MBR140SFT3 Equivalent & Substitute Parts

Part Overview

The MBR140SFT3 is a Schottky rectifier diode manufactured by onsemi, rated for 40 V DC reverse voltage and 1 A average rectified current in a surface mount SOD-123FL package. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs. Active alternatives with identical or compatible electrical and mechanical specifications are available from multiple manufacturers.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 40 V
Package / Case	SOD-123F
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Schottky

Substitute Part Grouping Explanation

Substitution of the MBR140SFT3 is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 1 A
Technology: Schottky
Package / Case: SOD-123F or compatible surface mount package
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Direct Manufacturer Equivalents maintain identical electrical specifications and are manufactured by onsemi. These parts differ only in packaging format (Tape & Reel vs. Cut Tape) or product status (Active vs. Obsolete).

Parametric Equivalents from onsemi provide identical electrical performance with additional qualifications such as AEC-Q101 automotive certification, suitable for applications requiring automotive-grade components.

Similar Parts from alternative manufacturers (Nexperia, Comchip, Toshiba, Diodes Incorporated) meet the core electrical requirements of 40 V, 1 A Schottky rectification with fast recovery characteristics. Package variations (SOD-123H, PowerDI™ 123, S-FLAT) remain mechanically compatible with standard SOD-123F footprints in most applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ If	Speed	Ir @ Vr	Package	Product Status	RoHS
MBR140SFT3	onsemi	40 V	1 A	550 mV @ 1 A	Fast Recovery ≤ 500ns	500 µA @ 40 V	SOD-123F	Obsolete	Non-compliant
MBR140SFT3G	onsemi	40 V	1 A	550 mV @ 1 A	Fast Recovery ≤ 500ns	500 µA @ 40 V	SOD-123F	Active	ROHS3 Compliant
MBR140SFT1G	onsemi	40 V	1 A	550 mV @ 1 A	Fast Recovery ≤ 500ns	500 µA @ 40 V	SOD-123F	Active	ROHS3 Compliant
NRVB140SFT1G	onsemi	40 V	1 A	550 mV @ 1 A	Fast Recovery ≤ 500ns	500 µA @ 40 V	SOD-123F	Active	ROHS3 Compliant
NRVB140SFT3G	onsemi	40 V	1 A	550 mV @ 1 A	Fast Recovery ≤ 500ns	500 µA @ 40 V	SOD-123F	Active	ROHS3 Compliant
CDBMT140-HF	Comchip Technology	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500ns	500 µA @ 40 V	SOD-123H	Active	ROHS3 Compliant
CRS04(TE85L,Q,M)	Toshiba Semiconductor	40 V	1 A	510 mV @ 1 A	Fast Recovery ≤ 500ns	100 µA @ 40 V	SOD-123F	Active	ROHS3 Compliant
DFLS140L-7	Diodes Incorporated	40 V	1 A	550 mV @ 1 A	Fast Recovery ≤ 500ns	100 µA @ 40 V	PowerDI™ 123	Active	ROHS3 Compliant
PMEG4010CEH,115	Nexperia USA Inc.	40 V	1 A	570 mV @ 1 A	Fast Recovery ≤ 500ns	50 µA @ 40 V	SOD-123F	Active	ROHS3 Compliant
BAS40H,115	Nexperia USA Inc.	40 V	120 mA	1 V @ 40 mA	Small Signal ≤ 200mA	10 µA @ 40 V	SOD-123F	Active	ROHS3 Compliant
PMEG4005EH,115	Nexperia USA Inc.	40 V	500 mA	470 mV @ 500 mA	Fast Recovery ≤ 500ns	100 µA @ 40 V	SOD-123F	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Specifications):

MBR140SFT3G, MBR140SFT1G, NRVB140SFT1G, and NRVB140SFT3G are direct functional equivalents manufactured by onsemi with 40 V, 1 A ratings and identical forward voltage characteristics. All are ROHS3 compliant and carry Active product status. NRVB140 variants include AEC-Q101 automotive qualification, suitable for automotive applications. Selection between these parts depends on packaging format requirements (Tape & Reel vs. Cut Tape) and automotive certification needs.

