BAS40-04-HF Equivalent & Substitute Parts

Part Overview

The BAS40-04-HF is a Schottky diode array manufactured by Comchip Technology, configured as 1 pair series connection in a surface mount SOT-23-3 package. This component is rated for 40 V DC reverse voltage and 200 mA average rectified current per diode, with a maximum forward voltage of 1 V at 40 mA. The part is currently active in production with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are necessary to address supply chain continuity, inventory management, and sourcing flexibility across multiple manufacturers while maintaining identical electrical and mechanical performance characteristics.

Substiute Parts

BAS40-04-HF

Comchip TechnologyIn Stock: 971BAS40-04-HF Datasheet

Current PartRFQ

BAS40-04-7-F

Diodes IncorporatedIn Stock: 122487BAS40-04-7-F Datasheet

Parametric EquivalentRFQ

BAS40-04-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 32456BAS40-04-E3-08 Datasheet

Parametric EquivalentRFQ

BAS40-04-TP

Micro Commercial CoIn Stock: 33077BAS40-04-TP Datasheet

Parametric EquivalentRFQ

BAS40-04Q-13-F

Diodes IncorporatedIn Stock: 1156BAS40-04Q-13-F Datasheet

Parametric EquivalentRFQ

BAS40-04Q-7-F

Diodes IncorporatedIn Stock: 17145BAS40-04Q-7-F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS40-04-HF is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io) (per Diode): 200 mA (DC)
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 40 mA
• Reverse Recovery Time (trr): 5 ns
• Diode Configuration: 1 Pair Series Connection
• Technology: Schottky

Mechanical Parameters (Must Match):

• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain these core parameters. Variations in operating temperature range, reverse leakage current specifications, packaging format (Cut Tape vs. Tape & Reel), and automotive qualification do not disqualify substitution but represent secondary differentiators for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical equivalence to the BAS40-04-HF. Selection among substitutes is based on the following criteria:

For Standard Industrial Applications: BAS40-04-7-F (Diodes Incorporated) and BAS40-04Q-7-F (Diodes Incorporated) are suitable. Both provide extended operating temperature range (-55°C to 125°C) compared to the main part specification and maintain all core electrical parameters. BAS40-04-7-F is available in Cut Tape format for lower-volume requirements, while BAS40-04Q-7-F is supplied in Tape & Reel format for production volumes.

For Extended Temperature Range Requirements: BAS40-04-7-F, BAS40-04-TP (Micro Commercial Co), and BAS40-04Q-7-F all specify -55°C to 125°C operating range, providing superior thermal performance margin compared to the main part.

For Automotive Applications: BAS40-04Q-13-F (Diodes Incorporated) is qualified to AEC-Q101 automotive standard and is the only substitute with explicit automotive grade designation. This part is required for automotive-grade circuit designs.

For Superior Reverse Leakage Performance: BAS40-04-E3-08 (Vishay General Semiconductor) specifies 100 nA reverse leakage at 30 V, compared to 200 nA for other parts. This part is suitable for applications requiring lower leakage characteristics.

For Packaging Format Flexibility: Cut Tape format (BAS40-04-7-F, BAS40-04-E3-08, BAS40-04-TP) accommodates lower-volume or prototype applications. Tape & Reel format (BAS40-04Q-13-F, BAS40-04Q-7-F) is optimized for high-volume production assembly.

All substitute parts carry ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard PCB assembly processes and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can BAS40-04-7-F be used as a direct replacement for BAS40-04-HF?

A: Yes. BAS40-04-7-F is a parametric equivalent with identical electrical specifications (40 V reverse voltage, 200 mA current rating, 1 V forward voltage at 40 mA, 5 ns recovery time) and identical package (SOT-23-3). The primary difference is the packaging format (Cut Tape vs. Tape & Reel) and extended operating temperature range (-55°C to 125°C vs. 125°C maximum). Both are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between BAS40-04Q-13-F and BAS40-04Q-7-F?

A: Both parts are manufactured by Diodes Incorporated and are electrically identical. BAS40-04Q-13-F carries AEC-Q101 automotive qualification, making it suitable for automotive applications. BAS40-04Q-7-F is the standard industrial grade equivalent. Both are supplied in Tape & Reel format and specify -55°C to 125°C operating temperature range.

Q: Why does BAS40-04-E3-08 show lower reverse leakage current (100 nA vs. 200 nA)?

A: BAS40-04-E3-08 from Vishay specifies 100 nA reverse leakage at 30 V, while other substitutes specify 200 nA. This represents a tighter specification from the manufacturer and does not disqualify substitution. The part remains electrically equivalent for all other parameters and is suitable for applications where lower leakage is beneficial.

Q: Can I use Cut Tape format parts (BAS40-04-7-F) in place of Tape & Reel format (BAS40-04-HF)?

A: Yes, from an electrical and mechanical standpoint. However, packaging format affects procurement and assembly logistics. Cut Tape format is typically used for lower-volume or prototype applications, while Tape & Reel is optimized for automated high-volume production. Verify your assembly process requirements before substituting packaging formats.

Q: Is BAS40-04-TP suitable for high-temperature applications?

A: BAS40-04-TP specifies an operating temperature range of -55°C to 125°C, which is wider than the main part BAS40-04-HF (125°C maximum). This extended range makes it suitable for applications requiring lower temperature operation. However, the maximum junction temperature remains 125°C, consistent with other substitutes.

Q: What does ROHS3 compliance mean for these parts?

A: ROHS3 compliance indicates the parts meet the Restriction of Hazardous Substances Directive 3, restricting the use of specific hazardous materials including lead, cadmium, mercury, and certain flame retardants. All listed substitutes carry ROHS3 compliance, ensuring compatibility with modern PCB assembly standards and environmental regulations.

Q: Are all substitute parts available in the same quantities?

A: No. Inventory levels vary by manufacturer and distributor. BAS40-04-7-F (Diodes Incorporated) shows the highest inventory (122,400 pcs), while BAS40-04Q-13-F shows lower availability (1,051 pcs). Verify current stock levels with your supplier for production planning.

Q: Can I mix different manufacturers' parts in the same circuit board assembly?

A: Yes. All listed substitutes are parametrically equivalent and maintain identical electrical performance. Mixing manufacturers is acceptable from a functional standpoint. However, verify that your quality assurance and traceability procedures accommodate multiple manufacturers for the same function.