BAS40-04-7-F-79 Equivalent & Substitute Parts

Part Overview

The BAS40-04-7-F-79 is a Schottky diode array in a 1 Pair Series Connection configuration, rated for 40 V DC reverse voltage and 200 mA average rectified current per diode. Manufactured by Diodes Incorporated, this component is packaged in a surface mount TO-236-3 (SOT-23-3) package. The part is classified as obsolete, which necessitates identification of active equivalent and substitute components that maintain identical electrical and mechanical specifications for continued design support and production continuity.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Series Connection
Technology	Schottky
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
Current - Reverse Leakage @ Vr	200 nA @ 30 V
Operating Temperature - Junction	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the BAS40-04-7-F-79 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Diode Configuration: 1 Pair Series Connection
Technology: Schottky
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
Current - Reverse Leakage @ Vr: 200 nA @ 30 V (or lower)
Operating Temperature - Junction: -55°C ~ 125°C (or equivalent range)

Mechanical Equivalence Criteria:

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

Compliance Criteria:

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

All substitute parts listed maintain full electrical and mechanical compatibility with the original BAS40-04-7-F-79 specification. Packaging variations (Cut Tape, Tape & Reel) do not affect functional equivalence.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Vr (Max)	Io (per Diode)	Vf (Max) @ If	trr	Ir @ Vr	Tj (Operating)	Package	Packaging Type
BAS40-04-7-F-79	Diodes Incorporated	Obsolete	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Tube
BAS40-04-7-F	Diodes Incorporated	Active	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Cut Tape & Digi-Reel
BAS40-04Q-7-F	Diodes Incorporated	Active	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Tape & Reel
BAS40-04Q-13-F	Diodes Incorporated	Active	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Tape & Reel
BAS40-04-E3-08	Vishay General Semiconductor - Diodes Division	Active	40 V	200 mA	1 V @ 40 mA	5 ns	100 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Cut Tape & Digi-Reel
BAS40-04-HF	Comchip Technology	Active	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Tape & Reel
BAS40-04-TP	Micro Commercial Co	Active	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Cut Tape & Digi-Reel
CDBT-40S-G	Comchip Technology	Active	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation: BAS40-04-7-F (Diodes Incorporated)

The BAS40-04-7-F is the direct active equivalent manufactured by the original supplier, Diodes Incorporated. This part maintains identical electrical specifications and is available in high volume (122,400 pcs in stock). Selection of this part eliminates any cross-manufacturer compatibility concerns and ensures continuity with the original design intent.

Secondary Recommendations: BAS40-04Q-7-F and BAS40-04Q-13-F (Diodes Incorporated)

Both variants are manufactured by Diodes Incorporated and maintain full electrical equivalence. The BAS40-04Q-13-F carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components. The BAS40-04Q-7-F is available in larger quantities (17,100 pcs) and is recommended for high-volume production environments.

Alternative Manufacturers:

BAS40-04-E3-08 (Vishay General Semiconductor - Diodes Division), BAS40-04-HF (Comchip Technology), BAS40-04-TP (Micro Commercial Co), and CDBT-40S-G (Comchip Technology) are all electrically equivalent alternatives. These parts are suitable for applications where multi-source qualification is required or where supply chain diversification is a design objective. All substitute parts maintain ROHS3 compliance and MSL 1 rating.

Packaging Considerations:

Selection between Cut Tape & Digi-Reel and Tape & Reel packaging is determined by production assembly requirements and inventory management practices. Electrical performance is independent of packaging format.

Frequently Asked Questions (FAQ)

Q: Can BAS40-04-7-F be used as a direct replacement for BAS40-04-7-F-79?

A: Yes. The BAS40-04-7-F is electrically and mechanically identical to the BAS40-04-7-F-79. The primary difference is product status: BAS40-04-7-F-79 is obsolete, while BAS40-04-7-F is active. Both parts share identical electrical specifications, package type (SOT-23-3), and compliance ratings.

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

A: Both parts are electrically identical and manufactured by Diodes Incorporated. The primary difference is packaging format: BAS40-04Q-7-F is supplied in standard Tape & Reel, while BAS40-04Q-13-F is supplied in Tape & Reel with automotive qualification (AEC-Q101). Selection depends on application requirements and supply chain specifications.

Q: Are cross-manufacturer substitutes (Vishay, Comchip, Micro Commercial Co) fully compatible?

A: Yes. All listed substitute parts maintain identical electrical specifications across voltage rating, current rating, forward voltage, reverse recovery time, and reverse leakage current. All are packaged in SOT-23-3 and are ROHS3 compliant. Cross-manufacturer substitution is supported by electrical equivalence.

Q: Does reverse leakage current variation affect substitution eligibility?

A: The BAS40-04-E3-08 exhibits 100 nA reverse leakage at 30 V, compared to 200 nA for the original part. This represents improved performance (lower leakage) and does not restrict substitution. Lower reverse leakage current is functionally compatible with designs specified for 200 nA maximum.

Q: What packaging format should be selected for production?

A: Packaging selection (Cut Tape & Digi-Reel versus Tape & Reel) is determined by assembly equipment compatibility and inventory management practices. Electrical performance is independent of packaging format. High-volume production typically utilizes Tape & Reel; lower-volume or prototype applications may utilize Cut Tape & Digi-Reel.

Q: Is automotive qualification required for this application?

A: Automotive qualification (AEC-Q101) is available through BAS40-04Q-13-F. Selection of this variant is required only if the application or end-use specification mandates automotive-grade components. Standard industrial-grade equivalents are suitable for non-automotive applications.

Q: Can the operating temperature range variation affect substitution?

A: All listed substitutes maintain the -55°C ~ 125°C operating temperature range or equivalent. The BAS40-04-E3-08 and CDBT-40S-G specify 125°C maximum junction temperature, which is compatible with the -55°C ~ 125°C range. No temperature-related restrictions apply to substitution.

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