MSR860G Equivalent & Substitute Parts

Part Overview

The MSR860G is a general-purpose rectifier diode manufactured by onsemi, rated for 600 V DC reverse voltage and 8 A average rectified current in a through-hole TO-220-2 package. This component is classified as obsolete, indicating that onsemi has discontinued production. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this rectifier diode.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 8 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	120	ns
Current - Reverse Leakage @ Vr	10	µA @ 600 V
Mounting Type	Through Hole	—
Package / Case	TO-220-2	—
Operating Temperature - Junction	-65 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MSR860G is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal 600 V
Current - Average Rectified (Io): Must equal or exceed 8 A
Mounting Type: Must be Through Hole
Package / Case: Must be TO-220-2 or compatible TO-220AC variant
Speed Classification: Must be Fast Recovery ≤ 500ns, > 200mA (Io)
Technology: Must be Standard

Secondary Compatibility Factors:

Reverse Recovery Time (trr): Lower values indicate improved performance characteristics
Voltage - Forward (Vf): Variations within typical operating ranges are acceptable
Current - Reverse Leakage: Lower values indicate superior reverse blocking characteristics
Operating Temperature Range: Must support the application's thermal requirements
Compliance: RoHS3 compliance required for regulatory alignment

Parts are grouped into two categories:

Direct Equivalents (8 A @ 600 V): Parts with identical current and voltage ratings, suitable for direct replacement with minimal circuit impact.

Higher Current Alternatives (≥ 8 A @ 600 V): Parts rated for currents exceeding 8 A at 600 V, providing design margin and thermal headroom while maintaining voltage compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [ns]	Ir @ Vr [µA]	Package	Status
MSR860G	onsemi	600	8	1.7 @ 8A	120	10 @ 600V	TO-220-2	Obsolete
BYC8-600P,127	WeEn Semiconductors	600	8	1.9 @ 8A	18	20 @ 600V	TO-220-2	Active
HERA806G	Taiwan Semiconductor Corporation	600	8	1.7 @ 8A	80	10 @ 600V	TO-220-2	Active
MUR860-BP	Micro Commercial Co	600	8	1.5 @ 8A	50	5 @ 600V	TO-220-2	Active
STTH806D	STMicroelectronics	600	8	1.85 @ 8A	55	8 @ 600V	TO-220-2	Obsolete
STTH8L06D	STMicroelectronics	600	8	1.3 @ 8A	105	8 @ 600V	TO-220-2	Active
VS-HFA08TB60-M3	Vishay General Semiconductor - Diodes Division	600	8	2.1 @ 16A	55	5 @ 600V	TO-220-2	Active
LXA06T600	Power Integrations	600	6	2.94 @ 6A	23	250 @ 600V	TO-220-2	Active
QH03TZ600	Power Integrations	600	3	3 @ 3A	9.8	250 @ 600V	TO-220-2	Active
DSEI25-06A	IXYS	600	25	1.31 @ 25A	50	100 @ 600V	TO-220-2	Active
LQA03TC600	Power Integrations	600	3	3.1 @ 3A	13	20 @ 600V	TO-220-2	Active

Engineering Selection Recommendations

Direct Replacement Candidates (8 A @ 600 V Rating):

The following parts are recommended as direct replacements for the MSR860G based on matching current and voltage specifications with active product status:

HERA806G (Taiwan Semiconductor Corporation): Active status, identical voltage and current ratings, matching forward voltage at rated current (1.7 V @ 8 A), and operating temperature range (-55°C to 150°C). RoHS3 compliant.
MUR860-BP (Micro Commercial Co): Active status, identical voltage and current ratings, superior forward voltage performance (1.5 V @ 8 A), and operating temperature range (-55°C to 150°C). REACH compliant.
STTH8L06D (STMicroelectronics): Active status, identical voltage and current ratings, superior forward voltage (1.3 V @ 8 A), and extended maximum junction temperature (175°C). RoHS3 compliant.
VS-HFA08TB60-M3 (Vishay General Semiconductor - Diodes Division): Active status, identical voltage and current ratings, HEXFRED® series technology, and operating temperature range (-55°C to 150°C). RoHS3 compliant.
BYC8-600P,127 (WeEn Semiconductors): Active status, identical voltage and current ratings, and extended maximum junction temperature (175°C). RoHS3 compliant.

