MURA205T3 Equivalent & Substitute Parts

Part Overview

The MURA205T3 is a general-purpose rectifier diode manufactured by onsemi, rated for 50 V DC reverse voltage and 2 A average rectified current in a surface mount SMA package (DO-214AC). This part is classified as obsolete, indicating it has reached end-of-life status and is no longer recommended for new designs. Finding equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for existing applications.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	940 mV @ 2 A
Reverse Recovery Time (trr)	30 ns
Current - Reverse Leakage @ Vr	2 µA @ 50 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-65°C ~ 175°C

Substitute Part Grouping Explanation

Substitute parts for the MURA205T3 are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Identical Electrical Specifications): Parts that match all critical electrical parameters including 50 V reverse voltage rating, 2 A average rectified current, 940 mV forward voltage drop at 2 A, 30 ns reverse recovery time, and 2 µA reverse leakage current at 50 V. These parts maintain the same fast recovery speed classification and operate across the same temperature range (-65°C to 175°C). All direct equivalents use the DO-214AC (SMA) surface mount package.

Parametric Equivalents (Matching Core Electrical Ratings): Parts that maintain the same 50 V reverse voltage and 2 A current ratings with minor variations in secondary parameters such as forward voltage drop, reverse recovery time, or reverse leakage current. These parts are functionally compatible for applications where the primary electrical specifications are the controlling factors.

Similar Parts (Different Voltage or Current Ratings): Parts that share the same package and mounting technology but differ in voltage or current ratings. These are listed for reference in applications where design flexibility exists or where derating is acceptable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Ir @ Vr	Product Status	RoHS Status
MURA205T3	onsemi	50 V	2 A	940 mV @ 2 A	30 ns	2 µA @ 50 V	Obsolete	Non-compliant
MURA205T3G	onsemi	50 V	2 A	940 mV @ 2 A	30 ns	2 µA @ 50 V	Active	ROHS3 Compliant
SURA8205T3G	onsemi	50 V	2 A	940 mV @ 2 A	30 ns	2 µA @ 50 V	Obsolete	ROHS3 Compliant
SURA8205T3G-GA01	onsemi	50 V	2 A	940 mV @ 2 A	30 ns	2 µA @ 50 V	Active	Not specified
SURA8205T3G-VF01	onsemi	50 V	2 A	940 mV @ 2 A	30 ns	2 µA @ 50 V	Not For New Designs	ROHS3 Compliant
ES2A-LTP	Micro Commercial Co	50 V	2 A	950 mV @ 2 A	35 ns	5 µA @ 50 V	Not For New Designs	ROHS3 Compliant
ES2AA-13-F	Diodes Incorporated	50 V	2 A	920 mV @ 2 A	25 ns	5 µA @ 50 V	Active	ROHS3 Compliant
US2AA-TP	Micro Commercial Co	50 V	2 A	1 V @ 2 A	50 ns	5 µA @ 50 V	Active	Not specified

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: MURA205T3G is the direct successor to MURA205T3. This part maintains identical electrical specifications (50 V, 2 A, 940 mV forward voltage, 30 ns recovery time) while offering active product status and ROHS3 compliance. The part is available in Tape & Reel packaging and represents the preferred path for design updates and new production runs.

Alternative - Automotive Grade: SURA8205T3G-GA01 provides identical electrical performance with automotive-grade qualification (AEC-Q101) and active product status. This part is suitable for applications requiring automotive-level reliability and traceability. Selection of this part should be based on application requirements for automotive qualification.

Secondary Alternatives - Active Status: ES2AA-13-F (Diodes Incorporated) and US2AA-TP (Micro Commercial Co) are active products with 50 V / 2 A ratings. ES2AA-13-F offers superior reverse recovery time (25 ns versus 30 ns) and lower forward voltage (920 mV versus 940 mV), resulting in reduced power dissipation. US2AA-TP provides fast recovery characteristics but with slightly higher forward voltage (1 V) and longer recovery time (50 ns). Both parts are ROHS3 compliant and suitable for new designs.

