ER306-AP Equivalent & Substitute Parts

Part Overview

The ER306-AP is a general-purpose rectifier diode rated for 600 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V
Package / Case	DO-201AD, Axial
Mounting Type	Through Hole
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the ER306-AP are classified based on electrical parameter compatibility and physical form factor. All substitute parts maintain the same 600 V reverse voltage rating, 3 A average rectified current, and DO-201AD axial through-hole package configuration. Substitution is determined by the following key parameters:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole

Secondary Parameters Affecting Performance:

Voltage - Forward (Vf) (Max) @ If: 1.7 V or lower @ 3 A
Reverse Recovery Time (trr): 35 ns to 75 ns
Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 600 V
Operating Temperature - Junction: -55°C to -65°C minimum, 150°C maximum

Parts are grouped into two categories: direct substitutes with identical reverse recovery time (35 ns) and parametric equivalents with extended reverse recovery time (75 ns). All substitute parts are active products with ROHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max)	Io	Vf (Max) @ If	trr (ns)	Ir @ Vr	Packaging
ER306-AP	Micro Commercial Co	Obsolete	600 V	3 A	1.7 V @ 3 A	35	5 µA @ 600 V	-
SF38G-AP	Micro Commercial Co	Active	600 V	3 A	1.75 V @ 3 A	35	5 µA @ 600 V	Tape & Box (TB)
HER306G-AP	Micro Commercial Co	Active	600 V	3 A	1.7 V @ 3 A	75	10 µA @ 600 V	-
UF5406GP-AP	Micro Commercial Co	Active	600 V	3 A	1.7 V @ 3 A	75	10 µA @ 600 V	Tape & Box (TB)
HER306G A0G	Taiwan Semiconductor Corporation	Active	600 V	3 A	1.7 V @ 3 A	75	10 µA @ 600 V	-
SF38G A0G	Taiwan Semiconductor Corporation	Active	600 V	3 A	1.7 V @ 3 A	35	5 µA @ 600 V	Cut Tape (CT)
SF38GHA0G	Taiwan Semiconductor Corporation	Active	600 V	3 A	1.7 V @ 3 A	35	5 µA @ 600 V	-
UF5406-E3/73	Vishay General Semiconductor - Diodes Division	Active	600 V	3 A	1.7 V @ 3 A	75	10 µA @ 600 V	Cut Tape (CT)

Engineering Selection Recommendations

Direct Substitutes (Identical Reverse Recovery Time - 35 ns):

SF38G-AP and SF38G A0G are direct substitutes for the ER306-AP. Both maintain the 35 ns reverse recovery time specification and 5 µA reverse leakage current. SF38G-AP is manufactured by Micro Commercial Co and available in Tape & Box packaging. SF38G A0G is manufactured by Taiwan Semiconductor Corporation and available in Cut Tape packaging. Both are active products with ROHS3 compliance.

SF38GHA0G, also manufactured by Taiwan Semiconductor Corporation, is an automotive-grade variant qualified to AEC-Q101. This part maintains identical electrical specifications to SF38G A0G and is suitable for applications requiring automotive qualification.

Parametric Equivalents (Extended Reverse Recovery Time - 75 ns):

HER306G-AP, UF5406GP-AP, HER306G A0G, and UF5406-E3/73 are parametric equivalents with 75 ns reverse recovery time. These parts maintain the 600 V reverse voltage and 3 A current ratings but exhibit higher reverse leakage current (10 µA @ 600 V) compared to the original specification (5 µA @ 600 V). All are active products with ROHS3 compliance.

HER306G-AP and UF5406GP-AP are manufactured by Micro Commercial Co. HER306G A0G is manufactured by Taiwan Semiconductor Corporation. UF5406-E3/73 is manufactured by Vishay General Semiconductor - Diodes Division and available in Cut Tape packaging with the highest inventory availability (4100 pcs).

Selection Criteria:

For applications requiring exact electrical performance match, select SF38G-AP, SF38G A0G, or SF38GHA0G. For applications where extended reverse recovery time is acceptable, select from the parametric equivalent group. For automotive applications, SF38GHA0G is the appropriate selection. For maximum inventory availability, UF5406-E3/73 is recommended.

Frequently Asked Questions (FAQ)

Q: Can SF38G-AP be used as a direct replacement for ER306-AP?

A: Yes. SF38G-AP maintains identical reverse recovery time (35 ns), reverse leakage current (5 µA @ 600 V), and forward voltage (1.7 V @ 3 A) specifications. The primary difference is packaging format (Tape & Box versus bulk).

Q: What is the difference between the 35 ns and 75 ns reverse recovery time variants?

A: The ER306-AP and SF38G series have 35 ns reverse recovery time. The HER306G and UF5406 series have 75 ns reverse recovery time. Extended reverse recovery time results in higher reverse leakage current (10 µA versus 5 µA @ 600 V). Selection depends on circuit switching speed requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and suitable for applications requiring environmental compliance.

Q: What is the difference between SF38G A0G and SF38GHA0G?

A: SF38GHA0G is an automotive-grade variant qualified to AEC-Q101. Both maintain identical electrical specifications (600 V, 3 A, 35 ns trr, 5 µA Ir). SF38GHA0G is appropriate for automotive applications requiring AEC-Q101 qualification.

Q: Which substitute part has the highest inventory availability?

A: UF5406-E3/73 manufactured by Vishay General Semiconductor - Diodes Division has 4100 pcs in stock, significantly higher than other alternatives.

Q: Can parts from different manufacturers be mixed in the same design?

A: All substitute parts maintain identical electrical ratings (600 V, 3 A) and package configuration (DO-201AD axial through-hole). Parts from Micro Commercial Co, Taiwan Semiconductor Corporation, and Vishay General Semiconductor - Diodes Division are electrically compatible within their respective parameter groups.

Q: Is the forward voltage difference between 1.7 V and 1.75 V significant?

A: SF38G-AP specifies 1.75 V @ 3 A forward voltage compared to 1.7 V @ 3 A for the ER306-AP. This 0.05 V difference is within typical manufacturing tolerance and does not affect circuit functionality in standard rectifier applications.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tape & Box (TB), Cut Tape (CT), and bulk. All maintain the same DO-201AD axial through-hole component form factor. Packaging selection depends on production volume and assembly requirements.

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