GL34A-TP Equivalent & Substitute Parts

Part Overview

The GL34A-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 500 mA average rectified current in a Surface Mount Mini MELF package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design and procurement requirements. The GL34A-TP operates across a junction temperature range of -65°C to 175°C and complies with RoHS3 and REACH regulations.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	500	mA
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 500 mA	V
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Mounting Type	Surface Mount	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	—
Operating Temperature - Junction	-65 to 175	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the GL34A-TP is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 500 mA minimum
Mounting Type: Surface Mount
Package / Case: DO-213AC, MINI-MELF, SOD-80 compatible
Operating Temperature - Junction: -65°C to 175°C minimum range
RoHS3 Compliance: Required

Direct Equivalents maintain identical electrical ratings (50 V, 500 mA) and package compatibility:

GL34A-E3/83 (Vishay, DO-213AA)
GL34A-E3/98 (Vishay, DO-213AA)
RGL34A-E3/98 (Vishay, DO-213AA)

Similar Substitutes share the same reverse voltage (50 V) and package family (SOD-80 MiniMELF) but differ in current rating or recovery characteristics:

BAV100-GS08 (Vishay, 250 mA, SOD-80)
BAV100-GS18 (Vishay, 250 mA, SOD-80)
CLL4150 BK PBFREE (Central Semiconductor, 300 mA, SOD-80)
CLL4150 TR PBFREE (Central Semiconductor, 300 mA, SOD-80)
LL4150GS08 (Vishay, 300 mA, SOD-80)
LL4150GS18 (Vishay, 600 mA, SOD-80)

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V]	Speed	Package	Temp Range [°C]	Status
GL34A-TP	Micro Commercial Co	50	500	1.2 @ 500 mA	Standard >500ns	DO-213AC, MINI-MELF, SOD-80	-65 to 175	Obsolete
GL34A-E3/83	Vishay	50	500	1.25 @ 500 mA	Fast ≤500ns	DO-213AA (Glass)	-65 to 175	Active
GL34A-E3/98	Vishay	50	500	1.2 @ 500 mA	Standard >500ns	DO-213AA (Glass)	-65 to 175	Active
RGL34A-E3/98	Vishay	50	500	1.3 @ 500 mA	Fast ≤500ns	DO-213AA (Glass)	-65 to 175	Active
BAV100-GS08	Vishay	50	250	1 @ 100 mA	Fast ≤500ns	DO-213AC, MINI-MELF, SOD-80	-55 to 175	Active
BAV100-GS18	Vishay	50	250	1 @ 100 mA	Fast ≤500ns	DO-213AC, MINI-MELF, SOD-80	-55 to 175	Active
CLL4150 BK PBFREE	Central Semiconductor	50	300	1 @ 200 mA	Fast ≤500ns	DO-213AC, MINI-MELF, SOD-80	-65 to 200	Active
CLL4150 TR PBFREE	Central Semiconductor	50	300	1 @ 200 mA	Fast ≤500ns	DO-213AC, MINI-MELF, SOD-80	-65 to 200	Active
LL4150GS08	Vishay	50	300	1 @ 200 mA	Fast ≤500ns	DO-213AC, MINI-MELF, SOD-80	-55 to 175	Active
LL4150GS18	Vishay	50	600	1 @ 200 mA	Fast ≤500ns	DO-213AC, MINI-MELF, SOD-80	-55 to 175	Active

Engineering Selection Recommendations

Direct Equivalents (Preferred for GL34A-TP Replacement):

GL34A-E3/98 and RGL34A-E3/98 are active production parts from Vishay General Semiconductor - Diodes Division with identical 50 V, 500 mA electrical specifications. Both maintain the same operating temperature range (-65°C to 175°C) and comply with RoHS3 and REACH requirements. GL34A-E3/98 matches the original forward voltage specification (1.2 V @ 500 mA) and standard recovery speed, providing the closest functional replacement. RGL34A-E3/98 offers fast recovery characteristics (150 ns) with slightly elevated forward voltage (1.3 V @ 500 mA), suitable for applications requiring improved switching performance. GL34A-E3/83 provides fast recovery (50 ns) with marginally higher forward voltage (1.25 V @ 500 mA).