Obsolete Alternatives - Not Recommended for New Designs: SURA8205T3G and ES2A-LTP are classified as obsolete or not for new designs. These parts should be used only for sustaining production of existing designs where supply chain continuity is the primary concern.

Not Recommended - Different Electrical Ratings: US1B-13-F and US1J-13-F differ significantly in voltage rating (100 V and 600 V respectively) and current rating (1 A). These parts are listed in the substitute cross-reference but are not suitable replacements for 50 V / 2 A applications without circuit redesign and thermal re-analysis.

Frequently Asked Questions (FAQ)

Q: Can MURA205T3G be used as a direct replacement for MURA205T3?

A: Yes. MURA205T3G is the direct equivalent with identical electrical specifications: 50 V reverse voltage, 2 A average rectified current, 940 mV forward voltage at 2 A, and 30 ns reverse recovery time. The primary differences are product status (active versus obsolete) and RoHS compliance (ROHS3 compliant). MURA205T3G is the recommended replacement for new designs and ongoing production.

Q: What is the difference between MURA205T3G and SURA8205T3G-GA01?

A: Both parts have identical electrical specifications. SURA8205T3G-GA01 is qualified to AEC-Q101 automotive standards and carries active product status. MURA205T3G is the standard industrial-grade equivalent. Selection between these parts depends on whether automotive qualification is required for the application.

Q: Can ES2AA-13-F replace MURA205T3 in all applications?

A: ES2AA-13-F maintains the same 50 V / 2 A ratings and is ROHS3 compliant with active product status. However, it differs in secondary parameters: forward voltage is 920 mV (versus 940 mV), reverse recovery time is 25 ns (versus 30 ns), and reverse leakage is 5 µA (versus 2 µA). These differences result in lower power dissipation but higher reverse leakage. Compatibility depends on circuit design margins and application requirements.

Q: Why are US1B-13-F and US1J-13-F listed as substitutes if they have different ratings?

A: US1B-13-F (100 V / 1 A) and US1J-13-F (600 V / 1 A) are listed in the cross-reference data but are not functional equivalents. These parts share the same DO-214AC (SMA) package and surface mount technology. They are included for reference only in applications where design flexibility allows for different voltage or current ratings, or where derating is acceptable.

Q: What is the significance of the packaging designation (Tape & Reel versus Bulk)?

A: Packaging designation indicates the form in which the part is supplied. Tape & Reel (TR) packaging is standard for automated assembly and high-volume production. Bulk packaging is used for lower-volume applications or manual assembly. The electrical specifications and performance are identical regardless of packaging format. Selection should be based on manufacturing process requirements and volume.

Q: Is SURA8205T3G-VF01 suitable for new designs?

A: No. SURA8205T3G-VF01 is classified as "Not For New Designs" despite having identical electrical specifications to MURA205T3. This designation indicates the part is in a transition phase and should not be selected for new product development. MURA205T3G or SURA8205T3G-GA01 are the recommended alternatives for new designs.

Q: What does RoHS compliance mean for component selection?

A: RoHS (Restriction of Hazardous Substances) compliance indicates the part meets regulatory requirements for hazardous substance restrictions. ROHS3 compliant parts meet current EU and similar international regulations. MURA205T3 is RoHS non-compliant, while MURA205T3G and most alternatives are ROHS3 compliant. For applications subject to RoHS regulations, ROHS3 compliant parts must be selected.

Q: Can I use a higher voltage-rated diode (such as US1B-13-F at 100 V) in place of MURA205T3 (50 V)?

A: Higher voltage-rated diodes can be used in circuits designed for lower voltages, but this represents derating and is not a direct substitution. US1B-13-F has different electrical characteristics including higher forward voltage (1 V versus 940 mV) and longer reverse recovery time (50 ns versus 30 ns), resulting in increased power dissipation and different circuit behavior. Such substitution requires circuit analysis and thermal re-evaluation.

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