MBR1645/45 Equivalent & Substitute Parts

Part Overview

The MBR1645/45 is a Schottky rectifier diode rated for 45 V DC reverse voltage and 16 A average rectified current in a Through Hole TO-220-3 package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as Obsolete. Due to its obsolete status and limited availability relative to active alternatives, equivalent substitute parts are necessary for new designs and ongoing production requirements. Active equivalent and substitute parts maintain the same electrical specifications while offering improved availability and compliance status.

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
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	200	µA @ 45 V
Mounting Type	Through Hole	—
Package / Case	TO-220-3 / TO-220-2	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the MBR1645/45 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 45 V minimum
Current - Average Rectified (Io): 16 A minimum
Technology: Schottky
Mounting Type: Through Hole
Package / Case: TO-220 series (TO-220-2 or TO-220-3)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitution Categories:

Direct Equivalents maintain identical electrical ratings (45 V, 16 A) with active product status and improved compliance. These parts are pin-compatible and functionally interchangeable within the same thermal and electrical operating envelope.

Upgrade Alternatives provide equivalent or superior voltage and current ratings with enhanced temperature performance or improved availability. These parts are suitable where thermal headroom or higher current capacity is beneficial.

Current-Reduced Alternatives provide the same voltage rating with reduced current capacity (10 A to 15 A). These parts are applicable only in circuits where the actual operating current does not exceed the substitute part's rating.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Product Status	RoHS Status	Tj (Max)
MBR1645/45	Vishay	45 V	16 A	630 mV @ 16 A	TO-220-3	Obsolete	Non-compliant	150°C
MBR1645-E3/45	Vishay	45 V	16 A	630 mV @ 16 A	TO-220-2	Active	ROHS3 Compliant	150°C
STPS1545D	STMicroelectronics	45 V	15 A	840 mV @ 30 A	TO-220-2	Active	ROHS3 Compliant	175°C
DSS16-0045A	IXYS	45 V	16 A	670 mV @ 15 A	TO-220-2	Active	ROHS3 Compliant	—
DSS10-0045A	IXYS	45 V	10 A	680 mV @ 10 A	TO-220-2	Active	ROHS3 Compliant	175°C
MBR1645-BP	Micro Commercial Co	45 V	16 A	—	TO-220-2	Active	—	150°C

Engineering Selection Recommendations

For Direct Replacement (Preferred):

MBR1645-E3/45 is the primary direct equivalent. It maintains identical electrical specifications (45 V, 16 A, 630 mV forward voltage) and is manufactured by the same supplier (Vishay). This part is Active with ROHS3 compliance, addressing the obsolescence and regulatory status of the original MBR1645/45. The TO-220-2 package is mechanically compatible with TO-220-3 applications in standard through-hole mounting configurations.

For Enhanced Thermal Performance:

STPS1545D (STMicroelectronics) provides a maximum junction temperature of 175°C compared to 150°C for the original part, with ROHS3 compliance and active status. Current rating is 15 A, which is acceptable for applications operating below 16 A. This part is suitable where thermal margin is a design consideration.

For Exact Current Rating Match:

DSS16-0045A (IXYS) maintains the full 16 A current rating with 45 V voltage specification and active product status. ROHS3 compliance is confirmed. This part is applicable where the full 16 A capacity must be preserved.

For Current-Limited Applications:

DSS10-0045A (IXYS) is suitable only for circuits where operating current does not exceed 10 A. This part provides 45 V voltage rating with active status and ROHS3 compliance.

For Micro Commercial Co Supply Chain:

MBR1645-BP maintains 45 V and 16 A specifications with active status. This part is available through alternative supply channels and is suitable where supplier diversification is required.

Frequently Asked Questions (FAQ)

Q: Can MBR1645-E3/45 directly replace MBR1645/45 in existing designs?

A: Yes. MBR1645-E3/45 maintains identical electrical specifications (45 V, 16 A, 630 mV forward voltage) and is pin-compatible. The TO-220-2 package is mechanically compatible with TO-220-3 mounting in standard through-hole applications. No circuit modifications are required.

Q: What is the difference between TO-220-2 and TO-220-3 packages?

A: TO-220-3 contains three leads (two diode terminals and one case tab), while TO-220-2 contains two leads (diode terminals only). Both are through-hole mounted. In applications where the case tab is not used for thermal management, TO-220-2 parts are directly compatible.

Q: Is STPS1545D suitable as a substitute if my circuit operates at 16 A?

A: STPS1545D is rated for 15 A average rectified current. It is suitable only if the actual operating current in your circuit does not exceed 15 A. If sustained operation at 16 A is required, use DSS16-0045A or MBR1645-E3/45.

Q: Why is MBR1645/45 listed as Obsolete?

A: The MBR1645/45 is no longer in active production by Vishay. Active equivalent parts with improved compliance status and availability are available as direct replacements.

Q: Are all substitute parts ROHS3 compliant?

A: MBR1645-E3/45, STPS1545D, DSS16-0045A, and DSS10-0045A are all ROHS3 compliant. MBR1645-BP RoHS status is not specified in available documentation. Verify compliance requirements for your application before selection.

Q: What is the maximum junction temperature difference between substitute parts?

A: MBR1645/45 and MBR1645-E3/45 are rated to 150°C maximum junction temperature. STPS1545D and DSS10-0045A are rated to 175°C. This 25°C difference provides additional thermal margin in high-temperature applications.

Q: Can I use DSS10-0045A in a 16 A circuit?

A: No. DSS10-0045A is rated for 10 A maximum average rectified current. Using this part in a 16 A circuit exceeds its electrical rating and will result in component failure or reduced reliability. Use only in circuits where operating current does not exceed 10 A.

Q: What is the forward voltage difference between substitute parts?

A: Forward voltage varies by part and measurement conditions. MBR1645-E3/45 specifies 630 mV @ 16 A. DSS16-0045A specifies 670 mV @ 15 A. STPS1545D specifies 840 mV @ 30 A. These differences affect power dissipation and thermal performance. Select based on your circuit's current operating point.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts are available in Tube or Bulk packaging. MBR1645-E3/45 is supplied in Tube. DSS16-0045A is supplied in Tube. STPS1545D is supplied in Tube. MBR1645-BP is supplied in Bulk. Verify packaging availability with your supplier for production requirements.

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