MURA240T3 Equivalent & Substitute Parts

Part Overview

The MURA240T3 is a general-purpose rectifier diode manufactured by onsemi, rated for 400 V DC reverse voltage and 2 A average rectified current in a surface mount SMA package. This component is classified as obsolete, indicating it has been discontinued and is no longer recommended for new designs. Finding equivalent and substitute parts is necessary to support existing applications, facilitate design transitions, and ensure continued component availability for production and maintenance activities.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	65 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-65°C ~ 175°C

Substitute Part Grouping Explanation

Substitution of the MURA240T3 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 400 V
Current - Average Rectified (Io): Must equal or exceed 2 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed 1.3 V @ 2 A
Speed: Must support Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr): Must not exceed 65 ns
Current - Reverse Leakage @ Vr: Must not exceed 5 µA @ 400 V

Mechanical Compatibility Requirements:

Package / Case: Must be DO-214AC, SMA
Mounting Type: Must be Surface Mount
Operating Temperature - Junction: Must support -65°C ~ 175°C range

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalent: Parts from the same manufacturer (onsemi) with identical electrical and mechanical specifications but different product status or packaging configuration.

Parametric Equivalent: Parts meeting all electrical and mechanical requirements with additional qualifications such as automotive-grade certification (AEC-Q101).

Similar Parts: Parts from alternative manufacturers meeting the core electrical requirements (400 V, 2 A capability) and mechanical compatibility, though some may have minor variations in secondary parameters such as reverse recovery time or forward voltage.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Speed	Package	Product Status	RoHS Status
MURA240T3	onsemi	400 V	2 A	1.3 V @ 2 A	65 ns	Fast Recovery ≤ 500ns	DO-214AC, SMA	Obsolete	RoHS Non-Compliant
MURA240T3G	onsemi	400 V	2 A	1.3 V @ 2 A	65 ns	Fast Recovery ≤ 500ns	DO-214AC, SMA	Active	ROHS3 Compliant
SURA8240T3G-GA01	onsemi	400 V	2 A	1.3 V @ 2 A	65 ns	Fast Recovery ≤ 500ns	DO-214AC, SMA	Active	ROHS3 Compliant
ES2G-LTP	Micro Commercial Co	400 V	2 A	1.25 V @ 2 A	35 ns	Fast Recovery ≤ 500ns	DO-214AC, SMA	Active	ROHS3 Compliant
US2GA-TP	Micro Commercial Co	400 V	2 A	1.4 V @ 2 A	50 ns	Fast Recovery ≤ 500ns	DO-214AC, SMA	Active	ROHS3 Compliant
RR2L4SDDTE25	Rohm Semiconductor	400 V	2 A	1.1 V @ 2 A	Not Specified	Standard Recovery >500ns	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant
STTH1R04A	STMicroelectronics	400 V	1 A	1.5 V @ 1 A	30 ns	Fast Recovery ≤ 500ns	DO-214AC, SMA	Active	ROHS3 Compliant
STTH1R04AY	STMicroelectronics	400 V	1 A	1.6 V @ 1 A	30 ns	Fast Recovery ≤ 500ns	DO-214AC, SMA	Active	ROHS3 Compliant
US1G-E3/61T	Vishay General Semiconductor	400 V	1 A	1 V @ 1 A	50 ns	Fast Recovery ≤ 500ns	DO-214AC, SMA	Active	ROHS3 Compliant
ES2G	YAGEO	Not Specified	Not Specified	1.3 V	Not Specified	Not Specified	DO-214AA	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: MURA240T3G

The MURA240T3G is the direct equivalent of the obsolete MURA240T3. It is manufactured by onsemi and provides identical electrical and mechanical specifications. The primary distinction is product status: MURA240T3G is active and ROHS3 compliant, whereas the original MURA240T3 is obsolete and RoHS non-compliant. This part is suitable for direct replacement in existing designs and is recommended for new applications requiring 400 V, 2 A rectification capability.

Secondary Recommendation: SURA8240T3G-GA01

The SURA8240T3G-GA01 is a parametric equivalent manufactured by onsemi with identical electrical specifications to the MURA240T3. This part carries automotive-grade qualification (AEC-Q101) and ROHS3 compliance. Selection of this part is appropriate for applications requiring automotive-grade reliability and qualification documentation.

Alternative Recommendation: ES2G-LTP

The ES2G-LTP, manufactured by Micro Commercial Co, meets all electrical and mechanical requirements for 400 V, 2 A operation. This part exhibits superior performance characteristics including lower forward voltage (1.25 V @ 2 A) and faster reverse recovery time (35 ns compared to 65 ns). The ES2G-LTP is active and ROHS3 compliant. This part is suitable for applications where improved switching performance is beneficial.

