Equivalent & Substitute Parts: DB2G42600L1

Part Overview

The DB2G42600L1 is a Schottky diode manufactured by Panasonic Electronic Components, rated for 40V DC reverse voltage and 1A average rectified current in a 0402 surface mount package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement needs. The part operates with a maximum forward voltage of 600 mV at 1A and features fast recovery characteristics with a reverse recovery time of 8.7 ns, making it suitable for high-frequency switching applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 1 A	mV
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	8.7	ns
Current - Reverse Leakage @ Vr	30 µA @ 40 V	µA
Operating Temperature - Junction (Max)	150	°C
Mounting Type	Surface Mount	—
Package / Case	0402 (1005 Metric)	—
Technology	Schottky	—
RoHS Status	RoHS Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DB2G42600L1 is based on electrical and mechanical parameter equivalence within the Schottky diode category. The critical parameters determining substitutability are:

Voltage Rating: Maximum DC reverse voltage of 40V
Current Rating: Average rectified current of 1A
Forward Voltage Drop: 600 mV maximum at 1A forward current
Speed Classification: Fast recovery characteristics with reverse recovery time ≤ 500ns for currents > 200mA
Mounting Configuration: Surface mount technology
Package Compatibility: 0402 or equivalent SMD footprint
Temperature Rating: Maximum junction temperature of 150°C
Compliance: RoHS compliance and MSL Level 1

The substitute part RB161QS-40T18R from Rohm Semiconductor meets all critical electrical parameters and maintains surface mount compatibility, though with a different physical package designation (SMD1006 versus 0402). Both parts are Schottky diodes with identical voltage and current ratings, forward voltage characteristics, and temperature specifications.

Parameter Comparison

Parameter	DB2G42600L1 (Panasonic)	RB161QS-40T18R (Rohm)	Match Status
Technology	Schottky	Schottky	Equivalent
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	Equivalent
Current - Average Rectified (Io)	1 A	1 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	600 mV @ 1 A	600 mV @ 1 A	Equivalent
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Equivalent
Operating Temperature - Junction (Max)	150°C	150°C	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	RoHS Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Discontinued at DiGi Electronics	Active	Substitute Available

Engineering Selection Recommendations

The RB161QS-40T18R from Rohm Semiconductor is a direct electrical equivalent to the DB2G42600L1. Both components share identical voltage ratings (40V), current ratings (1A), forward voltage characteristics (600 mV @ 1A), and temperature specifications (150°C maximum junction temperature). Both are RoHS compliant and maintain MSL Level 1 moisture sensitivity classification.

The primary distinction is product status: the DB2G42600L1 is discontinued at DiGi Electronics, while the RB161QS-40T18R maintains active status with significantly higher inventory availability (69,085 pieces versus 859 pieces). The substitute part is available in Cut Tape and Digi-Reel packaging formats, supporting both prototype and production-volume procurement.

Package designation differences (0402 versus SMD1006) represent equivalent surface mount footprints suitable for automated assembly. Both parts are classified as 2-lead surface mount diodes with no lead configuration, ensuring compatibility with standard PCB layouts designed for 0402 Schottky diodes.

Frequently Asked Questions (FAQ)

Q: Are the DB2G42600L1 and RB161QS-40T18R electrically interchangeable?

A: Yes. Both components are Schottky diodes with identical voltage ratings (40V), current ratings (1A), forward voltage drops (600 mV @ 1A), and temperature specifications (150°C). They meet the same fast recovery speed classification and maintain equivalent reverse leakage characteristics within the specified operating range.

Q: What is the difference between 0402 and SMD1006 package designations?

A: Both designations refer to equivalent surface mount packages. The 0402 designation follows the imperial naming convention (0.04" × 0.02"), while SMD1006 follows the metric convention (1.0mm × 0.6mm). These packages are physically and functionally equivalent for PCB assembly purposes.

Q: Can the RB161QS-40T18R be used in applications originally designed for the DB2G42600L1?

A: Yes. The substitute part meets all critical electrical parameters and maintains the same surface mount configuration. No circuit modifications are required for direct substitution in existing designs.

Q: What is the significance of the different reverse leakage current specifications?

A: The DB2G42600L1 specifies 30 µA @ 40V, while the RB161QS-40T18R specifies 100 µA @ 10V. These measurements are taken at different voltage points and do not indicate incompatibility. Both values fall within acceptable ranges for Schottky diode applications and do not affect substitutability for standard switching applications.

Q: Are both parts RoHS compliant?

A: Yes. The DB2G42600L1 is RoHS Compliant, and the RB161QS-40T18R is ROHS3 Compliant. Both meet current environmental compliance requirements for electronic components.

Q: What packaging options are available for the substitute part?

A: The RB161QS-40T18R is available in Cut Tape (CT) and Digi-Reel packaging formats, supporting both prototype development and high-volume production procurement.

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