CPH3457-TL-H N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The CPH3457-TL-H is an N-Channel MOSFET manufactured by onsemi, rated for 30V drain-to-source voltage with 3A continuous drain current at 25°C. This device is packaged in a surface-mount TO-236-3 (SOT-23-3) configuration and is designed for general-purpose switching applications requiring low on-resistance performance.

The CPH3457-TL-H carries an Obsolete product status. Locating equivalent or substitute components is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this part.

Substiute Parts

CPH3457-TL-H

onsemiIn Stock: 20234CPH3457-TL-H Datasheet

Current PartRFQ

DMN3110S-7

Diodes IncorporatedIn Stock: 17680DMN3110S-7 Datasheet

SimilarRFQ

PMV90ENER

Nexperia USA Inc.In Stock: 4025PMV90ENER Datasheet

SimilarRFQ

RTR030N05TL

Rohm SemiconductorIn Stock: 125220RTR030N05TL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CPH3457-TL-H is determined by the following critical parameters:

Mandatory Matching Criteria:

• FET Type: N-Channel
• Technology: MOSFET (Metal Oxide)
• Drain to Source Voltage (Vdss): Minimum 30V
• Continuous Drain Current (Id): Minimum 3A at 25°C
• Mounting Type: Surface Mount
• Package Compatibility: TO-236-3, SC-59, or SOT-23-3 footprint

Performance Parameters for Evaluation:

• On-Resistance (Rds On): Lower values indicate improved performance
• Gate Charge (Qg): Lower values reduce switching losses
• Input Capacitance (Ciss): Affects gate drive requirements
• Power Dissipation: Thermal management capability
• Operating Temperature Range: Maximum junction temperature of 150°C or higher

Substitute parts must satisfy all mandatory matching criteria. Performance parameters may vary within acceptable ranges for the target application.

Parameter Comparison

Engineering Selection Recommendations

DMN3110S-7 (Diodes Incorporated)

The DMN3110S-7 is an Active product with ROHS3 compliance. This part meets the 30V Vdss requirement and maintains the SOT-23-3 package footprint. The continuous drain current rating of 2.5A is 0.5A below the original specification. This part is suitable for applications where the 3A current requirement can be reduced or where thermal management allows operation at lower current levels. The lower power dissipation rating (740mW) requires thermal design verification for equivalent power handling.

PMV90ENER (Nexperia USA Inc.)

The PMV90ENER carries a "Not For New Designs" product status, indicating limited future availability and manufacturer support. While this part matches the 30V Vdss and 3A Id specifications with improved on-resistance (72mOhm) and lower power dissipation (460mW), its restricted status makes it unsuitable for new production designs. This part may be considered only for legacy system maintenance where supply is confirmed.

RTR030N05TL (Rohm Semiconductor)

The RTR030N05TL is an Active product with ROHS3 compliance. This part exceeds the 30V Vdss requirement with a 45V rating and maintains 3A continuous drain current. The package is SC-96 (TSMT3), which differs from the original TO-236-3 footprint. PCB layout modification is required for this substitution. The improved on-resistance (67mOhm) and matching power dissipation (1W) provide equivalent thermal performance. This part is suitable for applications where package footprint change is acceptable and higher voltage rating provides design margin.

Frequently Asked Questions (FAQ)

Q: Can the DMN3110S-7 be used as a direct replacement for the CPH3457-TL-H?

A: The DMN3110S-7 is electrically compatible with the CPH3457-TL-H for 30V applications and uses the same SOT-23-3 package footprint. However, the continuous drain current rating is 2.5A versus 3A for the original part. Applications operating at or near 3A continuous current require thermal analysis to confirm the lower power dissipation rating (740mW) is adequate.

Q: What is the primary difference between the PMV90ENER and the CPH3457-TL-H?

A: Both parts share identical voltage (30V) and current (3A) ratings with compatible SOT-23-3 packaging. The PMV90ENER offers superior on-resistance (72mOhm versus 95mOhm) and lower power dissipation (460mW versus 1W). The critical limitation is the "Not For New Designs" status, restricting its use to legacy applications only.

Q: Why does the RTR030N05TL have a different package designation?

A: The RTR030N05TL uses the SC-96 (TSMT3) package, which is a different surface-mount footprint than the original TO-236-3 (SOT-23-3). While both are surface-mount packages, PCB layout and land pattern modifications are required. The higher voltage rating (45V) provides additional design margin for applications with voltage transients or overvoltage conditions.

Q: Are all substitute parts RoHS compliant?

A: The DMN3110S-7, PMV90ENER, and RTR030N05TL are all ROHS3 compliant. The original CPH3457-TL-H does not specify RoHS status. All substitute parts maintain REACH Unaffected status, matching the original part's regulatory classification.

Q: Which substitute part offers the best on-resistance performance?

A: The RTR030N05TL provides the lowest on-resistance at 67mOhm (measured at 3A, 4.5V), followed by the PMV90ENER at 72mOhm (measured at 3A, 10V). The original CPH3457-TL-H specifies 95mOhm at 1.5A, 4.5V. Lower on-resistance reduces power dissipation and heat generation during switching operations.

Q: Can the RTR030N05TL be used in applications designed for 30V maximum?

A: Yes. The RTR030N05TL is rated for 45V Vdss, which exceeds the 30V requirement. The higher voltage rating does not create compatibility issues in 30V applications; it provides additional safety margin. However, the package footprint change (SC-96 versus SOT-23-3) requires PCB redesign.

Q: What is the moisture sensitivity level for all parts?

A: All parts, including the original CPH3457-TL-H and all substitute options, carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions during storage or handling.