Alternative Recommendation: US2GA-TP

The US2GA-TP, manufactured by Micro Commercial Co, meets all electrical and mechanical requirements for 400 V, 2 A operation. This part provides fast recovery characteristics (50 ns) and is active with ROHS3 compliance. The US2GA-TP is suitable for applications requiring high-volume availability and alternative sourcing.

Not Recommended for New Designs:

The RR2L4SDDTE25 (Rohm Semiconductor) is classified as "Not For New Designs" and exhibits standard recovery characteristics (>500ns) rather than fast recovery. While it meets voltage and current requirements, its recovery speed does not align with the fast recovery specification of the original part.

Current-Limited Alternatives:

The STTH1R04A, STTH1R04AY, and US1G-E3/61T are rated for 1 A average rectified current, which is below the 2 A requirement of the MURA240T3. These parts are not suitable as direct replacements for applications requiring 2 A operation.

Frequently Asked Questions (FAQ)

Q: Can the MURA240T3G be used as a direct replacement for the MURA240T3?

A: Yes. The MURA240T3G provides identical electrical and mechanical specifications. The primary difference is that MURA240T3G is active and ROHS3 compliant, whereas MURA240T3 is obsolete and RoHS non-compliant. Direct substitution is supported without circuit modification.

Q: What is the difference between MURA240T3G and SURA8240T3G-GA01?

A: Both parts are manufactured by onsemi and provide identical electrical specifications (400 V, 2 A, 1.3 V forward voltage, 65 ns recovery time). The SURA8240T3G-GA01 carries automotive-grade qualification (AEC-Q101), making it suitable for applications requiring automotive reliability standards. Selection depends on application requirements for automotive qualification.

Q: Why are STTH1R04A and STTH1R04AY listed as similar parts if they are rated for only 1 A?

A: These parts are listed as similar because they share the same 400 V voltage rating, fast recovery characteristics, and DO-214AC SMA package. However, their 1 A current rating is insufficient for applications requiring 2 A operation. These parts are not suitable as direct replacements for the MURA240T3 in 2 A applications.

Q: Can ES2G-LTP be used in place of MURA240T3?

A: Yes, with consideration of performance differences. The ES2G-LTP meets all electrical requirements (400 V, 2 A) and mechanical compatibility (DO-214AC SMA package). The ES2G-LTP exhibits improved performance with lower forward voltage (1.25 V vs. 1.3 V) and faster recovery time (35 ns vs. 65 ns). These characteristics make it suitable for direct substitution, with the benefit of enhanced switching performance.

Q: What does "Fast Recovery ≤ 500ns, > 200mA (Io)" mean?

A: This specification indicates that the diode exhibits fast recovery characteristics with a reverse recovery time not exceeding 500 nanoseconds when the reverse current exceeds 200 milliamps. This parameter is critical for switching applications where rapid diode turn-off is required to minimize switching losses and electromagnetic interference.

Q: Is RoHS compliance important for selecting a substitute part?

A: RoHS compliance is a regulatory requirement in many markets. The original MURA240T3 is RoHS non-compliant. All recommended substitute parts (MURA240T3G, SURA8240T3G-GA01, ES2G-LTP, US2GA-TP) are ROHS3 compliant, ensuring compliance with current environmental regulations and facilitating market access.

Q: What is the significance of the DO-214AC SMA package specification?

A: The DO-214AC SMA package is a surface mount package with standardized dimensions and pin configuration. All recommended substitute parts use this identical package, ensuring mechanical and electrical compatibility with existing printed circuit board layouts. No PCB redesign is required when substituting parts within this package family.

Q: Can I use US1G-E3/61T as a substitute if my application only requires 1 A?

A: Yes, if your application operates at 1 A or below. The US1G-E3/61T meets the 400 V voltage requirement and provides fast recovery characteristics. However, if your application requires 2 A operation, this part is not suitable due to its 1 A current rating limitation.

Q: What does "Moisture Sensitivity Level (MSL): 1 (Unlimited)" mean?

A: MSL 1 indicates the lowest moisture sensitivity classification. This means the component can be stored indefinitely without special moisture control measures, simplifying inventory management and reducing handling requirements compared to higher MSL ratings.

Q: Why is RR2L4SDDTE25 not recommended for new designs?

A: The RR2L4SDDTE25 is classified as "Not For New Designs" by the manufacturer, indicating it has been superseded by newer alternatives. Additionally, this part exhibits standard recovery characteristics (>500ns) rather than fast recovery (≤500ns), making it less suitable for applications requiring fast switching performance. For new designs, active parts such as MURA240T3G or ES2G-LTP are preferred.

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