MBRB2545CTT4G Equivalent & Substitute Parts

Part Overview

The MBRB2545CTT4G 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 device is housed in a TO-263-3 D2PAK surface mount package and is classified as an active product with ROHS3 compliance. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same package footprint and functional configuration.

Substiute Parts

MBRB2545CTT4G

onsemiIn Stock: 53571MBRB2545CTT4G Datasheet

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STPS3045CG-TR

STMicroelectronicsIn Stock: 2884STPS3045CG-TR Datasheet

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STPS3045CGY-TR

STMicroelectronicsIn Stock: 19332STPS3045CGY-TR Datasheet

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STPS30L45CG-TR

STMicroelectronicsIn Stock: 5228STPS30L45CG-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRB2545CTT4G is determined by strict equivalence in the following parameters:

• Diode Configuration: 1 Pair Common Cathode (electrical topology must match)
• Technology: Schottky (device type must remain consistent)
• Voltage - DC Reverse (Vr) (Max): 45 V (maximum reverse voltage rating must be equal or greater)
• Current - Average Rectified (Io) (per Diode): 15 A (current handling capability must be equal or greater)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (switching characteristics must meet or exceed specification)
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB (physical footprint and pin configuration must be identical)
• Mounting Type: Surface Mount (assembly method must be compatible)
• RoHS Status: ROHS3 Compliant (regulatory compliance must be maintained)

All substitute parts listed meet these core requirements. Variations in forward voltage (Vf), reverse leakage current (Ir), maximum junction temperature, and packaging format (Tape & Reel versus Cut Tape) do not disqualify substitution when the primary electrical and mechanical parameters are satisfied.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts—STPS3045CG-TR, STPS3045CGY-TR, and STPS30L45CG-TR—are functionally equivalent to the MBRB2545CTT4G based on core electrical and mechanical parameters. All devices maintain active product status and ROHS3 compliance.

STPS3045CGY-TR carries automotive-grade qualification with AEC-Q101 certification. This variant is suitable for applications requiring automotive-level reliability and traceability standards.

STPS3045CG-TR and STPS30L45CG-TR are industrial-grade alternatives without automotive qualification. Selection between these two depends on packaging format requirements: STPS3045CG-TR is supplied in Cut Tape & Digi-Reel format, while STPS30L45CG-TR is supplied in Tape & Reel format, matching the original MBRB2545CTT4G packaging.

Forward voltage characteristics differ across substitutes. The MBRB2545CTT4G exhibits higher forward voltage (820 mV @ 30 A) compared to STMicroelectronics alternatives (550–570 mV @ 15 A). Reverse leakage current in STPS30L45CG-TR is elevated to 400 µA @ 45 V relative to 200 µA @ 45 V in other variants. Maximum junction temperature ratings vary: STPS3045CG-TR and STPS3045CGY-TR support 200°C, while STPS30L45CG-TR is limited to 150°C.

Frequently Asked Questions (FAQ)

Q: Can STPS3045CG-TR be used as a direct replacement for MBRB2545CTT4G?

A: Yes. Both devices share identical diode configuration (1 pair common cathode), technology (Schottky), voltage rating (45 V), current rating (15 A per diode), switching speed (fast recovery ≤ 500ns), and package footprint (TO-263-3 D2PAK). Electrical performance differences in forward voltage and reverse leakage do not prevent functional substitution in applications designed for the MBRB2545CTT4G.

Q: What is the difference between STPS3045CG-TR and STPS3045CGY-TR?

A: Both parts are electrically and mechanically identical. STPS3045CGY-TR carries automotive-grade qualification and AEC-Q101 certification, making it suitable for automotive applications requiring documented reliability standards. STPS3045CG-TR is the industrial-grade equivalent without automotive qualification.

Q: Does packaging format (Tape & Reel versus Cut Tape) affect electrical performance?

A: No. Packaging format affects only handling, storage, and assembly logistics. MBRB2545CTT4G and STPS30L45CG-TR are both supplied in Tape & Reel format. STPS3045CG-TR and STPS3045CGY-TR are supplied in Cut Tape & Digi-Reel format. The electrical and mechanical specifications remain unchanged regardless of packaging format.

Q: Are there temperature rating differences between substitutes?

A: Yes. STPS3045CG-TR and STPS3045CGY-TR support maximum junction temperatures of 200°C, while STPS30L45CG-TR is rated to 150°C maximum. The MBRB2545CTT4G operates across a range of -65°C to 175°C. Applications operating near upper temperature limits should account for these differences.

Q: Is reverse leakage current a concern when substituting STPS30L45CG-TR?

A: STPS30L45CG-TR exhibits reverse leakage of 400 µA @ 45 V, double that of other variants (200 µA @ 45 V). In applications sensitive to leakage current, this difference must be evaluated against circuit requirements. For most general-purpose rectification applications, this variation is not critical.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. All substitute parts—STPS3045CG-TR, STPS3045CGY-TR, and STPS30L45CG-TR—are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity). Regulatory compliance is maintained across all alternatives.