Equivalent & Substitute Parts for C3045CT-G Schottky Diode Array

Part Overview

The C3045CT-G is a Schottky diode array manufactured by Comchip Technology, configured as 1 pair common cathode with 45 V reverse voltage rating and 30 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 150°C. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity.

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)	30	A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 15 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500	µA @ 45 V
Operating Temperature - Junction	-65 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the C3045CT-G is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Diode configuration: 1 pair common cathode
Technology: Schottky
Voltage rating: 45 V DC reverse
Current rating: 30 A average rectified per diode
Forward voltage: 550 mV @ 15 A
Recovery speed: Fast recovery ≤ 500ns, > 200mA
Mounting type: Through hole
Package: TO-220-3 or compatible package footprint

Substitution Categories:

Parametric Equivalents (Full Electrical Match): Parts meeting all electrical specifications with identical or superior performance characteristics and matching package configuration.

Manufacturer Recommended Substitutes (Reduced Current Rating): Parts with identical voltage and configuration but reduced current rating, suitable for applications not requiring full 30 A capacity.

Package Variant Equivalents (Electrical Match, Different Package): Parts with identical electrical specifications but alternative through-hole package configuration.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io per Diode [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Tj Range [°C]	Package	Product Status
C3045CT-G	Comchip Technology	45	30	550 @ 15 A	500 @ 45 V	-65 to 150	TO-220-3	Obsolete
MBR30L45CT	Taiwan Semiconductor Corporation	45	30	550 @ 15 A	400 @ 45 V	-55 to 150	TO-220-3	Active
SB3045CT_T0_00001	Panjit International Inc.	45	30	550 @ 15 A	200 @ 45 V	-55 to 150	TO-220-3	Active
SB3045PT_T0_00001	Panjit International Inc.	45	30	550 @ 15 A	200 @ 45 V	-55 to 150	TO-247-3	Active
MBR2545CTG	onsemi	45	15	620 @ 15 A	200 @ 45 V	-65 to 175	TO-220-3	Active
MBR20L45CTG	onsemi	45	10	500 @ 10 A	500 @ 45 V	-55 to 150	TO-220-3	Obsolete

Engineering Selection Recommendations

Parametric Equivalent Selection (Preferred):

MBR30L45CT (Taiwan Semiconductor Corporation) and SB3045CT_T0_00001 (Panjit International Inc.) are parametric equivalents meeting all electrical specifications of the C3045CT-G. Both parts are active products with ROHS3 compliance and REACH unaffected status. MBR30L45CT exhibits lower reverse leakage (400 µA vs. 500 µA) and maintains the original temperature range minimum of -55°C. SB3045CT_T0_00001 provides superior reverse leakage performance (200 µA) with identical electrical characteristics. Both are packaged in TO-220-3 configuration with through-hole mounting.

Package Variant Selection:

SB3045PT_T0_00001 (Panjit International Inc.) provides identical electrical performance to SB3045CT_T0_00001 in TO-247-3 package configuration. This variant is suitable for applications where TO-247-3 footprint compatibility is required or preferred for thermal management.

Reduced Current Rating Selection:

MBR2545CTG (onsemi) operates at 15 A average rectified current with 45 V reverse voltage rating in TO-220-3 package. This part is active and extends the operating temperature range to -65°C to 175°C. Selection is appropriate for applications requiring current capacity of 15 A or less.

MBR20L45CTG (onsemi) operates at 10 A average rectified current. This part is classified as obsolete and is not recommended for new designs.

Compliance Verification:

All recommended substitute parts maintain ROHS3 compliance and are classified as REACH unaffected. Moisture sensitivity level is 1 (unlimited) for all parametric equivalents, matching the original part specification.

Frequently Asked Questions (FAQ)

Q: Can MBR30L45CT directly replace C3045CT-G in existing designs?

A: Yes. MBR30L45CT is a parametric equivalent with identical voltage rating (45 V), current rating (30 A), forward voltage (550 mV @ 15 A), and package configuration (TO-220-3). The part is active and maintains ROHS3 compliance. The operating temperature range minimum is -55°C compared to -65°C for the original part; verify application requirements if operation below -55°C is required.

Q: What is the difference between SB3045CT_T0_00001 and SB3045PT_T0_00001?

A: Both parts are electrically identical with 45 V reverse voltage, 30 A current rating, and 550 mV forward voltage. The primary difference is package configuration: SB3045CT_T0_00001 uses TO-220-3 package, while SB3045PT_T0_00001 uses TO-247-3 package. Selection depends on PCB footprint requirements and thermal management considerations.

Q: Is MBR2545CTG suitable as a substitute for C3045CT-G?

A: MBR2545CTG is suitable only for applications where the required current does not exceed 15 A. The part maintains 45 V reverse voltage rating and TO-220-3 package compatibility. Forward voltage is 620 mV @ 15 A, which is higher than the original 550 mV specification. The part is active and extends the operating temperature range to 175°C maximum.

Q: Why is MBR20L45CTG not recommended?

A: MBR20L45CTG is classified as obsolete and operates at only 10 A average rectified current, significantly below the 30 A requirement of the original part. This part is not suitable for direct substitution.

Q: Are all recommended substitutes through-hole mounted?

A: Yes, all recommended parametric equivalents and the MBR2545CTG substitute are through-hole mounted. SB3045PT_T0_00001 uses TO-247-3 package, which is also through-hole mounted but with different footprint dimensions compared to TO-220-3.

Q: What compliance certifications apply to substitute parts?

A: All recommended substitute parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (unlimited) for all parametric equivalents, matching the original specification.

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