FR103-TP Equivalent & Substitute Parts

Part Overview

The FR103-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design and procurement requirements. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within the same application category.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	200 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 @ 200 V
Capacitance @ Vr, F	15pF @ 4V, 1MHz
Package / Case	DO-204AL, DO-41, Axial
Mounting Type	Through Hole
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the FR103-TP is determined by strict equivalence across the following critical parameters: reverse voltage rating (200 V), average rectified current (1 A), forward voltage drop, recovery speed classification, reverse recovery time, reverse leakage current, package type (DO-41/DO-204AL through-hole), and operating temperature range. Parts are grouped into three categories based on their relationship to the main part:

Parametric Equivalents maintain all electrical specifications and differ only in product status (active vs. obsolete) or packaging format (tape & reel vs. bulk). These parts are direct functional replacements.

Upgrade Parts provide identical or superior electrical performance with extended operating temperature ranges or enhanced reliability certifications, suitable for applications requiring higher thermal margins or automotive qualification.

Similar Parts share the same voltage and current ratings but may differ in forward voltage drop, recovery time characteristics, or capacitance values. These parts are functionally compatible within the same application class but require verification of specific circuit requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	trr	Ir @ Vr	Package	Temp Range	Product Status
FR103-TP	Micro Commercial Co	200 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 200 V	DO-41	-55°C ~ 150°C	Obsolete
1N4935GP-TP	Micro Commercial Co	200 V	1 A	1.2 V @ 1 A	Fast Recovery ≤ 500ns	200 ns	5 µA @ 200 V	DO-41	-55°C ~ 150°C	Active
1N4942GP-TP	Micro Commercial Co	200 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 200 V	DO-41	-55°C ~ 150°C	Active
BYD33DGPHE3/54	Vishay General Semiconductor - Diodes Division	200 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 200 V	DO-204AL (DO-41)	-65°C ~ 175°C	Active
1N4003-E3/73	Vishay General Semiconductor - Diodes Division	200 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns	—	5 µA @ 200 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active
EGP10D	Fairchild Semiconductor	200 V	1 A	950 mV @ 1 A	Fast Recovery ≤ 500ns	50 ns	5 µA @ 200 V	DO-41	-65°C ~ 150°C	Active
HER103G B0G	Taiwan Semiconductor Corporation	200 V	1 A	1 V @ 1 A	Fast Recovery ≤ 500ns	50 ns	5 µA @ 200 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active
SF14GHA0G	Taiwan Semiconductor Corporation	200 V	1 A	950 mV @ 1 A	Fast Recovery ≤ 500ns	35 ns	5 µA @ 200 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active
FR103G	Taiwan Semiconductor Corporation	200 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 200 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active
FR103G A0G	Taiwan Semiconductor Corporation	200 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 200 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Parametric Equivalents for Direct Replacement:

The parts 1N4942GP-TP, FR103G, and FR103G A0G are parametric equivalents to the FR103-TP, maintaining identical electrical specifications including 1.3 V forward voltage drop and 150 ns reverse recovery time. These parts are active products suitable for direct substitution. The 1N4942GP-TP is supplied in tape & reel packaging, while FR103G and FR103G A0G are available in cut tape format, accommodating different procurement and assembly workflows.

Active Equivalent with Reduced Forward Voltage:

The 1N4935GP-TP offers a lower forward voltage drop of 1.2 V at 1 A compared to the FR103-TP specification of 1.3 V, with a slightly extended reverse recovery time of 200 ns. This part is active and suitable for applications where reduced power dissipation is beneficial.

Upgrade Option with Extended Temperature Range:

The BYD33DGPHE3/54 from Vishay provides identical electrical performance to the FR103-TP while extending the operating temperature range to -65°C ~ 175°C, compared to the original -55°C ~ 150°C specification. This part is recommended for applications requiring enhanced thermal margin or operation in extreme temperature environments.

