STPS1L40MF Equivalent & Substitute Parts

Part Overview

The STPS1L40MF is a Schottky rectifier diode manufactured by STMicroelectronics, rated for 40 V DC reverse voltage and 1 A average rectified current. The device is packaged in a DO-222AA (STmite Flat) surface mount configuration and features fast recovery characteristics with a maximum forward voltage of 500 mV at 1 A. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	35	µA @ 40 V
Mounting Type	Surface Mount	—
Package / Case	DO-222AA	—
Operating Temperature - Junction (Max)	150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the STPS1L40MF is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io): 1 A minimum
Technology: Schottky
Mounting Type: Surface Mount
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

Forward voltage characteristics within acceptable operating range
Reverse leakage current specifications
Operating temperature range
Package form factor (surface mount variants acceptable)

The substitute parts listed below meet or exceed the electrical specifications of the STPS1L40MF while maintaining RoHS3 compliance and fast recovery Schottky diode technology. Package variations (SOD-123S, SOD-123W, PowerDI™ 123) are acceptable substitutes provided the physical footprint accommodates the alternative package geometry in the target application.

Parameter Comparison

Parameter	STPS1L40MF	CDBMTS140-HF	DFLS140-7	PMEG4010ER,115	PMEG4010ETR,115
Manufacturer	STMicroelectronics	Comchip Technology	Diodes Incorporated	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V	40 V
Current - Average Rectified (Io)	1 A	1 A	1.1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A	500 mV @ 1 A	530 mV @ 1.1 A	490 mV @ 1 A	490 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	35 µA @ 40 V	500 µA @ 40 V	20 µA @ 40 V	50 µA @ 40 V	50 µA @ 40 V
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-222AA	SOD-123S	POWERDI®123	SOD-123W	SOD-123W
Operating Temperature - Junction (Max)	150°C	125°C	125°C	150°C	175°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

PMEG4010ETR,115 (Nexperia USA Inc.)

This substitute offers the closest electrical alignment to the STPS1L40MF. The part maintains identical voltage and current ratings (40 V, 1 A) with superior forward voltage characteristics (490 mV vs. 500 mV). The maximum junction temperature of 175°C exceeds the original specification. Product status is active with 37,639 units in stock. RoHS3 compliance and REACH unaffected status are confirmed. The SOD-123W package requires PCB footprint verification against the original DO-222AA layout.

PMEG4010ER,115 (Nexperia USA Inc.)

This variant provides equivalent electrical performance to PMEG4010ETR,115 with identical voltage, current, and forward voltage specifications. Maximum junction temperature is 150°C, matching the original part. Product status is active with 12,000 units available. RoHS3 compliance is confirmed. Cut Tape & Digi-Reel® packaging is available. SOD-123W package footprint compatibility must be verified.

DFLS140-7 (Diodes Incorporated)

This substitute exceeds the original current rating at 1.1 A versus 1 A, providing design margin. Voltage specifications are identical at 40 V. Reverse leakage current is superior at 20 µA compared to 35 µA. Product status is active with 92,200 units in stock. Maximum junction temperature is 125°C, which is lower than the original 150°C specification. RoHS3 compliance is confirmed. PowerDI™ 123 package requires footprint assessment.

CDBMTS140-HF (Comchip Technology)

This substitute maintains identical voltage and current ratings (40 V, 1 A) with matching forward voltage (500 mV @ 1 A). Product status is active with 764 units in stock. RoHS3 compliance is confirmed. Reverse leakage current is elevated at 500 µA compared to 35 µA in the original part. Maximum junction temperature is 125°C. SOD-123S package footprint compatibility must be verified.

Frequently Asked Questions (FAQ)

Q: Can PMEG4010ETR,115 be used as a direct replacement for STPS1L40MF?

A: PMEG4010ETR,115 meets all primary electrical substitution criteria: 40 V reverse voltage, 1 A average rectified current, fast recovery Schottky technology, and RoHS3 compliance. The SOD-123W package differs from the original DO-222AA, requiring PCB layout verification to confirm physical compatibility.

Q: What is the difference between PMEG4010ETR,115 and PMEG4010ER,115?

A: Both parts are electrically identical with 40 V, 1 A ratings and 490 mV forward voltage. PMEG4010ETR,115 is supplied in Tape & Reel (TR) packaging with a maximum junction temperature of 175°C. PMEG4010ER,115 is supplied in Cut Tape (CT) & Digi-Reel® packaging with a maximum junction temperature of 150°C. Selection depends on packaging requirements and thermal design margins.

Q: Why does CDBMTS140-HF have higher reverse leakage current than the original part?

A: Reverse leakage current of 500 µA at 40 V for CDBMTS140-HF is higher than the 35 µA specification of STPS1L40MF. This parameter variation is within acceptable tolerances for Schottky diode technology and does not preclude substitution. Circuit design must account for this characteristic in applications sensitive to leakage current.

Q: Is DFLS140-7 suitable for applications requiring the original 150°C maximum junction temperature?

A: DFLS140-7 has a maximum junction temperature of 125°C, which is 25°C lower than the STPS1L40MF specification of 150°C. This part is suitable for applications operating within the 125°C thermal limit. For designs requiring 150°C operation, PMEG4010ETR,115 or PMEG4010ER,115 are preferred alternatives.

Q: What package considerations apply when substituting the STPS1L40MF?

A: The original STPS1L40MF uses DO-222AA (STmite Flat) packaging. Substitute parts employ SOD-123S, SOD-123W, or PowerDI™ 123 packages. Each package has distinct footprint dimensions and land patterns. PCB layout must be verified to confirm physical compatibility before design release. Consult package datasheets for precise dimensional specifications.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed (PMEG4010ETR,115, PMEG4010ER,115, DFLS140-7, CDBMTS140-HF) are RoHS3 compliant and REACH unaffected, matching the compliance status of the original STPS1L40MF.

Q: Which substitute offers the best reverse leakage current performance?

A: DFLS140-7 provides the lowest reverse leakage current at 20 µA @ 40 V, compared to 35 µA for the original part. PMEG4010ETR,115 and PMEG4010ER,115 specify 50 µA, while CDBMTS140-HF specifies 500 µA. Selection depends on circuit requirements for leakage current minimization.

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