CPH6341-TL-E P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The CPH6341-TL-E is a P-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) manufactured by onsemi, rated for 30V drain-to-source voltage with 5A continuous drain current at 25°C. The device is housed in a 6-CPH surface mount package (SOT-23-6) and dissipates a maximum of 1.6W at ambient temperature.

This part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility with existing designs. Substitute parts must satisfy the core electrical parameters: 30V Vdss rating, compatible drain current specifications, matching gate voltage characteristics, and surface mount packaging suitable for automated assembly.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	30	V
Current - Continuous Drain (Id) @ 25°C	5	A (Ta)
Rds On (Max) @ Id, Vgs	59 mOhm @ 3A, 10V	—
Gate Charge (Qg) (Max) @ Vgs	10	nC @ 10V
Vgs (Max)	±20	V
Input Capacitance (Ciss) (Max) @ Vds	430	pF @ 10V
Power Dissipation (Max)	1.6	W (Ta)
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-23-6	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CPH6341-TL-E is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

FET Type: P-Channel topology
Drain to Source Voltage (Vdss): 30V minimum rating
Continuous Drain Current (Id): 5A or greater at 25°C
Gate Voltage (Vgs): ±20V maximum rating
Mounting Type: Surface Mount
Package compatibility: SOT-23-6 or equivalent 6-pin surface mount packages

Secondary Compatibility Factors:

On-resistance (Rds On): Lower or equivalent values preferred for thermal performance
Gate Charge (Qg): Lower values reduce switching losses
Input Capacitance (Ciss): Lower values improve switching speed
Power Dissipation: Thermal capability must support application requirements
RoHS and MSL compliance: Environmental and handling standards

Substitute parts are classified into two categories:

Direct Substitutes: Parts with identical or superior electrical specifications and matching package footprints, enabling pin-for-pin replacement without circuit modification.

Functional Equivalents: Parts meeting core electrical requirements (Vdss, Id, Vgs) with package variations or minor specification differences, requiring PCB layout evaluation for compatibility.

Parameter Comparison

Parameter	CPH6341-TL-E (Main)	CPH6341-TL-W	AO6405	RRQ030P03TR	RRQ045P03TR	STT4P3LLH6
Manufacturer	onsemi	onsemi	Alpha & Omega Semiconductor Inc.	Rohm Semiconductor	Rohm Semiconductor	STMicroelectronics
FET Type	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel
Vdss (V)	30	30	30	30	30	30
Id @ 25°C (A)	5	5	5	3	4.5	4
Rds On (Max) (mOhm)	59 @ 3A, 10V	59 @ 3A, 10V	52 @ 5A, 10V	75 @ 3A, 10V	35 @ 4.5A, 10V	56 @ 2A, 10V
Qg (Max) (nC)	10 @ 10V	10 @ 10V	18 @ 10V	12 @ 10V	14 @ 5V	6 @ 4.5V
Vgs (Max) (V)	±20	±20	±20	±20	±20	±20
Ciss (Max) (pF)	430 @ 10V	430 @ 10V	840 @ 15V	480 @ 10V	1350 @ 10V	639 @ 25V
Power Dissipation (Max) (W)	1.6	1.6	2	0.6	0.6	1.6
Operating Temperature (°C)	150	150	-55 to 150	150	150	150
Package / Case	SOT-23-6	SOT-23-6	SC-74, SOT-457	SOT-23-6 Thin, TSOT-23-6	SOT-23-6 Thin, TSOT-23-6	SOT-23-6
Product Status	Discontinued at DiGi Electronics	Active	Not For New Designs	Active	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended for Active Designs):

CPH6341-TL-W (onsemi) is the primary substitute for CPH6341-TL-E. This part maintains identical electrical specifications across all critical parameters: 30V Vdss, 5A continuous drain current, 59 mOhm Rds On, 10 nC gate charge, and 1.6W power dissipation. The device is packaged in SOT-23-6 format with identical pin configuration, enabling direct pin-for-pin replacement. CPH6341-TL-W carries Active product status with ROHS3 compliance and MSL 1 rating, ensuring long-term availability and supply chain stability. The primary distinction is packaging format: CPH6341-TL-W is supplied in Tape & Reel (TR) configuration with 17,100 units in stock, compared to the discontinued CPH6341-TL-E.

Tier 2 - Functional Equivalents (For Current-Limited Applications):

STT4P3LLH6 (STMicroelectronics) provides a compatible alternative with 30V Vdss and 4A continuous drain current. While the 4A rating is slightly below the 5A specification of the main part, this device offers superior switching characteristics with 6 nC gate charge (40% lower than CPH6341-TL-E) and 56 mOhm Rds On. The STT4P3LLH6 is housed in SOT-23-6 package with Active product status, ROHS3 compliance, and MSL 1 rating. This substitute is suitable for applications where drain current does not exceed 4A and switching speed optimization is beneficial.

