CPH3240-TL-E Equivalent & Substitute Parts

Part Overview

The CPH3240-TL-E is an NPN bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 1 A maximum collector current. This device is designed for surface mount applications in the SC-96 package configuration. The part is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across critical electrical parameters including voltage rating, current capacity, and frequency response.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	100	V
Current - Collector (Ic) (Max)	1	A
Power - Max	900	mW
Frequency - Transition	120	MHz
Operating Temperature (Max)	150	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the CPH3240-TL-E is determined by the following critical parameters:

Electrical Compatibility Requirements:

Transistor type must be NPN
Voltage - Collector Emitter Breakdown rating must equal or exceed 100 V
Current - Collector (Ic) maximum rating must equal or exceed 1 A
Power dissipation capability must support 900 mW operation
Frequency - Transition must support 120 MHz minimum operation

Physical & Compliance Requirements:

Mounting type must be Surface Mount
RoHS3 compliance required
Moisture Sensitivity Level 1 (Unlimited)
REACH Unaffected status

The substitute parts listed below satisfy these criteria while offering active product status and improved or equivalent performance characteristics.

Parameter Comparison

Parameter	CPH3240-TL-E (Main)	2SC3906KT146R	FMMT494TA	FMMT624TA
Manufacturer	onsemi	Rohm Semiconductor	Diodes Incorporated	Diodes Incorporated
Transistor Type	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	100 V	120 V	120 V	125 V
Current - Collector (Ic) (Max)	1 A	50 mA	1 A	1 A
Power - Max	900 mW	200 mW	500 mW	625 mW
Frequency - Transition	120 MHz	140 MHz	100 MHz	155 MHz
Vce Saturation (Max)	400 mV @ 40mA, 400mA	500 mV @ 1mA, 10mA	300 mV @ 50mA, 500mA	250 mV @ 50mA, 1A
DC Current Gain (hFE) (Min)	140 @ 100mA, 5V	180 @ 2mA, 6V	100 @ 250mA, 10V	300 @ 200mA, 10V
Operating Temperature (Max)	150°C	150°C	150°C	150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-96	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

FMMT624TA (Primary Substitute)

The FMMT624TA from Diodes Incorporated is the optimal substitute for the CPH3240-TL-E. This device maintains full electrical compatibility with 1 A collector current capacity, exceeds the voltage requirement at 125 V, and provides superior power dissipation at 625 mW. The transition frequency of 155 MHz exceeds the 120 MHz requirement. The part is active in production status, ROHS3 compliant, and available in high inventory quantities (65,200 pcs). Package compatibility requires PCB layout adjustment from SC-96 to SOT-23-3.

FMMT494TA (Secondary Substitute)

The FMMT494TA from Diodes Incorporated provides full 1 A current capacity and 120 V voltage rating. Power dissipation at 500 mW is lower than the original specification but sufficient for most applications. Transition frequency of 100 MHz is below the original 120 MHz specification. This part is active in production, ROHS3 compliant, and available in moderate inventory (3,649 pcs). Package compatibility requires PCB layout adjustment from SC-96 to SOT-23-3.

2SC3906KT146R (Limited Compatibility)

The 2SC3906KT146R from Rohm Semiconductor does not meet the 1 A current requirement, with a maximum collector current of only 50 mA. This part is not suitable for applications requiring full 1 A operation. The part is active in production and ROHS3 compliant but should not be selected for direct substitution of the CPH3240-TL-E.

Frequently Asked Questions (FAQ)

Q: Can the FMMT624TA directly replace the CPH3240-TL-E without circuit modification?

A: Electrical substitution is direct. The FMMT624TA meets or exceeds all critical electrical parameters. Physical substitution requires PCB layout modification due to package change from SC-96 to SOT-23-3. Pin configuration compatibility must be verified against the specific application schematic.

Q: Why is the 2SC3906KT146R listed as a substitute if it only supports 50 mA?

A: The 2SC3906KT146R is listed in the original CPH3240-TL-E substitute documentation but does not meet the 1 A current requirement. This part is suitable only for applications requiring reduced current levels and should not be selected for direct replacement in designs requiring full 1 A operation.

Q: What is the impact of the package change from SC-96 to SOT-23-3?

A: The SC-96 and SOT-23-3 packages have different physical dimensions and pin layouts. PCB footprint redesign is required. Pin-to-pin electrical function remains equivalent (collector, base, emitter). Thermal performance may differ due to package geometry variations.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The FMMT624TA, FMMT494TA, and 2SC3906KT146R are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status, matching the original part's compliance profile.

Q: Which substitute provides the best thermal performance?

A: The FMMT624TA provides the highest power dissipation rating at 625 mW, compared to 500 mW for the FMMT494TA and 200 mW for the 2SC3906KT146R. For applications approaching the 900 mW limit of the original part, the FMMT624TA offers the best thermal margin.

Q: Can the FMMT494TA be used in high-frequency applications?

A: The FMMT494TA has a transition frequency of 100 MHz, which is below the original CPH3240-TL-E specification of 120 MHz. Applications requiring operation at or above 120 MHz should use the FMMT624TA (155 MHz) or verify that 100 MHz operation is acceptable for the specific circuit design.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message