MBR1645HC0G Equivalent & Substitute Parts

Part Overview

The MBR1645HC0G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 45 V DC reverse voltage and 16 A average rectified current in a TO-220AC through-hole package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part carries automotive-grade qualification (AEC-Q101) and is ROHS3 compliant, making it suitable for demanding applications requiring high reliability standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io)	16	A
Voltage - Forward (Vf) (Max) @ If	630 mV @ 16 A	mV
Current - Reverse Leakage @ Vr	500	µA @ 45 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Operating Temperature - Junction	-55 to 150	°C
Package / Case	TO-220-2	—
Mounting Type	Through Hole	—
Technology	Schottky	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the MBR1645HC0G is determined by strict equivalence across the following critical parameters: voltage rating (45 V DC reverse), current rating (16 A average rectified), forward voltage characteristics (630 mV @ 16 A), reverse leakage current (500 µA @ 45 V), recovery speed (fast recovery ≤ 500ns), package type (TO-220-2), and mounting configuration (through-hole). Parts are grouped into two categories:

Direct Equivalent: Parts maintaining identical electrical specifications and automotive qualification status, differing only in product status or packaging designation.

Parametric Equivalent: Parts meeting all core electrical parameters and package requirements, with active product status and full compliance certifications.

Similar Substitute: Parts with matching voltage and package specifications but reduced current rating (10 A versus 16 A), suitable only where application current requirements do not exceed the substitute's rating.

Parameter Comparison

Parameter	MBR1645HC0G	MBR1645H	MBR1645	VT1045BP-M3/4W
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V
Current - Average Rectified (Io)	16 A	16 A	16 A	10 A
Voltage - Forward (Vf) (Max) @ If	630 mV @ 16 A	630 mV @ 16 A	630 mV @ 16 A	680 mV @ 10 A
Current - Reverse Leakage @ Vr	500 µA @ 45 V	500 µA @ 45 V	500 µA @ 45 V	500 µA @ 45 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	Max 200°C
Package / Case	TO-220-2	TO-220-2	TO-220-2	TO-220-2
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Technology	Schottky	Schottky	Schottky	Schottky
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
Grade	Automotive	Automotive	Automotive	—
Qualification	AEC-Q101	AEC-Q101	AEC-Q101	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

MBR1645H and MBR1645 are direct parametric equivalents to the MBR1645HC0G, maintaining identical electrical specifications, automotive-grade qualification, and AEC-Q101 certification. Both parts are manufactured by Taiwan Semiconductor Corporation and are currently in active product status with confirmed inventory availability. These parts are suitable for direct replacement in all applications where the MBR1645HC0G was originally specified.

Secondary Substitute (Current-Limited Application):

VT1045BP-M3/4W is a Vishay General Semiconductor Schottky diode suitable only for applications where the average rectified current requirement does not exceed 10 A. This part maintains the 45 V voltage rating, TO-220-2 package configuration, and fast recovery speed characteristics. The VT1045BP-M3/4W does not carry automotive-grade qualification or AEC-Q101 certification; therefore, it is restricted to non-automotive applications or applications where automotive qualification is not mandated. The forward voltage at rated current (680 mV @ 10 A) is marginally higher than the primary equivalents.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part. Automotive applications requiring AEC-Q101 qualification must utilize MBR1645H or MBR1645 exclusively.

Frequently Asked Questions (FAQ)

Q: Can MBR1645H be used as a direct replacement for MBR1645HC0G?

A: Yes. MBR1645H is a direct equivalent with identical electrical specifications, voltage rating (45 V), current rating (16 A), forward voltage (630 mV @ 16 A), and automotive-grade AEC-Q101 qualification. The primary difference is product status; MBR1645H is active while MBR1645HC0G is discontinued.

Q: What is the difference between MBR1645H and MBR1645?

A: Both parts are parametric equivalents with identical electrical characteristics and specifications. The designation difference reflects packaging or supplier device package variations. Both are active products suitable for direct substitution.

Q: Is VT1045BP-M3/4W suitable for all applications using MBR1645HC0G?

A: No. VT1045BP-M3/4W has a reduced average rectified current rating of 10 A compared to the 16 A rating of MBR1645HC0G. This part is suitable only for applications where the average rectified current does not exceed 10 A. Additionally, VT1045BP-M3/4W does not carry automotive-grade qualification or AEC-Q101 certification.

Q: Are all substitute parts available in the same package?

A: Yes. All recommended substitutes utilize the TO-220-2 package with through-hole mounting configuration, ensuring mechanical and thermal compatibility with the original MBR1645HC0G design.

Q: Do the substitute parts meet automotive qualification requirements?

A: MBR1645H and MBR1645 both carry automotive-grade classification and AEC-Q101 qualification, meeting automotive requirements. VT1045BP-M3/4W does not carry automotive qualification and is restricted to non-automotive applications.

Q: What is the operating temperature range for each substitute?

A: MBR1645H and MBR1645 operate across -55°C to 150°C junction temperature. VT1045BP-M3/4W has a maximum junction temperature of 200°C, providing extended high-temperature capability but without automotive qualification.

Q: Are there any compliance or regulatory differences between the substitutes?

A: All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. Automotive-grade and AEC-Q101 certifications are present only in MBR1645H and MBR1645.

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