Cross-Manufacturer Equivalents (Identical Electrical Specifications, Different Packaging):

CDBMT140-HF (Comchip), CRS04(TE85L,Q,M) (Toshiba), DFLS140L-7 (Diodes Incorporated), and PMEG4010CEH,115 (Nexperia) provide 40 V, 1 A Schottky rectification with fast recovery characteristics. These parts are ROHS3 compliant and Active. Package variations include SOD-123H, S-FLAT, PowerDI™ 123, and SOD-123F. Forward voltage specifications range from 500 mV to 570 mV at 1 A, within acceptable tolerance for most applications. Reverse leakage current varies from 50 µA to 500 µA at 40 V.

Current-Limited Alternatives (Reduced Current Rating):

PMEG4005EH,115 (500 mA) and BAS40H,115 (120 mA) are suitable only for applications where the required current does not exceed their respective ratings. These parts maintain 40 V reverse voltage rating and are ROHS3 compliant. BAS40H,115 is classified as small signal with different speed characteristics and should be selected only when current requirements are confirmed below 120 mA.

Frequently Asked Questions (FAQ)

Q: Can MBR140SFT3G directly replace MBR140SFT3 without PCB modification?

A: Yes. MBR140SFT3G is electrically and mechanically identical to MBR140SFT3, both using SOD-123F package. The primary difference is product status (Active vs. Obsolete) and RoHS compliance. No PCB layout changes are required.

Q: What is the difference between MBR140SFT1G and MBR140SFT3G?

A: Both parts are electrically identical with 40 V, 1 A specifications. The difference is packaging format: MBR140SFT1G is supplied in Cut Tape & Digi-Reel format, while MBR140SFT3G is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Are NRVB140 variants suitable for automotive applications?

A: Yes. NRVB140SFT1G and NRVB140SFT3G carry AEC-Q101 automotive qualification and are ROHS3 compliant. These parts are appropriate for automotive-grade designs requiring certified components.

Q: Can CDBMT140-HF replace MBR140SFT3 despite different package designation (SOD-123H vs. SOD-123F)?

A: CDBMT140-HF uses SOD-123H package while MBR140SFT3 uses SOD-123F. Both are mechanically compatible with standard SOD-123F PCB footprints. Electrical specifications are equivalent: 40 V, 1 A, fast recovery. Verify PCB layout compatibility before substitution.

Q: What is the significance of the forward voltage difference between PMEG4010CEH,115 (570 mV) and MBR140SFT3 (550 mV)?

A: The 20 mV difference at 1 A is within typical manufacturing tolerance for Schottky diodes. Both parts meet the 40 V, 1 A specification. This variation does not affect circuit functionality in standard rectification applications but should be considered in precision analog circuits where forward voltage drop is critical.

Q: Why is BAS40H,115 listed as a similar part if its current rating is only 120 mA?

A: BAS40H,115 shares the 40 V reverse voltage rating and SOD-123F package with MBR140SFT3. However, its 120 mA current rating is significantly lower than the 1 A requirement of MBR140SFT3. This part is suitable only for applications where actual circuit current does not exceed 120 mA. It is not a general replacement.

Q: Are all listed substitute parts ROHS3 compliant?

A: All substitute parts listed carry ROHS3 compliance status. The original MBR140SFT3 is RoHS non-compliant. Compliance is a key advantage of active alternatives for new designs and procurement.

Q: What packaging options are available for 40 V, 1 A Schottky rectifiers?

A: Available packages include SOD-123F (standard), SOD-123H (Comchip variant), S-FLAT 1.6x3.5 (Toshiba), and PowerDI™ 123 (Diodes Incorporated). All maintain mechanical compatibility with standard SOD-123F PCB footprints. Selection depends on thermal performance requirements and assembly equipment capabilities.

Q: Can DFLS140L-7 (PowerDI™ 123) be used in place of MBR140SFT3 for improved thermal performance?

A: DFLS140L-7 provides identical 40 V, 1 A electrical specifications with PowerDI™ 123 package, which offers improved thermal characteristics compared to standard SOD-123F. This substitution is suitable when thermal management is a design consideration. Verify PCB layout compatibility with the PowerDI™ 123 footprint.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message