MSRD620CT Equivalent & Substitute Parts

Part Overview

The MSRD620CT is a diode array rectifier manufactured by onsemi, configured as a 1 Pair Common Cathode design with 200 V reverse voltage rating and 3 A average rectified current per diode. The device is housed in a TO-252-3 DPAK surface mount package and belongs to the SWITCHMODE™ series. The MSRD620CT is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating the same physical package footprint.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io) (per Diode)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	55	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Operating Temperature - Junction	-55 to 175	°C
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitute parts for the MSRD620CT are grouped based on strict electrical and mechanical compatibility criteria. All substitute candidates must satisfy the following requirements:

Mandatory Compatibility Criteria:

Diode Configuration: 1 Pair Common Cathode
Voltage - DC Reverse (Vr) (Max): 200 V minimum
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount

Current Rating Considerations: Substitute parts are classified into two categories based on average rectified current per diode:

Direct Equivalents (3 A rating): Parts with identical 3 A current rating provide drop-in replacement capability
Higher Current Rated Substitutes (4 A, 6 A, 8 A ratings): Parts with current ratings exceeding 3 A are electrically compatible and provide enhanced current handling capability within the same package

Technology and Performance Parameters: Substitute parts may employ different diode technologies (Standard, Avalanche, Super Barrier) and exhibit variations in forward voltage, reverse recovery time, and reverse leakage current. These variations remain within acceptable operating ranges for the application category.

Product Status and Compliance: Active product status substitutes are prioritized for new designs. RoHS3 compliance is available in multiple substitute options. Automotive-grade parts with AEC-Q101 qualification are identified where applicable.

Parameter Comparison

Parameter	MSRD620CT	MSRD620CTG	STTH802CB-TR	STTH1002CB-TR	VS-MURD620CT-M3	VS-MURD620CTTR-M3	RURD620CCS9A-F085	SBR6200CTL-13
Manufacturer	onsemi	onsemi	STMicroelectronics	STMicroelectronics	Vishay	Vishay	onsemi	Diodes Inc.
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V	200 V	200 V	200 V	200 V
Current - Average Rectified (Io) (per Diode)	3 A	3 A	4 A	8 A	6 A	6 A	6 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A	1.15 V @ 3 A	1.1 V @ 4 A	1.1 V @ 5 A	1.2 V @ 6 A	1.2 V @ 6 A	1 V @ 6 A	850 mV @ 3 A
Speed	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Standard Recovery > 500ns
Reverse Recovery Time (trr)	55 ns	55 ns	20 ns	25 ns	19 ns	19 ns	30 ns	—
Current - Reverse Leakage @ Vr	5 µA @ 200 V	5 µA @ 200 V	4 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	100 µA @ 200 V	100 µA @ 200 V
Operating Temperature - Junction	-55 to 175 °C	-55 to 175 °C	175 °C (Max)	175 °C (Max)	-65 to 175 °C	-65 to 175 °C	-65 to 175 °C	-65 to 175 °C
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalent (Identical Specifications):

MSRD620CTG is a direct equivalent to MSRD620CT, manufactured by onsemi with identical electrical specifications (200 V, 3 A, 1.15 V forward voltage, 55 ns recovery time). MSRD620CTG achieves ROHS3 compliance, addressing regulatory requirements of the original obsolete part. Both parts share the SWITCHMODE™ series designation and identical package configuration. MSRD620CTG is classified as obsolete but maintains 4254 units in stock inventory.

Active Product Substitutes with Enhanced Current Rating:

For applications requiring higher current capacity or active product status, the following parts provide electrical compatibility with increased current ratings:

VS-MURD620CT-M3 and VS-MURD620CTTR-M3 (Vishay FRED Pt® series, 6 A rating) deliver improved current handling with faster reverse recovery time (19 ns versus 55 ns). Both achieve ROHS3 compliance and maintain active product status. The primary difference is packaging: VS-MURD620CT-M3 is supplied in Tube format, while VS-MURD620CTTR-M3 is supplied in Tape & Reel format.

STTH802CB-TR (STMicroelectronics, 4 A rating) provides the closest current step-up from the original 3 A specification with active product status and ROHS3 compliance. This part exhibits superior reverse recovery time (20 ns) and lower reverse leakage current (4 µA).

STTH1002CB-TR (STMicroelectronics, 8 A rating) offers maximum current capacity within the same package with active product status, ROHS3 compliance, and AEC-Q101 automotive qualification. Reverse recovery time is 25 ns with 5 µA reverse leakage current.

RURD620CCS9A-F085 (onsemi, 6 A rating) employs Avalanche technology with active product status and AEC-Q101 automotive qualification. This part exhibits lower forward voltage (1 V @ 6 A) and faster recovery time (30 ns) compared to the original specification.

