SR305-TP Equivalent & Substitute Parts

Part Overview

The SR305-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 50V DC reverse voltage and 3A average rectified current in a DO-201AD axial through-hole package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where original components are no longer readily available or where design flexibility permits alternative sourcing.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	720 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	1	mA @ 50 V
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-55°C ~ 125°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SR305-TP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 50V
Current - Average Rectified (Io): 3A
Technology: Schottky
Mounting Type: Through Hole
Package / Case: DO-201AD, Axial

Allowable Variation Ranges:

Voltage - Forward (Vf) (Max) @ If: Substitute values must not exceed the application's forward voltage tolerance; the SR305-TP specifies 720 mV @ 3 A
Current - Reverse Leakage @ Vr: Substitute values must not exceed the application's leakage current tolerance; the SR305-TP specifies 1 mA @ 50 V
Operating Temperature - Junction: Substitute parts may have equal or extended temperature ranges

The SR305 A0G manufactured by Taiwan Semiconductor Corporation meets all mandatory matching criteria and is therefore classified as a direct substitute for the SR305-TP.

Parameter Comparison

Parameter	SR305-TP (Micro Commercial Co)	SR305 A0G (Taiwan Semiconductor Corporation)	Compatibility
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	Equivalent
Current - Average Rectified (Io)	3 A	3 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	720 mV @ 3 A	700 mV @ 3 A	Substitute Superior
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Equivalent
Current - Reverse Leakage @ Vr	1 mA @ 50 V	500 µA @ 50 V	Substitute Superior
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	DO-201AD, Axial	DO-201AD, Axial	Equivalent
Operating Temperature - Junction	-55°C ~ 125°C	-55°C ~ 150°C	Substitute Extended
Technology	Schottky	Schottky	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent

Engineering Selection Recommendations

SR305 A0G (Taiwan Semiconductor Corporation) is the qualified substitute for SR305-TP applications.

Selection Basis:

The SR305 A0G maintains electrical and mechanical equivalence across all mandatory parameters: 50V reverse voltage rating, 3A average rectified current, Schottky technology, fast recovery speed characteristic, and DO-201AD axial through-hole package. Both components are ROHS3 compliant and REACH unaffected, satisfying regulatory requirements.

The SR305 A0G demonstrates performance advantages over the SR305-TP in forward voltage drop (700 mV versus 720 mV at 3A) and reverse leakage current (500 µA versus 1 mA at 50V), resulting in lower power dissipation and improved circuit efficiency. The extended operating temperature range (-55°C to 150°C versus -55°C to 125°C) provides additional thermal margin for demanding applications.

The SR305-TP is designated "Not For New Designs," whereas the SR305 A0G maintains "Active" product status, ensuring continued availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can SR305 A0G be used as a direct replacement for SR305-TP in existing circuits?

A: Yes. The SR305 A0G is electrically and mechanically equivalent to the SR305-TP across all critical parameters: 50V reverse voltage, 3A average rectified current, Schottky technology, fast recovery speed, and DO-201AD axial package. No circuit modifications are required.

Q: What are the performance differences between SR305-TP and SR305 A0G?

A: The SR305 A0G exhibits lower forward voltage drop (700 mV versus 720 mV at 3A) and lower reverse leakage current (500 µA versus 1 mA at 50V). These characteristics result in reduced power dissipation and improved efficiency. The SR305 A0G also supports an extended operating temperature range to 150°C compared to 125°C for the SR305-TP.

Q: Are both parts physically identical?

A: Yes. Both the SR305-TP and SR305 A0G use the DO-201AD axial through-hole package, ensuring identical physical dimensions, lead spacing, and mounting compatibility on printed circuit boards.

Q: Why is the SR305-TP marked "Not For New Designs"?

A: This designation indicates the SR305-TP has reached end-of-life status and is no longer recommended for new product development. The SR305 A0G, with "Active" product status, is the appropriate choice for new designs and ongoing production.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the SR305-TP and SR305 A0G are ROHS3 compliant and REACH unaffected, satisfying current environmental and regulatory requirements.

Q: What is the difference in reverse leakage current between these parts?

A: The SR305-TP specifies 1 mA reverse leakage at 50V, while the SR305 A0G specifies 500 µA at 50V. The lower leakage current in the SR305 A0G reduces standby power consumption and improves circuit performance in applications sensitive to leakage current.

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