SS54F-HF Equivalent & Substitute Parts Reference

Part Overview

The SS54F-HF is a Schottky rectifier diode manufactured by Comchip Technology, categorized under Diodes, Rectifiers. It features a 40 V maximum reverse voltage and a 5 A average rectified current in a surface-mount SMAF (DO-214AC) package. The product status is Active, and it is RoHS3 compliant with an unlimited moisture sensitivity level. Identification and verification of alternative models is crucial to ensure continuity of supply and to support design choices constrained by inventory, packaging formats, or sourcing preferences.

Key Parameters

Parameter	Value
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	5A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 5 A
Speed	Fast Recovery =< 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 40 V
Capacitance @ Vr, F	500pF @ 4V, 1MHz
Mounting Type	Surface Mount
Package / Case	DO-214AC, SMA
Supplier Device Package	SMAF
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Parametric equivalence and substitution suitability are determined using the following parameters: technology, maximum DC reverse voltage, average rectified current, maximum forward voltage at rated current, switching speed, reverse leakage current, junction capacitance, mounting type, package/case, operating temperature range, RoHS status, and MSL. All listed substitutes match or are equivalent to SS54F-HF in these characteristics, ensuring compatibility within these defined constraints.

Parameter Comparison

Parameter	SS54F-HF Comchip	SS54-HF Comchip	SK54A-LTP Micro Commercial	SK54AHE3-LTP Micro Commercial
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V
Current - Average Rectified (Io)	5A	5A	5A	5A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 5 A	550 mV @ 5 A	550 mV @ 5 A	550 mV @ 5 A
Speed	Fast Recovery =< 500ns, >200mA (Io)	Fast Recovery =< 500ns, >200mA (Io)	Fast Recovery =< 500ns, >200mA (Io)	Fast Recovery =< 500ns, >200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 40 V	1 mA @ 40 V	1 mA @ 40 V	100 µA @ 40 V
Capacitance @ Vr, F	500pF @ 4V, 1MHz	500pF @ 4V, 1MHz	200pF @ 4V, 1MHz	200pF @ 4V, 1MHz
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts listed are Active, RoHS3 compliant, and have MSL 1 (Unlimited). Each alternative is equivalent in critical electrical and mechanical parameters. Automotive-grade and AEC-Q101 qualification is provided for SK54AHE3-LTP. Package and mounting type match for all substitutes.

Frequently Asked Questions (FAQ)

Q1: What determines if a Schottky rectifier can be substituted in this category?
A1: Substitution is based strictly on matching technology, maximum reverse voltage, average rectified current, maximum forward voltage at rated current, reverse leakage current, junction capacitance, switching speed, mounting type, package/case, operating temperature range, RoHS status, and MSL.

Q2: Are alternate package types available for SS54F-HF equivalents?
A2: All substitutes use the DO-214AC (SMA) surface-mount package, consistent with the main part.

Q3: Can I replace SS54F-HF with SK54A-LTP or SK54AHE3-LTP directly?
A3: Yes. Both SK54A-LTP and SK54AHE3-LTP are parametric equivalents for all defined parameters, including electrical ratings, mechanical footprint, and compliance.

Q4: Does substituting SK54AHE3-LTP provide any additional qualifications?
A4: SK54AHE3-LTP includes automotive-grade designation and AEC-Q101 qualification based on the provided information.

Q5: How is reverse leakage current considered for substitution?
A5: Substitutes must provide equal or better reverse leakage current ratings as specified. SK54AHE3-LTP has a lower maximum reverse leakage current (100 µA @ 40 V) than the main part's 1 mA @ 40 V.

Q6: What compliance factors should be reviewed in selection?
A6: All listed parts are ROHS3 compliant and have unlimited MSL, aligning with standard industry environmental and reliability requirements.

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