SBL545 Equivalent & Substitute Parts

Part Overview

The SBL545 is a Schottky rectifier diode rated for 45 V DC reverse voltage and 5 A average rectified current in a through-hole TO-220AC package. Manufactured by Diodes Incorporated, this component is classified as obsolete product status. Due to its obsolete classification, equivalent and substitute parts with active product status are necessary for new designs and ongoing production requirements. Substitute options are available with matching or enhanced electrical specifications and active manufacturer support.

Substiute Parts

SBL545

Diodes IncorporatedIn Stock: 1156SBL545 Datasheet

Current PartRFQ

DSS10-0045A

IXYSIn Stock: 771DSS10-0045A Datasheet

MFR RecommendedRFQ

MBR1045

Taiwan Semiconductor CorporationIn Stock: 4256MBR1045 Datasheet

MFR RecommendedRFQ

MBR545-BP

Micro Commercial CoIn Stock: 1019MBR545-BP Datasheet

MFR RecommendedRFQ

MBR545F-BP

Micro Commercial CoIn Stock: 832MBR545F-BP Datasheet

MFR RecommendedRFQ

VT2045BP-M3/4W

Vishay General Semiconductor - Diodes DivisionIn Stock: 9182VT2045BP-M3/4W Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SBL545 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 45 V
• Mounting Type: Through Hole
• Package / Case: TO-220-2 or TO-220-2 Isolated Tab
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Parameter Variations:

• Current - Average Rectified (Io): Equal to or greater than 5 A
• Voltage - Forward (Vf) (Max) @ If: Equal to or less than the specified value at equivalent current
• Current - Reverse Leakage @ Vr: Equal to or less than specified value
• Operating Temperature - Junction: Equal to or greater than the specified range

Substitute parts are grouped into two categories: direct equivalents (5 A rated current) and higher-capacity alternatives (10 A and 20 A rated current). All substitute parts maintain the 45 V reverse voltage rating and TO-220AC package configuration required for mechanical and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (5 A Rated Current):

MBR545F-BP and MBR545-BP are direct current-rated equivalents to the SBL545. Both parts are manufactured by Micro Commercial Co with active product status. MBR545F-BP features an isolated tab package (ITO-220AC) and matches the SBL545 forward voltage specification of 550 mV @ 5 A. MBR545-BP uses a standard TO-220-2 package with 600 mV forward voltage @ 5 A. Both parts are REACH Unaffected, providing regulatory advantage over the original SBL545 which is REACH Affected.

Higher-Capacity Alternatives (10 A Rated Current):

DSS10-0045A (IXYS) and MBR1045 (Taiwan Semiconductor Corporation) provide 10 A current capacity while maintaining 45 V reverse voltage rating. These parts are suitable for applications requiring increased current headroom. DSS10-0045A offers extended operating temperature range to 175°C and lower reverse leakage (300 µA @ 45 V). MBR1045 provides the lowest reverse leakage specification (100 µA @ 45 V) among 10 A alternatives. Both parts carry active product status and REACH Unaffected compliance.

Higher-Capacity Alternative (20 A Rated Current):

VT2045BP-M3/4W (Vishay General Semiconductor) provides 20 A current capacity with 45 V reverse voltage rating. This part is suitable for applications requiring significant current margin. Operating temperature maximum of 200°C exceeds other alternatives. VT2045BP-M3/4W carries active product status, ROHS3 compliance, and REACH Unaffected status.

All substitute parts maintain fast recovery speed specification (≤ 500ns, > 200mA) and through-hole mounting configuration required for direct board-level compatibility.

Frequently Asked Questions (FAQ)

Q: Can MBR545F-BP replace SBL545 in existing designs?

A: MBR545F-BP is a direct current-rated equivalent with matching 45 V reverse voltage and 5 A current specifications. The isolated tab package (ITO-220AC) differs from the standard TO-220-2 package of the SBL545. Isolated tab packages provide electrical isolation between the tab and the die, which may be required or beneficial depending on circuit design. Mechanical mounting compatibility must be verified for the specific PCB layout.

Q: What is the difference between MBR545-BP and MBR545F-BP?

A: Both parts are 5 A, 45 V Schottky diodes from Micro Commercial Co. MBR545-BP uses a standard TO-220-2 package with 600 mV forward voltage @ 5 A. MBR545F-BP uses an isolated tab TO-220-2 package with 550 mV forward voltage @ 5 A, matching the SBL545 forward voltage specification. Package selection depends on circuit isolation requirements and PCB design constraints.

Q: Can 10 A or 20 A rated parts substitute for the 5 A SBL545?

A: DSS10-0045A, MBR1045, and VT2045BP-M3/4W are electrically compatible substitutes with higher current ratings. These parts maintain the 45 V reverse voltage and fast recovery speed specifications. Higher current ratings provide design margin and do not degrade performance in 5 A applications. All parts use TO-220AC package configuration compatible with SBL545 mounting. Selection depends on thermal management requirements and circuit design constraints.

Q: What is the significance of REACH Unaffected status?

A: REACH Unaffected status indicates the part does not contain substances of very high concern (SVHC) listed under the REACH regulation. The original SBL545 is REACH Affected, indicating potential regulatory compliance considerations. All substitute parts listed are REACH Unaffected, providing regulatory advantage for new designs and production.

Q: Are all substitute parts RoHS3 compliant?

A: DSS10-0045A, MBR1045, and VT2045BP-M3/4W are explicitly specified as ROHS3 Compliant. MBR545F-BP and MBR545-BP do not have RoHS status specified in available documentation. For applications requiring RoHS3 compliance certification, DSS10-0045A, MBR1045, or VT2045BP-M3/4W are recommended.

Q: What is the operating temperature range consideration for substitution?

A: The SBL545 operates from -65°C to 150°C. MBR545-BP has a reduced upper temperature limit of 125°C. DSS10-0045A extends to 175°C, and VT2045BP-M3/4W reaches 200°C maximum. For applications operating near the upper temperature limit of the SBL545, DSS10-0045A or VT2045BP-M3/4W provide extended thermal margin.

Q: How does reverse leakage current affect substitution?

A: The SBL545 specifies 500 µA reverse leakage @ 45 V. MBR545-BP and MBR1045 provide lower leakage (100 µA @ 45 V), reducing power dissipation in reverse bias conditions. DSS10-0045A specifies 300 µA, and VT2045BP-M3/4W specifies 2 mA. Lower reverse leakage is beneficial for low-power applications and does not prevent substitution in applications designed for the SBL545 specification.

Q: What packaging considerations apply to through-hole TO-220AC diodes?

A: All substitute parts use through-hole TO-220AC or ITO-220AC (isolated tab) packages, maintaining mechanical compatibility with SBL545 PCB layouts. Standard TO-220-2 packages (MBR545-BP, DSS10-0045A, MBR1045, VT2045BP-M3/4W) mount identically to the SBL545. The isolated tab variant (MBR545F-BP) requires verification of PCB pad design to ensure proper electrical isolation if required by circuit design.