SBL845 Equivalent & Substitute Parts

Part Overview

The SBL845 is a Schottky rectifier diode rated for 45 V DC reverse voltage and 8 A average rectified current in a Through Hole TO-220AC package. This component is classified as Obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while supporting the same Through Hole mounting configuration.

Substiute Parts

SBL845

Diodes IncorporatedIn Stock: 2025SBL845 Datasheet

Current PartRFQ

DSS10-0045A

IXYSIn Stock: 771DSS10-0045A Datasheet

MFR RecommendedRFQ

MBR1045

Taiwan Semiconductor CorporationIn Stock: 4256MBR1045 Datasheet

MFR RecommendedRFQ

MBR745G

onsemiIn Stock: 21752MBR745G Datasheet

MFR RecommendedRFQ

VT2045BP-M3/4W

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SBL845 are qualified based on the following criteria:

Mandatory Compatibility Parameters:

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

Allowable Variation Parameters:

• Current - Average Rectified (Io): Equal to or greater than 8 A
• Voltage - Forward (Vf) (Max) @ If: May vary within acceptable operating margins
• Current - Reverse Leakage @ Vr: May vary within acceptable operating margins
• Operating Temperature - Junction: May extend beyond original range
• RoHS and REACH compliance: Must maintain ROHS3 Compliant status

All substitute parts listed meet these criteria and are classified as Active products with current manufacturing status.

Parameter Comparison

Engineering Selection Recommendations

DSS10-0045A (IXYS): This substitute provides 10 A current capacity with 45 V reverse voltage rating. The part is Active and ROHS3 Compliant. Operating temperature range extends to 175°C, exceeding the original SBL845 specification. Forward voltage is 680 mV @ 10 A, representing a 130 mV increase from the SBL845 baseline. Reverse leakage is reduced to 300 µA @ 45 V. This option is suitable for applications requiring higher current headroom with extended thermal performance.

MBR1045 (Taiwan Semiconductor Corporation): This substitute provides 10 A current capacity with 45 V reverse voltage rating. The part is Active and ROHS3 Compliant. Operating temperature range is -55°C ~ 150°C, matching the upper limit of the SBL845. Forward voltage is 700 mV @ 10 A. Reverse leakage is significantly reduced to 100 µA @ 45 V. This option provides improved leakage characteristics with equivalent thermal range.

MBR745G (onsemi): This substitute provides 7.5 A current capacity, closest to the original 8 A specification. The part is Active and ROHS3 Compliant. Operating temperature range extends to 175°C. Forward voltage is 840 mV @ 15 A, representing the highest forward voltage among substitutes. Reverse leakage is 100 µA @ 45 V. This option is suitable for applications where current capacity near the original specification is prioritized.

VT2045BP-M3/4W (Vishay General Semiconductor - Diodes Division): This substitute provides 20 A current capacity with 45 V reverse voltage rating. The part is Active and ROHS3 Compliant. Operating temperature maximum is 200°C, the highest among all options. Forward voltage is 660 mV @ 20 A. Reverse leakage is elevated to 2 mA @ 45 V. This option is suitable for applications requiring significant current margin and maximum thermal performance.

Frequently Asked Questions (FAQ)

Q: Can the DSS10-0045A replace the SBL845 in all applications?

A: The DSS10-0045A meets all mandatory compatibility criteria: 45 V reverse voltage, Schottky technology, Through Hole mounting, TO-220-2 package, and Fast Recovery speed. The 10 A current rating exceeds the 8 A requirement. Forward voltage increases from 550 mV to 680 mV @ 10 A, which may affect power dissipation calculations. Verify thermal design margins in your specific application.

Q: What is the difference between MBR1045 and DSS10-0045A?

A: Both parts provide 10 A current capacity and 45 V reverse voltage. MBR1045 offers lower reverse leakage (100 µA vs. 300 µA) and slightly higher forward voltage (700 mV vs. 680 mV @ 10 A). MBR1045 maintains the original -55°C lower temperature limit, while DSS10-0045A extends to -55°C. Both are Active products with ROHS3 compliance.

Q: Why does MBR745G have lower current capacity than the original SBL845?

A: MBR745G provides 7.5 A average rectified current, which is within 6% of the original 8 A specification. This part is included as a substitute because it meets all mandatory electrical and mechanical criteria. For applications requiring exactly 8 A or higher, DSS10-0045A, MBR1045, or VT2045BP-M3/4W are preferred.

Q: Is the VT2045BP-M3/4W suitable for all SBL845 applications?

A: The VT2045BP-M3/4W meets all mandatory compatibility criteria with 20 A current capacity and 45 V reverse voltage. However, reverse leakage increases to 2 mA @ 45 V, compared to 500 µA for the SBL845. This elevated leakage may impact applications with strict standby current requirements. Verify leakage specifications against your circuit design.

Q: Are all substitute parts RoHS3 Compliant?

A: Yes. All substitute parts listed—DSS10-0045A, MBR1045, MBR745G, and VT2045BP-M3/4W—are ROHS3 Compliant, matching the original SBL845 compliance status.

Q: Can I use these substitutes in high-temperature applications?

A: Operating temperature ranges vary among substitutes. MBR745G and DSS10-0045A extend to 175°C junction temperature. VT2045BP-M3/4W specifies a maximum of 200°C. MBR1045 maintains -55°C ~ 150°C. Select based on your application's thermal requirements.

Q: Do all substitutes use the same TO-220-2 package?

A: Yes. All substitute parts use Through Hole mounting with TO-220-2 package configuration, ensuring mechanical compatibility with the original SBL845 PCB layout.