MBR140SFT1 Equivalent & Substitute Parts

Part Overview

The MBR140SFT1 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. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and legacy system support.

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
Mounting Type	Surface Mount
Package / Case	SOD-123F
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Schottky

Substitute Part Grouping Explanation

Substitute parts for the MBR140SFT1 are grouped into two categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalents (onsemi): Parts that maintain identical electrical specifications and are manufactured by the original supplier. These parts share the same base product number (MBR140) and differ only in packaging configuration or product status.

Parametric Equivalents (onsemi Automotive Grade): Parts that meet all electrical specifications but include automotive-grade qualification (AEC-Q101). These use the NRVB140 base product number and are suitable for applications requiring automotive compliance.

Cross-Manufacturer Equivalents: Parts from alternative manufacturers (Comchip Technology, Nexperia USA Inc., Toshiba Semiconductor and Storage, Diodes Incorporated) that match the core electrical parameters: 40 V reverse voltage, 1 A average rectified current, fast recovery speed, and surface mount packaging.

Similar Parts (Lower Current Rating): Parts that share the 40 V voltage rating and SOD-123F package but with reduced current ratings (120 mA or 500 mA). These are suitable only for applications with lower current requirements.

Substitution is determined by matching the following critical parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 1 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount
Operating Temperature Range: -55°C ~ 125°C minimum

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Ir @ Vr	Package	Product Status	RoHS Status
MBR140SFT1	onsemi	40 V	1 A	550 mV @ 1 A	Fast Recovery ≤ 500ns	500 µA @ 40 V	SOD-123F	Obsolete	RoHS non-compliant
MBR140SFT1G	onsemi	40 V	1 A	550 mV @ 1 A	Fast Recovery ≤ 500ns	500 µA @ 40 V	SOD-123F	Active	ROHS3 Compliant
MBR140SFT3G	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
CDBMTS140-HF	Comchip Technology	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500ns	500 µA @ 40 V	SOD-123S	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 and Storage	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
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

Primary Recommendation - Direct Equivalent: MBR140SFT1G or MBR140SFT3G are the preferred direct substitutes. Both are manufactured by onsemi, maintain identical electrical specifications to the MBR140SFT1, and are in active product status. MBR140SFT1G is supplied in Cut Tape (CT) & Digi-Reel® packaging, while MBR140SFT3G is supplied in Tape & Reel (TR) packaging. Both are ROHS3 compliant, addressing the RoHS non-compliance of the obsolete part.

Automotive-Grade Alternative: NRVB140SFT1G and NRVB140SFT3G are onsemi automotive-grade equivalents qualified to AEC-Q101. These parts are suitable for applications requiring automotive compliance and maintain identical electrical specifications. NRVB140SFT1G is supplied in Cut Tape (CT) & Digi-Reel® packaging, while NRVB140SFT3G is supplied in standard packaging.

Cross-Manufacturer Alternatives: CRS04(TE85L,Q,M) from Toshiba Semiconductor and Storage meets all electrical specifications with slightly lower reverse leakage current (100 µA vs. 500 µA @ 40 V) and is available in high inventory. DFLS140L-7 from Diodes Incorporated uses an alternative package format (POWERDI®123) but maintains electrical compatibility and is available in high inventory.

Comchip Technology parts CDBMTS140-HF and CDBMT140-HF are electrically compatible but use alternative package variants (SOD-123S and SOD-123H respectively) and should be selected only when package compatibility is confirmed.

Not Recommended for Direct Substitution: BAS40H,115 and PMEG4005EH,115 have reduced current ratings (120 mA and 500 mA respectively) and are suitable only for applications with lower current requirements than the original 1 A specification.

Frequently Asked Questions (FAQ)

Q: Can MBR140SFT1G be used as a direct replacement for MBR140SFT1? A: Yes. MBR140SFT1G is a direct equivalent manufactured by onsemi with identical electrical specifications (40 V, 1 A, 550 mV forward voltage, fast recovery speed). The primary differences are active product status and ROHS3 compliance. Packaging is Cut Tape (CT) & Digi-Reel®.

Q: What is the difference between MBR140SFT1G and MBR140SFT3G? A: Both parts are electrically identical and manufactured by onsemi. The difference is in packaging: MBR140SFT1G is supplied in Cut Tape (CT) & Digi-Reel® format, while MBR140SFT3G is supplied in Tape & Reel (TR) format. Selection depends on assembly line requirements.

Q: Are NRVB140SFT1G and NRVB140SFT3G suitable replacements? A: Yes. These onsemi automotive-grade parts maintain identical electrical specifications and are qualified to AEC-Q101. They are suitable for applications requiring automotive compliance. Like the standard MBR140 variants, they differ only in packaging format.

Q: Can I use CRS04(TE85L,Q,M) from Toshiba as a substitute? A: Yes. CRS04(TE85L,Q,M) meets all critical electrical specifications (40 V, 1 A, fast recovery). It has lower reverse leakage current (100 µA vs. 500 µA @ 40 V), which is advantageous. The package is SOD-123F, compatible with the original. High inventory availability supports production needs.

Q: What is the difference between SOD-123F and SOD-123S packages? A: SOD-123F and SOD-123S are both surface mount packages for small signal diodes but have different physical dimensions and pin configurations. CDBMTS140-HF uses SOD-123S, while most other equivalents use SOD-123F. Confirm PCB footprint compatibility before selection.

Q: Is DFLS140L-7 compatible with the original MBR140SFT1 footprint? A: DFLS140L-7 uses the POWERDI®123 package, which differs from the SOD-123F package of the original part. While electrically equivalent, PCB footprint compatibility must be verified before substitution.

Q: Why is the reverse leakage current different across equivalent parts? A: Reverse leakage current varies based on semiconductor manufacturing process and die design, even when voltage and current ratings are identical. Lower leakage (100 µA vs. 500 µA) is generally advantageous for circuit performance but does not prevent substitution if the original specification is met.

Q: Can BAS40H,115 replace MBR140SFT1? A: No. BAS40H,115 has a maximum average rectified current of 120 mA, significantly lower than the 1 A requirement of MBR140SFT1. It is suitable only for applications with lower current demands.

Q: What does ROHS3 compliance mean for this part? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. The original MBR140SFT1 is RoHS non-compliant. All active equivalent parts listed are ROHS3 compliant, supporting modern manufacturing and environmental standards.

Q: Are there inventory considerations when selecting a substitute? A: Yes. MBR140SFT1G has 50,300 pieces in stock, MBR140SFT3G has 15,634 pieces, and CRS04(TE85L,Q,M) has 24,916 pieces. DFLS140L-7 has 50,400 pieces available. Inventory levels support production requirements for most applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message