MBRF3045CT Equivalent & Substitute Parts

Part Overview

The MBRF3045CT is a Schottky diode array in a 1 Pair Common Cathode configuration rated for 45 V DC reverse voltage and 30 A average rectified current per diode. Manufactured by Taiwan Semiconductor Corporation, this component features fast recovery characteristics (≤500 ns) and is housed in a TO-220-3 Full Pack with isolated tab package. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs.

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)	30	A
Voltage - Forward (Vf) (Max) @ If	820 mV @ 30 A	—
Speed	Fast Recovery ≤500 ns, >200 mA (Io)	—
Current - Reverse Leakage @ Vr	200	µA @ 45 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3 Full Pack, Isolated Tab	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MBRF3045CT is determined by the following critical parameters:

Primary Substitution Criteria:

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

Secondary Substitution Criteria:

Current - Average Rectified (Io) (per Diode): Equal to or greater than 30 A
Voltage - Forward (Vf) (Max) @ If: Electrical compatibility at rated current
Speed: Fast Recovery ≤500 ns, >200 mA (Io)
Operating Temperature - Junction: Minimum -55°C to maximum 150°C

Substitute parts are categorized as follows:

Parametric Equivalent: MBRF3045CTH matches all electrical and mechanical parameters of the main part with identical ratings and performance characteristics. This part is active and available.

Direct Manufacturer Alternatives: MBRF3045CTP (SMC Diode Solutions) provides functional equivalence in the same package with 45 V rating, though current rating is not specified and forward voltage differs at lower test current.

Similar Current Rating Parts: MBRF30H45CT-E3/45 (15 A) and MBRF2545CT-E3/45 (12.5 A) provide lower current ratings but maintain 45 V reverse voltage and identical package configuration. These are suitable for applications requiring reduced current capacity.

Lower Current Rating Parts: MBRF2045CT-E3/45 (10 A) and MBRF1545CT-E3/45 (7.5 A) represent further current reductions while maintaining voltage and package specifications.

Parameter Comparison

Part Number	Manufacturer	Io (A)	Vr (V)	Vf (mV) @ If	Ir (µA) @ Vr	Tj (°C)	Package	Status	RoHS
MBRF3045CT	Taiwan Semiconductor	30	45	820 @ 30 A	200 @ 45 V	-55 to 150	TO-220-3 ITO	Discontinued	ROHS3
MBRF3045CTH	Taiwan Semiconductor	30	45	820 @ 30 A	200 @ 45 V	-55 to 150	TO-220-3 ITO	Active	ROHS3
MBRF3045CTP	SMC Diode Solutions	—	45	700 @ 15 A	1000 @ 45 V	-55 to 150	TO-220-3 ITO	Active	ROHS3
MBRF30H45CT-E3/45	Vishay	15	45	620 @ 15 A	80 @ 45 V	-65 to 175	TO-220-3 ITO	Active	ROHS3
MBRF2545CT-E3/45	Vishay	12.5	45	820 @ 30 A	200 @ 45 V	-65 to 150	TO-220-3 ITO	Active	ROHS3
MBRF2545CT/45	Vishay	12.5	45	—	200 @ 45 V	-65 to 150	TO-220-3 ITO	Active	Non-compliant
MBRF2045CT-E3/45	Vishay	10	45	650 @ 10 A	100 @ 45 V	-65 to 150	TO-220-3 ITO	Active	ROHS3
MBRF1545CT-E3/45	Vishay	7.5	45	570 @ 7.5 A	100 @ 45 V	-65 to 150	TO-220-3 ITO	Active	ROHS3

Engineering Selection Recommendations

Primary Selection: MBRF3045CTH

The MBRF3045CTH is the recommended direct replacement for the discontinued MBRF3045CT. This part is manufactured by Taiwan Semiconductor Corporation and provides identical electrical specifications, mechanical configuration, and performance characteristics. The MBRF3045CTH is currently active in production and maintains ROHS3 compliance. Automotive-grade qualification (AEC-Q101) is available for this part number, providing additional assurance for demanding applications.

Alternative Selection: MBRF3045CTP

The MBRF3045CTP, manufactured by SMC Diode Solutions, provides functional equivalence in the same TO-220-3 package with 45 V reverse voltage rating. This part is active and available. However, the forward voltage specification differs (700 mV @ 15 A versus 820 mV @ 30 A), and reverse leakage current is higher (1 mA @ 45 V versus 200 µA @ 45 V). This part is suitable for applications where the specified electrical differences are acceptable.

