HER308G-TP Equivalent & Substitute Parts

Part Overview

The HER308G-TP is a general-purpose rectifier diode rated for 1000 V DC reverse voltage with 3 A average rectified current. Manufactured by Micro Commercial Co, this through-hole component features fast recovery characteristics with a reverse recovery time of 75 ns and is housed in a DO-201AD axial package. The device is RoHS3 compliant and currently active in production with 698 pieces in stock.

Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, manufacturer availability, or packaging format preferences while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.7 @ 3 A	V
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	10	µA @ 1000 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
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 eligibility for the HER308G-TP is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 3 A
Voltage - Forward (Vf) (Max) @ If: 1.7 V @ 3 A
Reverse Recovery Time (trr): 75 ns
Current - Reverse Leakage @ Vr: 10 µA @ 1000 V
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Compatibility Requirements:

Mounting Type: Through Hole
Package / Case: DO-201AD or DO-27 Axial
Operating Temperature - Junction: -55°C to 150°C

Compliance Requirements:

RoHS Status: ROHS3 Compliant
Technology: Standard

Substitute parts must meet or exceed all electrical parameters and maintain through-hole axial mounting compatibility. Packaging format variations (Tape & Reel, Cut Tape, Tape & Box) are acceptable provided the component footprint and lead configuration remain compatible with DO-201AD or DO-27 specifications.

Parameter Comparison

Parameter	HER308G-TP (Main)	UF5408GP-TP	HER308G	UF5408-E3/54	UF5408-E3/73
Manufacturer	Micro Commercial Co	Micro Commercial Co	HY Electronic (Cayman) Limited	Vishay General Semiconductor	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	1000 V	1000 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 3 A	1.7 V @ 3 A	1.7 V @ 3 A	1.7 V @ 3 A	1.7 V @ 3 A
Reverse Recovery Time (trr)	75 ns	75 ns	75 ns	75 ns	75 ns
Current - Reverse Leakage @ Vr	10 µA @ 1000 V	10 µA @ 1000 V	5 µA @ 1000 V	10 µA @ 1000 V	10 µA @ 1000 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AA, DO-27, Axial	DO-201AD, Axial	DO-201AD, Axial
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active
Inventory (Pcs)	698	1788	1420	61860	10200

Engineering Selection Recommendations

All identified substitute parts maintain full electrical and mechanical compatibility with the HER308G-TP. Selection among alternatives is based on the following factors:

Packaging Format Considerations:

HER308G-TP and UF5408GP-TP are supplied in Tape & Reel (TR) and Cut Tape (CT) formats respectively, suitable for automated assembly processes.
HER308G is supplied in Tape & Box (TB) format, appropriate for manual or semi-automated assembly.
UF5408-E3/54 and UF5408-E3/73 are supplied in Cut Tape (CT) format with high inventory availability.

Compliance and Regulatory Status:

All substitute parts are RoHS3 compliant and REACH unaffected or vendor undefined, meeting current environmental and regulatory requirements.
All parts are classified as Active products with ongoing manufacturer support.

Inventory Availability:

UF5408-E3/54 offers the highest inventory level at 61,860 pieces, providing maximum supply chain security.
UF5408-E3/73 provides 10,200 pieces with equivalent electrical specifications.
HER308G and UF5408GP-TP offer intermediate inventory levels of 1,420 and 1,788 pieces respectively.

Package Compatibility:

UF5408-E3/54, UF5408-E3/73, and UF5408GP-TP maintain DO-201AD package specification identical to the main part.
HER308G uses DO-27 package, which is mechanically compatible but represents a different physical form factor.

Frequently Asked Questions (FAQ)

Q: Can UF5408-E3/54 be used as a direct replacement for HER308G-TP in existing circuit boards?

A: Yes. UF5408-E3/54 meets all electrical specifications (1000 V, 3 A, 75 ns recovery time) and maintains the DO-201AD axial package format. The primary difference is the packaging format (Cut Tape versus Tape & Reel), which does not affect circuit board compatibility.

Q: What is the difference between HER308G and HER308G-TP?

A: Both parts are electrically identical with 1000 V, 3 A ratings and 75 ns reverse recovery time. The primary difference is packaging: HER308G-TP uses Tape & Reel format while HER308G uses Tape & Box format. HER308G also uses DO-27 package instead of DO-201AD, resulting in slightly different physical dimensions.

Q: Are there any performance differences between the Micro Commercial Co and Vishay versions?

A: All substitute parts meet identical electrical specifications for voltage, current, and recovery time. Minor variations exist in reverse leakage current (5 µA for HER308G versus 10 µA for others) and capacitance values, but these remain within acceptable operating parameters for general-purpose rectification applications.

Q: Which substitute part offers the best supply chain security?

A: UF5408-E3/54 provides the highest inventory availability at 61,860 pieces, offering maximum supply continuity. This part is manufactured by Vishay General Semiconductor and maintains full electrical and mechanical compatibility with HER308G-TP.

Q: Can HER308G be used if DO-27 package is acceptable in the application?

A: Yes. HER308G maintains all critical electrical parameters and through-hole mounting compatibility. The DO-27 package is mechanically compatible with DO-201AD footprints in most applications, though physical lead spacing differs slightly. Circuit board layout verification is necessary to confirm mechanical fit.

Q: What packaging formats are available for these substitute parts?

A: HER308G-TP is supplied in Tape & Reel (TR) format. UF5408GP-TP, UF5408-E3/54, and UF5408-E3/73 are supplied in Cut Tape (CT) format. HER308G is supplied in Tape & Box (TB) format. All formats are compatible with standard component handling and assembly equipment.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts carry RoHS3 compliance certification, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

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