Equivalent & Substitute Parts for 1F1G-TP

Part Overview

The 1F1G-TP 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 an R-1 axial through-hole package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for continued system support and procurement.

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 @ 1	V @ A
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5 @ 50	µA @ V
Mounting Type	Through Hole	—
Package / Case	R-1, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 1F1G-TP is determined by electrical and mechanical parameter equivalence within the general-purpose rectifier diode category. The following parameters establish substitution eligibility:

Critical Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 50 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 @ 50 V

Critical Mechanical Parameters:

Mounting Type: Through Hole
Package / Case: R-1, Axial

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Technology: Standard

The substitute part 1F1 meets all critical electrical and mechanical parameters, enabling direct functional replacement in applications requiring a 50 V, 1 A general-purpose rectifier diode in R-1 axial through-hole configuration.

Parameter Comparison

Parameter	1F1G-TP (Main Part)	1F1 (Substitute)	Match Status
Manufacturer	Micro Commercial Co	SMC Diode Solutions	Different Manufacturer
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	Equivalent
Current - Average Rectified (Io)	1 A	1 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.3 V @ 1 A	Equivalent
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Equivalent
Reverse Recovery Time (trr)	150 ns	150 ns	Equivalent
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	Equivalent
Capacitance @ Vr, F	12 pF @ 4V, 1MHz	15 pF @ 4V, 1MHz	Within Tolerance
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	R-1, Axial	R-1, Axial	Equivalent
Operating Temperature - Junction	-55°C ~ 150°C	-65°C ~ 150°C	Substitute Exceeds Range
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute Active

Engineering Selection Recommendations

The 1F1 manufactured by SMC Diode Solutions is a direct electrical and mechanical equivalent to the obsolete 1F1G-TP. Selection of the 1F1 substitute is supported by the following factors:

Electrical Equivalence: All critical electrical parameters match the original specification, including reverse voltage rating, forward current capacity, forward voltage drop, and reverse recovery characteristics.

Mechanical Compatibility: Both components utilize identical R-1 axial through-hole packaging, enabling direct board-level substitution without layout modifications.

Compliance Status: The 1F1 maintains ROHS3 compliance equivalent to the original part, satisfying regulatory requirements for new procurement.

Product Availability: The 1F1 maintains active product status with current inventory availability, addressing the obsolescence of the original 1F1G-TP.

Temperature Performance: The 1F1 provides an extended lower operating temperature limit (-65°C versus -55°C), offering improved performance margin in low-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the 1F1 directly replace the 1F1G-TP in existing designs?

A: Yes. The 1F1 meets all critical electrical parameters (50 V reverse voltage, 1 A current rating, 1.3 V forward voltage, 150 ns reverse recovery time) and uses identical R-1 axial through-hole packaging, enabling direct substitution without circuit modification.

Q: What is the significance of the capacitance difference between the two parts?

A: The 1F1 exhibits 15 pF capacitance compared to 12 pF in the 1F1G-TP, both measured at 4 V and 1 MHz. This 3 pF difference is within normal manufacturing tolerance for general-purpose rectifier diodes and does not affect functional compatibility in standard applications.

Q: Why is the 1F1G-TP classified as obsolete?

A: The 1F1G-TP is designated obsolete by Micro Commercial Co, indicating discontinued manufacturing and end-of-life status. The 1F1 from SMC Diode Solutions provides equivalent electrical and mechanical performance with active product status and current availability.

Q: Are there packaging differences between the main part and substitute?

A: Both the 1F1G-TP and 1F1 use R-1 axial through-hole packaging. The 1F1G-TP is supplied in standard packaging, while the 1F1 is available in Tape & Box (TB) format. Both formats accommodate identical component dimensions and board-level installation procedures.

Q: Does the extended temperature range of the 1F1 affect compatibility?

A: The 1F1 operating temperature range (-65°C to 150°C) exceeds the 1F1G-TP specification (-55°C to 150°C). This extended range provides additional performance margin and does not create compatibility issues in applications within the original temperature specification.

Q: What compliance certifications apply to the 1F1 substitute?

A: The 1F1 is ROHS3 compliant and maintains Moisture Sensitivity Level 1 (unlimited), matching the compliance profile of the original 1F1G-TP. Both components are classified under HTSUS code 8541.10.0080 and ECCN EAR99.

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