MBR2045CTH Equivalent & Substitute Parts

Part Overview

The MBR2045CTH is a Schottky diode array manufactured by onsemi, configured as 1 pair common cathode with 45 V reverse voltage rating and 10 A average rectified current per diode. The device is packaged in TO-220-3 through-hole configuration and operates across a junction temperature range of -65°C to 175°C. This part is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design requirements and procurement needs.

Substiute Parts

MBR2045CTH

onsemiIn Stock: 1052MBR2045CTH Datasheet

Current PartRFQ

STPS2045CT

STMicroelectronicsIn Stock: 25174STPS2045CT Datasheet

DirectRFQ

STPS40L45CT

STMicroelectronicsIn Stock: 17925STPS40L45CT Datasheet

SimilarRFQ

VS-MBR2045CT-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 6257VS-MBR2045CT-M3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBR2045CTH is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Diode configuration: 1 pair common cathode
• Technology: Schottky
• Voltage rating: 45 V DC reverse maximum
• Current rating: 10 A average rectified per diode
• Package: TO-220-3 through-hole
• Speed classification: Fast recovery ≤ 500ns

Direct Equivalent Classification: Parts meeting all primary criteria without derating are classified as direct equivalents. The STPS2045CT (STMicroelectronics) and VS-MBR2045CT-M3 (Vishay) satisfy these requirements.

Functional Equivalent Classification: The STPS40L45CT (STMicroelectronics) provides the same voltage rating and package but with doubled current capacity (20 A per diode). This part functions as a higher-capacity alternative suitable for applications where current margin is required, though it introduces parameter variations in forward voltage and reverse leakage.

Parameter Comparison

Engineering Selection Recommendations

STPS2045CT (STMicroelectronics) - Primary Direct Equivalent

The STPS2045CT provides direct electrical and mechanical equivalence to the MBR2045CTH across all critical parameters. Both devices share identical current rating (10 A), voltage rating (45 V), forward voltage characteristics (570 mV @ 10 A), and reverse leakage (100 µA @ 45 V). The STPS2045CT is classified as active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). This part is suitable for direct replacement in applications requiring no design modification.

VS-MBR2045CT-M3 (Vishay) - Direct Equivalent Alternative

The VS-MBR2045CT-M3 maintains electrical equivalence in voltage rating (45 V), current rating (10 A), and reverse leakage (100 µA @ 45 V). This device is active product status with ROHS3 compliance. The forward voltage specification differs at 840 mV @ 20 A, which represents a higher measurement condition than the MBR2045CTH specification. The operating temperature range extends to 150°C maximum, which is lower than the original part's 175°C maximum. This part is suitable for direct replacement where thermal headroom exists.

STPS40L45CT (STMicroelectronics) - Functional Equivalent with Higher Current Capacity

The STPS40L45CT maintains the 45 V voltage rating and TO-220-3 package but provides doubled current capacity at 20 A per diode. Forward voltage is specified at 530 mV @ 20 A, representing improved efficiency at higher current levels. Reverse leakage increases to 600 µA @ 45 V. Operating temperature maximum is 150°C. This part functions as a higher-capacity alternative for applications where current margin or thermal performance improvement is required, though it introduces parameter variations that must be evaluated against circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can STPS2045CT directly replace MBR2045CTH without circuit modification?

A: Yes. The STPS2045CT provides direct electrical equivalence across voltage rating (45 V), current rating (10 A per diode), forward voltage (570 mV @ 10 A), and reverse leakage (100 µA @ 45 V). Both devices use identical TO-220-3 through-hole packaging. No circuit modification is required.

Q: What are the differences between STPS2045CT and VS-MBR2045CT-M3?

A: Both parts provide 45 V voltage rating and 10 A current rating in TO-220-3 packaging. The STPS2045CT specifies forward voltage at 570 mV @ 10 A, while VS-MBR2045CT-M3 specifies 840 mV @ 20 A. The STPS2045CT maximum operating temperature is 175°C; VS-MBR2045CT-M3 is 150°C. Both are active products with ROHS3 compliance.

Q: When should STPS40L45CT be selected instead of STPS2045CT?

A: The STPS40L45CT provides 20 A current capacity per diode compared to 10 A in STPS2045CT, with identical 45 V voltage rating and TO-220-3 package. Selection of STPS40L45CT is appropriate when circuit design requires higher current margin or when thermal performance improvement from lower forward voltage (530 mV @ 20 A) is beneficial. The increased reverse leakage (600 µA @ 45 V) and lower maximum operating temperature (150°C) must be evaluated against application requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. STPS2045CT, STPS40L45CT, and VS-MBR2045CT-M3 are all ROHS3 compliant, matching the compliance status of the original MBR2045CTH.

Q: What is the moisture sensitivity level (MSL) of substitute parts?

A: STPS2045CT, STPS40L45CT, and VS-MBR2045CT-M3 are all classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

Q: Can substitute parts be used in applications with operating temperatures above 150°C?

A: STPS2045CT supports junction temperatures to 175°C maximum, matching the original MBR2045CTH specification. STPS40L45CT and VS-MBR2045CT-M3 are limited to 150°C maximum junction temperature. For applications requiring operation above 150°C, STPS2045CT is the appropriate selection.