) and identical TO-247-3 package. Both devices feature 1 pair common cathode Schottky configuration with fast recovery characteristics. The VS-40L40CW-N3 is active and ROHS3 compliant.

Q: What is the difference between VS-40L40CW-N3 and VS-40L45CW-N3?

A: The primary difference is the reverse voltage rating: VS-40L40CW-N3 is rated at 40 V, while VS-40L45CW-N3 is rated at 45 V. All other electrical parameters are identical. Both share the same TO-247-3 package and forward voltage specification of 530 mV at 20 A. The VS-40L45CW-N3 provides higher voltage margin for applications operating near the 40 V limit.

Q: Is SBL2040PT-E3/45 mechanically compatible with STPS40L40CW?

A: Yes. The SBL2040PT-E3/45 is packaged in TO-3P-3 (SC-65-3), which is mechanically compatible with TO-247-3 through-hole mounting. Both are through-hole packages suitable for PCB applications. However, the forward voltage specification differs: SBL2040PT-E3/45 is specified at 550 mV @ 10 A, compared to STPS40L40CW at 530 mV @ 20 A.

Q: What are the key electrical parameters that determine substitution compatibility?

A: The critical parameters are: (1) Voltage - DC Reverse (Vr) (Max) of 40 V or higher, (2) Current - Average Rectified (Io) (per Diode) of 20 A or higher, (3) Voltage - Forward (Vf) (Max) of 530 mV or lower at rated current, (4) Fast Recovery speed ≤ 500 ns, and (5) 1 Pair Common Cathode Schottky configuration. All substitute parts must meet or exceed these specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (VS-40L40CW-N3, VS-40L45CW-N3, and SBL2040PT-E3/45) are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). All maintain REACH unaffected status.

Q: What is the operating temperature range difference between substitutes?

A: The STPS40L40CW and VS-40L45CW-N3 both specify a maximum junction temperature of 150°C. The VS-40L40CW-N3 specifies -55°C to 150°C operating range. The SBL2040PT-E3/45 specifies -40°C to 125°C, which is narrower than the original part. For applications requiring operation above 125°C, SBL2040PT-E3/45 is not suitable.

Q: Can VS-40L45CW-N3 be used in place of STPS40L40CW in all applications?

A: The VS-40L45CW-N3 is suitable for applications where the 40 V specification is a design requirement or where higher voltage margin is acceptable. The 45 V rating provides additional voltage headroom. All other electrical parameters are identical. Verify that the application does not require the specific 40 V maximum rating before substitution.

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