ACDBQC40-HF Equivalent & Substitute Parts

Part Overview

The ACDBQC40-HF is a Schottky diode manufactured by Comchip Technology, rated for 40V DC reverse voltage with 200mA average rectified current. This component is designed for surface mount applications in the 0402 (1006 Metric) package format and is qualified to AEC-Q101 automotive standards. The part is currently in active production status with 4793 pieces available in inventory.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within established parametric boundaries.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 40 mA	—
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	200 nA @ 30 V	—
Operating Temperature - Junction	-55 to 125	°C
Package / Case	0402 (1006 Metric)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the ACDBQC40-HF is based on strict equivalence across the following critical parameters:

Voltage Rating: Maximum DC reverse voltage of 40V
Current Rating: Average rectified current of 200mA
Forward Voltage Characteristics: Maximum forward voltage of 1V at 40mA forward current
Reverse Recovery Time: 5 nanosecond specification
Reverse Leakage Current: 200 nanoamperes at 30V reverse voltage
Package Format: 0402 (1006 Metric) surface mount configuration
Temperature Range: Operating junction temperature from -55°C to 125°C
Compliance Standards: RoHS3 compliance and automotive-grade qualification

The BAS40LP-7 from Diodes Incorporated meets all these parametric requirements and is therefore classified as a parametric equivalent for the ACDBQC40-HF.

Parameter Comparison

Parameter	ACDBQC40-HF (Comchip)	BAS40LP-7 (Diodes Inc.)	Match Status
Technology	Schottky	Schottky	Equivalent
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	Equivalent
Current - Average Rectified (Io)	200 mA	200 mA	Equivalent
Voltage - Forward (Vf) (Max) @ If	1 V @ 40 mA	1 V @ 40 mA	Equivalent
Reverse Recovery Time (trr)	5 ns	5 ns	Equivalent
Current - Reverse Leakage @ Vr	200 nA @ 30 V	200 nA @ 30 V	Equivalent
Operating Temperature - Junction	-55°C to 125°C	-55°C to 125°C	Equivalent
Package / Case	0402 (1006 Metric)	0402 (1006 Metric)	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Capacitance @ Vr, F	5 pF @ 0V, 1MHz	2.3 pF @ 0V, 1MHz	BAS40LP-7 Lower

Engineering Selection Recommendations

Both the ACDBQC40-HF and BAS40LP-7 are active production components with full RoHS3 compliance. The ACDBQC40-HF carries AEC-Q101 automotive qualification, establishing its suitability for automotive-grade applications. The BAS40LP-7 maintains equivalent electrical performance across all critical parameters and operates within the same temperature range.

The primary distinction between these components is the junction capacitance specification: the BAS40LP-7 exhibits lower capacitance (2.3 pF) compared to the ACDBQC40-HF (5 pF). This difference is relevant only in high-frequency switching applications where capacitive effects influence circuit performance. For standard rectification and switching applications operating within the specified voltage and current parameters, this capacitance variance does not affect functional equivalence.

Both components are classified as small signal diodes with identical reverse recovery time characteristics, confirming their interchangeability in switching applications. Selection between these parts should be based on availability, supply chain requirements, and specific circuit design considerations related to capacitive loading.

Frequently Asked Questions (FAQ)

Q: Can the BAS40LP-7 be used as a direct replacement for the ACDBQC40-HF in automotive applications?

A: The BAS40LP-7 meets all electrical and mechanical specifications equivalent to the ACDBQC40-HF. However, the ACDBQC40-HF carries explicit AEC-Q101 automotive qualification. If AEC-Q101 certification is a design requirement, the ACDBQC40-HF is the specified component. For applications where automotive qualification is not mandated, the BAS40LP-7 provides equivalent electrical performance.

Q: What is the significance of the capacitance difference between these parts?

A: The ACDBQC40-HF has a junction capacitance of 5 pF while the BAS40LP-7 has 2.3 pF at 0V and 1MHz. In low-frequency rectification circuits, this difference is negligible. In high-frequency switching applications or circuits with tight capacitive coupling requirements, the lower capacitance of the BAS40LP-7 may provide performance advantages by reducing parasitic capacitive effects.

Q: Are both parts available in the same package format?

A: Yes. Both the ACDBQC40-HF and BAS40LP-7 are packaged in the 0402 (1006 Metric) surface mount format. The ACDBQC40-HF uses the 0402C/SOD-923F supplier device package, while the BAS40LP-7 uses the X1-DFN1006-2 supplier device package. Both are physically compatible with standard 0402 footprints.

Q: What are the moisture sensitivity levels for these components?

A: Both the ACDBQC40-HF and BAS40LP-7 have a Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements.

Q: Do both parts comply with environmental regulations?

A: Both components are ROHS3 compliant. The BAS40LP-7 is additionally noted as REACH Unaffected. Both carry the same ECCN (EAR99) and HTSUS (8541.10.0070) classifications.

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