HER108-TP Equivalent & Substitute Parts

Part Overview

The HER108-TP is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete product status, identifying equivalent substitute parts with identical electrical and mechanical specifications is necessary for design continuity and procurement planning. The HER108G-TP provides a direct functional equivalent with active product status.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A
Reverse Recovery Time (trr)	75 ns
Current - Reverse Leakage @ Vr	5 µA @ 1000 V
Capacitance @ Vr, F	15 pF @ 4V, 1MHz
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Standard
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)

Substitute Part Grouping Explanation

Substitution of the HER108-TP is determined by equivalence across the following critical parameters:

Voltage Rating: DC reverse voltage of 1000 V maximum
Current Rating: Average rectified current of 1 A
Forward Voltage Drop: 1.7 V maximum at 1 A forward current
Reverse Recovery Time: 75 ns
Reverse Leakage Current: 5 µA at 1000 V
Package Type: DO-41 through-hole axial configuration
Operating Temperature Range: -55°C to 125°C junction temperature
Technology Classification: Standard rectifier diode with fast recovery characteristics

The HER108G-TP meets all specified electrical and mechanical parameters. The primary distinction between the main part and its substitute is packaging format and product status.

Parameter Comparison

Parameter	HER108-TP	HER108G-TP	Match
Manufacturer	Micro Commercial Co	Micro Commercial Co	Yes
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	Yes
Current - Average Rectified (Io)	1 A	1 A	Yes
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A	1.7 V @ 1 A	Yes
Reverse Recovery Time (trr)	75 ns	75 ns	Yes
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	5 µA @ 1000 V	Yes
Capacitance @ Vr, F	15 pF @ 4V, 1MHz	15 pF @ 4V, 1MHz	Yes
Mounting Type	Through Hole	Through Hole	Yes
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	Yes
Operating Temperature - Junction	-55°C ~ 125°C	-55°C ~ 125°C	Yes
Technology	Standard	Standard	Yes
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Yes
Product Status	Obsolete	Active	Different
Packaging Format	Bulk	Tape & Reel (TR)	Different
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes

Engineering Selection Recommendations

The HER108G-TP is a direct electrical and mechanical equivalent to the HER108-TP. Selection between these parts is determined by the following factors:

Product Status: The HER108-TP is classified as obsolete, while the HER108G-TP maintains active product status. For new designs or long-term procurement requirements, the HER108G-TP is the appropriate selection.

Compliance: Both parts are ROHS3 compliant and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8541.10.0080). Both are unaffected by REACH regulations where applicable.

Packaging Format: The HER108-TP is supplied in bulk packaging, while the HER108G-TP is supplied in Tape & Reel (TR) format. Packaging selection depends on assembly process requirements and volume considerations.

Inventory Availability: The HER108-TP has 745 pieces in stock; the HER108G-TP has 661 pieces in stock. Both are available as new original components.

All electrical parameters, thermal specifications, and mechanical dimensions are identical between the two parts, ensuring direct functional substitution in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the HER108G-TP replace the HER108-TP in existing designs?

A: Yes. The HER108G-TP is electrically and mechanically identical to the HER108-TP. All voltage ratings, current ratings, forward voltage characteristics, reverse recovery time, leakage current, capacitance, and operating temperature ranges are equivalent. The DO-41 through-hole package dimensions and pinout are identical.

Q: What is the difference between HER108-TP and HER108G-TP?

A: The primary differences are product status and packaging format. The HER108-TP is obsolete and supplied in bulk packaging. The HER108G-TP is an active product supplied in Tape & Reel (TR) format. All electrical and mechanical specifications are identical.

Q: Are there any compliance or certification differences?

A: No. Both parts carry identical RoHS3 compliance status, ECCN classification (EAR99), and HTSUS codes. Both are unaffected by REACH regulations where applicable.

Q: Does the Tape & Reel packaging of the HER108G-TP affect circuit performance?

A: No. Packaging format does not affect electrical performance. The Tape & Reel format is a supply and handling specification only. The actual component specifications and performance characteristics are identical to bulk-packaged versions.

Q: What are the critical parameters for substitution of HER108-TP class diodes?

A: Substitution requires matching of: DC reverse voltage (1000 V), average rectified current (1 A), forward voltage drop (1.7 V @ 1 A), reverse recovery time (75 ns), reverse leakage current (5 µA @ 1000 V), operating temperature range (-55°C to 125°C), and DO-41 through-hole package configuration.

Q: Is the HER108-TP still available for procurement?

A: The HER108-TP is classified as obsolete. However, 745 pieces are currently in stock as new original components. For ongoing or future procurement, the HER108G-TP is the recommended active product equivalent.

Q: Can I use the HER108G-TP in high-temperature applications?

A: Yes. The HER108G-TP is rated for junction temperatures from -55°C to 125°C, identical to the HER108-TP. This operating range applies to both parts.

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