1N4934-AP Equivalent & Substitute Parts

Part Overview

The 1N4934-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. This part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical and mechanical compatibility across critical parameters including voltage rating, current capacity, recovery characteristics, and package form factor.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	200	ns
Current - Reverse Leakage @ Vr	5	µA @ 100 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 1N4934-AP is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 1 A
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, or Axial variants
Operating Temperature Range: -55°C to 150°C minimum
RoHS Compliance: ROHS3 Compliant

Acceptable Parameter Variations:

Voltage - Forward (Vf) (Max) @ If: 1.2 V to 1.3 V (within design margin)
Reverse Recovery Time (trr): 150 ns to 200 ns (faster recovery acceptable)
Current - Reverse Leakage @ Vr: 5 µA (consistent across all parts)
Capacitance @ Vr, F: 10 pF to 25 pF (minor variation acceptable)

Identified substitutes meet all mandatory criteria and fall within acceptable parameter ranges. All substitute parts maintain active product status and full compliance certifications.

Parameter Comparison

Parameter	1N4934-AP (Main)	1N4934GP-AP	FR102A-G	FR102G A0G
Manufacturer	Micro Commercial Co	Micro Commercial Co	Comchip Technology	Taiwan Semiconductor Corporation
Product Status	Obsolete	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.2 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A
Reverse Recovery Time (trr)	200 ns	200 ns	150 ns	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V
Capacitance @ Vr, F	15 pF @ 4V, 1MHz	15 pF @ 4V, 1MHz	25 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	686 Pcs New Original In Stock	1035 Pcs New Original In Stock	908 Pcs New Original In Stock	813 Pcs New Original In Stock

Engineering Selection Recommendations

Primary Substitute: 1N4934GP-AP

The 1N4934GP-AP is the direct manufacturer equivalent from Micro Commercial Co. This part maintains identical electrical specifications to the 1N4934-AP with the exception of improved forward voltage (1.2 V versus 1.3 V @ 1 A), resulting in lower power dissipation. Product status is active with full ROHS3 compliance and REACH unaffected certification. Inventory availability is 1035 pieces. This part is the preferred selection for direct replacement in existing designs.

Secondary Substitutes: FR102A-G and FR102G A0G

Both FR102A-G (Comchip Technology) and FR102G A0G (Taiwan Semiconductor Corporation) are parametric equivalents meeting all mandatory electrical and mechanical criteria. Both parts feature improved reverse recovery time (150 ns versus 200 ns), enabling faster switching performance. FR102A-G is supplied in Tape & Box packaging, while FR102G A0G is supplied in standard packaging. Both maintain active product status, ROHS3 compliance, and full inventory availability (908 and 813 pieces respectively).

Compliance and Certification:

All substitute parts maintain ROHS3 compliance, EAR99 ECCN classification, and HTSUS code 8541.10.0080. Moisture sensitivity level is 1 (Unlimited) across all parts, indicating no special handling requirements. FR102G A0G includes REACH Unaffected certification.

Frequently Asked Questions (FAQ)

Q: Can the 1N4934-AP be directly replaced with 1N4934GP-AP?

A: Yes. The 1N4934GP-AP is the active equivalent from the same manufacturer with identical voltage and current ratings, package form factor, and operating temperature range. The improved forward voltage specification (1.2 V versus 1.3 V) represents a performance enhancement with no compatibility concerns.

Q: What is the difference between the Comchip FR102A-G and Taiwan Semiconductor FR102G A0G?

A: Both parts meet identical electrical specifications for voltage, current, and temperature range. The FR102A-G features 25 pF capacitance at 4V, 1MHz, while the FR102G A0G features 10 pF. Both offer improved reverse recovery time (150 ns) compared to the original 1N4934-AP (200 ns). Packaging differs: FR102A-G is supplied in Tape & Box format, while FR102G A0G uses standard packaging.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (1N4934GP-AP, FR102A-G, and FR102G A0G) are ROHS3 compliant and suitable for applications requiring RoHS certification.

Q: What is the significance of the improved reverse recovery time in FR102 variants?

A: The FR102A-G and FR102G A0G feature 150 ns reverse recovery time compared to 200 ns in the 1N4934-AP. Faster recovery time reduces switching losses and improves efficiency in high-frequency rectification applications. This represents a performance improvement with no negative compatibility implications.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes, provided the PCB layout accommodates the DO-41 axial through-hole package form factor. All substitute parts use identical package geometry (DO-204AL, DO-41, Axial). No PCB modifications are required for mechanical or electrical compatibility.

Q: What is the moisture sensitivity level for these diodes?

A: All parts carry MSL 1 (Unlimited), indicating no moisture sensitivity. Standard handling and storage procedures apply without special environmental controls.

Q: Are there any temperature range limitations for substitution?

A: No. All substitute parts maintain the identical operating temperature range of -55°C to 150°C junction temperature, ensuring full compatibility across thermal operating conditions.

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