MURD620CT Equivalent & Substitute Parts

Part Overview

The MURD620CT is a general-purpose diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 200 V DC reverse voltage and 6 A average rectified current per diode. The device is housed in a TO-252-3 DPAK surface mount package with fast recovery characteristics (≤500 ns).

The MURD620CT is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades. Substitute parts maintain the same package footprint and core electrical specifications while offering improved availability and compliance status.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io) (per Diode)	6	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 6 A	—
Speed	Fast Recovery ≤500 ns, >200 mA (Io)	—
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Operating Temperature - Junction	-65 to 175	°C
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the MURD620CT is determined by the following critical parameters:

Mandatory Compatibility Parameters:

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

Performance Parameters (Allowable Variation):

Current - Average Rectified (Io): Substitute parts rated at 3 A, 4 A, or 6 A are acceptable for applications where the circuit design accommodates the specified current rating
Voltage - Forward (Vf): Variation within 0.15 V is acceptable based on application thermal and efficiency requirements
Reverse Recovery Time (trr): Variation from 20 ns to 55 ns is acceptable for standard rectification applications
Operating Temperature - Junction: Minimum -55°C is acceptable; maximum 175°C is standard

Compliance Parameters:

RoHS Status: ROHS3 Compliant substitutes are preferred for new designs
Product Status: Active status substitutes are preferred for long-term availability

Substitute parts are grouped into three categories based on current rating and performance characteristics: 3 A rated devices (MURD620CTT4G, SNRVUD620CTT4G, MSRD620CTG, MSRD620CTT4G, NRVSRD620VCTT4G) and 4 A rated devices (STTH802CB-TR).

Parameter Comparison

Parameter	MURD620CT (Main)	MURD620CTT4G	SNRVUD620CTT4G	MSRD620CTG	MSRD620CTT4G	NRVSRD620VCTT4G	STTH802CB-TR
Manufacturer	Vishay	onsemi	onsemi	onsemi	onsemi	onsemi	STMicroelectronics
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
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V	200 V	200 V	200 V
Current - Average Rectified (Io) (per Diode)	6 A	3 A	3 A	3 A	3 A	3 A	4 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 6 A	1 V @ 3 A	1 V @ 3 A	1.15 V @ 3 A	1.15 V @ 3 A	1.35 V @ 6 A	1.1 V @ 4 A
Speed	Fast Recovery ≤500 ns, >200 mA (Io)	Fast Recovery ≤500 ns, >200 mA (Io)	Fast Recovery ≤500 ns, >200 mA (Io)	Fast Recovery ≤500 ns, >200 mA (Io)	Fast Recovery ≤500 ns, >200 mA (Io)	Fast Recovery ≤500 ns, >200 mA (Io)	Fast Recovery ≤500 ns, >200 mA (Io)
Reverse Recovery Time (trr)	35 ns	35 ns	35 ns	55 ns	55 ns	55 ns	20 ns
Current - Reverse Leakage @ Vr	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	4 µA @ 200 V
Operating Temperature - Junction	-65 to 175 °C	-65 to 175 °C	-65 to 175 °C	-55 to 175 °C	-55 to 175 °C	-55 to 175 °C	Max 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
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	—	AEC-Q101	—	—	AEC-Q101	—

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

MURD620CTT4G and SNRVUD620CTT4G are direct onsemi equivalents with identical reverse recovery time (35 ns) and matching voltage ratings. Both are Active status products with ROHS3 compliance. SNRVUD620CTT4G includes AEC-Q101 automotive qualification, making it suitable for automotive applications. These parts are recommended for standard industrial applications requiring direct electrical equivalence.

Secondary Substitutes (Performance Variation Acceptable):

MSRD620CTT4G is an Active status onsemi product with ROHS3 compliance. It features a longer reverse recovery time (55 ns) compared to the main part (35 ns), which is acceptable for standard rectification applications where switching speed is not critical. This part offers the highest inventory availability (30,200 pcs).

NRVSRD620VCTT4G is an Active status onsemi product with AEC-Q101 automotive qualification and ROHS3 compliance. It features a longer reverse recovery time (55 ns) and higher forward voltage (1.35 V @ 6 A). This part is suitable for automotive applications requiring qualified components.