Reduced Current Alternatives

For applications requiring lower current capacity, the following parts maintain 45 V reverse voltage and TO-220-3 package compatibility:

MBRF30H45CT-E3/45 (15 A): Provides extended operating temperature range (-65°C to 175°C) and lower reverse leakage current (80 µA @ 45 V).
MBRF2545CT-E3/45 (12.5 A): Maintains identical forward voltage specification (820 mV @ 30 A) and reverse leakage (200 µA @ 45 V).
MBRF2045CT-E3/45 (10 A): Offers improved forward voltage performance (650 mV @ 10 A).
MBRF1545CT-E3/45 (7.5 A): Provides lowest forward voltage (570 mV @ 7.5 A) among alternatives.

All reduced-current alternatives are ROHS3 compliant and active in production.

Compliance Considerations

All recommended substitutes maintain ROHS3 compliance except MBRF2545CT/45, which is RoHS non-compliant. Selection should account for end-product regulatory requirements. Automotive-grade variants with AEC-Q101 qualification are available for MBRF3045CTH and MBRF1545CTHE3/45, MBRF2045CTHE3/45 for applications requiring automotive-level reliability.

Frequently Asked Questions (FAQ)

Q: Can MBRF3045CTH be used as a direct replacement for MBRF3045CT?

A: Yes. MBRF3045CTH is a parametric equivalent with identical electrical specifications (30 A, 45 V, 820 mV forward voltage @ 30 A), identical package configuration (TO-220-3 Full Pack, Isolated Tab), and identical performance characteristics. The primary difference is product status: MBRF3045CTH is active while MBRF3045CT is discontinued.

Q: What is the difference between MBRF3045CT and MBRF3045CTP?

A: Both parts are rated for 45 V reverse voltage in TO-220-3 packages. MBRF3045CT (Taiwan Semiconductor) specifies 30 A current rating with 820 mV forward voltage @ 30 A and 200 µA reverse leakage @ 45 V. MBRF3045CTP (SMC Diode Solutions) does not specify current rating but shows 700 mV forward voltage @ 15 A and 1 mA reverse leakage @ 45 V. MBRF3045CTP is suitable for applications where these electrical differences are acceptable.

Q: Can lower current-rated parts substitute for the MBRF3045CT?

A: Lower current-rated parts (MBRF30H45CT-E3/45 at 15 A, MBRF2545CT-E3/45 at 12.5 A, MBRF2045CT-E3/45 at 10 A, MBRF1545CT-E3/45 at 7.5 A) maintain 45 V reverse voltage and TO-220-3 package compatibility. These parts are suitable only for applications where the circuit current requirement does not exceed the part's rated current. Exceeding rated current will result in component failure.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitutes are ROHS3 compliant except MBRF2545CT/45, which is RoHS non-compliant. Verify compliance requirements for your end application before selection.

Q: What is the difference between automotive-grade and standard versions?

A: Automotive-grade versions (identified by AEC-Q101 qualification) undergo additional testing and screening to meet automotive reliability standards. MBRF3045CTH, MBRF1545CTHE3/45, and MBRF2045CTHE3/45 are available in automotive-grade variants. Standard versions are suitable for general industrial applications.

Q: Can I use MBRF3045CTP if MBRF3045CTH is unavailable?

A: MBRF3045CTP provides functional equivalence in the same package with 45 V rating. However, electrical characteristics differ: forward voltage is lower (700 mV @ 15 A) and reverse leakage is higher (1 mA @ 45 V). Circuit performance may differ. Verify that these electrical differences are acceptable for your specific application before substitution.

Q: What is the operating temperature range difference between parts?

A: MBRF3045CT and MBRF3045CTH specify -55°C to 150°C. Vishay parts (MBRF30H45CT-E3/45, MBRF2545CT-E3/45, MBRF2045CT-E3/45, MBRF1545CT-E3/45) specify -65°C to 150°C, providing lower minimum temperature operation. MBRF30H45CT-E3/45 extends to 175°C maximum, providing higher temperature capability.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts use TO-220-3 Full Pack with Isolated Tab package configuration. Packaging options (Tube, Tray, or unspecified) vary by manufacturer and part number. Verify packaging availability with your supplier for production requirements.

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