RB751V40T1 Equivalent & Substitute Parts

Part Overview

The RB751V40T1 is a Schottky diode manufactured by onsemi, rated for 1 mA average rectified current at 40 V DC reverse voltage in a SOD-323 surface mount package. This component is classified as obsolete, indicating discontinuation from the manufacturer. Locating equivalent and substitute parts is necessary to support ongoing production requirements, maintenance operations, and design updates for applications utilizing this diode.

Key Parameters

Parameter	RB751V40T1 Value
Manufacturer	onsemi
Category	Diodes, Rectifiers
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	1 mA
Package / Case	SOD-323
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RB751V40T1 is determined by the following critical parameters:

Voltage Rating Compatibility: The substitute part must support a DC reverse voltage (Vr) rating equal to or greater than 40 V to maintain circuit protection and reliability.

Current Rating Compatibility: The substitute part must support an average rectified current (Io) equal to or greater than 1 mA to handle the application's current demands.

Package Compatibility: All substitute parts must use the SOD-323 surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Technology Consistency: All substitute parts utilize Schottky diode technology, maintaining the same forward voltage characteristics and switching speed performance.

Compliance Requirements: Substitute parts must meet RoHS3 compliance to satisfy modern regulatory requirements, as the original part is RoHS non-compliant.

Substitute parts are grouped into two categories based on voltage and current ratings:

Group 1 (30 V Rated): Parts with 30 V reverse voltage rating. These parts are suitable only if the application circuit operates at or below 30 V maximum.

Group 2 (40 V Rated): Parts with 40 V reverse voltage rating. These parts provide direct voltage compatibility with the original RB751V40T1 specification.

Parameter Comparison

Parameter	RB751V40T1	RB751V40T1G	1PS76SB10,115	BAT5403WE6327HTSA1	RB751V-40-TP	RB751V40,115	SD101CWS-E3-08
Manufacturer	onsemi	onsemi	Nexperia USA Inc.	Infineon Technologies	Micro Commercial Co	Nexperia USA Inc.	Vishay General Semiconductor
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V	30 V	30 V	30 V	30 V	40 V	40 V
Current - Average Rectified (Io)	1 mA	30 mA	200 mA	200 mA	30 mA	120 mA	30 mA
Voltage - Forward (Vf) (Max) @ If	Not provided	370 mV @ 1 mA	800 mV @ 100 mA	800 mV @ 100 mA	370 mV @ 1 mA	370 mV @ 1 mA	900 mV @ 15 mA
Package / Case	SOD-323	SOD-323	SOD-323	SOD-323	SOD-323	SOD-323	SOD-323
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Operating Temperature - Junction (Max)	Not provided	150°C	125°C	150°C	125°C	150°C	125°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Voltage and Current Match (40 V, ≥1 mA):

RB751V40,115 (Nexperia USA Inc.) provides the closest electrical match with 40 V reverse voltage rating and 120 mA average rectified current. This part is ROHS3 compliant and carries active product status, ensuring long-term availability and supply chain stability. Operating temperature maximum of 150°C supports extended thermal performance.

SD101CWS-E3-08 (Vishay General Semiconductor) also meets the 40 V voltage requirement with 30 mA current rating. This part is ROHS3 compliant and active. Operating temperature maximum of 125°C is suitable for standard industrial applications.

Voltage Derating Consideration (30 V Rated):

RB751V40T1G (onsemi) provides 30 V reverse voltage with 30 mA current capacity. This part is ROHS3 compliant and active. Selection of this part requires circuit voltage confirmation to ensure operation does not exceed 30 V maximum.

RB751V-40-TP (Micro Commercial Co) offers 30 V reverse voltage with 30 mA current capacity. This part is ROHS3 compliant and active, with 125°C maximum operating temperature.

1PS76SB10,115 (Nexperia USA Inc.) provides 30 V reverse voltage with 200 mA current capacity and carries AEC-Q101 automotive qualification. This part is ROHS3 compliant and active.

BAT5403WE6327HTSA1 (Infineon Technologies) offers 30 V reverse voltage with 200 mA current capacity. This part is ROHS3 compliant and active, with 150°C maximum operating temperature and 5 ns reverse recovery time specification.

Compliance Status:

All substitute parts listed are ROHS3 compliant, addressing the regulatory limitation of the obsolete RB751V40T1. All substitute parts carry active product status, ensuring continued manufacturing and supply availability.

Frequently Asked Questions (FAQ)

Q: Can I use a 30 V rated substitute in place of the 40 V RB751V40T1?

A: A 30 V rated substitute can be used only if the application circuit operates at or below 30 V maximum. The original 40 V rating provides margin for transient overvoltages and circuit protection. Use of a lower voltage-rated part in a 40 V circuit creates risk of diode failure and circuit malfunction.

Q: What is the significance of the current rating difference between the RB751V40T1 (1 mA) and substitute parts (30 mA to 200 mA)?

A: Substitute parts with higher current ratings are fully compatible with the original 1 mA application. The higher current rating indicates the part can safely handle greater current without thermal stress. The application will draw only the current required by the circuit, regardless of the part's maximum rating.

Q: Are all substitute parts in the same SOD-323 package?

A: Yes, all substitute parts listed use the SOD-323 surface mount package. This ensures mechanical compatibility with existing PCB layouts, assembly equipment, and soldering processes without design modification.

Q: What is the difference between RB751V40T1G and RB751V-40-TP?

A: Both parts are 30 V rated Schottky diodes with 30 mA current capacity in SOD-323 packages. RB751V40T1G is manufactured by onsemi with 150°C maximum operating temperature. RB751V-40-TP is manufactured by Micro Commercial Co with 125°C maximum operating temperature. Selection depends on thermal requirements and preferred supplier.

Q: Why is RoHS3 compliance important for substitute selection?

A: The original RB751V40T1 is RoHS non-compliant. Modern manufacturing and procurement standards require RoHS3 compliance to meet environmental regulations and customer requirements. All listed substitute parts are ROHS3 compliant, ensuring regulatory alignment.

Q: Can I use BAT5403WE6327HTSA1 or 1PS76SB10,115 with their higher 200 mA current ratings?

A: Yes, both parts are fully compatible with the original 1 mA application. The higher current rating indicates greater current handling capacity. The application circuit will operate at its required current level, and the part will not be stressed by the excess capacity.

Q: What does "Active" product status mean for substitute parts?

A: Active product status indicates the part is currently manufactured and available from the supplier. This ensures long-term supply chain stability, availability of technical documentation, and continued manufacturing support, unlike the obsolete RB751V40T1.

Q: Are there packaging format differences between substitute parts?

A: Substitute parts are available in Cut Tape (CT) & Digi-Reel or Tape & Reel (TR) packaging formats. Both formats are compatible with standard surface mount assembly processes. Selection depends on production volume and assembly equipment compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message