CPH6347-TL-W Equivalent & Substitute Parts

Part Overview

The CPH6347-TL-W is a P-Channel MOSFET manufactured by onsemi, rated for 20V drain-to-source voltage with 6A continuous drain current at 25°C. This device is packaged in a 6-CPH (SOT-23-6 Thin) surface mount configuration and is designed for applications requiring P-channel switching and amplification in compact form factors.

The CPH6347-TL-W carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	20	V
Current - Continuous Drain (Id) @ 25°C	6	A
Rds On (Max) @ Id, Vgs	39 mOhm @ 3A, 4.5V	—
Power Dissipation (Max)	1.6	W
Vgs (Max)	±12	V
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-23-6 Thin, TSOT-23-6	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CPH6347-TL-W is determined by the following critical parameters:

Electrical Compatibility Requirements:

FET Type: P-Channel (required match)
Drain to Source Voltage (Vdss): 20V (required match)
Continuous Drain Current (Id): minimum 5.2A (CPH6347-TL-W rated 6A)
Gate-Source Voltage (Vgs Max): ±12V (required match)
Power Dissipation: minimum 1.6W

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount (required match)
Package / Case: SOT-23-6 or equivalent footprint compatibility

Compliance Requirements:

RoHS3 Compliant (required match)
Moisture Sensitivity Level: MSL 1 or MSL 3 acceptable for unlimited or 168-hour storage

The three substitute parts listed below meet these criteria and are qualified for direct replacement in applications designed for the CPH6347-TL-W.

Parameter Comparison

Parameter	CPH6347-TL-W	FDC608PZ	PJS6415A_S2_00001	TSM3443CX6 RFG
Manufacturer	onsemi	onsemi	Panjit International Inc.	Taiwan Semiconductor Corporation
FET Type	P-Channel	P-Channel	P-Channel	P-Channel
Drain to Source Voltage (Vdss)	20 V	20 V	20 V	20 V
Current - Continuous Drain (Id) @ 25°C	6 A	5.8 A	5.2 A	4.7 A
Rds On (Max) @ Id, Vgs	39 mOhm @ 3A, 4.5V	30 mOhm @ 5.8A, 4.5V	46 mOhm @ 5.2A, 4.5V	60 mOhm @ 4.7A, 4.5V
Vgs(th) (Max) @ Id	1.4 V @ 1 mA	1.5 V @ 250 µA	1.3 V @ 250 µA	1.4 V @ 250 µA
Gate Charge (Qg) (Max) @ Vgs	10.5 nC @ 4.5 V	23 nC @ 4.5 V	10 nC @ 4.5 V	9 nC @ 4.5 V
Vgs (Max)	±12 V	±12 V	±12 V	±12 V
Input Capacitance (Ciss) (Max) @ Vds	860 pF @ 10 V	1330 pF @ 10 V	980 pF @ 10 V	640 pF @ 10 V
Power Dissipation (Max)	1.6 W	1.6 W	2 W	2 W
Operating Temperature (TJ)	150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOT-23-6 Thin, TSOT-23-6	SOT-23-6 Thin, TSOT-23-6	SOT-23-6	SOT-23-6
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

FDC608PZ (onsemi PowerTrench® Series)

The FDC608PZ is an active product from onsemi with electrical specifications closely aligned to the CPH6347-TL-W. It delivers 5.8A continuous drain current at 25°C, representing a 3.3% reduction from the original 6A specification. The FDC608PZ exhibits superior on-resistance performance at 30 mOhm compared to the CPH6347-TL-W at 39 mOhm, resulting in lower power dissipation in switching applications. Both devices share identical power dissipation ratings of 1.6W and maintain MSL 1 moisture sensitivity classification. The FDC608PZ is packaged in SuperSOT™-6, which maintains SOT-23-6 footprint compatibility. This substitute is recommended for applications where the onsemi product line continuity and enhanced thermal performance are prioritized.

PJS6415A_S2_00001 (Panjit International Inc.)

The PJS6415A_S2_00001 is an active product offering 5.2A continuous drain current, representing an 13.3% reduction from the CPH6347-TL-W specification. This device provides the lowest on-resistance among substitutes at 46 mOhm and includes increased power dissipation capability at 2W. The gate charge specification of 10 nC closely matches the original part at 10.5 nC, supporting equivalent switching speed characteristics. The PJS6415A_S2_00001 maintains SOT-23-6 package compatibility and MSL 1 classification. This substitute is suitable for applications where current margin is available and enhanced thermal headroom is beneficial.

