FR101-AP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The FR101-AP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical performance within the specified parameter ranges while offering active product status and current manufacturing availability.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	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)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 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 FR101-AP is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 1 A minimum
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, or Axial configuration
Operating Temperature Range: -55°C to 150°C minimum
RoHS3 Compliance: Required

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: ≤ 1.3 V @ 1 A
Reverse Recovery Time (trr): ≤ 200 ns
Current - Reverse Leakage @ Vr: ≤ 5 µA @ 50 V
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

All identified substitute parts meet or exceed the critical substitution criteria. Variations in secondary parameters remain within acceptable engineering tolerances for general purpose rectification applications.

Parameter Comparison

Parameter	FR101-AP (Main)	1N4933GP-AP	FR101A-G	FR101G A0G
Manufacturer	Micro Commercial Co	Micro Commercial Co	Comchip Technology	Taiwan Semiconductor Corporation
Product Status	Obsolete	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 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)	150 ns	200 ns	150 ns	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 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 ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

1N4933GP-AP (Micro Commercial Co)

This substitute maintains identical electrical specifications to the FR101-AP with the exception of forward voltage (1.2 V versus 1.3 V) and reverse recovery time (200 ns versus 150 ns). The part holds active product status with 681 units in stock. RoHS3 compliance and MSL 1 rating are confirmed. The lower forward voltage provides improved efficiency characteristics. This part is suitable for direct substitution in applications where the slightly extended reverse recovery time does not impact circuit performance.

FR101A-G (Comchip Technology)

This substitute is electrically identical to the FR101-AP across all primary parameters, including forward voltage (1.3 V @ 1 A) and reverse recovery time (150 ns). The part is supplied in Tape & Box packaging with 827 units in stock and active product status. RoHS3 compliance and MSL 1 rating are confirmed. Capacitance specification (25 pF @ 4V, 1MHz) is higher than the main part. This part is suitable for direct substitution with no electrical performance degradation.

FR101G A0G (Taiwan Semiconductor Corporation)

This substitute maintains identical electrical specifications to the FR101-AP across all primary parameters, including forward voltage (1.3 V @ 1 A) and reverse recovery time (150 ns). The part holds active product status with 1011 units in stock. RoHS3 compliance and MSL 1 rating are confirmed. Capacitance specification (10 pF @ 4V, 1MHz) is lower than the main part. This part is suitable for direct substitution with no electrical performance degradation.

All three substitute parts satisfy the mandatory substitution criteria and offer active manufacturing status, addressing the obsolescence of the FR101-AP.

Frequently Asked Questions (FAQ)

Q: Can the 1N4933GP-AP be used as a direct replacement for the FR101-AP?

A: Yes. The 1N4933GP-AP meets all critical substitution parameters: 50 V reverse voltage rating, 1 A average rectified current, through-hole mounting, DO-41 package, and -55°C to 150°C operating temperature range. The forward voltage is 1.2 V (lower than the 1.3 V specification), and reverse recovery time is 200 ns (versus 150 ns). Both variations remain within acceptable tolerances for general purpose rectification.

Q: What is the difference between FR101A-G and FR101G A0G?

A: Both parts are electrically equivalent to the FR101-AP with identical voltage ratings, current ratings, forward voltage, and reverse recovery time. The primary difference is capacitance: FR101A-G specifies 25 pF @ 4V, 1MHz, while FR101G A0G specifies 10 pF @ 4V, 1MHz. Manufacturer differs (Comchip Technology versus Taiwan Semiconductor Corporation). Both are suitable for direct substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three substitute parts (1N4933GP-AP, FR101A-G, and FR101G A0G) carry RoHS3 compliance certification. The main part FR101-AP is also RoHS3 compliant.

Q: Do the substitute parts have the same package configuration as the FR101-AP?

A: Yes. All substitute parts are rated for DO-204AL, DO-41, and Axial package configurations, matching the FR101-AP. Physical dimensions and lead spacing are identical, enabling direct board-level substitution without layout modifications.

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

A: All parts, including the main FR101-AP and all three substitutes, carry MSL 1 (Unlimited) rating. This indicates no moisture sensitivity restrictions and unlimited shelf life under standard storage conditions.

Q: Can these parts be used in high-temperature applications?

A: Yes. All parts are rated for junction operating temperatures from -55°C to 150°C, supporting applications across industrial and automotive temperature ranges.

Q: Which substitute offers the best forward voltage performance?

A: The 1N4933GP-AP offers the lowest forward voltage specification at 1.2 V @ 1 A, compared to 1.3 V for the FR101-AP, FR101A-G, and FR101G A0G. Lower forward voltage reduces power dissipation in rectification circuits.

Q: Are there inventory considerations for selecting a substitute?

A: Current inventory levels are: FR101-AP (1053 units), 1N4933GP-AP (681 units), FR101A-G (827 units), and FR101G A0G (1011 units). All parts are available in sufficient quantities for production requirements.

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