GL34G-TP Equivalent & Substitute Parts

Part Overview

The GL34G-TP is a general-purpose rectifier diode rated for 400 V DC reverse voltage and 500 mA average rectified current in a Mini MELF surface mount package. Manufactured by Micro Commercial Co, this component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain electrical performance within the specified voltage, current, and thermal operating ranges while accommodating package and mounting compatibility requirements.

Key Parameters

Parameter	GL34G-TP Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	500	mA
Voltage - Forward (Vf) (Max) @ If	1.2 @ 500 mA	V
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Operating Temperature - Junction	-65 to 175	°C
Mounting Type	Surface Mount	-
Package / Case	DO-213AC, MINI-MELF, SOD-80	-
RoHS Status	ROHS3 Compliant	-
Product Status	Obsolete	-

Substitute Part Grouping Explanation

Substitute parts for the GL34G-TP are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Electrical and Package Equivalents): Parts that maintain identical or superior electrical specifications (400 V reverse voltage, 500 mA average rectified current, -65°C to 175°C junction temperature range) and are packaged in DO-213AA (Glass) surface mount format. These parts are functionally interchangeable with the GL34G-TP in circuit applications where the Mini MELF package footprint can accommodate the DO-213AA (GL34) package geometry.

Similar Parts (Reduced Current Rating): Parts that meet the 400 V reverse voltage and temperature requirements but operate at reduced average rectified current (400 mA instead of 500 mA). These parts are suitable for applications where the full 500 mA current capacity is not required.

The critical parameters determining substitution eligibility are:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 500 mA minimum for direct substitutes
Operating Temperature - Junction: -65°C to 175°C
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant preferred for regulatory alignment

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V]	Speed	Ir @ Vr [µA]	Package	Status	Inventory [Pcs]
GL34G-TP	Micro Commercial Co	400	500	1.2 @ 500 mA	Standard >500ns	5 @ 400 V	DO-213AC, MINI-MELF, SOD-80	Obsolete	5200
BYM07-400-E3/83	Vishay General Semiconductor	400	500	1.35 @ 500 mA	Fast ≤500ns	5 @ 400 V	DO-213AA (Glass)	Active	735
BYM07-400-E3/98	Vishay General Semiconductor	400	500	1.35 @ 500 mA	Fast ≤500ns	5 @ 400 V	DO-213AA (Glass)	Active	5430
EGL34G-E3/83	Vishay General Semiconductor	400	500	1.35 @ 500 mA	Fast ≤500ns	5 @ 400 V	DO-213AA (Glass)	Active	6897
EGL34G-E3/98	Vishay General Semiconductor	400	500	1.35 @ 500 mA	Fast ≤500ns	5 @ 400 V	DO-213AA (Glass)	Active	1835
GL34G-E3/83	Vishay General Semiconductor	400	500	1.2 @ 500 mA	Standard >500ns	5 @ 400 V	DO-213AA (Glass)	Active	1048
GL34G-E3/98	Vishay General Semiconductor	400	500	1.2 @ 500 mA	Standard >500ns	5 @ 400 V	DO-213AA (Glass)	Active	2530
GL34GHE3/83	Vishay General Semiconductor	400	500	1.2 @ 500 mA	Standard >500ns	5 @ 400 V	DO-213AA (Glass)	Active	847
1N647UR-1	Microchip Technology	400	400	1 @ 400 mA	Standard >500ns	50 nA @ 400 V	DO-213AA (Glass)	Active	1189

Engineering Selection Recommendations

Primary Substitute Selection:

GL34G-E3/98 and GL34G-E3/83 (Vishay General Semiconductor) are the preferred direct substitutes for GL34G-TP. Both parts maintain identical electrical specifications (400 V reverse voltage, 500 mA average rectified current, 1.2 V forward voltage at 500 mA, standard recovery speed) and operate across the same junction temperature range (-65°C to 175°C). These parts are manufactured by Vishay under the GL34 base product number, ensuring design continuity. Both are ROHS3 compliant and carry active product status with established supply availability (GL34G-E3/98: 2530 pcs; GL34G-E3/83: 1048 pcs).

Alternative Substitute Selection:

GL34GHE3/83 (Vishay General Semiconductor) provides equivalent electrical performance to GL34G-TP with identical voltage, current, and thermal specifications. This part is also ROHS3 compliant and active, with 847 pcs in inventory.

