BAQ34-GS08 Equivalent & Substitute Parts

Part Overview

The BAQ34-GS08 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 60 V DC reverse voltage and 200 mA average rectified current in a surface mount SOD-80 (DO-213AC, MINI-MELF) package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain functional compatibility across voltage, current, and thermal specifications while preserving the same package form factor and mounting technology.

Substiute Parts

BAQ34-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 27829BAQ34-GS08 Datasheet

Current PartRFQ

FDLL4150

onsemiIn Stock: 269800FDLL4150 Datasheet

MFR RecommendedRFQ

FDLL457A

onsemiIn Stock: 6278FDLL457A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BAQ34-GS08 are selected based on the following criteria:

Mandatory Compatibility Parameters:

• Package / Case: DO-213AC, MINI-MELF, SOD-80 (identical form factor required)
• Mounting Type: Surface Mount (same assembly process)
• Current - Average Rectified (Io): 200 mA (exact match)
• Technology: Standard (small signal rectifier classification)
• RoHS Status: ROHS3 Compliant (regulatory alignment)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (handling compatibility)

Voltage Rating Substitution Logic: Substitute diodes must have a DC reverse voltage rating equal to or greater than the original 60 V specification. This ensures the substitute can operate safely within the same voltage domain without exceeding reverse breakdown limits.

Thermal Compatibility: All substitute parts must support the operating temperature range of -65°C to 175°C junction temperature or higher to maintain functional reliability across the intended application environment.

Parameter Comparison

Engineering Selection Recommendations

FDLL4150 (onsemi): The FDLL4150 is an active product with identical current rating (200 mA) and package form factor (SOD-80). This part carries a 50 V reverse voltage rating, which is 10 V lower than the BAQ34-GS08. Selection of FDLL4150 is appropriate for applications where the circuit operates at or below 50 V reverse bias. The part maintains ROHS3 compliance and MSL-1 moisture sensitivity rating. Forward voltage characteristics are specified at 200 mA, providing direct comparison at maximum current.

FDLL457A (onsemi): The FDLL457A is an active product with identical current rating (200 mA) and package form factor (SOD-80). This part carries a 70 V reverse voltage rating, which exceeds the BAQ34-GS08 specification by 10 V. Selection of FDLL457A is appropriate for applications requiring voltage margin above the original 60 V specification or for circuits operating across a wider voltage range. The part maintains ROHS3 compliance and MSL-1 moisture sensitivity rating. Reverse leakage current is specified at 60 V, directly comparable to the original part's operating point.

Both substitute parts are manufactured by onsemi, an active semiconductor supplier, ensuring long-term availability and supply chain continuity compared to the obsolete BAQ34-GS08.

Frequently Asked Questions (FAQ)

Q: Can FDLL4150 be used as a direct replacement for BAQ34-GS08?

A: FDLL4150 is compatible with BAQ34-GS08 in applications where the reverse voltage does not exceed 50 V. The 50 V rating of FDLL4150 is 10 V lower than the original 60 V specification. Circuit design must confirm that reverse bias voltage remains within the 50 V limit to ensure safe operation.

Q: Can FDLL457A be used as a direct replacement for BAQ34-GS08?

A: FDLL457A is compatible with BAQ34-GS08 across all voltage, current, and thermal parameters. The 70 V reverse voltage rating of FDLL457A exceeds the original 60 V specification, providing additional voltage margin. Package form factor, mounting type, and current rating are identical.

Q: Are the SOD-80 packages of all three parts physically identical?

A: Yes. BAQ34-GS08, FDLL4150, and FDLL457A all use the DO-213AC MINI-MELF SOD-80 package. Physical dimensions and land pattern compatibility are identical, allowing direct PCB assembly substitution without layout modification.

Q: What is the difference in reverse leakage current between these parts?

A: BAQ34-GS08 specifies 1 nA @ 30 V. FDLL4150 specifies 100 nA @ 50 V. FDLL457A specifies 25 nA @ 60 V. Reverse leakage increases with applied voltage and temperature. Applications sensitive to leakage current should evaluate the specific measurement conditions provided for each part.

Q: Are all three parts RoHS compliant?

A: Yes. BAQ34-GS08, FDLL4150, and FDLL457A are all ROHS3 compliant and carry MSL-1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing processes and environmental regulations.

Q: What is the primary reason to substitute BAQ34-GS08?

A: BAQ34-GS08 is classified as obsolete. FDLL4150 and FDLL457A are active products from onsemi, ensuring continued availability, supply chain stability, and manufacturer support for new designs and production runs.

Q: How do forward voltage characteristics compare?

A: BAQ34-GS08 specifies 1 V @ 100 mA. FDLL4150 specifies 1 V @ 200 mA. FDLL457A specifies 1 V @ 10 mA. Forward voltage is measured at different current levels for each part. Direct comparison requires evaluation at the same operating current within the application circuit.