MBRF30L45CTG Equivalent & Substitute Parts

Part Overview

The MBRF30L45CTG is a Schottky diode array manufactured by onsemi, configured as 1 pair common cathode with a maximum reverse voltage of 45 V and average rectified current of 15 A per diode. The component is housed in a TO-220-3 Full Pack through-hole package and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts are necessary for ongoing design support, production continuity, and system maintenance applications.

Key Parameters

Parameter	Value
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	500 mV @ 15 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	650 µA @ 45 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-220-3 Full Pack
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MBRF30L45CTG 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
Current - Average Rectified (Io) (per Diode): 15 A minimum
Mounting Type: Through Hole
Package / Case: TO-220-3 Full Pack or compatible variant

Secondary Compatibility Factors:

Forward voltage (Vf) characteristics within acceptable operating range
Reverse leakage current specifications
Operating temperature range
RoHS3 compliance

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (Full Parameter Match): Parts that meet or exceed all primary substitution criteria with identical or superior electrical performance characteristics.

Category B - Functional Alternatives (Reduced Current Rating): Parts that maintain voltage and configuration specifications but operate at reduced current ratings, suitable for applications with lower current demands.

Parameter Comparison

Parameter	MBRF30L45CTG	FYPF1545DNTU	MBRF30H45CT-E3/45	RB205T-40	STPS2045CFP
Manufacturer	onsemi	onsemi	Vishay General Semiconductor - Diodes Division	Rohm Semiconductor	STMicroelectronics
Product Status	Obsolete	Obsolete	Active	Active	Active
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	40 V	45 V
Current - Average Rectified (Io) (per Diode)	15 A	15 A	15 A	7.5 A	10 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 15 A	700 mV @ 15 A	620 mV @ 15 A	550 mV @ 7.5 A	570 mV @ 10 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	650 µA @ 45 V	1 mA @ 45 V	80 µA @ 45 V	300 µA @ 40 V	100 µA @ 45 V
Operating Temperature - Junction	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 175°C	150°C (Max)	175°C (Max)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3 Full Pack	TO-220-3 Full Pack	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack	TO-220-3 Full Pack
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MBRF30H45CT-E3/45 (Vishay General Semiconductor - Diodes Division)

This part is the primary recommended substitute. It maintains identical voltage and current specifications (45 V, 15 A) with superior reverse leakage characteristics (80 µA @ 45 V versus 650 µA @ 45 V). The component is in active production status, ensuring long-term availability. The isolated tab variant (ITO-220AB package) provides enhanced thermal isolation for improved heat dissipation. Operating temperature range extends to 175°C, exceeding the original specification. Full ROHS3 compliance and REACH unaffected status are maintained.

FYPF1545DNTU (onsemi)

This part provides identical electrical specifications (45 V, 15 A) and maintains onsemi manufacturer continuity. However, forward voltage is elevated at 700 mV @ 15 A compared to 500 mV @ 15 A for the original part, and reverse leakage is higher at 1 mA @ 45 V. Product status is obsolete. This part is suitable only when forward voltage elevation and increased leakage are acceptable within system design margins.

STPS2045CFP (STMicroelectronics)

This part operates at reduced current rating (10 A versus 15 A) but maintains 45 V reverse voltage specification. Forward voltage is 570 mV @ 10 A. The component is in active production with extended operating temperature range to 175°C. This part is suitable for applications where current demand does not exceed 10 A per diode.

RB205T-40 (Rohm Semiconductor)

This part operates at reduced voltage (40 V versus 45 V) and reduced current (7.5 A versus 15 A) specifications. It is suitable only for applications with lower voltage and current requirements. Product status is active with extended temperature capability.

Frequently Asked Questions (FAQ)

Q: Can MBRF30H45CT-E3/45 be used as a direct replacement for MBRF30L45CTG?

A: Yes. MBRF30H45CT-E3/45 meets all primary substitution criteria with identical voltage (45 V) and current (15 A) ratings. The isolated tab variant provides improved thermal performance. The part is in active production status, ensuring supply continuity.

Q: What is the difference between TO-220-3 Full Pack and ITO-220AB packaging?

A: Both are through-hole TO-220-3 configurations. The ITO-220AB variant features an isolated tab, which electrically isolates the mounting tab from the diode cathode, reducing thermal coupling to the substrate and improving heat dissipation characteristics.

Q: Can STPS2045CFP be used in applications requiring 15 A per diode?

A: No. STPS2045CFP is rated for 10 A per diode maximum. Using this part in 15 A applications exceeds its current specification and will result in component failure or degraded performance.

Q: Is RB205T-40 suitable for 45 V applications?

A: No. RB205T-40 is rated for 40 V maximum reverse voltage. Using this part in 45 V applications exceeds its voltage specification and will result in component failure.

Q: What is the significance of reverse leakage current differences between substitute parts?

A: Reverse leakage current affects power dissipation and circuit performance at high temperatures. MBRF30H45CT-E3/45 exhibits the lowest reverse leakage (80 µA @ 45 V), resulting in lower standby power consumption. FYPF1545DNTU exhibits higher leakage (1 mA @ 45 V), which may impact efficiency in low-power applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original MBRF30L45CTG specification.

Q: What is the impact of forward voltage differences on circuit design?

A: Forward voltage affects voltage drop across the diode during conduction. MBRF30L45CTG specifies 500 mV @ 15 A. MBRF30H45CT-E3/45 specifies 620 mV @ 15 A, representing a 120 mV increase. Circuit designs must accommodate this voltage drop variation through appropriate margin analysis.

Q: Can FYPF1545DNTU be used despite its obsolete status?

A: FYPF1545DNTU is currently in stock (8000 Pcs), but its obsolete status indicates no future production. Use of this part is limited to applications where existing inventory is available and long-term supply is not required.

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