LSM540JE3/TR13 Equivalent & Substitute Parts

Part Overview

The LSM540JE3/TR13 is a Schottky rectifier diode manufactured by Microchip Technology, rated for 40 V DC reverse voltage and 5 A average rectified current in a DO-214AB surface mount package. This component is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory constraints, or specific manufacturer preferences while maintaining electrical and mechanical compatibility within defined parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	5	A
Voltage - Forward (Vf) (Max) @ If	520 mV @ 5 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	2	mA @ 40 V
Technology	Schottky	—
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LSM540JE3/TR13 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal 40 V
Technology: Must be Schottky
Package / Case: Must be DO-214AB, SMC
Mounting Type: Must be Surface Mount
RoHS Status: Must be ROHS3 Compliant

Secondary Compatibility Parameters:

Current - Average Rectified (Io): Substitute parts rated at 5 A or higher are electrically compatible
Voltage - Forward (Vf) (Max) @ If: Variations within ±100 mV at rated current are acceptable for circuit operation
Operating Temperature - Junction: Minimum range must encompass -55°C to 150°C or equivalent
Speed: Must maintain Fast Recovery ≤ 500ns, > 200mA (Io)

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (5 A Rating): Parts with identical 5 A current rating and matching voltage specifications. These include NRVBS540T3G, B540C-13-F, and CDBC540-HF.

Category B - Reduced Current Rating (3 A Rating): Parts with 3 A current rating. These include B340-13-F, STPS340S, STPS340SY, STPS3L40S, and STPS3L40SY. These are suitable only when circuit design permits operation at reduced current capacity.

Category C - Elevated Current Rating (6 A Rating): Parts with 6 A current rating. This includes SK64L-TP, suitable when higher current margin is required.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Package	Temp Range [°C]	Product Status	RoHS
LSM540JE3/TR13	Microchip Technology	40	5	520 @ 5A	DO-214AB	-55 ~ 150	Active	ROHS3
B340-13-F	Diodes Incorporated	40	3	500 @ 3A	DO-214AB	-55 ~ 125	Active	ROHS3
B540C-13-F	Diodes Incorporated	40	5	550 @ 5A	DO-214AB	-55 ~ 150	Active	ROHS3
CDBC540-HF	Comchip Technology	40	5	550 @ 5A	DO-214AB	-50 ~ 150	Active	ROHS3
NRVBS540T3G	onsemi	40	5	500 @ 5A	DO-214AB	-65 ~ 150	Active	ROHS3
SK64L-TP	Micro Commercial Co	40	6	650 @ 6A	DO-214AB	-55 ~ 150	Not For New Designs	ROHS3
STPS340S	STMicroelectronics	40	3	630 @ 3A	DO-214AB	-40 ~ 150	Active	ROHS3
STPS340SY	STMicroelectronics	40	3	630 @ 3A	DO-214AB	-40 ~ 150	Active	ROHS3
STPS3L40S	STMicroelectronics	40	3	500 @ 3A	DO-214AB	-40 ~ 150	Active	ROHS3
STPS3L40SY	STMicroelectronics	40	3	500 @ 3A	DO-214AB	-40 ~ 150	Active	ROHS3

Engineering Selection Recommendations

For Direct Replacement (5 A Current Rating):

B540C-13-F (Diodes Incorporated) is the primary substitute when 5 A current capacity is required. This part maintains identical voltage rating, current specification, and operating temperature range matching the LSM540JE3/TR13. Product status is Active with ROHS3 compliance.

NRVBS540T3G (onsemi) is an alternative 5 A substitute with extended lower temperature range (-65°C minimum) and AEC-Q101 automotive qualification. This part is suitable for applications requiring automotive-grade reliability.

CDBC540-HF (Comchip Technology) is a secondary 5 A option with forward voltage specification of 550 mV @ 5 A and operating range of -50°C to 150°C. Product status is Active with ROHS3 compliance.

For Reduced Current Applications (3 A Current Rating):

When circuit design permits operation at 3 A current capacity, multiple substitutes are available. STPS3L40S and STPS3L40SY (STMicroelectronics) offer forward voltage of 500 mV @ 3 A, matching the LSM540JE3/TR13 forward voltage characteristic. STPS3L40SY includes automotive qualification (AEC-Q101).