Similar Substitutes (Current-Derated Applications):

BAV100-GS08 and BAV100-GS18 are automotive-qualified (AEC-Q101) parts rated for 250 mA, suitable only for applications where the design current requirement does not exceed 250 mA. Both share the DO-213AC/SOD-80 package and 50 V rating. CLL4150 variants (300 mA) and LL4150GS08 (300 mA) provide intermediate current ratings between the BAV100 series and the original GL34A-TP specification. LL4150GS18 offers 600 mA capability, exceeding the original specification and suitable for applications requiring higher current capacity within the same package envelope.

All substitute parts maintain RoHS3 compliance, MSL Level 1 (Unlimited), and REACH compliance status. Selection should be based on specific application current requirements and recovery speed characteristics.

Frequently Asked Questions (FAQ)

Q: Can GL34A-E3/98 directly replace GL34A-TP in all applications?

A: GL34A-E3/98 is electrically equivalent to GL34A-TP, matching the 50 V reverse voltage, 500 mA current rating, and 1.2 V forward voltage specification. Both operate across -65°C to 175°C. The primary difference is the package format: GL34A-E3/98 uses DO-213AA (Glass) while GL34A-TP uses DO-213AC/MINI-MELF. Physical board layout compatibility must be verified before substitution.

Q: What is the difference between GL34A-E3/98 and RGL34A-E3/98?

A: Both parts are rated 50 V, 500 mA with identical operating temperature ranges. GL34A-E3/98 exhibits standard recovery speed (>500 ns) with 1.2 V forward voltage. RGL34A-E3/98 provides fast recovery (150 ns) with 1.3 V forward voltage. Fast recovery characteristics reduce switching losses in high-frequency applications but increase forward voltage drop. Selection depends on circuit switching frequency requirements.

Q: Can BAV100-GS08 or BAV100-GS18 replace GL34A-TP?

A: BAV100 series parts are rated for 250 mA, which is 50% of the GL34A-TP specification. These parts are suitable only for applications where the actual circuit current does not exceed 250 mA. Both maintain 50 V reverse voltage rating and SOD-80 package compatibility. Automotive qualification (AEC-Q101) is an additional benefit for automotive applications.

Q: What is the advantage of LL4150GS18 over GL34A-TP?

A: LL4150GS18 is rated for 600 mA, providing 20% higher current capacity than GL34A-TP within the same SOD-80 package. Both maintain 50 V reverse voltage and fast recovery characteristics (4 ns). LL4150GS18 is suitable for applications requiring higher current handling or where design margin is desired. Operating temperature range is -55°C to 175°C, which is 10°C narrower at the lower limit.

Q: Are all substitute parts RoHS3 compliant?

A: All parts listed in this reference maintain RoHS3 compliance and REACH compliance status. Moisture Sensitivity Level (MSL) is Level 1 (Unlimited) for all parts, indicating no special moisture control requirements during storage or handling.

Q: What packaging options are available for GL34A-TP substitutes?

A: Direct equivalents (GL34A-E3/98, RGL34A-E3/98, GL34A-E3/83) use DO-213AA (Glass) package. Similar substitutes use DO-213AC/MINI-MELF/SOD-80 package formats. Packaging selection affects PCB footprint and thermal characteristics. Verify mechanical compatibility with existing board designs before substitution.

Q: Can CLL4150 TR PBFREE replace GL34A-TP?

A: CLL4150 TR PBFREE is rated for 300 mA, which is below the GL34A-TP specification of 500 mA. This part is suitable only for applications where circuit current does not exceed 300 mA. It maintains 50 V reverse voltage, fast recovery characteristics (4 ns), and operates across -65°C to 200°C, providing a 25°C higher upper temperature limit than GL34A-TP.

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