Alternative Parts with Modified Characteristics:

The EGP10D, HER103G B0G, and SF14GHA0G are similar parts that maintain the 200 V / 1 A rating but feature reduced forward voltage drops (950 mV to 1 V) and faster reverse recovery times (35 ns to 50 ns). These characteristics result in lower power dissipation and improved switching performance. The SF14GHA0G includes automotive qualification (AEC-Q101) for applications requiring automotive-grade reliability.

Standard Recovery Alternative:

The 1N4003-E3/73 provides the same voltage and current ratings but operates with standard recovery characteristics (>500ns) rather than fast recovery. This part is suitable for low-frequency rectification applications where switching speed is not a critical parameter.

All recommended parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can the FR103-TP be replaced with the 1N4935GP-TP?

A: Yes. The 1N4935GP-TP is an active parametric equivalent with identical voltage and current ratings. The forward voltage drop is slightly lower (1.2 V vs. 1.3 V), and the reverse recovery time is marginally extended (200 ns vs. 150 ns). Both differences are within acceptable tolerance for general-purpose rectification applications.

Q: What is the difference between parametric equivalents and similar parts?

A: Parametric equivalents maintain all critical electrical specifications of the original part, differing only in product status or packaging format. Similar parts share the same voltage and current ratings but may have different forward voltage drops, recovery times, or capacitance values. Similar parts are functionally compatible but require circuit-level verification for specific applications.

Q: Is the BYD33DGPHE3/54 a direct replacement for the FR103-TP?

A: The BYD33DGPHE3/54 is functionally equivalent with identical electrical specifications and extended operating temperature range (-65°C ~ 175°C vs. -55°C ~ 150°C). It is classified as an upgrade option and is suitable for direct replacement in applications requiring higher thermal performance or extended temperature operation.

Q: Why do some substitute parts have lower forward voltage drops?

A: Forward voltage drop is a characteristic of diode technology and manufacturing process. Parts such as EGP10D (950 mV) and HER103G B0G (1 V) achieve lower forward voltage through optimized semiconductor design. Lower forward voltage reduces power dissipation and heat generation, which is beneficial in high-current or thermally constrained applications.

Q: What does reverse recovery time indicate, and why does it vary among equivalent parts?

A: Reverse recovery time (trr) is the interval required for a diode to transition from forward conduction to reverse blocking when the applied voltage reverses. Faster recovery times (35 ns to 50 ns) indicate superior switching performance and reduced switching losses, beneficial in high-frequency applications. The FR103-TP specification of 150 ns is typical for standard fast-recovery diodes.

Q: Can the 1N4003-E3/73 be used as a substitute for the FR103-TP?

A: The 1N4003-E3/73 shares the same voltage and current ratings but operates with standard recovery characteristics (>500ns) rather than fast recovery. It is suitable for low-frequency rectification applications where switching speed is not critical. For applications requiring fast recovery performance, this part is not recommended.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes and environmental regulations.

Q: What is the significance of the DO-41 and DO-204AL package designations?

A: DO-41 and DO-204AL are equivalent package designations for the same axial through-hole diode form factor. Both refer to a two-lead component with leads extending from opposite ends of the cylindrical body. Parts specified as DO-204AL (DO-41) are functionally identical in physical dimensions and mounting characteristics to parts specified as DO-41.

Q: Is the SF14GHA0G suitable for automotive applications?

A: Yes. The SF14GHA0G includes automotive qualification per AEC-Q101 and is designated as an automotive-grade component. It is suitable for applications requiring automotive-level reliability and quality assurance.

Q: How should packaging format (tape & reel vs. cut tape vs. bulk) influence part selection?

A: Packaging format affects procurement and assembly workflow but does not impact electrical or mechanical performance. Tape & reel packaging is optimized for automated assembly equipment, cut tape for semi-automated processes, and bulk for manual assembly or low-volume applications. Selection should align with manufacturing process requirements.

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