SR005 R1G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SR005 R1G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 500 mA average rectified current in a DO-204AL (DO-41) through-hole axial package. This component is classified as Active product status and is ROHS3 compliant.

Substitute parts become necessary when the primary part experiences extended lead times, inventory constraints, or when design requirements permit higher current ratings. The substitute diodes listed maintain electrical compatibility through matching reverse voltage ratings, fast recovery characteristics, and thermal operating ranges while offering equal or superior current handling capabilities.

Key Parameters

Parameter	SR005 R1G
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	500 mA
Voltage - Forward (Vf) (Max) @ If	700 mV @ 500 mA
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 50 V
Capacitance @ Vr, F	80 pF @ 4V, 1MHz
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Schottky
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SR005 R1G is determined by the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 50 V
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 500 µA @ 50 V
Package / Case: DO-204AL, DO-41, Axial
Mounting Type: Through Hole
Operating Temperature Range: Compatible with -55°C ~ 150°C minimum

Allowable Parameter Variations:

Current - Average Rectified (Io): Equal or greater than 500 mA
Voltage - Forward (Vf) (Max) @ If: Equal or lower than 700 mV at rated current
Operating Temperature - Junction: Extended range acceptable (lower minimum or higher maximum)

All substitute parts listed maintain the 50 V reverse voltage specification and fast recovery Schottky technology. Substitute parts offer 1 A current rating, which exceeds the 500 mA requirement of the primary part, providing design margin for higher-load applications while maintaining backward compatibility.

Parameter Comparison

Parameter	SR005 R1G	MBR150RLG	MBR150G	SB150-E3/54	SB150-E3/73
Manufacturer	Taiwan Semiconductor Corporation	onsemi	onsemi	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	500 mA	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 500 mA	750 mV @ 1 A	750 mV @ 1 A	650 mV @ 1 A	650 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 50 V	500 µA @ 50 V	500 µA @ 50 V	500 µA @ 50 V	500 µA @ 50 V
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Technology	Schottky	Schottky	Schottky	Schottky	Schottky
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Obsolete	Active	Active

Engineering Selection Recommendations

Primary Recommendation: MBR150RLG

The MBR150RLG manufactured by onsemi is the preferred substitute for the SR005 R1G. This part maintains Active product status, ensuring long-term availability and supply chain stability. The MBR150RLG is supplied in Cut Tape (CT) packaging and provides 1 A current rating with identical 50 V reverse voltage specification. Operating temperature range extends to -65°C, providing enhanced thermal margin. ROHS3 compliance and REACH unaffected status match the primary part requirements.

Secondary Recommendation: SB150-E3/54 or SB150-E3/73

Both Vishay General Semiconductor SB150 variants (SB150-E3/54 and SB150-E3/73) are Active products with superior forward voltage characteristics (650 mV @ 1 A versus 700 mV @ 500 mA on the primary part). These parts offer the highest inventory availability (27,918 and 4,200 units respectively) and maintain all electrical and compliance requirements. The SB150-E3/54 is supplied in DO-204AL (DO-41) package configuration, while SB150-E3/73 is also available in DO-204AL (DO-41) format. Both support extended operating temperature range to -65°C.

Not Recommended: MBR150G

The MBR150G is classified as Obsolete product status, indicating discontinued manufacturing and potential future supply constraints. While electrically compatible, this part should not be selected for new designs or long-term production applications.

Frequently Asked Questions (FAQ)

Q: Can the SR005 R1G be directly replaced with MBR150RLG in existing circuit designs?

A: Yes. The MBR150RLG maintains identical 50 V reverse voltage rating, fast recovery Schottky technology, and DO-204AL (DO-41) through-hole axial package configuration. The 1 A current rating exceeds the 500 mA requirement, providing design margin. Forward voltage at 1 A (750 mV) is compatible with circuits designed for the SR005 R1G (700 mV @ 500 mA).

Q: What is the difference between SB150-E3/54 and SB150-E3/73?

A: Both parts are electrically identical Vishay SB150 Schottky diodes with 50 V, 1 A ratings and 650 mV forward voltage. The designation suffix indicates different packaging tape configurations (54 and 73 refer to tape reel specifications). Selection between these variants depends on procurement and assembly equipment compatibility. Both are Active products with equivalent availability and performance.

Q: Why do substitute parts have higher current ratings (1 A) than the primary part (500 mA)?

A: Higher current ratings indicate superior thermal and electrical design margins. A 1 A rated diode operating at 500 mA experiences lower junction temperature and stress than a 500 mA rated device at full load. This provides reliability benefits and design flexibility for future circuit modifications without component replacement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (MBR150RLG, MBR150G, SB150-E3/54, SB150-E3/73) are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the SR005 R1G.

Q: What is the operating temperature difference between SR005 R1G and substitute parts?

A: The SR005 R1G operates from -55°C to 150°C junction temperature. All substitute parts extend the minimum operating temperature to -65°C, providing 10°C additional margin at low-temperature extremes. Maximum operating temperature remains 150°C across all parts.

Q: Can MBR150G be used despite its Obsolete status?

A: MBR150G is electrically compatible but classified as Obsolete. For new designs, production applications, or long-term deployments, Active products (MBR150RLG, SB150-E3/54, SB150-E3/73) are preferred to ensure sustained supply chain availability and manufacturing support.

Q: How does forward voltage affect circuit performance?

A: Forward voltage determines voltage drop across the diode during conduction. The SR005 R1G specifies 700 mV @ 500 mA. Substitute parts specify 650-750 mV @ 1 A. At 500 mA operation, substitute parts typically exhibit lower forward voltage due to improved semiconductor design. This reduces power dissipation and heat generation in the diode, benefiting overall circuit efficiency.

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