S1A General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The S1A is a general purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

The S1A R3G variant represents a parametric equivalent with identical electrical specifications but discontinued availability at DiGi Electronics. Identifying equivalent and substitute parts is necessary when the primary part number becomes unavailable or when alternative packaging formats are required for procurement or inventory management.

Substiute Parts

S1A

Taiwan Semiconductor CorporationIn Stock: 1036S1A Datasheet

Current PartRFQ

S1A R3G

Taiwan Semiconductor CorporationIn Stock: 1046S1A R3G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the S1A general purpose rectifier diode is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Voltage - DC Reverse (Vr) (Max): 50 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
• Reverse Recovery Time (trr): 1.5 µs
• Current - Reverse Leakage @ Vr: 1 µA @ 50 V
• Capacitance @ Vr, F: 12 pF @ 4V, 1MHz
• Package / Case: DO-214AC (SMA)
• Operating Temperature - Junction: -55°C to 175°C

The S1A R3G is classified as a parametric equivalent because all electrical specifications and thermal operating range are identical to the main part number. The primary difference is packaging format (Cut Tape versus standard packaging) and product availability status (Discontinued at DiGi Electronics).

Additional substitute part numbers identified in the extended substitute list (S1AB-13-F, RS1AB-13-F, US1A-13-F, S1A-13-F, GS2A-LTP) maintain the same electrical and package specifications, enabling direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: S1A

The S1A maintains Active product status with full availability (1014 Pcs in stock). This part number is the preferred selection for new designs and production applications requiring long-term supply continuity. ROHS3 compliance and REACH unaffected status confirm regulatory alignment for commercial and industrial applications.

Secondary Selection: S1A R3G

The S1A R3G is a direct parametric equivalent with identical electrical and thermal specifications. This part is suitable for applications where Cut Tape packaging format is acceptable for automated assembly processes. However, Discontinued at DiGi Electronics status indicates limited future availability and should be considered only when inventory is confirmed through alternative distribution channels.

Compliance Considerations

Both the S1A and S1A R3G carry ROHS3 compliance certification and REACH unaffected status, confirming suitability for regulated markets including European Union applications. Moisture Sensitivity Level 1 (Unlimited) indicates no special storage or handling requirements beyond standard component handling practices.

Frequently Asked Questions (FAQ)

Q: Can the S1A R3G be used as a direct replacement for the S1A?

A: Yes. The S1A R3G is a parametric equivalent with identical electrical specifications, reverse voltage rating (50 V), forward current rating (1 A), forward voltage drop (1.1 V @ 1 A), reverse recovery time (1.5 µs), and operating temperature range (-55°C to 175°C). Both components use the DO-214AC (SMA) surface mount package. The primary difference is packaging format (Cut Tape) and product availability status.

Q: What determines whether a substitute part is acceptable for the S1A?

A: Substitute parts must maintain identical specifications across voltage rating (50 V DC reverse), current rating (1 A average rectified), forward voltage characteristics (1.1 V @ 1 A), reverse recovery time (1.5 µs), reverse leakage current (1 µA @ 50 V), junction capacitance (12 pF @ 4V, 1MHz), and package type (DO-214AC/SMA). Operating temperature range must span -55°C to 175°C minimum.

Q: Are there packaging format differences between S1A and S1A R3G?

A: Yes. The S1A is supplied in standard packaging format, while the S1A R3G is supplied in Cut Tape (CT) format. Both use the same DO-214AC (SMA) surface mount package footprint. Cut Tape format is optimized for automated pick-and-place assembly equipment.

Q: What is the significance of the Discontinued at DiGi Electronics status for S1A R3G?

A: Discontinued at DiGi Electronics status indicates that this specific part number is no longer actively stocked through DiGi Electronics distribution. However, the part may remain available through alternative distributors or direct manufacturer channels. For new designs, the Active status S1A is the recommended selection to ensure long-term supply availability.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the S1A and S1A R3G carry ROHS3 compliance certification and REACH unaffected status. Moisture Sensitivity Level 1 (Unlimited) applies to both parts, indicating no special moisture control requirements during storage or handling.

Q: Can the S1A be used in high-temperature applications?

A: Yes. The S1A is rated for junction operating temperatures from -55°C to 175°C, supporting high-temperature applications within this range. Verify that circuit design and thermal management accommodate the maximum junction temperature specification.