1N4934GP Equivalent & Substitute Parts

Part Overview

The 1N4934GP is a general-purpose rectifier diode rated for 100 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. Manufactured by onsemi, this component is classified as obsolete, indicating it has been discontinued and is no longer recommended for new designs. Identifying equivalent and substitute parts is necessary to maintain design continuity, support legacy systems, and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 100 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-50 to 150	°C

Substitute Part Grouping Explanation

Substitution of the 1N4934GP is determined by strict electrical and mechanical compatibility. The following parameters must be matched or exceeded in substitute components:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Current - Average Rectified (Io): 1 A minimum
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, or Axial compatible
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr): Must support fast recovery operation
Current - Reverse Leakage @ Vr: 5 µA @ 100 V maximum

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents (100 V, 1 A, Fast Recovery) Parts meeting all electrical specifications with identical or superior performance characteristics. These include 1N4934G, 1N4934-T, 1N4934G-T, 1N4934GP-AP, EGP10B-E3/54, and EGP10B-E3/73.

Category 2: Functional Equivalents with Extended Ratings (100 V, ≥1 A) Parts exceeding the 1 A current rating while maintaining 100 V reverse voltage and fast recovery characteristics. The 1N6077 (1.3 A rating) falls into this category.

Category 3: Alternative Package Configurations The 1N4934RLG provides identical electrical specifications in an axial package configuration, suitable for applications where package form factor is flexible.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Package	Product Status
1N4934GP	onsemi	100	1	1.2 @ 1 A	150	DO-41	Obsolete
1N4934G	Taiwan Semiconductor Corporation	100	1	1.2 @ 1 A	200	DO-204AL (DO-41)	Active
1N4934RLG	onsemi	100	1	1.2 @ 1 A	300	Axial	Not For New Designs
1N4934-T	Diodes Incorporated	100	1	1.2 @ 1 A	200	DO-41	Active
1N4934G-T	Diodes Incorporated	100	1	1.2 @ 1 A	200	DO-41	Active
1N4934GP-AP	Micro Commercial Co	100	1	1.2 @ 1 A	200	DO-41	Active
1N6077	Microchip Technology	100	1.3	1.76 @ 18.8 A	30	Axial	Active
EGP10B-E3/54	Vishay General Semiconductor - Diodes Division	100	1	0.95 @ 1 A	50	DO-204AL (DO-41)	Active
EGP10B-E3/73	Vishay General Semiconductor - Diodes Division	100	1	0.95 @ 1 A	50	DO-204AL (DO-41)	Active
GP10B-E3/54	Vishay General Semiconductor - Diodes Division	100	1	1.1 @ 1 A	3000	DO-204AL (DO-41)	Active
GP10B-E3/73	Vishay General Semiconductor - Diodes Division	100	1	1.1 @ 1 A	3000	DO-204AL (DO-41)	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status, Identical Electrical Specifications):

1N4934-T (Diodes Incorporated) and 1N4934G-T (Diodes Incorporated) are recommended as primary substitutes. Both parts are in active production status, carry ROHS3 compliance certification, and maintain identical 100 V / 1 A electrical ratings with fast recovery characteristics. These parts are available in high inventory quantities (25,290 and 5,200 units respectively) and support through-hole DO-41 mounting.

1N4934GP-AP (Micro Commercial Co) provides an alternative active-status substitute with identical electrical specifications, ROHS3 compliance, and 1,035 units in stock.

Secondary Substitutes (Active Status, Enhanced Performance):

EGP10B-E3/54 and EGP10B-E3/73 (Vishay General Semiconductor - Diodes Division) are active-status alternatives featuring superior reverse recovery time (50 ns versus 150 ns) and lower forward voltage drop (950 mV versus 1.2 V). Both carry ROHS3 compliance and support DO-204AL (DO-41) packaging. These parts are suitable for applications requiring improved switching performance.

Extended Rating Substitute (Active Status):

1N6077 (Microchip Technology) provides a 100 V / 1.3 A rated alternative with superior reverse recovery time (30 ns). This part is suitable for applications requiring higher current capacity while maintaining 100 V reverse voltage rating. Note: RoHS non-compliant status applies.

