SR005 R0G Schottky Diode 50V 500mA Equivalent & Substitute Parts

Part Overview

The SR005 R0G is a through-hole Schottky rectifier diode rated for 50V DC reverse voltage and 500mA average rectified current in a DO-204AL (DO-41) axial package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement. The device operates across a junction temperature range of -55°C to 150°C and meets ROHS3 compliance requirements.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the SR005 R0G is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a DC reverse voltage rating of 50V or higher to ensure safe operation within the original design envelope.

Package Type: The original part uses DO-204AL (DO-41) axial through-hole packaging. Substitute parts must use identical or mechanically compatible packaging to fit existing PCB layouts without redesign.

Technology: All substitutes employ Schottky rectifier technology, maintaining the fast recovery characteristic (≤ 500ns) and low forward voltage drop inherent to this diode class.

Current Rating: The SR005 R0G is rated for 500mA average rectified current. Substitute parts with higher current ratings (1A) are acceptable as they provide additional design margin. Parts with lower current ratings are not suitable.

Forward Voltage: The maximum forward voltage of 700 mV at 500 mA establishes the conduction loss profile. Substitute parts with equal or lower forward voltage at equivalent or higher current levels maintain or improve circuit efficiency.

Reverse Leakage: The 500 µA reverse leakage current at 50V is a characteristic parameter. Substitute parts with equal or lower leakage current are acceptable.

Temperature Range: The operating junction temperature range of -55°C to 150°C must be met or exceeded by substitute parts.

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications from the same manufacturer) and Similar Parts (higher current ratings or different manufacturers with compatible electrical and mechanical characteristics).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Package	Product Status	RoHS Status
SR005 R0G	Taiwan Semiconductor Corporation	50 V	500 mA	700 mV @ 500 mA	500 µA @ 50 V	DO-204AL (DO-41)	Discontinued	ROHS3 Compliant
SR005	Taiwan Semiconductor Corporation	50 V	500 mA	700 mV @ 500 mA	500 µA @ 50 V	DO-204AL (DO-41)	Active	ROHS3 Compliant
SR005 R1G	Taiwan Semiconductor Corporation	50 V	500 mA	700 mV @ 500 mA	500 µA @ 50 V	DO-204AL (DO-41)	Active	ROHS3 Compliant
SR005HR1G	Taiwan Semiconductor Corporation	50 V	500 mA	700 mV @ 500 mA	500 µA @ 50 V	DO-204AL (DO-41)	Active	ROHS3 Compliant
DSB1A50	Microchip Technology	50 V	1 A	600 mV @ 1 A	100 µA @ 50 V	DO-204AL (DO-41)	Active	RoHS non-compliant
MBR150G	onsemi	50 V	1 A	750 mV @ 1 A	500 µA @ 50 V	DO-204AL (DO-41), Axial	Obsolete	ROHS3 Compliant
MBR150RLG	onsemi	50 V	1 A	750 mV @ 1 A	500 µA @ 50 V	DO-204AL (DO-41), Axial	Active	ROHS3 Compliant
SB150-E3/54	Vishay General Semiconductor - Diodes Division	50 V	1 A	650 mV @ 1 A	500 µA @ 50 V	DO-204AL (DO-41)	Active	ROHS3 Compliant
SB150-E3/73	Vishay General Semiconductor - Diodes Division	50 V	1 A	650 mV @ 1 A	500 µA @ 50 V	DO-204AL (DO-41)	Active	ROHS3 Compliant
SB150-T	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	500 µA @ 50 V	DO-204AL (DO-41)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacements):

The SR005, SR005 R1G, and SR005HR1G are parametric equivalents manufactured by Taiwan Semiconductor Corporation. These parts maintain identical electrical specifications to the SR005 R0G and are available in active product status. The SR005HR1G variant includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. All three equivalents are ROHS3 compliant and carry unlimited moisture sensitivity level (MSL 1).

Preferred Substitute (Higher Current Rating):

The MBR150RLG manufactured by onsemi is the recommended substitute for new designs. This part is in active product status, ROHS3 compliant, and rated for 1A average rectified current, providing 2× design margin over the original 500mA specification. The MBR150RLG maintains the 50V voltage rating, 500 µA reverse leakage, and DO-204AL (DO-41) axial package compatibility. Forward voltage is 750 mV at 1A, which is acceptable for most applications.

Alternative Substitutes (Higher Current Rating):

The SB150-E3/54 and SB150-E3/73 from Vishay General Semiconductor are active, ROHS3-compliant alternatives rated for 1A. These parts feature lower forward voltage (650 mV @ 1A) compared to the MBR150RLG, reducing conduction losses. Both maintain 50V voltage rating and DO-204AL (DO-41) package compatibility.

The SB150-T from Diodes Incorporated is an active, ROHS3-compliant 1A substitute with forward voltage of 700 mV at 1A, matching the original part's forward voltage characteristic at higher current.

Not Recommended:

The DSB1A50 from Microchip Technology is not recommended due to RoHS non-compliance status, which conflicts with ROHS3 compliance requirements of the original design.

The MBR150G from onsemi is obsolete and should not be selected for new designs despite ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I use a 1A-rated diode as a substitute for the 500mA SR005 R0G?

A: Yes. A 1A-rated diode with identical voltage rating (50V), package type (DO-204AL/DO-41), and technology (Schottky) is a valid substitute. The higher current rating provides additional design margin and does not degrade circuit performance. The diode will operate at 500mA within its rated capacity.

Q: What is the difference between SR005, SR005 R1G, and SR005HR1G?

A: All three parts are parametric equivalents with identical electrical specifications. The SR005HR1G includes AEC-Q101 automotive qualification, making it suitable for automotive applications. The SR005 and SR005 R1G are standard industrial-grade variants. Selection depends on application requirements.

Q: Are the Vishay SB150-E3/54 and SB150-E3/73 interchangeable?

A: Yes. Both parts are electrically identical with 50V rating, 1A current, and 650 mV forward voltage at 1A. The difference is in packaging designation (E3/54 and E3/73 refer to tape and reel configurations). Both use DO-204AL (DO-41) package and are suitable for identical applications.

Q: Does the forward voltage difference between substitutes affect circuit design?

A: Forward voltage differences are minor (650 mV to 750 mV at 1A) and typically do not require circuit redesign. The original SR005 R0G operates at 700 mV at 500mA. Substitutes operating at 650 mV or 700 mV at 1A will produce similar or lower conduction losses. Verify forward voltage drop in your specific application if power dissipation is critical.

Q: Why is the DSB1A50 not recommended despite being electrically compatible?

A: The DSB1A50 is RoHS non-compliant, while the original SR005 R0G is ROHS3 compliant. Using a non-compliant substitute may violate design specifications and regulatory requirements for products subject to RoHS directives.

Q: Can I substitute the SR005 R0G with a part rated for higher voltage (e.g., 100V)?

A: Yes. A Schottky diode with higher voltage rating (100V or greater) and identical or higher current rating (500mA or greater) in the same package is a valid substitute. Higher voltage rating does not degrade performance in a 50V application.

Q: What is the significance of the DO-204AL (DO-41) package designation?

A: DO-204AL and DO-41 are equivalent designations for the same axial through-hole package. All substitute parts listed use this package, ensuring mechanical and electrical compatibility with existing PCB layouts without modification.

Q: Is the reverse leakage current specification important for substitution?

A: Reverse leakage current affects circuit performance in high-impedance applications. The original SR005 R0G specifies 500 µA at 50V. Substitutes with equal or lower leakage (such as DSB1A50 at 100 µA) are acceptable. Higher leakage is not recommended for precision applications.

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