TSM3443CX6 RFG (Taiwan Semiconductor Corporation)

The TSM3443CX6 RFG is an active product rated for 4.7A continuous drain current, representing a 21.7% reduction from the CPH6347-TL-W specification. This device exhibits the lowest input capacitance at 640 pF and the lowest gate charge at 9 nC, supporting faster switching transitions. Power dissipation capability is rated at 2W. The TSM3443CX6 RFG carries MSL 3 classification, requiring controlled storage conditions of 168 hours maximum at specified humidity levels. This substitute is applicable to applications where current headroom exists and switching speed optimization is required, provided moisture sensitivity handling procedures are implemented.

All three substitute parts maintain ROHS3 compliance, ±12V gate-source voltage rating, and 20V drain-to-source voltage specification. Selection among these substitutes depends on application current requirements, thermal management constraints, and moisture handling capabilities.

Frequently Asked Questions (FAQ)

Q: Can the FDC608PZ directly replace the CPH6347-TL-W in all applications?

A: The FDC608PZ is electrically and mechanically compatible with the CPH6347-TL-W for applications where the 5.8A continuous drain current specification meets or exceeds the design requirement. The 3.3% current reduction and improved on-resistance characteristics make this substitute suitable for most switching applications. Verify that the application current demand does not exceed 5.8A at 25°C ambient temperature.

Q: What is the significance of the MSL 3 rating on the TSM3443CX6 RFG?

A: MSL 3 classification indicates that the TSM3443CX6 RFG requires storage in controlled humidity conditions with a maximum floor life of 168 hours at 30°C and 85% relative humidity before reflow soldering. The CPH6347-TL-W and FDC608PZ carry MSL 1 classification, allowing unlimited storage without humidity control. Organizations using the TSM3443CX6 RFG must implement moisture-sensitive device handling procedures, including desiccant storage and bake-out protocols prior to assembly.

Q: How do the on-resistance specifications affect circuit performance?

A: On-resistance (Rds On) directly determines power dissipation during conduction. The FDC608PZ at 30 mOhm provides the lowest on-resistance, resulting in reduced heat generation compared to the CPH6347-TL-W at 39 mOhm. In high-frequency switching applications or designs with thermal constraints, the FDC608PZ offers improved efficiency. The PJS6415A_S2_00001 at 46 mOhm and TSM3443CX6 RFG at 60 mOhm represent progressively higher on-resistance values and should be evaluated against thermal budget requirements.

Q: Are package dimensions identical across all substitute parts?

A: All substitute parts are specified for SOT-23-6 package compatibility. The CPH6347-TL-W uses 6-CPH (SOT-23-6 Thin) packaging, the FDC608PZ uses SuperSOT™-6, and both PJS6415A_S2_00001 and TSM3443CX6 RFG use standard SOT-23-6. While these packages share the same footprint and pin configuration, physical dimensions may vary slightly. Verify PCB layout compatibility with the specific substitute part datasheet before finalizing board design.

Q: What is the impact of gate charge differences on circuit design?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. The CPH6347-TL-W specifies 10.5 nC at 4.5V. The FDC608PZ at 23 nC requires approximately 2.2 times more gate charge, potentially increasing driver power consumption and switching losses. The PJS6415A_S2_00001 at 10 nC and TSM3443CX6 RFG at 9 nC provide lower gate charge, supporting faster switching transitions and reduced driver requirements. Applications with current-limited gate drivers should prioritize substitutes with lower gate charge specifications.

Q: Can the CPH6347-TL-W be used interchangeably with these substitutes in existing designs?

A: The CPH6347-TL-W is obsolete and no longer available from onsemi. Existing designs must transition to one of the active substitute parts. The FDC608PZ is the recommended primary substitute due to onsemi product line continuity and closest electrical alignment. The PJS6415A_S2_00001 and TSM3443CX6 RFG are qualified alternatives for applications where current margin exists. All substitutes require verification against application current, thermal, and switching speed requirements before implementation.

Q: What compliance certifications are maintained across all parts?

A: All parts, including the CPH6347-TL-W and the three substitute options, maintain ROHS3 compliance and REACH Unaffected status. All parts are classified under ECCN EAR99 and HTSUS 8541.29.0095. These certifications ensure regulatory compliance for commercial and industrial applications across regulated markets.

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