S5ACF Equivalent & Substitute Parts

Part Overview

The S5ACF is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 50 V DC reverse voltage and 5 A average rectified current in a Surface Mount SMC (DO-214AB) package. This component is classified as obsolete, indicating that direct procurement from original inventory may become limited. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for applications requiring this diode specification.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	5 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 5 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 50 V
Capacitance @ Vr, F	40pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC
Operating Temperature - Junction	-65°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the S5ACF is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Current rating: 5 A average rectified current (Io)
Package type: Surface Mount SMC (DO-214AB)
Forward voltage: 1.15 V @ 5 A
Recovery speed: Standard Recovery >500ns, > 200mA (Io)
Reverse leakage: 10 µA at rated voltage
Capacitance: 40pF @ 4V, 1MHz
Operating temperature range: -65°C ~ 150°C
Compliance: ROHS3 Compliant, REACH Unaffected

Voltage Rating Consideration: The S5ACF operates at 50 V maximum reverse voltage. Substitute parts may exceed this voltage rating while maintaining all other electrical and mechanical parameters. A higher voltage rating does not compromise functionality in 50 V applications and provides additional design margin.

Parameter Comparison

Parameter	S5ACF (Main Part)	S5MC_HF (Substitute)
Manufacturer	Diodes Incorporated	Diodes Incorporated
Category	Diodes, Rectifiers	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	50 V	1000 V
Current - Average Rectified (Io)	5 A	5 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 5 A	1.15 V @ 5 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 50 V	10 µA @ 1000 V
Capacitance @ Vr, F	40pF @ 4V, 1MHz	40pF @ 4V, 1MHz
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-214AB, SMC	DO-214AB, SMC
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active

Engineering Selection Recommendations

The S5MC_HF is the manufacturer-recommended substitute for the S5ACF. Both components are manufactured by Diodes Incorporated and share identical electrical characteristics for forward voltage, recovery speed, reverse leakage current, and capacitance. Both maintain the same Surface Mount SMC package footprint and operating temperature range.

The S5MC_HF carries an Active product status, ensuring continued availability and supply chain support, whereas the S5ACF is classified as Obsolete. Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for new designs and production.

The primary difference is the maximum reverse voltage rating: S5MC_HF is rated for 1000 V compared to the S5ACF at 50 V. This higher voltage rating in the substitute part provides additional design margin and does not introduce incompatibility in applications designed for 50 V operation.

Frequently Asked Questions (FAQ)

Q: Can the S5MC_HF directly replace the S5ACF in existing designs?

A: Yes. The S5MC_HF maintains identical current rating (5 A), forward voltage (1.15 V @ 5 A), recovery speed, reverse leakage characteristics, capacitance, package type (DO-214AB, SMC), and operating temperature range (-65°C ~ 150°C). The higher voltage rating (1000 V vs. 50 V) does not create incompatibility in 50 V applications.

Q: What is the significance of the higher voltage rating in the S5MC_HF?

A: The S5MC_HF is rated for 1000 V maximum reverse voltage, compared to 50 V for the S5ACF. In applications operating at 50 V or below, the higher voltage rating provides additional safety margin and does not affect circuit performance. The diode will function identically within the 50 V operating envelope.

Q: Are there any package or footprint differences between these parts?

A: No. Both the S5ACF and S5MC_HF use the DO-214AB SMC Surface Mount package. PCB footprints and assembly processes remain unchanged.

Q: Why is the S5ACF classified as Obsolete?

A: The S5ACF is marked as Obsolete by the manufacturer, indicating that production has been discontinued. The S5MC_HF, classified as Active, represents the current production equivalent and ensures long-term supply availability.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the S5ACF and S5MC_HF are ROHS3 Compliant and REACH Unaffected, satisfying regulatory requirements for electronic components in regulated markets.

Q: What is the reverse leakage current difference between the two parts?

A: The S5ACF specifies 10 µA @ 50 V, while the S5MC_HF specifies 10 µA @ 1000 V. Both maintain the same leakage current magnitude, with the S5MC_HF measured at its higher rated voltage.

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