SS320B-HF Equivalent & Substitute Parts

Part Overview

The SS320B-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 200 V DC reverse voltage and 3 A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when sourcing from multiple manufacturers is required for supply chain continuity. The SS320B-HF has documented substitutes within the same electrical and mechanical parameter class, primarily from Taiwan Semiconductor Corporation.

Substiute Parts

SS320B-HF

Comchip TechnologyIn Stock: 992SS320B-HF Datasheet

Current PartRFQ

SK320B

Taiwan Semiconductor CorporationIn Stock: 15662SK320B Datasheet

Parametric EquivalentRFQ

SK320B R5G

Taiwan Semiconductor CorporationIn Stock: 1026SK320B R5G Datasheet

Parametric EquivalentRFQ

SK320BH

Taiwan Semiconductor CorporationIn Stock: 6398SK320BH Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SS320B-HF is determined by the following critical parameters:

• Voltage Rating: 200 V DC reverse voltage (Vr) maximum
• Current Rating: 3 A average rectified current (Io)
• Forward Voltage: 950 mV maximum at 3 A
• Recovery Speed: Fast Recovery ≤ 500ns, > 200mA
• Package: DO-214AA (SMB) surface mount
• Operating Temperature Range: -55°C to 150°C junction temperature
• Compliance: ROHS3 Compliant, MSL 1

All substitute parts listed maintain these electrical and mechanical specifications. Variations in reverse leakage current, capacitance specifications, packaging format (Tape & Reel versus Cut Tape), and automotive qualification do not disqualify substitution when the primary parameters remain identical.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SK320B (Taiwan Semiconductor Corporation)

The SK320B is the direct parametric equivalent to the SS320B-HF. All critical electrical parameters are identical: 200 V reverse voltage, 3 A average rectified current, 950 mV forward voltage at 3 A, and fast recovery speed. Both components are ROHS3 compliant with MSL 1 rating. The SK320B is supplied in Tape & Reel format and maintains Active product status. Reverse leakage current is lower (100 µA versus 300 µA), which represents improved performance characteristics. This part is suitable for direct substitution in all applications where the SS320B-HF is specified.

Secondary Substitute: SK320BH (Taiwan Semiconductor Corporation)

The SK320BH is electrically identical to the SS320B-HF and SK320B, with the addition of automotive-grade qualification (AEC-Q101). This part is appropriate for applications requiring automotive-level reliability and traceability. The SK320BH is supplied in Tape & Reel format and maintains Active product status. Selection of this part is recommended when automotive qualification is a design requirement or when enhanced reliability documentation is necessary.

Tertiary Substitute: SK320B R5G (Taiwan Semiconductor Corporation)

The SK320B R5G is electrically equivalent but is supplied in Cut Tape (CT) packaging format rather than Tape & Reel. This part is listed as Discontinued at DiGi Electronics and should not be selected for new designs or long-term supply chain planning. Use only when existing inventory is available and packaging format compatibility with assembly processes is confirmed.

Frequently Asked Questions (FAQ)

Q: Can SK320B be used as a direct replacement for SS320B-HF?

A: Yes. The SK320B meets all critical electrical and mechanical parameters: 200 V reverse voltage, 3 A average rectified current, 950 mV forward voltage at 3 A, fast recovery speed, DO-214AA package, and identical operating temperature range. Both are ROHS3 compliant with MSL 1. The SK320B is the recommended substitute.

Q: What is the difference between SK320B and SK320BH?

A: The SK320BH includes automotive-grade qualification (AEC-Q101) and is designed for automotive applications. Electrical parameters are identical. Select SK320BH when automotive qualification is required; otherwise, SK320B is suitable.

Q: Why is reverse leakage current different between SS320B-HF (300 µA) and SK320B (100 µA)?

A: Reverse leakage current variation within the same voltage and current rating class is a normal manufacturing characteristic. The SK320B specification of 100 µA represents tighter control and improved performance. This difference does not prevent substitution; the SK320B is acceptable for all applications where the SS320B-HF is specified.

Q: Can SK320B R5G be used as a substitute?

A: SK320B R5G is electrically equivalent but is supplied in Cut Tape (CT) format and is discontinued at DiGi Electronics. Use only if existing inventory is available and assembly process compatibility with Cut Tape packaging is confirmed. For new designs, select SK320B (Tape & Reel) or SK320BH (Tape & Reel, automotive qualified).

Q: Are all substitutes compatible with the DO-214AA (SMB) package footprint?

A: Yes. All listed substitutes use the DO-214AA (SMB) surface mount package. PCB footprints and assembly processes are compatible without modification.

Q: What compliance certifications apply to all substitutes?

A: All substitutes are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity level. SK320BH additionally carries AEC-Q101 automotive qualification.

Q: Is the operating temperature range identical across all substitutes?

A: Yes. All substitutes maintain the -55°C to 150°C junction temperature operating range.