SR105-AP Equivalent & Substitute Parts

Part Overview

The SR105-AP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original part is no longer readily available or where design flexibility permits component substitution within specified electrical and mechanical parameters.

Substiute Parts

SR105-AP

Micro Commercial CoIn Stock: 1117SR105-AP Datasheet

Current PartRFQ

SR005 R1G

Taiwan Semiconductor CorporationIn Stock: 908SR005 R1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SR105-AP is permissible when the replacement component meets or exceeds the following critical electrical and mechanical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 50 V or higher
• Technology: Schottky
• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, or Axial compatible

Current Rating Consideration: The SR105-AP is rated for 1 A average rectified current. Substitute parts with equal or higher current ratings (≥ 1 A) are electrically compatible. Parts with lower current ratings (such as 500 mA) operate within reduced current capacity and are suitable only for applications where the actual circuit current does not exceed the substitute part's rating.

Forward Voltage Compatibility: Forward voltage drop at rated current must not exceed the original specification to maintain circuit performance and thermal characteristics.

Speed and Leakage Parameters: Fast recovery characteristics (≤ 500ns, > 200mA) and reverse leakage current (500 µA @ 50 V) define the switching and standby performance envelope. Substitute parts must maintain these specifications.

Temperature Range: Operating temperature range of -55°C to 125°C establishes the thermal operating window. Substitute parts with equal or extended temperature ranges are acceptable.

Parameter Comparison

Engineering Selection Recommendations

SR005 R1G as Primary Substitute:

The SR005 R1G from Taiwan Semiconductor Corporation is electrically and mechanically compatible with the SR105-AP for applications where the circuit current requirement does not exceed 500 mA. Both components share identical voltage ratings (50 V), forward voltage characteristics, fast recovery speed, and reverse leakage specifications. The SR005 R1G is currently in active production status, ensuring long-term availability and supply chain reliability compared to the SR105-AP's end-of-life designation.

The SR005 R1G offers an extended operating temperature range (-55°C to 150°C versus -55°C to 125°C), providing additional thermal margin in high-temperature environments. The substitute component is ROHS3 compliant, meeting modern environmental and regulatory requirements.

Current Rating Limitation:

The primary constraint in substituting SR005 R1G for SR105-AP is the reduced average rectified current rating (500 mA versus 1 A). This substitution is valid only when the actual circuit current remains at or below 500 mA. For applications requiring the full 1 A rating of the original SR105-AP, alternative Schottky diodes with 1 A or higher current ratings must be evaluated.

Compliance and Regulatory Status:

Both components carry REACH Unaffected status and EAR99 ECCN classification. The SR005 R1G's ROHS3 compliance and MSL Level 1 rating indicate suitability for modern manufacturing and storage environments without moisture sensitivity constraints.

Frequently Asked Questions (FAQ)

Q: Can SR005 R1G directly replace SR105-AP in all applications?

A: SR005 R1G is electrically and mechanically compatible with SR105-AP only when the circuit current does not exceed 500 mA. The SR105-AP is rated for 1 A, while SR005 R1G is rated for 500 mA. If your circuit draws more than 500 mA, the substitute will operate outside its rated current capacity and is not appropriate.

Q: What are the key electrical parameters that determine substitution compatibility?

A: The critical parameters are voltage rating (50 V minimum), technology (Schottky), forward voltage drop (700 mV maximum at rated current), fast recovery speed (≤ 500ns), and reverse leakage current (500 µA @ 50 V). All substitute parts must meet or exceed these specifications.

Q: Are the DO-41 and DO-204AL packages physically interchangeable?

A: Yes. Both the SR105-AP and SR005 R1G are available in DO-204AL and DO-41 packages, which are physically and functionally equivalent axial through-hole packages. They have identical pin spacing and mounting footprints.

Q: What is the significance of the SR005 R1G's extended temperature range?

A: The SR005 R1G operates from -55°C to 150°C, compared to the SR105-AP's -55°C to 125°C range. This 25°C extension at the upper limit provides additional thermal margin for applications in elevated-temperature environments, reducing the risk of thermal stress on the component.

Q: Why is the SR105-AP marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status and is no longer recommended for new product development. Existing inventory may be available, but long-term supply is not guaranteed. The SR005 R1G, with Active product status, is the recommended choice for new designs and ongoing production.

Q: Does the SR005 R1G's ROHS3 compliance affect its electrical performance?

A: No. ROHS3 compliance is a regulatory and environmental designation indicating the component is manufactured without restricted substances. It does not alter electrical performance or operating characteristics compared to non-compliant alternatives.

Q: Can I use a higher-voltage Schottky diode as a substitute?

A: Yes. A Schottky diode rated for 75 V, 100 V, or higher reverse voltage is electrically compatible with the SR105-AP, as higher voltage ratings provide additional safety margin. However, the current rating must still meet or exceed the circuit requirement, and the forward voltage drop must remain acceptable for the application.