ACGRC306-HF Equivalent & Substitute Parts

Part Overview

The ACGRC306-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 800V DC reverse voltage and 3A average rectified current in a surface mount DO-214AB (SMC) package. This component is classified as Active product status and carries AEC-Q101 automotive qualification. Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity while maintaining design specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 @ 3 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the ACGRC306-HF are identified based on strict equivalence of the following critical parameters:

Voltage Rating: DC reverse voltage of 800V maximum
Current Rating: Average rectified current of 3A
Forward Voltage: Maximum 1.15V at 3A forward current
Recovery Speed: Standard recovery classification with >500ns recovery time at >200mA
Package Type: DO-214AB (SMC) surface mount package
Temperature Range: Operating junction temperature from -55°C to 150°C
Automotive Grade: AEC-Q101 qualification required
Compliance: ROHS3 compliant status

The S3KH from Taiwan Semiconductor Corporation meets all these criteria and is therefore classified as a parametric equivalent substitute.

Parameter Comparison

Parameter	ACGRC306-HF (Comchip)	S3KH (Taiwan Semiconductor)	Match Status
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	Equivalent
Current - Average Rectified (Io)	3 A	3 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A	1.15 V @ 3 A	Equivalent
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Equivalent
Current - Reverse Leakage @ Vr	5 µA @ 800 V	10 µA @ 800 V	Within tolerance
Capacitance @ Vr, F	20 pF @ 4V, 1MHz	60 pF @ 4V, 1MHz	Within tolerance
Package / Case	DO-214AB, SMC	DO-214AB, SMC	Equivalent
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	Equivalent
Grade	Automotive	Automotive	Equivalent
Qualification	AEC-Q101	AEC-Q101	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

Both the ACGRC306-HF and S3KH are Active product status components with identical voltage and current ratings, forward voltage characteristics, and recovery speed classifications. Both components carry AEC-Q101 automotive qualification and ROHS3 compliance, making them suitable for automotive and industrial applications requiring 800V/3A rectification in surface mount form factor.

The S3KH offers higher inventory availability (3761 pieces in stock versus 867 pieces for ACGRC306-HF), which may support procurement timelines and supply chain resilience. Both parts operate across the identical temperature range of -55°C to 150°C and share the same DO-214AB (SMC) package footprint, enabling direct substitution without PCB redesign.

Minor parameter variations exist in reverse leakage current (5 µA versus 10 µA at 800V) and junction capacitance (20 pF versus 60 pF at 4V, 1MHz), both of which remain within acceptable tolerance ranges for standard rectifier applications and do not affect functional equivalence for general-purpose rectification circuits.

Frequently Asked Questions (FAQ)

Q: Can S3KH replace ACGRC306-HF in existing designs without PCB modification?

A: Yes. Both components use the DO-214AB (SMC) surface mount package with identical pinout and footprint. No PCB layout changes are required for direct substitution.

Q: Are there differences in reverse leakage current between these parts?

A: The ACGRC306-HF specifies 5 µA reverse leakage at 800V, while the S3KH specifies 10 µA at 800V. Both values are within acceptable ranges for general-purpose rectifier applications and do not affect circuit performance in standard rectification configurations.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both ACGRC306-HF and S3KH carry AEC-Q101 automotive qualification and are suitable for automotive-grade applications.

Q: What is the significance of the capacitance difference (20 pF versus 60 pF)?

A: The junction capacitance difference (measured at 4V, 1MHz) is within acceptable tolerance for rectifier diodes. This parameter does not affect rectification performance in standard applications and is not a limiting factor for substitution.

Q: Are both parts RoHS compliant?

A: Yes. Both ACGRC306-HF and S3KH are ROHS3 compliant and suitable for applications requiring lead-free component specifications.

Q: What is the operating temperature range for both parts?

A: Both components operate across a junction temperature range of -55°C to 150°C, providing identical thermal performance specifications.

Q: Is there a difference in moisture sensitivity between these parts?

A: No. Both components carry Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

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