Alternative Substitute (Higher Current Rating):

STTH802CB-TR is an STMicroelectronics product rated for 4 A average rectified current with superior reverse recovery time (20 ns). It features ROHS3 compliance and Active product status. This part is suitable for applications where faster switching performance is beneficial, though the 4 A rating requires circuit design verification for applications originally specified at 6 A.

Obsolete Substitute (Not Recommended for New Designs):

MSRD620CTG is classified as Obsolete and should not be selected for new production designs despite ROHS3 compliance. It is listed for reference only in legacy system maintenance scenarios.

Frequently Asked Questions (FAQ)

Q: Can MURD620CTT4G directly replace MURD620CT in existing designs?

A: Yes. MURD620CTT4G maintains identical package footprint (TO-252-3 DPAK), diode configuration (1 Pair Common Cathode), voltage rating (200 V), and reverse recovery time (35 ns). The primary difference is the current rating reduction from 6 A to 3 A. Direct replacement is valid only if the circuit design operates at or below 3 A per diode. Circuit analysis is required to confirm current requirements.

Q: What is the difference between MURD620CTT4G and MSRD620CTT4G?

A: Both are onsemi 3 A rated diode arrays in TO-252-3 DPAK packages with 200 V ratings. MURD620CTT4G has a reverse recovery time of 35 ns, while MSRD620CTT4G has 55 ns. MURD620CTT4G is preferred for applications sensitive to switching speed. MSRD620CTT4G offers higher inventory availability and is suitable for standard rectification where recovery time is not performance-critical.

Q: Is SNRVUD620CTT4G suitable for automotive applications?

A: Yes. SNRVUD620CTT4G carries AEC-Q101 automotive qualification and ROHS3 compliance. It is rated for 3 A average rectified current, 200 V reverse voltage, and features 35 ns reverse recovery time. This part is suitable for automotive systems requiring qualified components.

Q: Can STTH802CB-TR replace MURD620CT?

A: STTH802CB-TR is mechanically and electrically compatible in the TO-252-3 DPAK package with identical 200 V rating. However, it is rated for 4 A average rectified current compared to the original 6 A specification. STTH802CB-TR offers superior reverse recovery time (20 ns) and ROHS3 compliance. Substitution is valid only if circuit design accommodates the 4 A current rating.

Q: Why is MURD620CT obsolete?

A: The MURD620CT is classified as obsolete by Vishay General Semiconductor. Equivalent active products from onsemi and STMicroelectronics provide improved compliance status (ROHS3), better availability, and in some cases enhanced performance characteristics. Active substitutes are recommended for all new designs and production runs.

Q: What is the significance of RoHS compliance in selecting a substitute?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. The original MURD620CT is RoHS non-compliant. All recommended substitutes are ROHS3 compliant, making them suitable for applications subject to environmental and regulatory requirements. New designs should specify ROHS3 compliant parts.

Q: Are all substitute parts available in the same packaging options?

A: Substitute parts are available in different packaging formats. MURD620CTT4G is available in Cut Tape (CT) & Digi-Reel format. SNRVUD620CTT4G, MSRD620CTT4G, NRVSRD620VCTT4G, and STTH802CB-TR are available in Tape & Reel (TR) format. Packaging selection depends on production volume and assembly requirements. Verify packaging availability with suppliers before design finalization.

Q: What is the minimum operating temperature range for substitute parts?

A: MURD620CTT4G and SNRVUD620CTT4G maintain the original -65°C minimum junction temperature. MSRD620CTT4G, NRVSRD620VCTT4G, and STTH802CB-TR have a -55°C minimum junction temperature. For applications requiring -65°C operation, MURD620CTT4G or SNRVUD620CTT4G are required. For standard industrial applications, -55°C minimum is acceptable.

Q: How does forward voltage variation affect circuit performance?

A: Forward voltage differences between parts range from 1.0 V to 1.35 V at their respective rated currents. These variations affect power dissipation and thermal performance. For applications with tight thermal budgets or high-frequency switching, forward voltage specifications should be verified against circuit simulation. MURD620CTT4G and SNRVUD620CTT4G feature the lowest forward voltage (1.0 V @ 3 A), reducing power loss compared to the original part.

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