FR104-TP Equivalent & Substitute Parts

Part Overview

The FR104-TP is a general-purpose rectifier diode rated for 400 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. Manufactured by Micro Commercial Co, this part is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the same electrical performance characteristics while offering active product status and improved availability.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A
Reverse Recovery Time (trr)	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the FR104-TP are classified into two categories based on electrical parameter alignment:

Direct Manufacturer Equivalents maintain identical electrical specifications across all critical parameters: 400 V reverse voltage, 1 A average rectified current, 1.3 V forward voltage drop at 1 A, 150 ns reverse recovery time, and 5 µA reverse leakage current at 400 V. These parts differ only in packaging format (Tape & Reel versus bulk) or product status (Active versus Obsolete).

Parametric Equivalents satisfy the core electrical requirements of 400 V reverse voltage and 1 A average rectified current but exhibit variations in secondary parameters such as reverse recovery time (35 ns to 200 ns), forward voltage drop (1.0 V to 1.3 V), or junction capacitance (10 pF to 25 pF). These variations remain within acceptable operating ranges for general-purpose rectification applications.

Similar Parts share the same voltage and package specifications but operate at higher current ratings (2 A) or include automotive-grade qualifications. These parts are suitable for applications requiring enhanced current capacity or reliability certifications.

All substitute parts maintain through-hole mounting in DO-41 or DO-204AL packages, ROHS3 compliance, and operating temperature ranges compatible with the original FR104-TP specification.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max)	Io	Vf (Max) @ If	trr (ns)	Ir @ Vr	Packaging	Inventory (Pcs)
FR104-TP	Micro Commercial Co	Obsolete	400 V	1 A	1.3 V @ 1 A	150	5 µA @ 400 V	DO-41	938
FR104GP-TP	Micro Commercial Co	Active	400 V	1 A	1.3 V @ 1 A	150	5 µA @ 400 V	Tape & Reel (TR)	824
1N4936GP-TP	Micro Commercial Co	Active	400 V	1 A	1.2 V @ 1 A	200	5 µA @ 400 V	Tape & Reel (TR)	1052
SF16G-TP	Micro Commercial Co	Active	400 V	1 A	1.3 V @ 1 A	35	5 µA @ 400 V	Cut Tape (CT)	1102
UF4004GP-TP	Micro Commercial Co	Active	400 V	1 A	1.3 V @ 1 A	50	5 µA @ 400 V	Cut Tape (CT)	15757
FR104G	Taiwan Semiconductor Corporation	Active	400 V	1 A	1.3 V @ 1 A	150	5 µA @ 400 V	Cut Tape (CT)	818
FR104G A0G	Taiwan Semiconductor Corporation	Active	400 V	1 A	1.3 V @ 1 A	150	5 µA @ 400 V	Cut Tape (CT)	5396
FR104G R1G	Taiwan Semiconductor Corporation	Active	400 V	1 A	1.3 V @ 1 A	150	5 µA @ 400 V	DO-41	933
FR104T-G	Comchip Technology	Active	400 V	1 A	1.3 V @ 1 A	150	5 µA @ 400 V	Tape & Reel (TR)	902
MUR240RLG	onsemi	Active	400 V	2 A	1.3 V @ 2 A	65	5 µA @ 400 V	Cut Tape (CT)	10400
UF4004HR1G	Taiwan Semiconductor Corporation	Active	400 V	1 A	1.0 V @ 1 A	50	5 µA @ 400 V	DO-204AL (DO-41)	704

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Performance):

FR104GP-TP, FR104G, FR104G A0G, FR104G R1G, and FR104T-G are direct electrical equivalents to the FR104-TP. All maintain 400 V reverse voltage, 1 A average rectified current, 1.3 V forward voltage drop at 1 A, and 150 ns reverse recovery time. These parts are classified as Active products with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Selection among these parts depends on packaging requirements: Tape & Reel format for automated assembly (FR104GP-TP, FR104T-G), Cut Tape for manual or semi-automated processes (FR104G, FR104G A0G), or bulk packaging (FR104G R1G).

Parametric Equivalents (Acceptable Electrical Variations):

1N4936GP-TP exhibits a lower forward voltage drop (1.2 V versus 1.3 V) and slightly longer reverse recovery time (200 ns versus 150 ns). This part is suitable for applications where reduced forward voltage loss is beneficial.