Alternative Package Configuration (Not For New Designs):

1N4934RLG (onsemi) provides identical electrical specifications in an axial package configuration. Product status is "Not For New Designs," limiting its use to legacy system support and repair applications.

Avoid:

GP10B-E3/54 and GP10B-E3/73 (Vishay General Semiconductor - Diodes Division) employ standard recovery characteristics (3 µs reverse recovery time) rather than fast recovery, making them unsuitable for direct substitution in applications requiring fast recovery diode performance.

Frequently Asked Questions (FAQ)

Q: Can 1N4934-T directly replace 1N4934GP in existing designs?

A: Yes. The 1N4934-T maintains identical electrical specifications: 100 V reverse voltage, 1 A average rectified current, 1.2 V forward voltage drop at 1 A, and fast recovery characteristics (200 ns reverse recovery time). Both support through-hole DO-41 mounting. The 1N4934-T is in active production status with ROHS3 compliance.

Q: What is the difference between fast recovery and standard recovery diodes in this product category?

A: Fast recovery diodes exhibit reverse recovery times ≤ 500 ns (1N4934GP: 150 ns, 1N4934-T: 200 ns, EGP10B: 50 ns). Standard recovery diodes exceed 500 ns (GP10B: 3000 ns). Fast recovery diodes are required for switching power supplies and high-frequency rectification applications. Standard recovery diodes are suitable for line-frequency rectification. The 1N4934GP is a fast recovery device; substitutes must maintain this classification.

Q: Are EGP10B-E3/54 and EGP10B-E3/73 interchangeable?

A: Yes. Both parts are manufactured by Vishay General Semiconductor - Diodes Division with identical electrical specifications (100 V, 1 A, 950 mV forward voltage, 50 ns reverse recovery time) and DO-204AL (DO-41) packaging. The difference is packaging format: E3/54 is supplied in Tape & Reel (TR), while E3/73 is supplied in bulk packaging. Electrical performance is identical.

Q: Can 1N6077 replace 1N4934GP in all applications?

A: 1N6077 is electrically compatible for 100 V / 1 A applications due to its 1.3 A current rating and superior 30 ns reverse recovery time. However, 1N6077 uses an axial package configuration rather than DO-41, requiring mechanical redesign. Additionally, 1N6077 is RoHS non-compliant, which may conflict with design requirements. Verify package compatibility and compliance requirements before substitution.

Q: Why is 1N4934RLG listed as "Not For New Designs"?

A: 1N4934RLG carries a "Not For New Designs" product status designation, indicating onsemi has transitioned this part to legacy support only. While electrically equivalent to 1N4934GP, this part should be used only for repair and maintenance of existing systems. For new designs, select from active-status alternatives such as 1N4934-T or 1N4934G-T.

Q: What does ROHS3 compliance mean for this product category?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive 3 requirements, restricting lead, cadmium, mercury, hexavalent chromium, and specified brominated flame retardants. Most active-status substitutes carry ROHS3 certification. The 1N6077 is RoHS non-compliant and should be avoided in applications requiring RoHS compliance.

Q: Are there performance differences between 1N4934G and 1N4934-T?

A: Both parts maintain identical electrical specifications (100 V, 1 A, 1.2 V forward voltage). The primary difference is reverse recovery time: 1N4934G specifies 200 ns, while 1N4934-T also specifies 200 ns. Both are fast recovery devices suitable for direct substitution. 1N4934-T is available in significantly higher inventory (25,290 units versus 1,573 units for 1N4934G).

Q: Can GP10B-E3/54 be used as a substitute for 1N4934GP?

A: GP10B-E3/54 is not recommended as a direct substitute. While it maintains 100 V / 1 A electrical ratings and DO-204AL (DO-41) packaging, it employs standard recovery characteristics (3 µs reverse recovery time) rather than fast recovery (≤ 500 ns). This makes it unsuitable for applications requiring fast recovery diode performance, such as switching power supplies. Use only in line-frequency rectification applications where standard recovery is acceptable.

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