30CTQ045S Equivalent & Substitute Parts

Part Overview

The 30CTQ045S is a Schottky diode array manufactured by SMC Diode Solutions, configured as a 1 Pair Common Cathode arrangement rated for 45 V DC reverse voltage and 15 A average rectified current per diode. The device is packaged in a Surface Mount TO-263-3 (D2PAK) configuration with 2 leads plus tab, suitable for high-frequency rectification applications requiring fast recovery characteristics.

The 30CTQ045S maintains Active product status with 1340 units currently in stock. Identification of equivalent substitute parts is necessary to support supply chain continuity, provide design flexibility across manufacturing sources, and accommodate procurement requirements when primary inventory becomes unavailable.

Substiute Parts

30CTQ045S

SMC Diode SolutionsIn Stock: 137430CTQ045S Datasheet

Current PartRFQ

MBRB30H45CTHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 2671MBRB30H45CTHE3_B/I Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 30CTQ045S are identified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Mandatory Matching Parameters:

• 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: 620 mV @ 15 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitute part MBRB30H45CTHE3_B/I meets all mandatory electrical and mechanical parameters. Variations in reverse leakage current and operating temperature range do not preclude substitution when the primary part becomes unavailable, as these parameters remain within acceptable design tolerances for equivalent circuit performance.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: 30CTQ045S (SMC Diode Solutions)

The 30CTQ045S is the recommended primary selection for new designs and ongoing production. The device maintains Active product status with established supply availability (1340 units in stock). This part is suitable for applications requiring standard industrial-grade Schottky diode array performance without automotive qualification requirements.

Substitute Selection: MBRB30H45CTHE3_B/I (Vishay General Semiconductor)

The MBRB30H45CTHE3_B/I is a direct electrical and mechanical equivalent suitable for substitution when 30CTQ045S availability is constrained. This part carries Automotive grade designation with AEC-Q101 qualification, making it appropriate for applications requiring automotive-level reliability and traceability. The extended lower operating temperature range (-65°C versus -55°C) provides additional thermal margin in cold-environment applications.

The MBRB30H45CTHE3_B/I carries Last Time Buy status, indicating limited future availability. This part should be selected only when supply continuity of the primary 30CTQ045S cannot be assured, or when automotive qualification is a design requirement.

Both parts are ROHS3 compliant and carry unlimited moisture sensitivity classification (MSL 1), eliminating moisture-related handling constraints during assembly and storage.

Frequently Asked Questions (FAQ)

Q: Can MBRB30H45CTHE3_B/I be used as a direct replacement for 30CTQ045S in existing designs?

A: Yes. Both parts share identical electrical ratings (45 V reverse voltage, 15 A average rectified current, 620 mV forward voltage at 15 A) and identical package configuration (TO-263-3 D2PAK). Pin-to-pin compatibility is confirmed. The MBRB30H45CTHE3_B/I exhibits lower reverse leakage current (80 µA versus 1 mA) and extended lower temperature range (-65°C versus -55°C), both of which are performance improvements for most applications.

Q: What is the difference in reverse leakage current between these parts?

A: The 30CTQ045S specifies 1 mA reverse leakage at 45 V, while the MBRB30H45CTHE3_B/I specifies 80 µA at the same conditions. The Vishay part exhibits approximately 12.5 times lower leakage. This difference does not prevent substitution; lower leakage is generally beneficial for circuit performance and power efficiency.

Q: Are there package or pinout differences between these parts?

A: No. Both parts use identical TO-263-3 (D2PAK) packaging with 2 leads plus tab. Pinout and mechanical dimensions are identical, enabling direct PCB footprint compatibility without layout modifications.

Q: Why does MBRB30H45CTHE3_B/I have automotive qualification while 30CTQ045S does not?

A: The MBRB30H45CTHE3_B/I carries AEC-Q101 automotive qualification and Automotive grade designation, indicating compliance with automotive industry reliability and testing standards. The 30CTQ045S is specified as standard industrial grade. Automotive qualification is not required for general industrial applications but is mandatory for automotive and safety-critical applications.

Q: What is the significance of "Last Time Buy" status for MBRB30H45CTHE3_B/I?

A: Last Time Buy status indicates that Vishay has announced end-of-life for this part number. Existing inventory (2657 units) represents the final available stock. This part should be selected only when 30CTQ045S supply is unavailable or when automotive qualification is a design requirement. For new designs with long production lifecycles, the 30CTQ045S (Active status) is the preferred choice.

Q: Are both parts RoHS compliant?

A: Yes. Both 30CTQ045S and MBRB30H45CTHE3_B/I are ROHS3 compliant, confirming elimination of restricted substances (lead, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and bis(2-ethylhexyl) phthalate).

Q: What is the moisture sensitivity classification for these parts?

A: Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity constraints. These parts do not require special moisture-controlled storage or handling procedures during assembly and can be stored under standard industrial conditions.