BAS40W-04-7 Equivalent & Substitute Parts

Part Overview

The BAS40W-04-7 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 SC-70, SOT-323 surface mount format. The BAS40W-04-7 is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs.

Substiute Parts

BAS40W-04-7

Diodes IncorporatedIn Stock: 755BAS40W-04-7 Datasheet

Current PartRFQ

BAS40W-04-7-F

Diodes IncorporatedIn Stock: 8224BAS40W-04-7-F Datasheet

Parametric EquivalentRFQ

1PS70SB44,115

Nexperia USA Inc.In Stock: 23501PS70SB44,115 Datasheet

MFR RecommendedRFQ

BAS40-04W,115

Nexperia USA Inc.In Stock: 29470BAS40-04W,115 Datasheet

MFR RecommendedRFQ

BAT54SWFILM

STMicroelectronicsIn Stock: 32223BAT54SWFILM Datasheet

MFR RecommendedRFQ

BAT6404WH6327XTSA1

Infineon TechnologiesIn Stock: 29449BAT6404WH6327XTSA1 Datasheet

MFR RecommendedRFQ

BAT854SW,115

Nexperia USA Inc.In Stock: 142971BAT854SW,115 Datasheet

MFR RecommendedRFQ

RB450FT106

Rohm SemiconductorIn Stock: 2294RB450FT106 Datasheet

MFR RecommendedRFQ

CMSSH-3SE TR PBFREE

Central Semiconductor CorpIn Stock: 7959CMSSH-3SE TR PBFREE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS40W-04-7 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Diode Configuration: 1 Pair Series Connection
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 40 V
• Package / Case: SC-70, SOT-323
• Mounting Type: Surface Mount

Current Rating Considerations: Substitute parts are grouped based on average rectified current (Io) per diode. The BAS40W-04-7 operates at 200 mA. Substitutes with equal or higher current ratings (200 mA or greater) provide direct replacement capability. Substitutes with lower current ratings (120 mA or 100 mA) are suitable only for applications where the circuit current demand does not exceed the substitute part's rating.

Compliance and Status: The original BAS40W-04-7 is RoHS non-compliant and discontinued. Active substitute parts with ROHS3 compliance are available for new designs and procurement continuity.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Identical Electrical and Mechanical Specifications):

BAS40W-04-7-F is the primary direct replacement. This part maintains identical electrical parameters (40 V, 200 mA, 1 V @ 40 mA, 5 ns trr) and package configuration (SC-70, SOT-323). The BAS40W-04-7-F is active and ROHS3 compliant, addressing both availability and regulatory compliance requirements.

Equivalent Substitutes (Matching Voltage and Package, Current Rating ≥ 200 mA):

BAT854SW,115 (Nexperia USA Inc.) and CMSSH-3SE TR PBFREE (Central Semiconductor Corp) both provide 200 mA current rating with 40 V reverse voltage in SC-70, SOT-323 packaging. Both are active and ROHS3 compliant. Forward voltage characteristics differ slightly but remain within acceptable operating ranges for most applications.

BAT54SWFILM (STMicroelectronics) and BAT6404WH6327XTSA1 (Infineon Technologies) provide higher current ratings (300 mA and 250 mA respectively) with 40 V reverse voltage and SC-70, SOT-323 packaging. These parts are suitable for applications requiring higher current capacity and are active with ROHS3 compliance.

Reduced Current Rating Substitutes (120 mA or 100 mA):

1PS70SB44,115 and BAS40-04W,115 (both Nexperia USA Inc.) provide 120 mA current rating. RB450FT106 (Rohm Semiconductor) provides 100 mA current rating. These parts are suitable only for circuits where the maximum current demand does not exceed their respective ratings. All three are active and ROHS3 compliant.

Compliance Considerations:

The original BAS40W-04-7 is RoHS non-compliant. All identified substitute parts are ROHS3 compliant, supporting transition to compliant designs and procurement.

Frequently Asked Questions (FAQ)

Q: Can BAS40W-04-7-F be used as a direct replacement for BAS40W-04-7?

A: Yes. BAS40W-04-7-F maintains identical electrical specifications (40 V reverse voltage, 200 mA current rating, 1 V forward voltage @ 40 mA, 5 ns reverse recovery time) and package configuration (SC-70, SOT-323). The primary difference is product status (active vs. discontinued) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between substitutes with 200 mA, 250 mA, and 300 mA current ratings?

A: Current rating indicates the maximum average rectified current the diode can conduct. A 200 mA part is rated for the same current as the original BAS40W-04-7. A 250 mA or 300 mA part can conduct higher currents and is suitable for applications requiring greater current capacity. Selection depends on circuit current requirements. Oversizing current rating does not negatively affect circuit operation in most applications.

Q: Can I use a 120 mA or 100 mA substitute in place of the 200 mA BAS40W-04-7?

A: Only if the circuit current demand does not exceed the substitute part's rating. The 1PS70SB44,115, BAS40-04W,115, and RB450FT106 are rated for 120 mA, 120 mA, and 100 mA respectively. Exceeding the rated current will cause device failure. Verify circuit current requirements before selecting a lower-rated substitute.

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

A: Yes. All identified substitutes are packaged in SC-70, SOT-323 surface mount format, matching the original BAS40W-04-7 package. This ensures mechanical and electrical compatibility on printed circuit boards without layout modifications.

Q: What is the significance of RoHS compliance for substitute selection?

A: The original BAS40W-04-7 is RoHS non-compliant. All identified substitutes are ROHS3 compliant. For new designs and procurement in regulated markets, ROHS3 compliance is mandatory. Selecting a compliant substitute ensures regulatory adherence and supports long-term supply chain continuity.

Q: How do forward voltage differences between substitutes affect circuit operation?

A: Forward voltage (Vf) varies slightly among substitutes. The original BAS40W-04-7 specifies 1 V @ 40 mA. Substitutes range from 450 mV to 1 V depending on manufacturer and test conditions. In most rectification and switching applications, these variations have minimal impact on circuit performance. For precision applications with tight voltage tolerances, verify forward voltage specifications against circuit requirements.

Q: What is reverse recovery time (trr) and why does it matter?

A: Reverse recovery time is the interval required for a diode to stop conducting after the applied voltage reverses. The original BAS40W-04-7 specifies 5 ns. Substitutes with identical or faster trr (5 ns or less) are suitable for high-frequency switching applications. Longer trr values may introduce switching losses in high-frequency circuits.

Q: Can I mix different substitute parts in the same circuit?

A: All identified substitutes are electrically equivalent within their rated parameters and share the same package. Mixing different part numbers in the same circuit is permissible from a functional standpoint, provided each part's current rating meets the circuit requirements at its location. However, using a single part number throughout a design simplifies procurement, inventory management, and troubleshooting.