Equivalent & Substitute Parts for RB540SM-40FHT2R

Part Overview

RB540SM-40FHT2R from Rohm Semiconductor is a Schottky diode, rectifier, specified for 40 V reverse voltage and 200mA average rectified current, in a surface mount EMD2 (SOD-523/SC-79) package. This part is currently classified as "Not For New Designs." This status necessitates the evaluation and selection of alternative models with matching or compatible electrical and mechanical characteristics for ongoing and future production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	RB540SM-40FHT2R
Category	Diodes, Rectifiers
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	200 mA
Voltage - Forward (Vf) (Max) @ If	710 mV @ 100 mA
Current - Reverse Leakage @ Vr	15 µA @ 40 V
Package / Case	SC-79, SOD-523
Supplier Device Package	EMD2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Qualification	AEC-Q101
Operating Temperature - Junction	150°C (Max)
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitute selection for RB540SM-40FHT2R is strictly governed by the following key parameters: Technology (Schottky), maximum DC reverse voltage (40 V), average rectified current (≥ 200 mA), maximum forward voltage, reverse leakage current, package compatibility (SOD-523/SC-79), compliance standards (RoHS3, REACH), and operating temperature range. Only alternatives matching these criteria are valid substitutes in this diode rectifier product category.

Parameter Comparison

Parameter	RB540SM-40FHT2R	BAT54KFILM	CMOSH-4E TR PBFREE	CMOSH2-4L TR PBFREE	NSR0340V2T5G
Technology	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V	40 V
Current - Average Rectified (Io)	200 mA	300 mA	200 mA	200 mA	250 mA
Voltage - Forward (Vf) (Max) @ If	710 mV @ 100 mA	900 mV @ 100 mA	1 V @ 200 mA	500 mV @ 200 mA	510 mV @ 200 mA
Current - Reverse Leakage @ Vr	15 µA @ 40 V	1 µA @ 30 V	500 nA @ 25 V	50 µA @ 20 V	6 µA @ 40 V
Package / Case	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523
Supplier Device Package	EMD2	SOD-523	SOD-523	SOD-523	SOD-523
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Operating Temperature - Junction	150°C (Max)	-40°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C
Product Status	Not For New Designs	Active	Active	Active	Active

Engineering Selection Recommendations

Given the "Not For New Designs" status of RB540SM-40FHT2R, selection of substitute diodes should prioritize those with "Active" product status. All substitutes listed (BAT54KFILM, CMOSH-4E TR PBFREE, CMOSH2-4L TR PBFREE, NSR0340V2T5G) meet RoHS3 compliance, REACH unaffected status, and feature MSL 1 (Unlimited), as required. All options utilize Schottky technology with appropriate voltage and current ratings and are available in the specified SOD-523/SC-79 packages.

Frequently Asked Questions (FAQ)

Q1: What electrical parameters must match to substitute RB540SM-40FHT2R in a design?
A: Key criteria are Schottky technology, 40 V maximum reverse voltage, average rectified current of 200 mA or higher, and similar maximum forward voltage and reverse leakage current values.

Q2: Are package/case form factors the same among all substitutes listed?
A: Yes, all substitutes share compatibility with SOD-523/SC-79 surface mount packages.

Q3: Is automotive qualification (AEC-Q101) available for all alternatives?
A: Only RB540SM-40FHT2R specifies AEC-Q101 qualification in the provided data. Substitute parts do not specify this qualification.

Q4: What compliance standards apply to the chosen substitutes?
A: All substitutes are RoHS3 compliant, REACH unaffected, and have Moisture Sensitivity Level (MSL) 1 (Unlimited).

Q5: What should be considered regarding product status when selecting a substitute?
A: Priority should be given to parts with an "Active" product status for ongoing and future designs, ensuring long-term availability.

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