ACURB206-HF 800V 2A General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The ACURB206-HF is a general purpose rectifier diode manufactured by Comchip Technology, rated for 800V DC reverse voltage and 2A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as Active product status and is AEC-Q101 qualified for automotive applications. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.7 @ 2 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	5	µA @ 800 V
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the ACURB206-HF are classified into two categories based on electrical equivalence:

Parametric Equivalent Parts maintain identical electrical specifications: 800V reverse voltage rating, 2A average rectified current, 1.7V forward voltage drop at 2A, fast recovery characteristics (≤500ns), 75ns reverse recovery time, and 5µA reverse leakage current at 800V. These parts are direct functional replacements with no performance trade-offs.

MFR Recommended Substitute (S3KB-TP) differs in current rating (3A vs. 2A) and recovery speed classification (Standard Recovery vs. Fast Recovery). This part is acceptable as a substitute because it meets or exceeds the voltage rating (800V) and current requirement (3A ≥ 2A), operates within the same temperature range, uses the identical DO-214AA package, and maintains RoHS3 compliance. The higher current rating and standard recovery speed do not create incompatibility in applications designed for the ACURB206-HF.

All substitute parts share the following critical compatibility parameters:

Voltage - DC Reverse (Vr) (Max): 800V
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Parameter Comparison

Parameter	ACURB206-HF (Main)	HS2K (Parametric Equivalent)	HS2K R5G (Parametric Equivalent)	S3KB-TP (MFR Recommended)
Manufacturer	Comchip Technology	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Micro Commercial Co
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V	800 V
Current - Average Rectified (Io)	2 A	2 A	2 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 2 A	1.7 V @ 2 A	1.7 V @ 2 A	1.15 V @ 3 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr)	75 ns	75 ns	75 ns	—
Current - Reverse Leakage @ Vr	5 µA @ 800 V	5 µA @ 800 V	5 µA @ 800 V	10 µA @ 800 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Packaging Type	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT)	Cut Tape (CT)
Operating Temperature - Junction	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Discontinued at DiGi Electronics	Active

Engineering Selection Recommendations

HS2K and HS2K R5G are parametric equivalents suitable for direct replacement of ACURB206-HF in all applications. Both parts are manufactured by Taiwan Semiconductor Corporation, maintain Active product status (HS2K) or are available in inventory despite discontinuation at DiGi Electronics (HS2K R5G), and provide identical electrical performance across all critical parameters. Selection between these two should be based on packaging preference: HS2K is supplied in Tape & Reel format, while HS2K R5G is supplied in Cut Tape format. Both are ROHS3 compliant with MSL 1 rating.

S3KB-TP is the MFR (manufacturer) recommended substitute and is suitable for applications where the higher current rating (3A) and standard recovery speed do not present design constraints. This part is manufactured by Micro Commercial Co, maintains Active product status, and offers higher inventory availability (3825 pcs). The 800V voltage rating and DO-214AA package ensure mechanical and electrical compatibility. The lower forward voltage drop (1.15V @ 3A) may provide thermal benefits in power dissipation-sensitive designs. Selection of S3KB-TP is appropriate when supply of parametric equivalents is limited or when the application benefits from higher current capacity.

Product Status Consideration: HS2K R5G is listed as Discontinued at DiGi Electronics; therefore, long-term availability cannot be assured. For new designs or production planning, HS2K (Active status, Taiwan Semiconductor Corporation) or S3KB-TP (Active status, Micro Commercial Co) are preferred selections.

Frequently Asked Questions (FAQ)

Q: Can HS2K replace ACURB206-HF without circuit modification?

A: Yes. HS2K is a parametric equivalent with identical voltage rating (800V), current rating (2A), forward voltage (1.7V @ 2A), recovery speed (Fast Recovery ≤500ns), and reverse recovery time (75ns). The DO-214AA package is identical. No circuit modification is required.

Q: What is the difference between HS2K and HS2K R5G?

A: Both parts are parametric equivalents with identical electrical specifications. The difference is packaging: HS2K is supplied in Tape & Reel (TR) format, while HS2K R5G is supplied in Cut Tape (CT) format. HS2K R5G is discontinued at DiGi Electronics; HS2K maintains Active status.

Q: Why is S3KB-TP listed as a substitute if it has different current and speed ratings?

A: S3KB-TP is the MFR (manufacturer) recommended substitute because it meets the critical compatibility requirements: 800V voltage rating, DO-214AA package, surface mount mounting type, and RoHS3 compliance. The 3A current rating exceeds the 2A requirement, and standard recovery speed (>500ns) is acceptable in applications designed for 2A operation. The part is suitable for substitution when parametric equivalents are unavailable.

Q: Are all substitute parts automotive qualified?

A: ACURB206-HF carries AEC-Q101 automotive qualification. HS2K, HS2K R5G, and S3KB-TP specifications provided do not explicitly list AEC-Q101 qualification. If automotive qualification is a design requirement, verify AEC-Q101 status with the respective manufacturers before selection.

Q: What is the impact of using S3KB-TP in a circuit designed for ACURB206-HF?

A: S3KB-TP has a lower forward voltage drop (1.15V @ 3A vs. 1.7V @ 2A) and standard recovery speed (>500ns vs. ≤500ns fast recovery). In rectification applications, the lower forward voltage reduces power dissipation. Standard recovery speed is suitable for general purpose rectification; fast recovery is typically required for high-frequency switching applications. Verify application frequency requirements before selection.

Q: Can packaging type (Tape & Reel vs. Cut Tape) affect circuit performance?

A: No. Packaging type (Tape & Reel or Cut Tape) affects handling, storage, and assembly processes but does not affect electrical performance or circuit operation. Selection should be based on manufacturing equipment compatibility and inventory management requirements.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and does not require special moisture control during storage or handling. All substitute parts listed carry MSL 1 rating, ensuring consistent handling requirements.

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