MBR1650 Equivalent & Substitute Parts

Part Overview

The MBR1650 is a Schottky rectifier diode manufactured by onsemi, rated for 50 V DC reverse voltage and 16 A average rectified current in a through-hole TO-220-2 package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Schottky diodes in this performance class are used in power supply rectification, freewheeling applications, and high-frequency switching circuits where fast recovery and low forward voltage drop are required.

Key Parameters

Parameter	MBR1650 Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	16	A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 16 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	1	mA @ 50 V
Mounting Type	Through Hole	—
Package / Case	TO-220-2	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the MBR1650 is determined by the following critical parameters:

Voltage Rating (Vr): The MBR1650 operates at 50 V maximum reverse voltage. Substitute parts must meet or exceed this voltage specification to ensure safe operation in the original circuit.

Current Rating (Io): The 16 A average rectified current is a primary selection criterion. Substitute parts with equal or higher current ratings are acceptable; lower ratings are not suitable.

Forward Voltage Drop (Vf): The maximum forward voltage of 750 mV at 16 A establishes the conduction loss profile. Substitute parts with comparable or lower forward voltage characteristics maintain circuit efficiency.

Recovery Speed: Fast recovery characteristics (≤ 500ns) are essential for switching applications. All substitute candidates maintain this specification.

Package Compatibility: The TO-220-2 through-hole package defines the physical and thermal interface. Substitute parts must use compatible package types (TO-220-2 or TO-220AC variants).

Temperature Range: The operating junction temperature range of -65°C to 150°C establishes thermal operating limits. Substitute parts with equal or wider temperature ranges are acceptable.

Substitute parts are grouped into two categories:

Category A - Direct Voltage/Current Match (50 V, 16 A): MBR1660-E3/45 provides equivalent electrical performance with higher voltage rating (60 V) and identical current capacity.

Category B - Reduced Voltage, Equivalent or Higher Current (45 V, 10-25 A): DSA15I45PA, DSS10-0045A, DSS10-0045B, DSS16-0045B, DSS25-0045A, MBR1045, and MBR1645-BP operate at 45 V with current ratings from 10 A to 25 A. These are suitable for applications where the 50 V rating is not a hard requirement and the circuit operates below 45 V.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [mV]	Package	Temp Range [°C]	Product Status
MBR1650	onsemi	50	16	750 @ 16A	TO-220-2	-65 ~ 150	Obsolete
MBR1660-E3/45	Vishay General Semiconductor	60	16	750 @ 16A	TO-220-3	-65 ~ 150	Active
DSA15I45PA	IXYS	45	15	750 @ 15A	TO-220AC	-55 ~ 175	Active
DSS16-0045B	IXYS	45	16	480 @ 15A	TO-220AC	-55 ~ 150	Active
DSS25-0045A	IXYS	45	25	690 @ 25A	TO-220AC	-55 ~ 175	Active
DSS10-0045A	IXYS	45	10	680 @ 10A	TO-220AC	-55 ~ 175	Active
DSS10-0045B	IXYS	45	10	510 @ 10A	TO-220AC	-55 ~ 150	Active
MBR1045	Taiwan Semiconductor Corporation	45	10	700 @ 10A	TO-220AC	-55 ~ 150	Active
MBR1645-BP	Micro Commercial Co	45	16	—	TO-220AC	-55 ~ 150	Active

Engineering Selection Recommendations

Primary Substitute - MBR1660-E3/45:

The MBR1660-E3/45 manufactured by Vishay General Semiconductor is the closest functional equivalent to the MBR1650. It maintains identical current capacity (16 A) and forward voltage characteristics (750 mV @ 16 A), with a higher voltage rating (60 V vs. 50 V). The higher voltage rating provides additional design margin. This part is in active production status with RoHS3 compliance and identical temperature range (-65°C to 150°C). The TO-220-3 package is mechanically compatible with TO-220-2 applications. This part is recommended for direct replacement in new designs and ongoing production.

Secondary Substitutes - 45 V Rated Alternatives:

For applications where the circuit operates below 45 V, the following active-status parts provide suitable alternatives:

DSS16-0045B (IXYS): Matches the 16 A current rating with reduced forward voltage (480 mV @ 15 A), improving efficiency. RoHS3 compliant. Operating temperature range -55°C to 150°C.

