SBL850 Equivalent & Substitute Parts

Part Overview

The SBL850 is a Schottky rectifier diode rated for 50 V DC reverse voltage and 8 A average rectified current in a Through Hole TO-220AC package. Manufactured by Diodes Incorporated, this component is classified as Obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The part maintains ROHS3 compliance and operates across a junction temperature range of -65°C to 150°C.

Substiute Parts

SBL850

Diodes IncorporatedIn Stock: 725SBL850 Datasheet

Current PartRFQ

DSS10-0045A

IXYSIn Stock: 771DSS10-0045A Datasheet

MFR RecommendedRFQ

MBR1045

Taiwan Semiconductor CorporationIn Stock: 4256MBR1045 Datasheet

MFR RecommendedRFQ

MBR1045G

onsemiIn Stock: 50266MBR1045G 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 SBL850 are qualified based on the following criteria:

Primary Substitution Parameters:

• Technology: Schottky diode
• Mounting Type: Through Hole
• Package / Case: TO-220-2 or TO-220AC
• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 50 V
• Current - Average Rectified (Io): Equal to or greater than 8 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Secondary Compatibility Parameters:

• Operating Temperature Range: Must encompass or exceed the application requirements
• RoHS Compliance: ROHS3 Compliant
• Forward Voltage Characteristics: Within acceptable operating parameters

The substitute parts listed below meet or exceed the electrical and mechanical specifications of the SBL850, ensuring functional compatibility in applications requiring 50 V / 8 A Schottky rectification.

Parameter Comparison

Engineering Selection Recommendations

DSS10-0045A (IXYS): This part is rated for 45 V / 10 A with Active product status. The reduced reverse voltage rating (45 V versus 50 V) represents a design constraint for applications requiring the full 50 V specification. Current capacity exceeds the SBL850 requirement. Forward voltage is lower at 680 mV @ 10 A. Operating temperature range extends to 175°C. ROHS3 compliance is confirmed. This substitute is suitable for applications where 45 V reverse voltage is acceptable.

MBR1045 (Taiwan Semiconductor Corporation): Rated for 45 V / 10 A with Active product status and extensive inventory availability (4214 pcs). Forward voltage matches the SBL850 at 700 mV @ 10 A. Reverse leakage is significantly lower at 100 µA @ 45 V. Operating temperature range is -55°C to 150°C. ROHS3 compliance is confirmed. This substitute is suitable for applications where 45 V reverse voltage is acceptable and lower leakage current is beneficial.

MBR1045G (onsemi): Rated for 45 V / 10 A with Active product status and highest inventory availability (50200 pcs). Part of the SWITCHMODE™ series. Forward voltage is higher at 840 mV @ 20 A. Reverse leakage is 100 µA @ 45 V. Operating temperature range extends to 175°C and matches the lower temperature limit of the SBL850 at -65°C. ROHS3 compliance is confirmed. This substitute is suitable for applications where 45 V reverse voltage is acceptable and extended temperature range is required.

VT2045BP-M3/4W (Vishay General Semiconductor - Diodes Division): Rated for 45 V / 20 A with Active product status. Part of the TMBS® series. Forward voltage is lower at 660 mV @ 20 A. Current capacity significantly exceeds the SBL850 requirement. Reverse leakage is higher at 2 mA @ 45 V. Operating temperature range extends to 200°C maximum. ROHS3 compliance is confirmed. This substitute is suitable for applications where 45 V reverse voltage is acceptable and higher current capacity is required.

All substitute parts maintain ROHS3 compliance and Through Hole TO-220-2 package compatibility with the SBL850. The primary design consideration is the reduced reverse voltage rating (45 V) across all substitutes compared to the original 50 V specification.

Frequently Asked Questions (FAQ)

Q: Can the DSS10-0045A, MBR1045, MBR1045G, or VT2045BP-M3/4W directly replace the SBL850 in all applications?

A: Direct replacement depends on the application's reverse voltage requirement. All substitute parts are rated for 45 V maximum reverse voltage, compared to the SBL850's 50 V rating. Applications operating at or below 45 V reverse voltage can use these substitutes. Applications requiring the full 50 V specification require alternative parts not listed here.

Q: What is the significance of the current rating differences between the SBL850 and substitute parts?

A: The SBL850 is rated for 8 A average rectified current. All substitute parts exceed this specification (10 A or 20 A), providing design margin. Higher current ratings do not prevent substitution; they indicate the part can handle equal or greater current loads.

Q: How do forward voltage differences affect circuit performance?

A: Forward voltage variations between parts (660 mV to 840 mV) affect power dissipation and voltage drop across the diode. The DSS10-0045A and VT2045BP-M3/4W offer lower forward voltage (680 mV and 660 mV respectively), reducing heat generation. The MBR1045G exhibits higher forward voltage at 840 mV @ 20 A. Circuit design must account for these differences in thermal and voltage drop calculations.

Q: Are all substitute parts available in the same package as the SBL850?

A: Yes. All substitute parts use the TO-220-2 package with Through Hole mounting, matching the SBL850's physical form factor. Mechanical compatibility is confirmed across all substitutes.

Q: What is the impact of reverse leakage current differences?

A: The SBL850 exhibits 500 µA reverse leakage @ 50 V. Substitute parts show lower leakage at 45 V: DSS10-0045A (300 µA), MBR1045 (100 µA), MBR1045G (100 µA), and VT2045BP-M3/4W (2 mA). Lower leakage current reduces standby power consumption and heat generation. The VT2045BP-M3/4W exhibits higher leakage, which may be significant in low-power applications.

Q: Which substitute part offers the widest operating temperature range?

A: The VT2045BP-M3/4W provides the widest operating temperature range, extending to 200°C maximum junction temperature. The MBR1045G and DSS10-0045A both extend to 175°C. The MBR1045 is limited to 150°C, matching the SBL850's upper limit.

Q: Is the reduced reverse voltage rating (45 V vs. 50 V) a critical limitation?

A: The significance depends on the application's actual operating voltage. If the circuit operates at or below 45 V reverse voltage, the reduced rating is not a limitation. If the design requires the full 50 V specification for safety margin or peak voltage transients, alternative parts with 50 V or higher ratings must be selected.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the SBL850's environmental compliance status.

Q: What is the inventory status of each substitute part?

A: DSS10-0045A: 725 pcs; MBR1045: 4214 pcs; MBR1045G: 50200 pcs; VT2045BP-M3/4W: 9158 pcs. All parts are available as New Original stock.