HER106-TP Equivalent & Substitute Parts

Part Overview

The HER106-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 600 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 axial package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The fast recovery characteristics (≤500 ns) and 75 ns reverse recovery time position this diode for use in switching power supplies and general rectification circuits requiring moderate current handling.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A	V
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	5	mA @ 600 V
Speed Classification	Fast Recovery ≤500 ns, >200 mA	-
Mounting Type	Through Hole	-
Package / Case	DO-204AL, DO-41, Axial	-
Operating Temperature - Junction	-55 to 125	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the HER106-TP is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 600 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, or Axial compatible
Speed Classification: Fast Recovery ≤500 ns, >200 mA

Secondary Compatibility Factors:

Operating Temperature Range: Must accommodate application requirements
RoHS Compliance: ROHS3 Compliant status maintained
Reverse Recovery Time (trr): Lower values indicate improved switching performance

The substitute parts listed below meet or exceed the electrical specifications of the HER106-TP while maintaining through-hole axial package compatibility. Current ratings of 2 A represent uprated alternatives suitable for applications requiring higher current capacity within the same voltage class.

Parameter Comparison

Parameter	HER106-TP (Main)	1N4937RLG	MUR260RLG	STTH2L06
Manufacturer	Micro Commercial Co	onsemi	onsemi	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	1 A	1 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A	1.2 V @ 1 A	1.35 V @ 2 A	1.3 V @ 2 A
Reverse Recovery Time (trr)	75 ns	300 ns	75 ns	85 ns
Current - Reverse Leakage @ Vr	5 mA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	2 µA @ 600 V
Speed Classification	Fast Recovery ≤500 ns, >200 mA	Fast Recovery ≤500 ns, >200 mA	Fast Recovery ≤500 ns, >200 mA	Fast Recovery ≤500 ns, >200 mA
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55 to 125°C	-65 to 150°C	-65 to 175°C	Max 175°C
Product Status	Obsolete	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

1N4937RLG (onsemi)

The 1N4937RLG provides electrical equivalence at the 1 A current rating with identical 600 V reverse voltage specification. This part carries "Not For New Designs" status, indicating limited long-term availability. Selection of this substitute is appropriate for direct replacement in existing designs where 1 A current capacity is sufficient. The 300 ns reverse recovery time is slower than the HER106-TP, which may impact switching frequency performance in high-speed applications.

MUR260RLG (onsemi) - Recommended for Active Production

The MUR260RLG is classified as Active product status, ensuring continued availability and supply chain stability. This part exceeds the HER106-TP current rating at 2 A while maintaining identical 600 V reverse voltage and superior 75 ns reverse recovery time matching the original specification. The extended operating temperature range (-65 to 175°C) provides thermal margin beyond the HER106-TP. ROHS3 compliance and REACH Unaffected status confirm regulatory alignment. This substitute is suitable for new designs and ongoing production requiring 600 V, 1-2 A rectification.

STTH2L06 (STMicroelectronics) - Recommended for Active Production

The STTH2L06 is classified as Active product status with robust supply availability (2400 pcs in stock). This part matches the HER106-TP package specification (DO-41) and exceeds current rating at 2 A. The 85 ns reverse recovery time remains within fast recovery classification and closely matches the original 75 ns specification. Superior reverse leakage characteristics (2 µA vs. 5 mA) indicate improved performance. ROHS3 compliance and REACH Unaffected status confirm regulatory alignment. This substitute is suitable for new designs and ongoing production requiring 600 V, 1-2 A rectification with DO-41 package preference.

Frequently Asked Questions (FAQ)

Q: Can the HER106-TP be replaced with a 2 A rated diode in a 1 A application?

A: Yes. The MUR260RLG and STTH2L06 are rated for 2 A average rectified current and operate within the same 600 V reverse voltage class. A higher current rating does not degrade performance in lower current applications. The diode will operate at reduced stress levels, potentially improving reliability and thermal performance.

Q: What is the difference between the 1N4937RLG and the MUR260RLG?

A: Both parts meet the 600 V, 1 A minimum specification. The 1N4937RLG is rated for 1 A, while the MUR260RLG is rated for 2 A. The MUR260RLG has superior reverse recovery time (75 ns vs. 300 ns) and Active product status, ensuring long-term availability. The MUR260RLG is preferred for new designs.

Q: Are all substitute parts compatible with the original DO-41 package footprint?

A: Yes. All substitute parts are specified for DO-204AL, DO-41, and Axial package compatibility. Physical dimensions and lead spacing conform to the same through-hole axial standard, enabling direct board-level substitution without layout modification.

Q: Does the forward voltage difference between parts affect circuit operation?

A: Forward voltage differences (1.7 V for HER106-TP vs. 1.2-1.35 V for substitutes) are typically negligible in rectification circuits where forward voltage drop represents a small fraction of total circuit voltage. In precision applications where forward voltage is critical, circuit simulation or testing is required to confirm acceptable performance margins.

Q: What is the significance of reverse recovery time in substitute selection?

A: Reverse recovery time (trr) determines switching speed and affects efficiency in high-frequency switching applications. The HER106-TP specifies 75 ns. The MUR260RLG and STTH2L06 maintain 75-85 ns performance, ensuring equivalent switching characteristics. The 1N4937RLG at 300 ns is slower and may reduce efficiency in applications operating above 50 kHz.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 Compliant certification, maintaining regulatory alignment with the original HER106-TP specification.

Q: Which substitute part offers the best long-term supply availability?

A: The MUR260RLG (onsemi) and STTH2L06 (STMicroelectronics) both carry Active product status with substantial inventory levels (80,300 pcs and 2,400 pcs respectively), ensuring continued availability for production and maintenance applications. The 1N4937RLG carries "Not For New Designs" status, indicating limited future availability.

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