HER301G-TP Equivalent & Substitute Parts

Part Overview

The HER301G-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original part is no longer available or procurement is limited.

Substiute Parts

HER301G-TP

Micro Commercial CoIn Stock: 1002HER301G-TP Datasheet

Current PartRFQ

EGP30A

Fairchild SemiconductorIn Stock: 4600EGP30A Datasheet

SimilarRFQ

UF300G_R2_00001

Panjit International Inc.In Stock: 921UF300G_R2_00001 Datasheet

Parametric EquivalentRFQ

UF5400-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 4677UF5400-E3/54 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HER301G-TP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 50 V
• Current - Average Rectified (Io): 3 A
• Package / Case: DO-201AD, Axial
• Mounting Type: Through Hole
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Reverse Recovery Time (trr): 50 ns

Allowable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: ±50 mV tolerance acceptable
• Current - Reverse Leakage @ Vr: Within 10 µA @ 50 V specification
• Capacitance @ Vr, F: Within 80 pF ± 15 pF @ 4V, 1MHz
• Operating Temperature - Junction: Equal or extended range acceptable

All substitute parts listed below meet or exceed the mandatory matching parameters and fall within allowable variation ranges for secondary electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

EGP30A (Fairchild Semiconductor)

The EGP30A is a direct parametric equivalent with identical voltage, current, and forward voltage specifications. This part is in active production status, ensuring long-term availability. The operating temperature range extends to -65°C, providing superior low-temperature performance compared to the HER301G-TP. Reverse leakage current is reduced to 5 µA, indicating improved device quality. Packaging is supplied in bulk format, suitable for high-volume procurement. REACH compliance is unaffected. This substitute is appropriate for applications requiring maximum availability and extended temperature performance.

UF300G_R2_00001 (Panjit International Inc.)

The UF300G_R2_00001 is a parametric equivalent with matching voltage, current, and recovery time specifications. Forward voltage is specified at 1 V, representing a 50 mV increase over the HER301G-TP. Reverse leakage current is significantly reduced to 1 µA, indicating superior reverse blocking characteristics. This part is in active production and supplied in Tape & Reel packaging, matching the original packaging format. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) are maintained. This substitute is appropriate for applications where reduced reverse leakage and original packaging format are beneficial.

UF5400-E3/54 (Vishay General Semiconductor - Diodes Division)

The UF5400-E3/54 is a parametric equivalent with matching voltage, current, and recovery time specifications. Forward voltage is specified at 1 V, representing a 50 mV increase over the HER301G-TP. Reverse leakage current matches the original specification at 10 µA. Capacitance is reduced to 45 pF, the lowest among all substitutes, which may provide performance benefits in high-frequency switching applications. This part is in active production and supplied in Cut Tape format. ROHS3 compliance is maintained. This substitute is appropriate for applications where reduced junction capacitance is advantageous.

All three substitute parts are in active production status, ensuring superior long-term availability compared to the HER301G-TP, which is classified as "Not For New Designs."

Frequently Asked Questions (FAQ)

Q: Can the EGP30A be used as a direct replacement for the HER301G-TP?

A: Yes. The EGP30A meets all mandatory matching parameters: 50 V reverse voltage, 3 A average rectified current, DO-201AD package, through-hole mounting, and 50 ns reverse recovery time. Forward voltage is identical at 950 mV @ 3 A. The part is in active production status.

Q: What is the difference between the UF300G_R2_00001 and UF5400-E3/54?

A: Both parts are parametric equivalents with identical voltage, current, and recovery specifications. The primary differences are: (1) UF300G_R2_00001 has reverse leakage of 1 µA and capacitance of 75 pF; (2) UF5400-E3/54 has reverse leakage of 10 µA and capacitance of 45 pF. The UF5400-E3/54 lower capacitance may be beneficial in high-frequency applications. Packaging differs: UF300G_R2_00001 is supplied in Tape & Reel; UF5400-E3/54 is supplied in Cut Tape.

Q: Does forward voltage variation affect substitution compatibility?

A: Forward voltage variation of 50 mV (950 mV to 1 V @ 3 A) is within acceptable engineering tolerance for general-purpose rectifier applications. Both specifications meet the 50 V / 3 A rating class. Applications with strict voltage drop requirements should evaluate the specific forward voltage specification against circuit design margins.

Q: Are all substitute parts RoHS compliant?

A: The UF300G_R2_00001 and UF5400-E3/54 are explicitly ROHS3 compliant. The EGP30A is REACH unaffected. All three parts are suitable for applications requiring environmental compliance.

Q: What is the significance of packaging format differences?

A: The HER301G-TP is supplied in Tape & Reel (TR) format. The EGP30A is supplied in Bulk, the UF300G_R2_00001 in Tape & Reel (TR), and the UF5400-E3/54 in Cut Tape (CT). Packaging format affects procurement quantity minimums, handling, and automated assembly compatibility. For through-hole manual assembly or low-volume repair applications, all formats are functionally equivalent. For automated assembly lines, Tape & Reel or Cut Tape formats are preferred.

Q: Can reverse leakage current differences affect circuit performance?

A: Reverse leakage current ranges from 1 µA (UF300G_R2_00001) to 10 µA (HER301G-TP and UF5400-E3/54) at 50 V. For most general-purpose rectifier applications, this variation is negligible. Applications with extremely high impedance or precision analog circuits may require evaluation of the specific leakage specification against circuit design requirements.

Q: Is the extended temperature range of the EGP30A (-65°C to 150°C) significant?

A: The EGP30A extends the minimum operating temperature to -65°C compared to -55°C for the HER301G-TP. This provides 10°C additional low-temperature margin. For applications operating in standard industrial temperature ranges (-40°C to 85°C), this difference is not significant. For applications requiring extended low-temperature performance, the EGP30A offers superior capability.

Q: Are all substitute parts suitable for new designs?

A: Yes. All three substitute parts (EGP30A, UF300G_R2_00001, UF5400-E3/54) are in active production status, making them suitable for new designs. The HER301G-TP is classified as "Not For New Designs" and should not be used in new applications.