RRQ045P03TR (Rohm Semiconductor) offers 30V Vdss with 4.5A continuous drain current in a SOT-23-6 Thin package. This device features superior on-resistance (35 mOhm @ 4.5A, 10V) compared to the main part, reducing thermal dissipation. However, RRQ045P03TR carries "Not For New Designs" product status and exhibits higher input capacitance (1350 pF @ 10V), which may impact switching performance in high-frequency applications. This substitute is acceptable for legacy design maintenance where supply continuity is prioritized.

Tier 3 - Limited Compatibility (For Evaluation Only):

RRQ030P03TR (Rohm Semiconductor) is rated for 30V Vdss with 3A continuous drain current, below the 5A requirement of CPH6341-TL-E. This part is suitable only for applications with maximum drain current of 3A. The device features 75 mOhm Rds On and 12 nC gate charge in a SOT-23-6 Thin package. RRQ030P03TR maintains Active product status with ROHS3 compliance and MSL 1 rating.

AO6405 (Alpha & Omega Semiconductor Inc.) provides 30V Vdss with 5A continuous drain current and superior on-resistance (52 mOhm @ 5A, 10V). However, this device is packaged in SC-74/SOT-457 format, requiring PCB layout modification for compatibility. AO6405 carries "Not For New Designs" product status and exhibits higher input capacitance (840 pF @ 15V) and gate charge (18 nC @ 10V). This substitute is not recommended for new designs due to product status and package incompatibility.

Frequently Asked Questions (FAQ)

Q1: Can CPH6341-TL-W be used as a direct replacement for CPH6341-TL-E?

Yes. CPH6341-TL-W is a direct pin-for-pin replacement. Both devices share identical electrical specifications (30V Vdss, 5A Id, 59 mOhm Rds On, 10 nC Qg, 1.6W power dissipation) and are packaged in SOT-23-6 format. The only difference is packaging format: CPH6341-TL-W is supplied in Tape & Reel configuration. No circuit modification is required.

Q2: What is the minimum drain current rating acceptable for substitution?

The CPH6341-TL-E is rated for 5A continuous drain current at 25°C. Substitute parts must support this current level or higher to maintain design margin. Parts rated below 5A (such as RRQ030P03TR at 3A) are acceptable only if the application's maximum drain current does not exceed the substitute part's rating. Verify actual circuit current requirements before selecting lower-rated alternatives.

Q3: Are package variations acceptable for substitution?

Package variations require PCB layout evaluation. CPH6341-TL-E uses SOT-23-6 package. Substitutes in SOT-23-6 or SOT-23-6 Thin packages are mechanically compatible with existing PCB footprints. Devices in different packages (such as AO6405 in SC-74/SOT-457) require PCB redesign and are not recommended for direct substitution.

Q4: What is the significance of "Not For New Designs" product status?

"Not For New Designs" indicates that the manufacturer is not actively promoting the part for new applications and may discontinue production. Parts with this status (AO6405, RRQ045P03TR) are acceptable for legacy design maintenance and repair but should not be selected for new product development. For new designs, prioritize parts with Active product status.

Q5: How do on-resistance differences affect thermal performance?

On-resistance (Rds On) directly impacts power dissipation through the relationship P = I²R. Lower Rds On values reduce heat generation. For example, RRQ045P03TR (35 mOhm @ 4.5A) dissipates less heat than CPH6341-TL-E (59 mOhm @ 3A) at equivalent current levels. However, thermal performance also depends on application duty cycle, ambient temperature, and PCB thermal design. Verify that substitute parts' power dissipation ratings do not exceed thermal design limits.

Q6: What is the impact of gate charge differences on circuit performance?

Gate charge (Qg) determines the energy required to switch the FET on and off. Lower gate charge reduces switching losses and enables faster switching transitions. STT4P3LLH6 (6 nC @ 4.5V) has significantly lower gate charge than CPH6341-TL-E (10 nC @ 10V), potentially improving efficiency in switching applications. Higher gate charge (AO6405 at 18 nC @ 10V) increases switching losses and may require gate driver circuit adjustments.

Q7: Are all substitute parts RoHS3 compliant?

Yes. All substitute parts listed (CPH6341-TL-W, AO6405, RRQ030P03TR, RRQ045P03TR, STT4P3LLH6) are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. These certifications ensure compatibility with modern manufacturing processes and environmental regulations.

Q8: Which substitute part offers the best overall compatibility?

CPH6341-TL-W is the optimal substitute, providing identical electrical specifications, matching SOT-23-6 package, and Active product status. This part requires no circuit or PCB modifications and ensures long-term supply availability. For applications where 4A drain current is acceptable, STT4P3LLH6 offers superior switching characteristics with lower gate charge and on-resistance.

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