MBR2045CTF-E1 Equivalent & Substitute Parts

Part Overview

The MBR2045CTF-E1 is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with a maximum reverse voltage of 45 V and average rectified current of 10 A per diode. The device is packaged in TO-220-3 Full Pack through-hole format and operates across a junction temperature range of -65°C to 150°C.

This part is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode array configuration.

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)	10	A
Voltage - Forward (Vf) (Max) @ If	650 mV @ 10 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	100	µA @ 45 V
Operating Temperature - Junction	-65 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3 Full Pack	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the MBR2045CTF-E1 is determined by the following critical parameters:

Primary Substitution Criteria:

Diode configuration: 1 Pair Common Cathode
Technology: Schottky
Maximum reverse voltage (Vr): 45 V
Average rectified current (Io): 10 A minimum per diode
Package type: TO-220-3 Full Pack through-hole
Speed classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Secondary Compatibility Parameters:

Forward voltage (Vf) at rated current
Reverse leakage current (Ir) at maximum reverse voltage
Operating temperature range
RoHS and REACH compliance status

Substitute parts are grouped into two categories:

Direct Manufacturer Substitutes: Parts from the same manufacturer (Diodes Incorporated) with identical or superior electrical specifications and matching package configuration.

Manufacturer Recommended Substitutes: Parts from alternative manufacturers (onsemi, STMicroelectronics, Rohm Semiconductor) that meet or exceed the primary substitution criteria and are actively supported or recommended by their respective manufacturers.

Parametric Equivalents: Parts that satisfy all primary substitution criteria with minor variations in secondary parameters such as forward voltage or reverse leakage current, suitable for applications where these variations are within acceptable design margins.

Parameter Comparison

Parameter	MBR2045CTF-E1	MBR2045CTF-G1	MBRF2045CTG	MBRF30L45CTG	STPS2045CFP	RBQ20T45ANZC9
Manufacturer	Diodes Inc.	Diodes Inc.	onsemi	onsemi	STMicroelectronics	Rohm Semiconductor
Diode Configuration	1 Pair Common Cathode	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	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V	45 V	45 V
Current - Average Rectified (Io) (per Diode)	10 A	10 A	10 A	15 A	10 A	10 A
Voltage - Forward (Vf) (Max) @ If	650 mV @ 10 A	640 mV @ 10 A	570 mV @ 10 A	500 mV @ 15 A	570 mV @ 10 A	650 mV @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V	100 µA @ 45 V	100 µA @ 45 V	650 µA @ 45 V	100 µA @ 45 V	140 µA @ 45 V
Operating Temperature - Junction	-65 to 150°C	-55 to 150°C	-65 to 175°C	-55 to 150°C	Max 175°C	Max 150°C
Mounting Type	Through Hole	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	TO-220-3 Full Pack	TO-220-3 Full Pack	TO-220-3 Full Pack
Product Status	Obsolete	Obsolete	Obsolete	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Manufacturer Substitute - MBR2045CTF-G1 (Diodes Incorporated)

The MBR2045CTF-G1 is a direct substitute from the same manufacturer with identical electrical specifications and package configuration. This part carries AEC-Q101 automotive qualification and is suitable for applications requiring automotive-grade components. The forward voltage is marginally lower (640 mV vs. 650 mV), representing improved performance. The operating temperature range is -55°C to 150°C, which is narrower at the lower bound compared to the original part. Both parts are ROHS3 compliant and carry identical REACH status.

Manufacturer Recommended Substitute - MBRF2045CTG (onsemi)

The MBRF2045CTG is an onsemi SWITCHMODE™ series part meeting all primary substitution criteria with superior forward voltage performance (570 mV vs. 650 mV at 10 A). This part offers an extended maximum junction temperature of 175°C and is actively supported by onsemi. The part is ROHS3 compliant and REACH unaffected. Current availability is high (15,731 pcs in stock).

Manufacturer Recommended Substitute - STPS2045CFP (STMicroelectronics)

The STPS2045CFP is an active product from STMicroelectronics with identical electrical specifications to MBRF2045CTG, including forward voltage of 570 mV at 10 A. This part offers maximum junction temperature of 175°C and is ROHS3 compliant with REACH unaffected status. Current availability is adequate (1,490 pcs in stock).

