SF18G-TP Equivalent & Substitute Parts

Part Overview

The SF18G-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 600 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. This component is classified as Active and complies with ROHS3 and REACH standards. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and regulatory compliance are maintained across alternative manufacturers and packaging configurations.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
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 SF18G-TP are qualified based on the following criteria:

Electrical Parameters (Critical):

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1 A
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction: -55°C ~ 150°C

Mechanical Parameters (Critical):

Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, Axial

Regulatory Compliance (Required):

RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected
Product Status: Active

The FR105G and FR105G A0G, both manufactured by Taiwan Semiconductor Corporation, meet all critical electrical and mechanical parameters. Both parts are supplied in DO-204AL (DO-41) axial through-hole packages and maintain full regulatory compliance.

Parameter Comparison

Parameter	SF18G-TP (Micro Commercial Co)	FR105G (Taiwan Semiconductor)	FR105G A0G (Taiwan Semiconductor)
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V
Current - Average Rectified (Io)	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	35 ns	250 ns	250 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V
Capacitance @ Vr, F	20 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

SF18G-TP (Primary Part): The SF18G-TP is an Active product with ROHS3 compliance and REACH unaffected status. This part is suitable for new designs and ongoing production applications requiring 600 V, 1 A general-purpose rectification in through-hole configuration.

FR105G (Substitute): The FR105G is an Active product with ROHS3 compliance and REACH unaffected status. This part meets all critical electrical and mechanical parameters and is supplied in Cut Tape packaging. The FR105G is suitable for direct substitution in applications where the SF18G-TP is unavailable.

FR105G A0G (Substitute): The FR105G A0G is an Active product with ROHS3 compliance and REACH unaffected status. This part meets all critical electrical and mechanical parameters and is supplied in Cut Tape packaging. The FR105G A0G is suitable for direct substitution in applications where the SF18G-TP is unavailable.

All three parts maintain identical voltage ratings, current ratings, forward voltage characteristics, and operating temperature ranges. Packaging format differences (Tape & Reel versus Cut Tape) do not affect electrical performance or mechanical fit in through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can FR105G and FR105G A0G be used interchangeably with SF18G-TP?

A: Yes. All three parts share identical electrical ratings (600 V, 1 A), forward voltage characteristics (1.3 V @ 1 A), speed classification (Fast Recovery ≤ 500ns), operating temperature range (-55°C ~ 150°C), and through-hole DO-41 package configuration. All parts are ROHS3 compliant and REACH unaffected.

Q: What is the difference between SF18G-TP and FR105G?

A: The primary differences are manufacturer (Micro Commercial Co versus Taiwan Semiconductor Corporation) and packaging format (Tape & Reel versus Cut Tape). The reverse recovery time (trr) differs: SF18G-TP is 35 ns while FR105G is 250 ns. The capacitance also differs: SF18G-TP is 20 pF while FR105G is 10 pF. All critical electrical ratings and mechanical compatibility remain identical.

Q: Are FR105G and FR105G A0G different parts?

A: FR105G and FR105G A0G are both manufactured by Taiwan Semiconductor Corporation and share identical electrical specifications, operating temperature ranges, and package configurations. Both are suitable substitutes for SF18G-TP.

Q: Does packaging format affect substitution compatibility?

A: Packaging format (Tape & Reel versus Cut Tape) affects supply and handling but does not affect electrical performance or mechanical fit. Both formats are compatible with through-hole assembly processes.

Q: Are all substitute parts currently in stock?

A: Inventory status is subject to change. FR105G has 10,952 pieces in stock and FR105G A0G has 5,309 pieces in stock. Current availability should be confirmed at time of procurement.

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