GL34G/1 Equivalent & Substitute Parts

Part Overview

The GL34G/1 is a surface mount rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, part of the SUPERECTIFIER® series. This component is rated for 400 V DC reverse voltage with a 500 mA average rectified current capacity and operates across a junction temperature range of -65°C to 175°C. The GL34G/1 is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	500	mA
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 500 mA	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Package / Case	DO-213AA (Glass)	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-65 to 175	°C
Product Status	Obsolete	-

Substitute Part Grouping Explanation

Substitution of the GL34G/1 is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must maintain a DC reverse voltage rating of 400 V or higher to ensure equivalent circuit protection and reliability.

Current Rating: The substitute part must support the average rectified current requirement. The GL34G/1 is rated for 500 mA; substitute parts with equal or greater current capacity are acceptable.

Package and Mounting: The substitute part must use the DO-213AA (Glass) surface mount package to ensure mechanical and thermal compatibility with existing PCB layouts and assembly processes.

Operating Temperature Range: The substitute part must support the full junction temperature range of -65°C to 175°C to maintain performance across all operating conditions.

Recovery Characteristics: The substitute part must operate as a standard recovery diode with recovery time greater than 500 ns at currents exceeding 200 mA.

The 1N647UR-1 manufactured by Microchip Technology meets these substitution criteria with equivalent voltage and package specifications, though with a reduced average rectified current rating of 400 mA.

Parameter Comparison

Parameter	GL34G/1 (Vishay)	1N647UR-1 (Microchip)	Unit
Voltage - DC Reverse (Vr) (Max)	400	400	V
Current - Average Rectified (Io)	500	400	mA
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 500 mA	1 V @ 400 mA	V
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	5	50	nA @ 400 V
Package / Case	DO-213AA (Glass)	DO-213AA (Glass)	-
Mounting Type	Surface Mount	Surface Mount	-
Operating Temperature - Junction	-65 to 175	-65 to 175	°C
Product Status	Obsolete	Active	-
RoHS Status	RoHS non-compliant	RoHS non-compliant	-

Engineering Selection Recommendations

The GL34G/1 is classified as obsolete, necessitating transition to an active product for new designs and ongoing procurement. The 1N647UR-1 is an active product manufactured by Microchip Technology and provides electrical and mechanical compatibility with the GL34G/1 within defined operating parameters.

Voltage and Package Compatibility: Both parts are rated for 400 V DC reverse voltage and use the DO-213AA surface mount package, ensuring direct mechanical substitution on existing PCB designs.

Current Derating Consideration: The 1N647UR-1 has a maximum average rectified current of 400 mA compared to the GL34G/1 at 500 mA. Applications operating at or near the 500 mA specification of the GL34G/1 require circuit analysis to confirm the 400 mA rating of the 1N647UR-1 is sufficient.

Temperature Range: Both parts operate across the identical junction temperature range of -65°C to 175°C, ensuring thermal compatibility.

Compliance Status: Both parts carry identical RoHS non-compliant and REACH Unaffected designations. No compliance advantage exists between the two parts.

Product Availability: The 1N647UR-1 is currently in active production with confirmed inventory availability, whereas the GL34G/1 is obsolete.

Frequently Asked Questions (FAQ)

Q: Can the 1N647UR-1 directly replace the GL34G/1 in all applications?

A: Direct mechanical replacement is possible due to identical DO-213AA surface mount packaging. Electrical compatibility depends on circuit current requirements. Applications designed for the GL34G/1 at 500 mA average rectified current must be evaluated against the 1N647UR-1 maximum rating of 400 mA.

Q: What is the significance of the current rating difference between these parts?

A: The GL34G/1 supports 500 mA average rectified current, while the 1N647UR-1 supports 400 mA. In circuits operating below 400 mA, the 1N647UR-1 is fully compatible. In circuits requiring the full 500 mA capacity, alternative parts with higher current ratings must be evaluated.

Q: Are the forward voltage characteristics compatible?

A: The GL34G/1 specifies 1.2 V forward voltage at 500 mA, while the 1N647UR-1 specifies 1 V at 400 mA. At equivalent current levels, the 1N647UR-1 exhibits lower forward voltage drop, which may improve circuit efficiency but requires verification that the circuit design does not depend on the higher forward voltage of the GL34G/1.

Q: Do both parts meet the same compliance requirements?

A: Both parts are RoHS non-compliant and REACH Unaffected. No compliance advantage exists between the two parts for regulatory purposes.

Q: What is the reverse leakage current difference?

A: The GL34G/1 specifies 5 µA reverse leakage at 400 V, while the 1N647UR-1 specifies 50 nA at 400 V. The 1N647UR-1 exhibits significantly lower reverse leakage, which may improve circuit performance in high-impedance applications.

Q: Is the DO-213AA package suitable for automated assembly?

A: Yes. Both the GL34G/1 and 1N647UR-1 use the DO-213AA surface mount package, which is compatible with standard automated PCB assembly equipment and processes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message