SR203-TP Equivalent & Substitute Parts

Part Overview

The SR203-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 30V DC reverse voltage and 2A average rectified current in a DO-41 through-hole package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Locating equivalent substitute parts is necessary for maintenance, repair, and legacy system support where the original part is no longer available from primary sources.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 30 V
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-50°C ~ 125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SR203-TP is determined by matching the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 30 V minimum
Current - Average Rectified (Io): 2 A minimum
Technology: Schottky diode
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Matching Criteria:

Mounting Type: Through Hole
Package Category: Axial lead configuration (DO-41 or equivalent DO-204 variants)

Compliance Matching Criteria:

RoHS3 Compliant
REACH Unaffected status

The SB230-E3/54 meets all electrical requirements with identical voltage and current ratings, matching Schottky technology and fast recovery speed specifications. Both parts maintain through-hole axial mounting and ROHS3 compliance. Package variants (DO-41 versus DO-204AC) are mechanically compatible within axial lead diode form factors, allowing direct substitution in through-hole PCB applications.

Parameter Comparison

Parameter	SR203-TP (Main Part)	SB230-E3/54 (Substitute)
Manufacturer	Micro Commercial Co	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	30 V	30 V
Current - Average Rectified (Io)	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 2 A	500 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 30 V	500 µA @ 30 V
Mounting Type	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AC, DO-15, Axial
Operating Temperature - Junction	-50°C ~ 125°C	-65°C ~ 125°C
Technology	Schottky	Schottky
Product Status	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The SB230-E3/54 is the qualified substitute for SR203-TP based on the following engineering criteria:

Electrical Equivalence: Both parts share identical voltage and current ratings (30V, 2A) with matching Schottky technology and fast recovery speed characteristics. The SB230-E3/54 exhibits lower forward voltage (500 mV versus 550 mV at 2A) and lower reverse leakage current (500 µA versus 1 mA at 30V), representing improved performance characteristics within the same functional class.

Mechanical Compatibility: Both components utilize through-hole axial lead mounting. The DO-41 and DO-204AC packages are mechanically compatible within standard through-hole PCB layouts designed for axial diodes.

Compliance Status: The SB230-E3/54 maintains ROHS3 compliance and REACH unaffected status, matching the regulatory posture of the original part. The substitute part carries Active product status, ensuring ongoing availability and supply chain continuity.

Temperature Range: The SB230-E3/54 provides an extended lower operating temperature limit (-65°C versus -50°C), offering broader thermal operating envelope for legacy system support.

Frequently Asked Questions (FAQ)

Q: Can the SB230-E3/54 be used as a direct replacement for SR203-TP in existing PCB designs?

A: Yes. Both parts are 30V, 2A Schottky diodes with through-hole axial mounting. The DO-41 and DO-204AC packages are mechanically compatible in standard through-hole PCB layouts. No circuit modifications are required.

Q: What are the key differences between SR203-TP and SB230-E3/54?

A: The primary differences are manufacturer origin, forward voltage specification (550 mV versus 500 mV at 2A), reverse leakage current (1 mA versus 500 µA at 30V), and product status (Not For New Designs versus Active). Electrical performance is equivalent for the specified voltage and current ratings.

Q: Does the lower forward voltage of SB230-E3/54 affect circuit operation?

A: The 50 mV difference in forward voltage (550 mV to 500 mV) falls within typical Schottky diode tolerance ranges and does not alter circuit functionality in standard rectification applications. Both parts meet the 30V, 2A specification envelope.

Q: Are there package compatibility concerns when substituting DO-41 with DO-204AC?

A: No. Both DO-41 and DO-204AC are axial lead packages with compatible through-hole mounting footprints. Physical dimensions and lead spacing are standardized within the axial diode category.

Q: What is the significance of the SB230-E3/54 having Active product status?

A: Active status indicates the part is currently manufactured and available through authorized distributors. This ensures supply chain continuity for legacy system maintenance and repair applications where SR203-TP is no longer available.

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

A: Yes. Both SR203-TP and SB230-E3/54 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use in applicable markets.

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