SR302-TP Equivalent & Substitute Parts

Part Overview

The SR302-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 20 V DC reverse voltage and 3 A average rectified current in a through-hole DO-201AD axial package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design and procurement requirements. The SR302-TP serves as an interface diode in applications requiring fast recovery characteristics and low forward voltage drop.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 20 V
Capacitance @ Vr, F	180 pF @ 4 V, 1 MHz
Package / Case	DO-201AD, Axial
Mounting Type	Through Hole
Operating Temperature - Junction	-50°C ~ 125°C
Technology	Schottky

Substitute Part Grouping Explanation

Substitution of the SR302-TP is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Technology: Schottky rectifier diode
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole
Current - Average Rectified (Io): 3 A (minimum requirement)
Voltage - Forward (Vf) (Max) @ If: 500 mV @ 3 A (maximum acceptable)
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Operating Temperature - Junction: -50°C ~ 125°C

Substitution Logic: The SR304-TP qualifies as a direct substitute because it maintains identical performance in current rating, forward voltage, recovery speed, capacitance, and thermal operating range. The SR304-TP provides an elevated reverse voltage rating of 40 V, which exceeds the SR302-TP requirement of 20 V. This higher voltage rating is compatible with applications designed for the SR302-TP, as the component operates within the same electrical envelope for all other critical parameters. The identical package, mounting configuration, and Schottky technology ensure mechanical and functional interchangeability.

Parameter Comparison

Parameter	SR302-TP (Obsolete)	SR304-TP (Active)	Compatibility
Voltage - DC Reverse (Vr) (Max)	20 V	40 V	Compatible - Higher rating
Current - Average Rectified (Io)	3 A	3 A	Identical
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	500 mV @ 3 A	Identical
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Identical
Current - Reverse Leakage @ Vr	500 µA @ 20 V	500 µA @ 40 V	Compatible - Measured at higher voltage
Capacitance @ Vr, F	180 pF @ 4 V, 1 MHz	180 pF @ 4 V, 1 MHz	Identical
Package / Case	DO-201AD, Axial	DO-201AD, Axial	Identical
Mounting Type	Through Hole	Through Hole	Identical
Operating Temperature - Junction	-50°C ~ 125°C	-50°C ~ 125°C	Identical
Technology	Schottky	Schottky	Identical
Product Status	Obsolete	Active	Substitute is active
REACH Status	REACH Unaffected	REACH Unaffected	Identical
ECCN	EAR99	EAR99	Identical

Engineering Selection Recommendations

The SR304-TP is the designated substitute for the obsolete SR302-TP. Selection of the SR304-TP is based on the following factors:

Product Status: The SR304-TP maintains active product status with current manufacturing and distribution, ensuring long-term availability and supply chain continuity. The SR302-TP is classified as obsolete, making the SR304-TP the appropriate replacement for new designs and ongoing production requirements.

Regulatory Compliance: Both components maintain identical REACH and ECCN classifications (REACH Unaffected, EAR99), ensuring equivalent compliance posture for export and environmental regulations.

Electrical Interchangeability: The SR304-TP operates within the identical electrical specifications for current, forward voltage, recovery speed, and capacitance. The elevated reverse voltage rating of 40 V provides additional design margin without introducing incompatibility with existing circuit designs rated for 20 V operation.

Physical Compatibility: Identical DO-201AD axial package and through-hole mounting configuration enable direct mechanical substitution without PCB redesign or assembly process modification.

Frequently Asked Questions (FAQ)

Q: Can the SR304-TP be used as a direct replacement for the SR302-TP in existing designs?

A: Yes. The SR304-TP is electrically and mechanically compatible with the SR302-TP. Both components share identical current ratings, forward voltage characteristics, recovery speed, and package configuration. The higher reverse voltage rating of the SR304-TP (40 V versus 20 V) does not create incompatibility with circuits designed for the SR302-TP.

Q: What is the primary difference between the SR302-TP and SR304-TP?

A: The primary difference is the maximum DC reverse voltage rating. The SR302-TP is rated for 20 V, while the SR304-TP is rated for 40 V. All other electrical parameters, including current capacity, forward voltage drop, and recovery speed, are identical.

Q: Are there any package or mounting differences between these parts?

A: No. Both the SR302-TP and SR304-TP use the DO-201AD axial package with through-hole mounting. No PCB layout modifications or assembly process changes are required for substitution.

Q: Why is the SR302-TP classified as obsolete?

A: The SR302-TP is listed as obsolete by the manufacturer. The SR304-TP serves as the active equivalent, providing the same functional performance with current manufacturing support.

Q: What compliance certifications apply to the SR304-TP?

A: The SR304-TP maintains REACH Unaffected status and EAR99 export classification, identical to the SR302-TP. No additional compliance considerations arise from substitution.

Q: Can the SR304-TP be used in applications requiring lower voltage ratings?

A: Yes. The SR304-TP operates correctly in applications designed for 20 V reverse voltage operation. The higher voltage rating provides additional safety margin without affecting circuit performance.

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