S2BA Equivalent & Substitute Parts

Part Overview

The S2BA is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 100 V DC reverse voltage and 1.5 A average rectified current in a surface mount SMA package. This component is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement continuity. The S2BA operates across a junction temperature range of -55°C to 150°C and complies with ROHS3 and REACH standards.

Substiute Parts

S2BA

Diodes IncorporatedIn Stock: 300490S2BA Datasheet

Current PartRFQ

S2MA_HF

Diodes IncorporatedIn Stock: 5278S2MA_HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete S2BA is based on the following criteria:

Mandatory Compatibility Parameters:

• Current - Average Rectified (Io): 1.5 A (exact match required)
• Voltage - Forward (Vf) (Max) @ If: 1.15 V @ 1.5 A (exact match required)
• Package / Case: DO-214AC, SMA (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Speed: Standard Recovery >500ns, > 200mA (Io) (exact match required)
• Capacitance @ Vr, F: 20 pF @ 4V, 1MHz (exact match required)

Allowable Variation Parameters:

• Voltage - DC Reverse (Vr) (Max): Substitute must equal or exceed 100 V
• Current - Reverse Leakage @ Vr: Substitute must not exceed 5 µA at its rated Vr
• Operating Temperature - Junction: Substitute must cover or exceed -55°C to 150°C range
• Product Status: Active status preferred for long-term availability

The S2MA_HF meets all mandatory compatibility parameters while providing enhanced reverse voltage rating (1000 V versus 100 V) and extended low-temperature operating range (-65°C versus -55°C).

Parameter Comparison

Engineering Selection Recommendations

The S2MA_HF is the manufacturer-recommended substitute for the obsolete S2BA. Both components are manufactured by Diodes Incorporated and maintain identical electrical performance for current and forward voltage specifications. The S2MA_HF is classified as active product status, ensuring continued availability and supply chain stability compared to the obsolete S2BA.

The S2MA_HF provides enhanced reverse voltage capability (1000 V versus 100 V), which is a superset of the original S2BA specification and does not introduce incompatibility in applications designed for 100 V operation. The extended low-temperature operating range (-65°C versus -55°C) provides additional thermal margin. Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.

The identical package designation (DO-214AC, SMA), mounting type (surface mount), and electrical characteristics for current, forward voltage, recovery speed, and capacitance ensure direct functional replacement without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the S2MA_HF be used as a direct replacement for the S2BA in all applications?

A: The S2MA_HF is electrically and mechanically compatible with the S2BA for all applications within the S2BA's original 100 V specification. The higher reverse voltage rating of the S2MA_HF (1000 V) does not create incompatibility in circuits designed for 100 V operation.

Q: What is the primary difference between the S2BA and S2MA_HF?

A: The primary difference is the maximum DC reverse voltage rating: S2BA is rated for 100 V, while S2MA_HF is rated for 1000 V. All other electrical parameters, including current, forward voltage, recovery speed, and capacitance, are identical. The S2MA_HF also extends the low-temperature operating range to -65°C.

Q: Are both parts available in the same package?

A: Yes. Both the S2BA and S2MA_HF use the DO-214AC (SMA) surface mount package, enabling direct physical replacement on printed circuit boards without layout modifications.

Q: Why is the S2BA classified as obsolete?

A: The S2BA is listed as obsolete by the manufacturer. The S2MA_HF is the active equivalent product recommended for new designs and ongoing procurement.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the S2BA and S2MA_HF are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: Will using the S2MA_HF affect circuit performance compared to the S2BA?

A: No. The S2MA_HF maintains identical forward voltage (1.15 V @ 1.5 A), reverse recovery time characteristics, and capacitance specifications. The higher reverse voltage rating does not degrade performance in applications designed for 100 V operation.