CPH3109-TL-E Equivalent & Substitute Parts

Part Overview

The CPH3109-TL-E is a PNP bipolar junction transistor manufactured by onsemi, rated for 30V collector-emitter breakdown voltage and 3A maximum collector current. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity. The part is housed in a 3-CPH surface mount package and complies with RoHS3 and REACH regulations.

Key Parameters

Parameter	Value
Transistor Type	PNP
Voltage - Collector Emitter Breakdown (Max)	30 V
Current - Collector (Ic) (Max)	3 A
Power - Max	900 mW
Frequency - Transition	380 MHz
Vce Saturation (Max)	230 mV @ 30 mA, 1.5 A
DC Current Gain (hFE) (Min)	200 @ 500 mA, 2 V
Operating Temperature (Max)	150°C (TJ)
Mounting Type	Surface Mount
Package / Case	SC-96 (3-CPH)

Substitute Part Grouping Explanation

Substitution of the CPH3109-TL-E is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor polarity: PNP
Voltage rating: Minimum 30V collector-emitter breakdown voltage
Current rating: Minimum 3A maximum collector current
Power dissipation: Minimum 900 mW
Mounting type: Surface mount
Package compatibility: SC-96 or equivalent form factor

Secondary Compatibility Factors:

Transition frequency: 380 MHz or higher preferred for frequency-dependent applications
Saturation voltage characteristics
DC current gain (hFE) specifications
Operating temperature range

Substitute parts are grouped into two categories based on electrical performance alignment:

Category A - Direct Electrical Equivalents (Matched Current and Voltage Ratings): The 2SB1708TL maintains identical 30V/3A ratings with SC-96 packaging, providing the closest functional replacement.

Category B - Functional Substitutes (Reduced Current or Power Ratings): The NSS60200LT1G and 2SA1036KT146Q/2SA1036KT146R provide PNP functionality with reduced current or power specifications, suitable for applications where the full 3A rating is not required.

Parameter Comparison

Parameter	CPH3109-TL-E	2SB1708TL	NSS60200LT1G	2SA1036KT146Q	2SA1036KT146R
Manufacturer	onsemi	Rohm Semiconductor	onsemi	Rohm Semiconductor	Rohm Semiconductor
Transistor Type	PNP	PNP	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V	60 V	32 V	32 V
Current - Collector (Ic) (Max)	3 A	3 A	2 A	500 mA	500 mA
Power - Max	900 mW	500 mW	460 mW	200 mW	200 mW
Frequency - Transition	380 MHz	200 MHz	100 MHz	200 MHz	200 MHz
Vce Saturation (Max)	230 mV @ 30 mA, 1.5 A	250 mV @ 30 mA, 1.5 A	220 mV @ 200 mA, 2 A	600 mV @ 30 mA, 300 mA	600 mV @ 30 mA, 300 mA
DC Current Gain (hFE) (Min)	200 @ 500 mA, 2 V	270 @ 200 mA, 2 V	150 @ 500 mA, 2 V	120 @ 100 mA, 3 V	120 @ 100 mA, 3 V
Operating Temperature (Max)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-96 (3-CPH)	SC-96 (TSMT3)	TO-236-3 (SOT-23-3)	TO-236-3 (SMT3)	TO-236-3 (SMT3)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: 2SB1708TL

The 2SB1708TL is the preferred substitute for the CPH3109-TL-E. This Rohm Semiconductor device maintains electrical equivalence in voltage (30V) and current (3A) ratings, ensuring direct functional replacement without circuit redesign. Both devices share the SC-96 package form factor, facilitating mechanical compatibility. The 2SB1708TL is classified as active product status, ensuring long-term availability and supply chain continuity. All regulatory compliance requirements (RoHS3, REACH, MSL-1) are met. The primary trade-off is reduced power dissipation (500 mW versus 900 mW) and transition frequency (200 MHz versus 380 MHz), which may require thermal management review in high-power applications.

Secondary Recommendation: NSS60200LT1G

The NSS60200LT1G is suitable for applications where collector current requirements do not exceed 2A. This onsemi device provides higher voltage rating (60V) and active product status. The package transitions to SOT-23-3 (TO-236-3), requiring PCB layout modification. This substitute is appropriate for designs with reduced current demands and higher voltage margin requirements.

Tertiary Recommendation: 2SA1036KT146Q or 2SA1036KT146R

These Rohm Semiconductor devices are applicable only to circuits requiring maximum collector current of 500 mA or less. Both variants are electrically identical and available in active product status. The SMT3 package (TO-236-3) requires PCB redesign. These substitutes are suitable for low-current signal amplification and switching applications.

Frequently Asked Questions (FAQ)

Q: Can the 2SB1708TL directly replace the CPH3109-TL-E without circuit modification?

A: The 2SB1708TL provides electrical equivalence in voltage and current ratings. However, the reduced power dissipation (500 mW versus 900 mW) requires thermal analysis. If the original design operates near the 900 mW limit, thermal management modifications may be necessary. The SC-96 package compatibility permits direct PCB substitution.

Q: What is the primary limitation of the NSS60200LT1G as a substitute?

A: The NSS60200LT1G is limited to 2A maximum collector current, compared to the CPH3109-TL-E rating of 3A. Applications requiring sustained currents above 2A cannot use this substitute. Additionally, the SOT-23-3 package differs from the SC-96, necessitating PCB layout changes.

Q: Are the 2SA1036KT146Q and 2SA1036KT146R interchangeable with each other?

A: Yes. Both devices are electrically identical PNP transistors with 32V/500mA ratings. The designations Q and R represent different manufacturing batches or tape reel configurations. Selection between them is based on packaging and inventory availability rather than electrical performance.

Q: Why is the CPH3109-TL-E classified as obsolete?

A: The obsolete status indicates that onsemi has discontinued production and support for this device. Substitute parts ensure design continuity and procurement availability for existing applications and new designs requiring equivalent functionality.

Q: Can the 2SA1036 series be used in high-frequency applications?

A: The 2SA1036KT146Q and 2SA1036KT146R have transition frequency of 200 MHz, compared to the CPH3109-TL-E at 380 MHz. These devices are suitable for applications up to approximately 200 MHz. Designs requiring operation above 200 MHz should use the 2SB1708TL (200 MHz) or evaluate alternative high-frequency PNP transistors.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed are RoHS3 compliant, REACH unaffected, and classified as MSL-1 (unlimited moisture sensitivity level). These certifications match the original CPH3109-TL-E specifications, ensuring regulatory compatibility in existing applications.

Q: Does package size affect electrical performance?

A: Package size (SC-96 versus SOT-23-3) does not affect electrical performance characteristics. However, package selection impacts thermal dissipation capability, PCB layout requirements, and mechanical integration. The SC-96 package provides superior thermal performance compared to SOT-23-3 due to larger surface area.

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