Higher Current Alternatives (≥ 8 A @ 600 V Rating):

DSEI25-06A (IXYS): Active status, 25 A current rating provides significant design margin, identical voltage rating, and operating temperature range (-40°C to 150°C). RoHS3 compliant. Suitable for applications requiring thermal headroom or future current scaling.

Not Recommended for Direct Replacement:

LXA06T600 (Power Integrations): 6 A rating is below the 8 A requirement and does not meet minimum current specifications.
QH03TZ600 (Power Integrations): 3 A rating is below the 8 A requirement and does not meet minimum current specifications.
LQA03TC600 (Power Integrations): 3 A rating is below the 8 A requirement and does not meet minimum current specifications.
STTH806D (STMicroelectronics): Obsolete status limits long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can I use a lower current rated diode as a substitute for the MSR860G?

A: No. The MSR860G is rated for 8 A average rectified current. Substitutes must equal or exceed this rating. Using a lower current rated device (such as the 3 A or 6 A alternatives listed) will result in thermal stress, reduced reliability, and potential component failure.

Q: What is the difference between TO-220-2 and TO-220AC package designations?

A: Both designations refer to the same physical through-hole package form factor with two leads. The package compatibility is mechanical and electrical. All listed substitute parts use the TO-220-2 package or the equivalent TO-220AC supplier designation and are physically interchangeable.

Q: Why do some substitute parts have lower reverse recovery times (trr)?

A: Reverse recovery time indicates how quickly the diode transitions from conducting to blocking state. Lower trr values (such as 18 ns for BYC8-600P,127 versus 120 ns for MSR860G) represent improved switching characteristics and reduced switching losses. This is a performance enhancement, not a compatibility issue.

Q: Are all listed substitutes RoHS3 compliant?

A: Most listed substitutes are RoHS3 compliant. LXA06T600, QH03TZ600, and LQA03TC600 are listed as RoHS Compliant (not specifically ROHS3). Verify compliance requirements for your specific application and regulatory jurisdiction before final selection.

Q: Can I use the DSEI25-06A (25 A) instead of the MSR860G (8 A)?

A: Yes. The DSEI25-06A meets all electrical requirements (600 V, ≥ 8 A) and is physically compatible. The higher current rating provides design margin and thermal headroom. However, verify that your circuit design accommodates the different forward voltage characteristics (1.31 V @ 25 A versus 1.7 V @ 8 A) and reverse leakage current (100 µA versus 10 µA).

Q: What is the significance of forward voltage (Vf) differences between substitutes?

A: Forward voltage affects power dissipation and heat generation during conduction. Lower Vf values (such as 1.3 V for STTH8L06D) result in reduced power loss and lower junction temperatures. Higher Vf values (such as 1.9 V for BYC8-600P,127) result in increased power dissipation. Select based on your thermal design requirements and power budget.

Q: Should I prioritize active status over other parameters when selecting a substitute?

A: Yes. Active product status ensures long-term supply availability, ongoing manufacturer support, and access to current production batches. The obsolete STTH806D should be avoided unless existing inventory is specifically required for legacy system maintenance.

Q: Are there any thermal considerations when substituting the MSR860G?

A: Yes. Operating temperature range and maximum junction temperature vary among substitutes. The MSR860G operates to 150°C maximum junction temperature. STTH8L06D, BYC8-600P,127, and VS-HFA08TB60-M3 support 175°C maximum junction temperature, providing additional thermal margin. Verify your application's thermal environment and heat dissipation design.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message