DSTF4045C Equivalent & Substitute Parts Reference

Part Overview

The DSTF4045C is a Schottky diode array manufactured by Littelfuse Inc., configured as a 1 Pair Common Cathode rectifier with a maximum reverse voltage rating of 45 V and average rectified current of 20 A per diode. The component is packaged in a TO-220-3 Full Pack with isolated tab configuration for through-hole mounting applications. This part is currently in active product status with 1010 units in stock.

Equivalent and substitute parts are identified when design requirements permit operation within specified electrical and mechanical parameter ranges, or when original part availability is limited. Substitution eligibility is determined by matching critical parameters including reverse voltage rating, current capacity, diode configuration, package type, and thermal operating range.

Substiute Parts

DSTF4045C

Littelfuse Inc.In Stock: 1054DSTF4045C Datasheet

Current PartRFQ

DSTF4045C

Littelfuse Inc.In Stock: 1054DSTF4045C Datasheet

Parametric EquivalentRFQ

MBRF2545CT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1531MBRF2545CT-E3/45 Datasheet

MFR RecommendedRFQ

SB3045LFCT_T0_00001

Panjit International Inc.In Stock: 3091SB3045LFCT_T0_00001 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DSTF4045C are identified based on the following critical parameters that determine functional compatibility:

Mandatory Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 45 V
• Mounting Type: Through Hole
• Package / Case: TO-220-3 Full Pack, Isolated Tab
• Supplier Device Package: ITO-220AB

Allowable Parameter Variation:

• Current - Average Rectified (Io) (per Diode): Substitute parts may operate at reduced current ratings provided the application does not exceed the substitute part's specified maximum current
• Voltage - Forward (Vf) (Max): Variation permitted within the electrical design margins of the application
• Current - Reverse Leakage @ Vr: Variation permitted within application leakage specifications
• Operating Temperature - Junction: Substitute parts must support the application's required temperature range

The following parts meet these substitution criteria and are listed as manufacturer-recommended equivalents.

Parameter Comparison

Engineering Selection Recommendations

DSTF4045C (Littelfuse Inc.) - Primary Part

The DSTF4045C remains the primary specification when application requirements demand the full 20 A average rectified current per diode. This part is active in production status with 1010 units in current inventory. The component carries ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications.

SB3045LFCT_T0_00001 (Panjit International Inc.) - Substitute Option

The SB3045LFCT_T0_00001 is suitable for applications where the required average rectified current does not exceed 15 A per diode. This part offers superior forward voltage characteristics (530 mV @ 15 A versus 580 mV @ 20 A on the primary part) and lower reverse leakage current (400 µA @ 45 V). The part is active in production with 3018 units in inventory. Operating temperature range is -55 to 125 °C, which covers standard industrial applications but does not extend to the upper 150 °C limit of the primary part. ROHS3 compliance is confirmed.

MBRF2545CT-E3/45 (Vishay General Semiconductor - Diodes Division) - Substitute Option

The MBRF2545CT-E3/45 is suitable for applications where the required average rectified current does not exceed 12.5 A per diode. This part provides the widest operating temperature range (-65 to 150 °C) and lowest reverse leakage current (200 µA @ 45 V). Forward voltage is specified at 820 mV @ 30 A. The part is active in production with 1427 units in inventory. ROHS3 compliance is confirmed.

All three parts maintain identical reverse voltage rating (45 V), diode configuration (1 Pair Common Cathode), technology (Schottky), and package type (TO-220-3 Full Pack, Isolated Tab). Selection between substitute parts is determined by application current requirements and operating temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can the SB3045LFCT_T0_00001 be used in place of the DSTF4045C in all applications?

A: The SB3045LFCT_T0_00001 is suitable only for applications where the required average rectified current per diode does not exceed 15 A. If the application circuit requires the full 20 A capability of the DSTF4045C, this substitute is not appropriate. Additionally, the maximum operating junction temperature of the SB3045LFCT_T0_00001 is 125 °C, compared to 150 °C for the DSTF4045C. Verify that the application's thermal environment does not require operation above 125 °C.

Q: What is the difference between the MBRF2545CT-E3/45 and the DSTF4045C?

A: The MBRF2545CT-E3/45 differs in three key parameters: (1) average rectified current is rated at 12.5 A per diode versus 20 A for the DSTF4045C, (2) forward voltage is 820 mV @ 30 A versus 580 mV @ 20 A, and (3) reverse leakage current is 200 µA @ 45 V versus 3 mA @ 45 V. The MBRF2545CT-E3/45 offers a wider operating temperature range (-65 to 150 °C). Use this part only when application current requirements do not exceed 12.5 A per diode.

Q: Are all three parts pin-compatible?

A: All three parts use the TO-220-3 Full Pack package with isolated tab configuration and are through-hole mounted. Pin compatibility is confirmed for direct board-level substitution. However, verify that the specific PCB footprint and thermal management design accommodate the substitute part's electrical characteristics, particularly forward voltage and reverse leakage specifications.

Q: What is the significance of the "isolated tab" specification?

A: The isolated tab configuration means the tab is electrically isolated from the diode array internal connections. This allows the tab to be mounted directly to a heat sink without requiring electrical isolation hardware. All three parts in this comparison include isolated tab configuration, confirming compatibility in thermal management designs.

Q: Can I use the MBRF2545CT-E3/45 in a high-temperature application requiring 150 °C operation?

A: Yes. The MBRF2545CT-E3/45 supports operating junction temperatures up to 150 °C, matching the upper temperature limit of the DSTF4045C. However, the current rating of the MBRF2545CT-E3/45 is limited to 12.5 A per diode. Verify that the application's current requirements do not exceed this limit.

Q: What does "1 Pair Common Cathode" configuration mean?

A: This configuration contains two diodes within a single package, with their cathodes connected together internally. The common cathode connection is brought out as a single pin. This configuration is used in bridge rectifier and dual-diode applications where two diodes share a common return path.

Q: Are all parts ROHS3 compliant?

A: Yes. The DSTF4045C, SB3045LFCT_T0_00001, and MBRF2545CT-E3/45 are all ROHS3 compliant and REACH unaffected, meeting regulatory requirements for use in industrial, commercial, and consumer applications in regulated markets.