Secondary Substitute Selection:

BYM07-400-E3/98 and BYM07-400-E3/83 (Vishay General Semiconductor, SUPERECTIFIER® series) are functionally compatible substitutes with enhanced performance characteristics. These parts maintain the 400 V reverse voltage and 500 mA average rectified current ratings but feature fast recovery speed (≤500ns) compared to the standard recovery speed (>500ns) of GL34G-TP. Forward voltage is slightly elevated at 1.35 V versus 1.2 V. These parts are ROHS3 compliant and active, with higher inventory availability (BYM07-400-E3/98: 5430 pcs; BYM07-400-E3/83: 735 pcs).

EGL34G-E3/98 and EGL34G-E3/83 (Vishay General Semiconductor, SUPERECTIFIER® series) offer the same fast recovery performance and electrical ratings as the BYM07 variants, with active status and ROHS3 compliance (EGL34G-E3/98: 1835 pcs; EGL34G-E3/83: 6897 pcs).

Limited Substitution:

1N647UR-1 (Microchip Technology) is suitable only for applications where the average rectified current requirement does not exceed 400 mA. This part operates at 400 V reverse voltage with standard recovery speed and is active with ROHS non-compliant status. Use is restricted to legacy designs or applications with reduced current demands.

Frequently Asked Questions (FAQ)

Q: Can GL34G-E3/98 directly replace GL34G-TP in existing circuit designs?

A: Yes. GL34G-E3/98 maintains identical electrical specifications (400 V reverse voltage, 500 mA average rectified current, 1.2 V forward voltage at 500 mA, standard recovery speed) and operates across the same junction temperature range (-65°C to 175°C). Both are surface mount devices with ROHS3 compliance. Package geometry differences between Mini MELF (GL34G-TP) and DO-213AA (GL34) require PCB footprint verification, but electrical performance is equivalent.

Q: What is the difference between GL34G-E3/98 and BYM07-400-E3/98?

A: Both parts meet the 400 V reverse voltage and 500 mA average rectified current requirements. The primary difference is recovery speed: GL34G-E3/98 features standard recovery (>500ns), while BYM07-400-E3/98 features fast recovery (≤500ns). Forward voltage differs slightly: GL34G-E3/98 is 1.2 V at 500 mA, while BYM07-400-E3/98 is 1.35 V at 500 mA. Selection depends on circuit switching frequency requirements and thermal dissipation constraints.

Q: Is 1N647UR-1 suitable as a substitute for GL34G-TP?

A: 1N647UR-1 is suitable only for applications where the average rectified current does not exceed 400 mA. This part is rated for 400 mA versus the 500 mA rating of GL34G-TP. Additionally, 1N647UR-1 carries RoHS non-compliant status, which may conflict with regulatory requirements for new designs. Use is restricted to legacy applications or designs with reduced current demands.

Q: What packaging considerations apply when substituting GL34G-TP?

A: GL34G-TP is specified in Mini MELF (DO-213AC, SOD-80) package format. All active substitute parts listed are packaged in DO-213AA (Glass) format. While both are surface mount devices with similar physical dimensions, PCB footprint geometry and land pattern specifications must be verified before implementation. Consult component datasheets and PCB design guidelines to confirm mechanical compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts except 1N647UR-1 are ROHS3 compliant. 1N647UR-1 carries RoHS non-compliant status. For applications requiring regulatory compliance with ROHS3 standards, select from GL34G-E3/98, GL34G-E3/83, GL34GHE3/83, BYM07-400-E3/98, BYM07-400-E3/83, EGL34G-E3/98, or EGL34G-E3/83.

Q: Which substitute part offers the highest inventory availability?

A: EGL34G-E3/83 offers the highest inventory availability with 6897 pcs in stock. BYM07-400-E3/98 provides the second-highest availability with 5430 pcs. Both parts are active, ROHS3 compliant, and meet the 400 V reverse voltage and 500 mA average rectified current specifications.

Q: Can fast recovery diodes (BYM07, EGL34G) be used in place of standard recovery diodes (GL34G)?

A: Fast recovery diodes can be used in applications designed for standard recovery diodes, provided that circuit design does not depend on the longer recovery time characteristic of standard recovery devices. Fast recovery diodes offer improved switching performance and reduced reverse recovery losses, which may benefit high-frequency switching applications. However, forward voltage is slightly elevated (1.35 V versus 1.2 V), which affects thermal dissipation and efficiency calculations. Circuit simulation or testing is recommended for critical applications.

Q: What is the significance of the E3/83 and E3/98 suffixes in part numbers?

A: The E3/83 and E3/98 suffixes indicate different tape and reel packaging configurations and manufacturing date codes. Both variants maintain identical electrical specifications and are functionally interchangeable. Selection between E3/83 and E3/98 is based on supply chain availability and packaging requirements rather than electrical performance.

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