DSA15I45PA (IXYS): Provides 15 A current capacity with 750 mV forward voltage at 15 A. Extended temperature range (-55°C to 175°C). RoHS3 compliant.

MBR1645-BP (Micro Commercial Co): Matches 16 A current rating at 45 V with 200 µA reverse leakage. Operating temperature -55°C to 150°C.

DSS25-0045A (IXYS): Offers higher current capacity (25 A) at 45 V with 690 mV forward voltage. Extended temperature range (-55°C to 175°C). RoHS3 compliant. Suitable for applications requiring additional current margin.

Lower Current Alternatives:

DSS10-0045A and DSS10-0045B (IXYS): Both rated for 10 A at 45 V. DSS10-0045B exhibits lower forward voltage (510 mV @ 10 A). These are suitable only for applications with reduced current requirements.

MBR1045 (Taiwan Semiconductor Corporation): 10 A at 45 V with 700 mV forward voltage. RoHS3 compliant. Suitable for reduced current applications.

All substitute parts listed are in active production status, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the MBR1660-E3/45 directly replace the MBR1650 in all applications?

A: The MBR1660-E3/45 is electrically compatible with the MBR1650 for applications operating at or below 50 V. The higher 60 V rating provides additional safety margin. The TO-220-3 package is mechanically compatible with TO-220-2 footprints in through-hole designs. Verify PCB layout accommodates the three-pin configuration if thermal management requirements differ.

Q: What is the difference between TO-220-2 and TO-220AC packages?

A: Both packages are through-hole mounted Schottky diodes with identical electrical performance in this product category. TO-220-2 and TO-220AC refer to the same physical form factor with two leads. Package designation variations reflect different manufacturer conventions. Mechanical compatibility is confirmed for direct substitution.

Q: Why do some substitute parts have lower voltage ratings (45 V vs. 50 V)?

A: The MBR1650 operates at 50 V maximum reverse voltage. Substitute parts rated at 45 V are suitable only for circuits where the actual reverse voltage does not exceed 45 V. If the circuit design requires 50 V or higher voltage margin, use MBR1660-E3/45 (60 V rating) or verify that the application operates safely below 45 V before selecting lower-rated alternatives.

Q: How does forward voltage affect circuit performance?

A: Forward voltage (Vf) determines conduction losses in rectification applications. Lower Vf reduces power dissipation and heat generation. For example, DSS16-0045B exhibits 480 mV @ 15 A compared to the MBR1650's 750 mV @ 16 A, resulting in lower losses. Verify that the substitute part's forward voltage is acceptable for the circuit's thermal design and efficiency requirements.

Q: Are all substitute parts RoHS compliant?

A: MBR1660-E3/45, DSA15I45PA, DSS10-0045A, DSS10-0045B, DSS16-0045B, DSS25-0045A, and MBR1045 are RoHS3 compliant. MBR1645-BP compliance status is not specified in the provided data. Verify RoHS compliance requirements for your specific application before final part selection.

Q: What is the significance of reverse leakage current?

A: Reverse leakage current (Ir) represents the small current flowing through the diode when reverse biased. Lower leakage current indicates better diode quality and reduced standby power consumption. The MBR1650 specifies 1 mA @ 50 V. Substitute parts vary from 100 µA to 10 mA depending on the specific model. For most applications, this variation is not critical; however, precision analog circuits may require lower leakage specifications.

Q: Can I use a higher current-rated diode as a substitute?

A: Yes. A diode rated for higher current (e.g., DSS25-0045A at 25 A) can replace the MBR1650 (16 A) in the same circuit. Higher current ratings provide additional design margin and do not negatively affect circuit operation. Verify that the voltage rating meets or exceeds the application requirement.

Q: What is the operating temperature range significance?

A: The MBR1650 operates from -65°C to 150°C junction temperature. Some substitute parts extend to -55°C minimum or 175°C maximum. Verify that the substitute part's temperature range encompasses the application's thermal environment. Extended temperature ranges provide additional design margin for extreme operating conditions.

Q: Are there any package considerations for PCB layout?

A: All listed substitute parts use through-hole TO-220 packages with identical lead spacing and mounting hole requirements. Direct PCB footprint compatibility is confirmed. Thermal pad or heatsink mounting interfaces are equivalent across all substitute parts listed.

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