SF16G-AP Equivalent & Substitute Parts

Part Overview

The SF16G-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 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. Equivalent and substitute parts are identified based on matching electrical ratings, package compatibility, and operational specifications to ensure functional interchangeability in circuit applications.

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
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	35 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 SF16G-AP are qualified based on the following criteria:

Electrical Equivalence: All substitute parts maintain the same maximum reverse voltage rating (400 V) and average rectified current rating (1 A), ensuring compatibility in circuits designed for the SF16G-AP.

Package Compatibility: Substitute parts utilize through-hole mounting with DO-41 or DO-204AL (DO-41) package designations, permitting direct physical replacement on printed circuit boards.

Operational Characteristics: All substitutes operate within the same temperature range (-55°C to 150°C junction temperature) and maintain fast recovery speed classification (≤ 500ns, > 200mA).

Compliance Standards: All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the main part.

Technology Classification: All parts utilize standard rectifier diode technology without specialized variants.

Parameter Comparison

Parameter	SF16G-AP (Micro Commercial Co)	UF4004-M3/73 (Vishay)	FR104G A0G (Taiwan Semiconductor)	UF4005-G (Comchip Technology)
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Reverse Recovery Time (trr)	35 ns	50 ns	150 ns	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	10 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Capacitance @ Vr, F	10 pF @ 4V, 1MHz	17 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz	20 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
Product Status	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status)

The UF4004-M3/73 (Vishay General Semiconductor - Diodes Division) and FR104G A0G (Taiwan Semiconductor Corporation) are qualified as primary substitutes for the SF16G-AP. Both parts maintain Active product status, ensuring ongoing manufacturer support and supply chain availability. The UF4004-M3/73 exhibits a lower forward voltage drop (1 V @ 1 A) compared to the SF16G-AP (1.3 V @ 1 A), resulting in reduced power dissipation in rectification applications. The FR104G A0G maintains identical forward voltage and reverse leakage characteristics to the SF16G-AP, providing direct electrical equivalence.

Secondary Substitute (Obsolete Status)

The UF4005-G (Comchip Technology) is classified as Obsolete and should be selected only when supply constraints on active alternatives exist. While electrically equivalent to the SF16G-AP, the obsolete status indicates discontinued manufacturer support and potential long-term supply limitations.

Compliance Verification

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the SF16G-AP. Selection among active substitutes does not introduce compliance risk.

Frequently Asked Questions (FAQ)

Q: Can the UF4004-M3/73 directly replace the SF16G-AP in existing circuit designs?

A: Yes. The UF4004-M3/73 maintains identical maximum reverse voltage (400 V), average rectified current (1 A), operating temperature range (-55°C to 150°C), and through-hole DO-41 package configuration. The lower forward voltage (1 V vs. 1.3 V) represents an improvement in rectification efficiency without introducing compatibility issues.

Q: What is the significance of the reverse recovery time (trr) differences among the substitute parts?

A: Reverse recovery time affects switching speed and switching losses in high-frequency rectification circuits. The SF16G-AP exhibits 35 ns trr, the UF4004-M3/73 and UF4005-G exhibit 50 ns, and the FR104G A0G exhibits 150 ns. All values fall within the fast recovery classification (≤ 500ns, > 200mA). Selection depends on circuit switching frequency requirements; faster recovery times reduce switching losses in high-frequency applications.

Q: Are there package differences between the SF16G-AP and its substitutes?

A: All parts utilize through-hole mounting with DO-41 or DO-204AL (DO-41) package designations. The SF16G-AP is supplied in Tape & Box packaging, while UF4004-M3/73, FR104G A0G, and UF4005-G are supplied in Cut Tape packaging. Physical dimensions and pin configurations are compatible for direct board-level replacement.

Q: Why is the UF4005-G listed as a substitute if it is Obsolete?

A: The UF4005-G is electrically and mechanically equivalent to the SF16G-AP and remains available in inventory (8680 Pcs). Obsolete status indicates discontinued manufacturer support; however, existing stock may be utilized when active alternatives are unavailable. Long-term supply reliability should be evaluated before selecting obsolete parts.

Q: How do capacitance variations affect substitution suitability?

A: Capacitance values range from 10 pF (SF16G-AP, FR104G A0G) to 20 pF (UF4005-G) at 4 V, 1 MHz. These variations affect high-frequency circuit behavior and EMI characteristics. In low-frequency rectification applications, capacitance differences are negligible. High-frequency switching applications should evaluate capacitance impact on circuit performance.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the SF16G-AP. No additional compliance verification is required when substituting among these parts.

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