B340-13-F (Diodes Incorporated) provides 3 A capacity with 500 mV forward voltage and operating range of -55°C to 125°C. Product status is Active.

STPS340S and STPS340SY (STMicroelectronics) are 3 A alternatives with 630 mV forward voltage specification. STPS340SY includes automotive qualification.

For Elevated Current Applications (6 A Current Rating):

SK64L-TP (Micro Commercial Co) is rated for 6 A current capacity. This part carries "Not For New Designs" product status and should be used only when existing inventory or legacy design requirements mandate its selection.

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. NRVBS540T3G and STPS340SY/STPS3L40SY include AEC-Q101 automotive qualification for applications requiring automotive-grade components.

Frequently Asked Questions (FAQ)

Q: Can B340-13-F (3 A) be used as a direct replacement for LSM540JE3/TR13 (5 A)?

A: B340-13-F is electrically compatible only when circuit design permits operation at 3 A maximum current. The 40 V voltage rating, DO-214AB package, and Schottky technology are identical. However, the reduced current capacity limits its application to circuits designed for 3 A or lower. Forward voltage is 500 mV @ 3 A compared to 520 mV @ 5 A for the LSM540JE3/TR13.

Q: What is the difference between STPS340SY and STPS340S?

A: Both parts are rated for 40 V, 3 A with 630 mV forward voltage and DO-214AB packaging. STPS340SY includes automotive qualification (AEC-Q101) and operates over -40°C to 150°C. STPS340S operates over the same temperature range but does not carry automotive qualification. Selection depends on whether automotive-grade certification is required.

Q: Is NRVBS540T3G suitable for low-temperature applications?

A: Yes. NRVBS540T3G operates from -65°C to 150°C, providing extended low-temperature capability compared to the LSM540JE3/TR13 (-55°C to 150°C). This part includes AEC-Q101 automotive qualification and is rated for 5 A current, matching the original part specification.

Q: Why is SK64L-TP marked "Not For New Designs"?

A: SK64L-TP carries "Not For New Designs" product status, indicating the manufacturer has discontinued active development and recommends against its use in new circuit designs. This part should be used only when existing inventory or legacy design requirements mandate its selection. For new designs, B540C-13-F, NRVBS540T3G, or CDBC540-HF are preferred 5 A alternatives.

Q: Can I use a 6 A rated diode in place of a 5 A rated diode?

A: Yes. SK64L-TP is rated for 6 A and is electrically compatible with the LSM540JE3/TR13 in terms of voltage rating (40 V), package (DO-214AB), and technology (Schottky). The higher current rating provides additional margin. However, forward voltage is 650 mV @ 6 A, which is higher than the 520 mV @ 5 A specification of the LSM540JE3/TR13. Circuit design must account for this voltage difference.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use DO-214AB (SMC) surface mount package, matching the LSM540JE3/TR13. However, packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) may differ. B540C-13-F, B340-13-F, STPS340S, STPS340SY, STPS3L40S, and STPS3L40SY are supplied in Cut Tape & Digi-Reel format. LSM540JE3/TR13, CDBC540-HF, NRVBS540T3G, and SK64L-TP are supplied in Tape & Reel format. Verify packaging compatibility with assembly requirements.

Q: What is the significance of the forward voltage difference between parts?

A: Forward voltage (Vf) determines the voltage drop across the diode during conduction. LSM540JE3/TR13 specifies 520 mV @ 5 A. Substitutes range from 500 mV to 650 mV depending on current rating and manufacturer. Higher forward voltage increases power dissipation and heat generation. Circuit design must account for these differences in voltage drop calculations and thermal management.

Q: Which substitute offers the best low-temperature performance?

A: NRVBS540T3G operates from -65°C to 150°C, providing the lowest minimum operating temperature among all substitutes. This part is suitable for applications requiring extended low-temperature capability and includes AEC-Q101 automotive qualification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the LSM540JE3/TR13 environmental specifications.

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