CPH3145-TL-E Equivalent & Substitute Parts

Part Overview

The CPH3145-TL-E is a PNP Bipolar Junction Transistor (BJT) manufactured by onsemi, rated for 50V collector-emitter breakdown voltage and 2A maximum collector current. This surface mount device is designed for general-purpose switching and amplification applications in the 3-CPH package configuration. The part is classified as obsolete, making equivalent and substitute components necessary for ongoing design support and production continuity. Active alternative parts with compatible electrical and mechanical specifications are available from multiple manufacturers including onsemi, Rohm Semiconductor, and Nexperia USA Inc.

Key Parameters

Parameter	CPH3145-TL-E Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	50	V
Current - Collector (Ic) (Max)	2	A
Power - Max	900	mW
Frequency - Transition	420	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 100mA, 2V	—
Vce Saturation (Max) @ Ib, Ic	330mV @ 50mA, 1A	—
Current - Collector Cutoff (Max)	1µA (ICBO)	—
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-96	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the CPH3145-TL-E is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: PNP polarity
Voltage - Collector Emitter Breakdown (Max): 50V or higher
Current - Collector (Ic) (Max): 2A or higher
Power - Max: 900mW or higher
DC Current Gain (hFE): minimum 200 at specified test conditions
Operating Temperature: 150°C or higher
RoHS3 Compliance and MSL Level 1 rating

Secondary Compatibility Factors:

Surface Mount mounting type
Package compatibility: SC-96 or equivalent SOT-23-3 footprints
Frequency - Transition: 420MHz or higher preferred for high-speed applications

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (2A Rating): Parts meeting or exceeding the 2A collector current specification with 50V+ breakdown voltage and 900mW+ power dissipation capability.

Category B - Reduced Current Equivalents (Below 2A Rating): Parts with collector current ratings below 2A, suitable only for applications where maximum current requirements do not exceed the substitute part's rating.

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce Breakdown (Max)	Power (Max)	Frequency (Transition)	hFE (Min)	Package	Product Status
CPH3145-TL-E	onsemi	2 A	50 V	900 mW	420 MHz	200 @ 100mA, 2V	SC-96	Obsolete
PBSS5350T,215	Nexperia USA Inc.	2 A	50 V	540 mW	100 MHz	200 @ 1A, 2V	TO-236-3, SC-59, SOT-23-3	Active
NSS60200LT1G	onsemi	2 A	60 V	460 mW	100 MHz	150 @ 500mA, 2V	TO-236-3, SC-59, SOT-23-3	Active
2SAR543RTL	Rohm Semiconductor	3 A	50 V	1 W	300 MHz	180 @ 100mA, 3V	SC-96	Active
CPH3116-TL-E	onsemi	1 A	50 V	900 mW	420 MHz	200 @ 100mA, 2V	TO-236-3, SC-59, SOT-23-3	Active
2SA1037AKT146R	Rohm Semiconductor	150 mA	50 V	200 mW	140 MHz	180 @ 1mA, 6V	TO-236-3, SC-59, SOT-23-3	Active
2SA1037AKT146Q	Rohm Semiconductor	150 mA	50 V	200 mW	140 MHz	120 @ 1mA, 6V	TO-236-3, SC-59, SOT-23-3	Active

Engineering Selection Recommendations

For Direct Replacement (2A Applications):

The PBSS5350T,215 (Nexperia USA Inc.) provides the closest electrical match with 2A collector current and 50V breakdown voltage. This part is active in production status and carries ROHS3 compliance with MSL Level 1 rating, matching the original CPH3145-TL-E specifications. Package compatibility exists through TO-236-3/SOT-23-3 footprints. Note that power dissipation is reduced to 540mW compared to the original 900mW specification.

The NSS60200LT1G (onsemi) offers 2A current capability with enhanced 60V breakdown voltage rating, providing additional design margin. This part is active and fully compliant with RoHS3 and MSL Level 1 requirements. Power dissipation is 460mW, lower than the original specification.

The 2SAR543RTL (Rohm Semiconductor) exceeds the original specification with 3A collector current capability, 50V breakdown voltage, and 1W power dissipation. This part maintains the SC-96 package footprint of the original CPH3145-TL-E and is active in production. It provides the highest power handling capability among available substitutes.

For Reduced Current Applications (Below 2A):

The CPH3116-TL-E (onsemi) is suitable for applications requiring maximum 1A collector current. This part maintains identical electrical characteristics to the original except for the 1A current limit, and is active in production with full compliance certifications.

The 2SA1037AKT146R and 2SA1037AKT146Q (Rohm Semiconductor) are appropriate for applications requiring maximum 150mA collector current. Both parts are active and fully compliant. These parts are suitable only for low-current signal switching and amplification circuits.

Compliance and Certification:

All recommended substitute parts carry ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity ratings, matching the original part's environmental specifications. All parts are classified as active products with ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the PBSS5350T,215 directly replace the CPH3145-TL-E in all applications?

A: The PBSS5350T,215 meets the electrical requirements for 2A collector current and 50V breakdown voltage. However, power dissipation is reduced from 900mW to 540mW. Applications requiring sustained power dissipation above 540mW require thermal analysis or selection of an alternative part such as the 2SAR543RTL.

Q: What is the difference between the 2SA1037AKT146R and 2SA1037AKT146Q?

A: Both parts are identical except for DC Current Gain (hFE) specifications. The 2SA1037AKT146R has minimum hFE of 180 at 1mA/6V, while the 2SA1037AKT146Q has minimum hFE of 120 at the same test conditions. Both are limited to 150mA maximum collector current and are unsuitable for applications requiring 2A operation.

Q: Why does the NSS60200LT1G have lower power dissipation than the original CPH3145-TL-E?

A: The NSS60200LT1G is rated for 460mW maximum power dissipation compared to the original 900mW specification. This reflects different thermal design characteristics and package thermal resistance. Applications with high continuous power dissipation requirements should select the 2SAR543RTL (1W rating) or verify thermal performance through detailed analysis.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 Compliant certification and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original CPH3145-TL-E environmental specifications.

Q: What is the significance of the SC-96 package in the 2SAR543RTL?

A: The 2SAR543RTL maintains the SC-96 package footprint of the original CPH3145-TL-E, enabling direct PCB layout compatibility without redesign. Other substitute parts use TO-236-3/SOT-23-3 packages, which may require PCB layout modifications depending on the original design.

Q: Can the CPH3116-TL-E be used in place of the CPH3145-TL-E?

A: The CPH3116-TL-E is suitable only for applications where maximum collector current does not exceed 1A. It maintains identical electrical characteristics to the original except for the reduced current rating. Applications requiring 2A operation cannot use this substitute.

Q: What is the frequency difference between the CPH3145-TL-E and substitute parts?

A: The original CPH3145-TL-E has 420MHz transition frequency. The PBSS5350T,215 and NSS60200LT1G are rated for 100MHz, while the 2SAR543RTL is rated for 300MHz. Applications requiring high-frequency operation above 300MHz should verify compatibility with the substitute part's frequency specification.

Q: Are there package compatibility issues when substituting parts?

A: The 2SAR543RTL maintains SC-96 package compatibility with the original. The PBSS5350T,215, NSS60200LT1G, CPH3116-TL-E, and 2SA1037 series use TO-236-3/SOT-23-3 packages. PCB layout modifications may be required for these substitutes depending on the original design footprint.

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