BAQ35-GS18 Equivalent & Substitute Parts

Part Overview

The BAQ35-GS18 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 125 V DC reverse voltage and 200 mA average rectified current in a surface mount SOD-80 MiniMELF package. This part is classified as obsolete, necessitating identification of active equivalent components for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while supporting the same physical package footprint.

Substiute Parts

BAQ35-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 803BAQ35-GS18 Datasheet

Current PartRFQ

BAS45AL,115

Nexperia USA Inc.In Stock: 836BAS45AL,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAQ35-GS18 is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must support a minimum DC reverse voltage (Vr) of 125 V to maintain circuit protection and reliability under specified operating conditions.

Current Rating: The substitute part must support the average rectified current (Io) requirement of 200 mA or higher. Parts with higher current ratings remain compatible as they operate within the same voltage class and package envelope.

Forward Voltage: Forward voltage drop (Vf) at 100 mA must not exceed 1 V to ensure compatibility with existing circuit designs and power dissipation calculations.

Reverse Leakage: Reverse leakage current must remain at or below 1 nA at the specified reverse voltage to maintain circuit performance and prevent unintended current paths.

Package Compatibility: The substitute part must use the DO-213AC, MINI-MELF, or SOD-80 package designation to ensure mechanical fit on printed circuit boards designed for the BAQ35-GS18.

Thermal Range: Operating junction temperature range must support the -65°C to 175°C specification or higher to maintain functionality across the intended application environment.

Compliance: RoHS3 compliance is required to meet regulatory and procurement standards.

Parameter Comparison

Engineering Selection Recommendations

The BAS45AL,115 manufactured by Nexperia USA Inc. is a direct substitute for the obsolete BAQ35-GS18. Both parts share identical voltage ratings (125 V), forward voltage characteristics (1 V @ 100 mA), package specifications (DO-213AC, MINI-MELF, SOD-80), and maximum junction temperature (175°C). The BAS45AL,115 provides a higher current rating (250 mA versus 200 mA), which represents an enhancement rather than a limitation for the application.

The substitute part is classified as active product status, ensuring long-term availability and supply chain continuity. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), supporting equivalent environmental and regulatory requirements.

The BAS45AL,115 is available in Tape & Reel packaging, suitable for automated assembly processes. Selection of this substitute eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the BAS45AL,115 be used as a direct replacement for the BAQ35-GS18 in existing designs?

A: Yes. Both parts share identical voltage ratings (125 V), forward voltage drop (1 V @ 100 mA), package type (SOD-80 MiniMELF), and maximum junction temperature (175°C). The BAS45AL,115 supports a higher current rating (250 mA), which is compatible with circuits designed for 200 mA operation.

Q: What is the primary reason for substituting the BAQ35-GS18?

A: The BAQ35-GS18 is classified as obsolete. The BAS45AL,115 is an active product with equivalent electrical specifications and identical packaging, providing procurement continuity and long-term supply availability.

Q: Are there any differences in reverse leakage current between these parts?

A: The BAQ35-GS18 specifies 1 nA reverse leakage at 60 V, while the BAS45AL,115 specifies 1 nA at 125 V. The substitute measurement at higher voltage indicates equivalent or superior leakage performance across the operating range.

Q: Do both parts use the same physical package?

A: Yes. Both the BAQ35-GS18 and BAS45AL,115 use the DO-213AC, MINI-MELF, SOD-80 package designation, ensuring identical printed circuit board footprints and assembly compatibility.

Q: What is the difference in capacitance between these parts?

A: The BAQ35-GS18 has 3 pF capacitance at 0V, 1MHz, while the BAS45AL,115 has 4 pF at the same conditions. This 1 pF difference is negligible for general-purpose rectifier applications and does not affect circuit functionality.

Q: Are both parts RoHS compliant?

A: Yes. Both the BAQ35-GS18 and BAS45AL,115 are ROHS3 compliant and carry unlimited moisture sensitivity level (MSL 1), meeting equivalent environmental and regulatory standards.

Q: What packaging format is available for the BAS45AL,115?

A: The BAS45AL,115 is supplied in Tape & Reel (TR) format, suitable for automated pick-and-place assembly processes. This packaging format supports high-volume manufacturing operations.