DSTF3045C Equivalent & Substitute Parts

Part Overview

The DSTF3045C is a Schottky diode array manufactured by Littelfuse Inc., configured as a 1 Pair Common Cathode rectifier with 45V reverse voltage rating and 15A average rectified current per diode. The device is packaged in TO-220-3 Full Pack with isolated tab for through-hole mounting applications. This part is Active status and ROHS3 compliant. Substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining electrical and mechanical compatibility within specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io) per Diode	15	A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 15 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	2	mA @ 45 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3 Full Pack, Isolated Tab	—
Supplier Device Package	ITO-220AB	—
RoHS Status	ROHS3 Compliant	—
MSL	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the DSTF3045C are grouped based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

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

Parametric Equivalents maintain all critical parameters and electrical specifications identical to the main part:

DSTF3045C (Littelfuse Inc.)
VFT3045C-M3/4W (Vishay General Semiconductor - Diodes Division)
VFT3045CBP-M3/4W (Vishay General Semiconductor - Diodes Division)

Manufacturer Recommended Substitute (MBRF2545CT-E3/45) shares the same package, configuration, and voltage rating but operates at reduced current capacity (12.5A versus 15A) and exhibits different forward voltage and leakage characteristics. This part is suitable only where current requirements do not exceed 12.5A per diode.

Parameter Comparison

Parameter	DSTF3045C (Littelfuse)	VFT3045C-M3/4W (Vishay)	VFT3045CBP-M3/4W (Vishay)	MBRF2545CT-E3/45 (Vishay)
Manufacturer	Littelfuse Inc.	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V
Current - Average Rectified (Io) per Diode	15 A	15 A	15 A	12.5 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 15 A	570 mV @ 15 A	570 mV @ 15 A	820 mV @ 30 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	2 mA @ 45 V	2 mA @ 45 V	2 mA @ 45 V	200 µA @ 45 V
Operating Temperature - Junction	-55 to 150 °C	-40 to 150 °C	Max 200 °C	-65 to 150 °C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack, Isolated Tab
Supplier Device Package	ITO-220AB	ITO-220AB	ITO-220AB	ITO-220AB
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active
Series	—	TMBS®	TMBS®	—

Engineering Selection Recommendations

Direct Parametric Equivalents (Full Compatibility):

VFT3045C-M3/4W and VFT3045CBP-M3/4W are direct parametric equivalents to DSTF3045C. Both parts maintain identical electrical specifications including 45V reverse voltage, 15A average rectified current, 570mV forward voltage at 15A, and 2mA reverse leakage at 45V. Both are ROHS3 compliant, MSL 1, and packaged in TO-220-3 Full Pack with isolated tab. VFT3045C-M3/4W operates across -40 to 150°C junction temperature range, while VFT3045CBP-M3/4W specifies maximum junction temperature of 200°C. Both are part of Vishay's TMBS® series. Selection between these equivalents depends on application temperature requirements and inventory availability.

Manufacturer Recommended Substitute (Reduced Current Rating):

MBRF2545CT-E3/45 is designated as manufacturer recommended but operates at 12.5A average rectified current per diode, compared to 15A for the main part. This part exhibits higher forward voltage (820mV @ 30A) and significantly higher reverse leakage (200µA @ 45V versus 2mA @ 45V). MBRF2545CT-E3/45 is suitable only for applications where maximum current requirement does not exceed 12.5A per diode and where the increased leakage current is acceptable. Operating temperature range extends to -65°C minimum.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical package configuration (TO-220-3 Full Pack, Isolated Tab, ITO-220AB).

Frequently Asked Questions (FAQ)

Q: Can VFT3045C-M3/4W be used as a direct replacement for DSTF3045C?

A: Yes. VFT3045C-M3/4W is a parametric equivalent with identical electrical specifications: 45V reverse voltage, 15A average rectified current per diode, 570mV forward voltage at 15A, and 2mA reverse leakage at 45V. Both use TO-220-3 Full Pack with isolated tab packaging. The primary difference is operating temperature range: VFT3045C-M3/4W operates -40 to 150°C versus DSTF3045C at -55 to 150°C. Selection depends on minimum temperature requirements of the application.

Q: What is the difference between VFT3045C-M3/4W and VFT3045CBP-M3/4W?

A: Both parts are parametric equivalents with identical electrical specifications and packaging. The primary difference is maximum junction temperature specification: VFT3045C-M3/4W specifies -40 to 150°C, while VFT3045CBP-M3/4W specifies maximum junction temperature of 200°C. VFT3045CBP-M3/4W is suitable for applications requiring higher temperature operation or margin.

Q: Can MBRF2545CT-E3/45 replace DSTF3045C in all applications?

A: No. MBRF2545CT-E3/45 is not a full equivalent. It operates at 12.5A average rectified current per diode, compared to 15A for DSTF3045C. Additionally, forward voltage is higher (820mV @ 30A) and reverse leakage is significantly higher (200µA @ 45V versus 2mA @ 45V). MBRF2545CT-E3/45 is suitable only where application current requirements do not exceed 12.5A per diode and where increased leakage current is acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. DSTF3045C, VFT3045C-M3/4W, VFT3045CBP-M3/4W, and MBRF2545CT-E3/45 are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What is the package configuration for all listed parts?

A: All parts use identical packaging: TO-220-3 Full Pack with isolated tab, supplier device package ITO-220AB. All are through-hole mounted components with the same mechanical footprint and thermal characteristics.

Q: How do I select between the Vishay TMBS® equivalents?

A: Both VFT3045C-M3/4W and VFT3045CBP-M3/4W are TMBS® series parts with identical electrical performance. Selection is based on: (1) minimum operating temperature requirement (VFT3045C-M3/4W minimum -40°C, VFT3045CBP-M3/4W no minimum specified), and (2) inventory availability. For applications requiring operation below -40°C, neither Vishay TMBS® part is suitable; use DSTF3045C or MBRF2545CT-E3/45 (which operates to -65°C).

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Diode Configuration (1 Pair Common Cathode), (2) Technology (Schottky), (3) Voltage - DC Reverse (45V), (4) Package / Case (TO-220-3 Full Pack, Isolated Tab), (5) Supplier Device Package (ITO-220AB), and (6) Mounting Type (Through Hole). Current rating, forward voltage, and reverse leakage are secondary parameters that may vary in reduced-rating substitutes.

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