Alternative Technology Substitute:

SBR6200CTL-13 (Diodes Incorporated, 3 A rating) maintains identical current specification using Super Barrier technology. This part achieves significantly lower forward voltage (850 mV @ 3 A) with active product status and ROHS3 compliance. Recovery speed is classified as Standard (>500ns), differing from the original Fast Recovery specification.

Compliance Considerations:

All active product substitutes listed above achieve ROHS3 compliance, addressing environmental and regulatory requirements. Automotive-grade options with AEC-Q101 qualification are available in STTH1002CB-TR and RURD620CCS9A-F085 for applications requiring automotive-level reliability.

Frequently Asked Questions (FAQ)

Q: Can MSRD620CTG be used as a direct replacement for MSRD620CT?

A: Yes. MSRD620CTG is a direct equivalent with identical electrical specifications: 200 V reverse voltage, 3 A average rectified current, 1.15 V forward voltage at 3 A, 55 ns reverse recovery time, and TO-252-3 DPAK package. The primary difference is RoHS compliance status (ROHS3 versus non-compliant). Both parts are classified as obsolete.

Q: What is the difference between VS-MURD620CT-M3 and VS-MURD620CTTR-M3?

A: Both parts are electrically identical Vishay FRED Pt® series diode arrays with 200 V, 6 A specifications. The difference is packaging format: VS-MURD620CT-M3 is supplied in Tube packaging, while VS-MURD620CTTR-M3 is supplied in Tape & Reel (TR) format. Selection depends on assembly line requirements and inventory management preferences.

Q: Can I use a higher current-rated substitute like STTH1002CB-TR (8 A) in place of the 3 A MSRD620CT?

A: Yes. Higher current-rated parts are electrically compatible substitutes. The 8 A rating of STTH1002CB-TR provides enhanced current handling capability within the same 200 V voltage specification and identical TO-252-3 DPAK package. The application circuit will operate within the lower current envelope of the original design.

Q: What is the significance of reverse recovery time differences between substitute parts?

A: Reverse recovery time (trr) affects switching speed and electromagnetic interference characteristics. The original MSRD620CT specifies 55 ns recovery time. Substitute parts with faster recovery times (19–30 ns) reduce switching losses and EMI generation. Parts with slower recovery times (SBR6200CTL-13, >500ns) are suitable for lower-frequency applications where switching speed is less critical.

Q: Are there automotive-qualified substitutes available?

A: Yes. STTH1002CB-TR and RURD620CCS9A-F085 both carry AEC-Q101 automotive qualification. STTH1002CB-TR is rated for 8 A, while RURD620CCS9A-F085 is rated for 6 A. Both maintain 200 V reverse voltage specification and TO-252-3 DPAK package compatibility.

Q: What is the difference between Standard and Fast Recovery speed classifications?

A: Fast Recovery (≤500ns) diodes are optimized for high-frequency switching applications with reduced reverse recovery time. Standard Recovery (>500ns) diodes are suitable for lower-frequency rectification applications. SBR6200CTL-13 employs Standard Recovery technology, while all other substitutes listed use Fast Recovery technology.

Q: Does forward voltage variation affect circuit performance?

A: Forward voltage differences between substitute parts affect power dissipation and thermal management. SBR6200CTL-13 exhibits the lowest forward voltage (850 mV @ 3 A), reducing power loss. RURD620CCS9A-F085 shows 1 V @ 6 A, while Vishay parts specify 1.2 V @ 6 A. The original MSRD620CT specifies 1.15 V @ 3 A. Circuit design must account for these variations in thermal calculations.

Q: Can I substitute parts with different reverse leakage current specifications?

A: Yes. Reverse leakage current variations (4–100 µA @ 200 V) are acceptable for most rectification applications. Higher leakage current (100 µA in RURD620CCS9A-F085 and SBR6200CTL-13) may affect precision analog circuits or high-impedance applications. Standard applications tolerate these variations without performance degradation.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tube (VS-MURD620CT-M3), Tape & Reel (VS-MURD620CTTR-M3, STTH1002CB-TR, STTH802CB-TR, RURD620CCS9A-F085, SBR6200CTL-13), and Cut Tape & Digi-Reel (STTH1002CB-TR). All maintain identical TO-252-3 DPAK physical footprint for PCB compatibility.

Q: Which substitute offers the best overall performance for new designs?

A: STTH1002CB-TR provides optimal performance for new designs: active product status, ROHS3 compliance, AEC-Q101 automotive qualification, enhanced 8 A current rating, fast recovery time (25 ns), and lowest reverse leakage current (5 µA). Availability is 25,400 units in stock. For lower current requirements, STTH802CB-TR (4 A) offers similar advantages with 24,749 units in stock.

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