SF16G-TP provides significantly faster reverse recovery (35 ns versus 150 ns) and lower junction capacitance (10 pF versus 15 pF), making it appropriate for high-frequency switching applications.

UF4004GP-TP offers moderate reverse recovery time (50 ns) and is available in high inventory (15,757 pcs), providing supply chain advantages.

UF4004HR1G includes automotive-grade qualification (AEC-Q101) with lower forward voltage drop (1.0 V) and faster recovery (50 ns), suitable for automotive and reliability-critical applications.

Higher Current Rating:

MUR240RLG operates at 2 A average rectified current while maintaining 400 V reverse voltage. This part is appropriate for applications requiring higher current capacity than the 1 A specification of the FR104-TP. The onsemi SWITCHMODE™ series designation indicates optimization for switching power supply applications.

All recommended substitutes maintain ROHS3 compliance, through-hole mounting, and operating temperature ranges of -55°C to 150°C (or -65°C to 175°C for MUR240RLG).

Frequently Asked Questions (FAQ)

Q: Can FR104GP-TP directly replace FR104-TP in existing designs?

A: Yes. FR104GP-TP is electrically identical to FR104-TP, differing only in packaging format (Tape & Reel versus bulk) and product status (Active versus Obsolete). The part maintains all electrical specifications: 400 V reverse voltage, 1 A average rectified current, 1.3 V forward voltage drop at 1 A, and 150 ns reverse recovery time. Mechanical compatibility is confirmed through identical DO-41 package specifications.

Q: What is the difference between SF16G-TP and FR104-TP?

A: SF16G-TP maintains the same voltage (400 V) and current (1 A) ratings as FR104-TP but features significantly faster reverse recovery time (35 ns versus 150 ns) and lower junction capacitance (10 pF versus 15 pF). These characteristics make SF16G-TP suitable for high-frequency applications where switching speed is critical. Forward voltage drop remains identical at 1.3 V @ 1 A.

Q: Is UF4004GP-TP compatible with FR104-TP?

A: Yes. UF4004GP-TP is a parametric equivalent with identical voltage (400 V) and current (1 A) ratings. It exhibits faster reverse recovery (50 ns versus 150 ns) and slightly higher junction capacitance (17 pF versus 15 pF). Forward voltage drop is identical at 1.3 V @ 1 A. The primary advantage is significantly higher inventory availability (15,757 pcs).

Q: When should MUR240RLG be selected instead of FR104-TP equivalents?

A: MUR240RLG is appropriate when the application requires higher average rectified current (2 A versus 1 A). The part maintains 400 V reverse voltage and is optimized for switching power supply applications through the onsemi SWITCHMODE™ series designation. Reverse recovery time (65 ns) is faster than FR104-TP, and the part is available in high inventory (10,400 pcs).

Q: What is the significance of the "G" suffix in part numbers like FR104G and FR104G A0G?

A: The "G" suffix indicates a specific manufacturing variant or grade designation from Taiwan Semiconductor Corporation. Both FR104G and FR104G A0G maintain identical electrical specifications (400 V, 1 A, 1.3 V forward voltage, 150 ns recovery time) and are Active products with ROHS3 compliance. The "A0G" designation in FR104G A0G represents an additional manufacturing code. Both parts are suitable for direct substitution.

Q: Are there packaging format differences that affect selection?

A: Yes. Packaging formats include Tape & Reel (TR) for automated pick-and-place assembly, Cut Tape (CT) for semi-automated or manual processes, and bulk packaging. FR104GP-TP and FR104T-G are supplied in Tape & Reel format. SF16G-TP and UF4004GP-TP are supplied in Cut Tape format. FR104G R1G is supplied in bulk. Selection depends on assembly process requirements and production volume.

Q: Does UF4004HR1G offer advantages over standard equivalents?

A: UF4004HR1G includes automotive-grade qualification (AEC-Q101) and is manufactured by Taiwan Semiconductor Corporation. It features lower forward voltage drop (1.0 V versus 1.3 V) and faster reverse recovery (50 ns versus 150 ns) compared to FR104-TP. These characteristics make it suitable for automotive applications and designs where reduced power dissipation is required.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed maintain ROHS3 compliance and are classified with Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements. Operating temperature ranges are -55°C to 150°C for most parts, with MUR240RLG extending to -65°C to 175°C. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

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