Parametric Equivalent - RBQ20T45ANZC9 (Rohm Semiconductor)

The RBQ20T45ANZC9 is an active product from Rohm Semiconductor that satisfies all primary substitution criteria with forward voltage matching the original part (650 mV at 10 A). Reverse leakage current is slightly elevated (140 µA vs. 100 µA), which remains within acceptable engineering margins for most applications. This part is ROHS3 compliant and REACH unaffected. Current availability is adequate (1,749 pcs in stock).

Higher Current Alternative - MBRF30L45CTG (onsemi)

The MBRF30L45CTG is an onsemi SWITCHMODE™ series part with increased current rating (15 A vs. 10 A per diode) and superior forward voltage performance (500 mV at 15 A). This part is suitable for applications requiring higher current capacity while maintaining the same 45 V reverse voltage rating. Reverse leakage current is elevated (650 µA vs. 100 µA), which is a trade-off for the higher current capability. This part is ROHS3 compliant and REACH unaffected.

Selection Priority:

For direct replacement with minimal design changes: STPS2045CFP (active product status, superior performance, high availability)

For automotive-qualified applications: MBR2045CTF-G1 (automotive grade, AEC-Q101 qualified)

For extended temperature operation: MBRF2045CTG (175°C maximum junction temperature)

For higher current applications: MBRF30L45CTG (15 A per diode rating)

Frequently Asked Questions (FAQ)

Q: Can I use MBRF30L45CTG as a direct replacement for MBR2045CTF-E1?

A: MBRF30L45CTG is electrically compatible but not a direct replacement. It has a higher current rating (15 A vs. 10 A per diode) and different reverse leakage characteristics (650 µA vs. 100 µA). Use this part only if your application requires the higher current capacity. The elevated reverse leakage current must be evaluated against your circuit design requirements.

Q: What is the difference between MBR2045CTF-G1 and MBRF2045CTG?

A: Both parts meet the primary substitution criteria. MBR2045CTF-G1 is from Diodes Incorporated with AEC-Q101 automotive qualification and narrower operating temperature range (-55°C to 150°C). MBRF2045CTG is from onsemi with extended temperature range (-65°C to 175°C) and lower forward voltage (570 mV vs. 640 mV). Select MBR2045CTF-G1 for automotive applications; select MBRF2045CTG for extended temperature or improved efficiency requirements.

Q: Are all substitute parts in the same TO-220-3 package?

A: All substitute parts listed are packaged in TO-220-3 Full Pack through-hole format. However, the supplier device package designations vary slightly (TO-220F-3, TO-220FP, TO-220FN). These variations represent minor physical differences in lead configuration and thermal characteristics. Verify mechanical fit and thermal interface requirements for your specific PCB layout before final selection.

Q: Which substitute part has the best forward voltage performance?

A: MBRF30L45CTG has the lowest forward voltage at 500 mV (measured at 15 A). For 10 A operation, MBRF2045CTG and STPS2045CFP both offer 570 mV forward voltage, representing a 80 mV improvement over the original MBR2045CTF-E1 specification of 650 mV.

Q: Can I use an active product substitute instead of an obsolete part?

A: Yes. STPS2045CFP and RBQ20T45ANZC9 are both active products with current manufacturing support. Active products are preferred for new designs and ongoing production to ensure long-term supply chain stability and access to technical support.

Q: What is the significance of REACH and RoHS compliance for these parts?

A: All listed parts are ROHS3 compliant, indicating compliance with the Restriction of Hazardous Substances Directive. REACH status indicates regulatory compliance under the European Registration, Evaluation, Authorization and Restriction of Chemicals regulation. MBRF2045CTG, MBRF30L45CTG, STPS2045CFP, and RBQ20T45ANZC9 are REACH unaffected, while MBR2045CTF-E1 and MBR2045CTF-G1 are REACH affected. Verify compliance requirements for your application and target market.

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

A: This configuration contains two diodes with a shared cathode terminal. The common cathode connection allows both diodes to share a single return path, reducing the number of external connections required. All substitute parts maintain this same configuration, ensuring functional compatibility in circuits designed for common cathode diode arrays.

Q: How do I determine which substitute part is best for my application?

A: Evaluate your application requirements against these factors: (1) Current rating requirement (10 A or 15 A); (2) Operating temperature range; (3) Forward voltage loss and efficiency requirements; (4) Reverse leakage current tolerance; (5) Automotive or industrial qualification requirements; (6) Supply chain availability and long-term support. Cross-reference these requirements with the parameter comparison table to identify the optimal substitute.

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