HER306G-TP Equivalent & Substitute Parts

Part Overview

The HER306G-TP 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 "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary to support existing designs, facilitate production continuity, and enable migration to active product lines where applicable.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.7 @ 3 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	10 µA @ 600 V	µA
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the HER306G-TP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

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)
Mounting Type: Through Hole
Package / Case: DO-201AD, Axial
Operating Temperature - Junction: -55°C to 150°C minimum

Secondary Parameters (Allowable Variation):

Reverse Recovery Time (trr): 35 ns to 100 ns
Current - Reverse Leakage @ Vr: 1 µA to 10 µA @ 600 V
Capacitance @ Vr, F: 35 pF to 75 pF @ 4V, 1MHz

All substitute parts listed below meet or exceed the mandatory parameters. Variations in secondary parameters do not affect functional compatibility in standard rectification applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Packaging	Product Status
HER306G-TP	Micro Commercial Co	600	3	1.7 @ 3 A	75	10 @ 600 V	Tape & Reel (TR)	Not For New Designs
UF5406GP-TP	Micro Commercial Co	600	3	1.7 @ 3 A	75	10 @ 600 V	Tape & Reel (TR)	Active
EGP30J	onsemi	600	3	1.7 @ 3 A	75	5 @ 600 V	Cut Tape (CT)	Not For New Designs
ER306_R2_00001	Panjit International Inc.	600	3	1.7 @ 3 A	35	1 @ 600 V	Cut Tape (CT)	Active
HER306G	Taiwan Semiconductor Corporation	600	3	1.7 @ 3 A	75	10 @ 600 V	Cut Tape (CT)	Active
SF38G	Taiwan Semiconductor Corporation	600	3	1.7 @ 3 A	35	5 @ 600 V	Cut Tape (CT)	Active
SF38G A0G	Taiwan Semiconductor Corporation	600	3	1.7 @ 3 A	35	5 @ 600 V	Cut Tape (CT)	Active
SF38GH	Taiwan Semiconductor Corporation	600	3	1.7 @ 3 A	35	5 @ 600 V	Cut Tape (CT)	Active
UF306G_R2_00001	Panjit International Inc.	600	3	1.7 @ 3 A	100	1 @ 600 V	Tape & Reel (TR)	Active
UF5406-E3/54	Vishay General Semiconductor - Diodes Division	600	3	1.7 @ 3 A	75	10 @ 600 V	Cut Tape (CT)	Active
UF5406-E3/73	Vishay General Semiconductor - Diodes Division	600	3	1.7 @ 3 A	75	10 @ 600 V	Cut Tape (CT)	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical and Mechanical Characteristics):

UF5406GP-TP is the primary direct substitute. Manufactured by Micro Commercial Co with identical specifications to HER306G-TP, it maintains the same voltage rating, current capacity, forward voltage drop, and recovery time. UF5406GP-TP is in Active product status and available in Tape & Reel packaging, matching the original packaging format.

For Active Product Line Migration:

HER306G (Taiwan Semiconductor Corporation) and UF5406-E3/73 (Vishay General Semiconductor - Diodes Division) are Active products with identical electrical parameters to the original part. Both are available in Cut Tape packaging and provide long-term design continuity.

For Enhanced Performance Characteristics:

ER306_R2_00001 (Panjit International Inc.), SF38G (Taiwan Semiconductor Corporation), and SF38G A0G (Taiwan Semiconductor Corporation) offer improved reverse recovery time (35 ns versus 75 ns) and reduced reverse leakage current (1 µA to 5 µA versus 10 µA). These parts are Active products suitable for new designs requiring faster switching performance.

For Automotive Applications:

SF38GH (Taiwan Semiconductor Corporation) is qualified to AEC-Q101 automotive standard and is suitable for automotive-grade applications requiring enhanced reliability and traceability.

Compliance Considerations:

All substitute parts listed are ROHS3 Compliant and REACH Unaffected, matching the regulatory status of the original HER306G-TP. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no special moisture handling requirements.

Frequently Asked Questions (FAQ)

Q: Can UF5406GP-TP be used as a direct replacement for HER306G-TP?

A: Yes. UF5406GP-TP is a parametric equivalent with identical voltage rating (600 V), current capacity (3 A), forward voltage (1.7 V @ 3 A), recovery time (75 ns), and reverse leakage current (10 µA @ 600 V). Both are packaged in DO-201AD axial through-hole format and available in Tape & Reel. The primary difference is product status: UF5406GP-TP is Active, while HER306G-TP is Not For New Designs.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Both packaging formats contain the same electronic component in DO-201AD axial through-hole configuration. Tape & Reel (TR) is supplied on continuous tape suitable for automated pick-and-place equipment. Cut Tape (CT) is supplied in shorter tape segments suitable for manual handling or lower-volume applications. Electrical performance is identical between packaging formats.

Q: Why do some substitute parts have lower reverse recovery time (35 ns versus 75 ns)?

A: Reverse recovery time (trr) is a secondary parameter that does not affect functional compatibility in standard rectification applications. Parts with lower trr (35 ns) exhibit faster switching characteristics and lower switching losses, making them suitable for higher-frequency applications. Parts with higher trr (75 ns to 100 ns) are suitable for standard 50/60 Hz power supply applications. Selection depends on circuit operating frequency and switching requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 Compliant and REACH Unaffected, matching the regulatory compliance of the original HER306G-TP.

Q: What does "Not For New Designs" mean for the original HER306G-TP?

A: "Not For New Designs" indicates the part has reached end-of-life status and is no longer recommended for new product development. Existing designs using HER306G-TP can continue to source the part while inventory is available. For new designs or long-term production continuity, migration to Active products such as UF5406GP-TP, HER306G (Taiwan Semiconductor Corporation), or UF5406-E3/73 is recommended.

Q: Can SF38GH be used in non-automotive applications?

A: Yes. SF38GH meets all electrical and mechanical requirements for standard rectification applications. AEC-Q101 automotive qualification indicates enhanced reliability and traceability but does not restrict use to automotive applications. SF38GH is suitable for any application requiring 600 V, 3 A rectification with fast recovery characteristics.

Q: What is the significance of the different reverse leakage current values (1 µA to 10 µA)?

A: Reverse leakage current is a secondary parameter that does not affect functional compatibility in standard rectification applications. Lower reverse leakage current (1 µA) indicates superior device quality and lower standby power consumption. Higher reverse leakage current (10 µA) is within acceptable limits for general-purpose rectification. Selection depends on application requirements for standby power efficiency.

Q: Are there any temperature rating differences between substitute parts?

A: All substitute parts maintain the same operating temperature range of -55°C to 150°C junction temperature, matching the original HER306G-TP. One substitute part (EGP30J from onsemi) extends the lower temperature limit to -65°C, providing enhanced cold-temperature performance if required by the application.

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