Equivalent & Substitute Parts for SR103

Part Overview

The SR103 from Taiwan Semiconductor Corporation is a Schottky diode rectifier categorized under diodes, rectifiers, with a maximum DC reverse voltage of 30 V, an average rectified current of 1A, and a forward voltage maximum of 550 mV at 1A. The device is housed in a DO-204AL (DO-41) through-hole package and is RoHS3 compliant. The part is currently active with inventory available. Finding alternative models is necessary for production flexibility, inventory management, and risk mitigation in supply chain scenarios that require backup or drop-in replacements of identical or closely matched Schottky rectifiers.

Key Parameters

Parameter	SR103 Value
Manufacturer	Taiwan Semiconductor Corporation
Category	Diodes, Rectifiers
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	1A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A
Speed	Fast Recovery =< 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 30 V
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Supplier Device Package	DO-204AL (DO-41)
Operating Temperature - Junction	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for SR103 must meet or closely match the following key parameters for valid substitution:

Technology (Schottky)
Maximum DC Reverse Voltage (30 V)
Average Rectified Current (1A)
Maximum Forward Voltage (550 mV @ 1A)
Reverse Leakage Current at Maximum Reverse Voltage
Package type (DO-204AL, DO-41)
Mounting type (Through Hole)
Operating temperature range
RoHS compliance

All substitutes listed have been selected strictly based on these electrical and mechanical criteria. Only parts matching these key parameters have been included.

Parameter Comparison

Parameter	SR103	10DQ03	1N5818-TP	1N5818_R2_00001
Manufacturer	Taiwan Semiconductor Corporation	SMC Diode Solutions	Micro Commercial Co	Panjit International Inc.
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	30 V	30 V	30 V	30 V
Current - Average Rectified (Io)	1A	1A	1A	1A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	550 mV @ 1 A	550 mV @ 1 A	550 mV @ 1 A
Speed	Fast Recovery =< 500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 30 V	500 µA @ 30 V	1 mA @ 30 V	200 µA @ 30 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 125°C	-65°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are active and RoHS3 compliant. The product statuses for SR103, 10DQ03, 1N5818-TP, and 1N5818_R2_00001 are specified as active, allowing for current and ongoing procurement. RoHS3 compliance is consistent across all parts, supporting use in environments requiring lead-free and hazardous substance-free components. Where REACH status or moisture sensitivity level data is supplied, it matches or exceeds typical requirements for axial Schottky diodes in this category.

Frequently Asked Questions (FAQ)

Q1: What are the most critical criteria for selecting a substitute for the SR103 Schottky diode rectifier?
A1: Electrical parameters such as technology (Schottky), maximum DC reverse voltage (30 V), average rectified current (1A), forward voltage (550 mV @ 1A), reverse leakage current at the specified voltage, mounting type (through-hole), and package (DO-204AL, DO-41) are strictly required for substitution.

Q2: Can I use any of the substitute parts in a DO-41 footprint?
A2: Yes, all substitute parts are supplied in the DO-204AL (DO-41, Axial) through-hole package, mechanically matching the SR103 and ensuring compatibility with DO-41 footprints.

Q3: Are all the substitutes RoHS compliant?
A3: Yes, every substitute part and the main SR103 part are listed as ROHS3 compliant.

Q4: How does the reverse leakage current impact substitute compatibility?
A4: Reverse leakage current at 30 V is a functional parameter. Substitute parts have specified leakage currents within the expected range for this product category; for example, 10DQ03 matches SR103 at 500 µA, while 1N5818-TP and 1N5818_R2_00001 specify 1 mA and 200 µA, respectively.

Q5: Can substitute selection be made without considering product status?
A5: Product status informs component availability and ongoing support. All listed substitutes are active according to the input data. Selection should be based on required parameters and active product status.

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