BAS40-7-F-79 Equivalent & Substitute Parts

Part Overview

The BAS40-7-F-79 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 40 V DC reverse voltage and 200 mA average rectified current in a surface mount SOT-23-3 package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing design support and procurement. Substitute parts must maintain electrical performance across voltage, current, and thermal specifications while accommodating packaging and supplier availability requirements.

Substiute Parts

BAS40-7-F-79

Diodes IncorporatedIn Stock: 869BAS40-7-F-79 Datasheet

Current PartRFQ

BAS40-7-F

Diodes IncorporatedIn Stock: 35440BAS40-7-F Datasheet

Parametric EquivalentRFQ

BAS40-TP

Micro Commercial CoIn Stock: 27834BAS40-TP Datasheet

Parametric EquivalentRFQ

BAS40HE3-TP

Micro Commercial CoIn Stock: 9949BAS40HE3-TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Electrical Equivalence Criteria:

• 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 (at specified voltage)
• Capacitance @ Vr, F: 4–5 pF @ 0V, 1MHz

Mechanical & Environmental Equivalence Criteria:

• Mounting Type: Surface Mount
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Operating Temperature - Junction: −55 to 125°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts meet these criteria and are classified as active products, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

BAS40-7-F (Diodes Incorporated)

This substitute is the direct active equivalent from the original manufacturer. It maintains identical electrical specifications and packaging. The BAS40-7-F is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and production volume requirements. Selection of this part ensures continuity with the original design intent and manufacturer support.

BAS40-TP (Micro Commercial Co)

This substitute provides electrical equivalence from an alternative manufacturer. The BAS40-TP is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. Capacitance specification increases to 5 pF, remaining within acceptable tolerance for most applications. This option expands supply chain diversity.

BAS40HE3-TP (Micro Commercial Co)

This substitute includes automotive-grade qualification (AEC-Q101) and is supplied in Tape & Reel (TR) format. The BAS40HE3-TP is specified for reverse leakage measurement at 40 V rather than 30 V, providing additional margin in high-voltage applications. Selection of this part is appropriate for automotive or mission-critical applications requiring enhanced reliability certification.

Frequently Asked Questions (FAQ)

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

A: Yes. The BAS40-7-F is a parametric equivalent with identical electrical specifications (40 V, 200 mA, 1 V forward voltage, 5 ns recovery time) and package configuration (SOT-23-3). The primary difference is product status: BAS40-7-F-79 is obsolete while BAS40-7-F is active. Packaging format differs (Cut Tape/Digi-Reel vs. original), but electrical performance is equivalent.

Q: What is the difference between BAS40-TP and BAS40HE3-TP?

A: Both parts are manufactured by Micro Commercial Co and share identical electrical specifications. The BAS40HE3-TP includes automotive-grade qualification (AEC-Q101) and specifies reverse leakage current at 40 V instead of 30 V. Selection depends on application requirements: BAS40-TP for general industrial use, BAS40HE3-TP for automotive or high-reliability applications.

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

A: Yes. All substitute parts use the SOT-23-3 package (also designated TO-236-3 or SC-59). Packaging format differs: BAS40-7-F is supplied in Cut Tape (CT) or Digi-Reel®, while BAS40-TP and BAS40HE3-TP are supplied in Tape & Reel (TR). These format differences do not affect electrical or mechanical compatibility.

Q: Does capacitance variation (4 pF vs. 5 pF) affect circuit performance?

A: Capacitance specification is provided at 0 V and 1 MHz. The 1 pF difference between BAS40-7-F-79 (4 pF) and substitute parts (5 pF) is within typical tolerance for Schottky diode applications. Circuit impact depends on specific frequency and impedance characteristics; however, this variation does not prevent functional substitution.

Q: Which substitute part should be selected for new designs?

A: For new designs, BAS40-7-F (Diodes Incorporated) is the preferred choice, maintaining continuity with the original manufacturer and ensuring long-term support. For automotive applications, BAS40HE3-TP (Micro Commercial Co) provides AEC-Q101 qualification. For supply chain diversification, BAS40-TP (Micro Commercial Co) offers equivalent performance from an alternative source.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance profile of the original BAS40-7-F-79.