RN2102,LF(CT Pre-Biased PNP Transistor Equivalent & Substitute Parts

Part Overview

The RN2102,LF(CT is a pre-biased PNP bipolar junction transistor manufactured by Toshiba Semiconductor and Storage. This surface mount device operates at 50 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and is designed for general-purpose switching and amplification applications. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from multiple qualified sources. The parts listed below maintain electrical and mechanical compatibility within specified parameter ranges.

Substiute Parts

RN2102,LF(CT

Toshiba Semiconductor and StorageIn Stock: 815RN2102,LF(CT Datasheet

Current PartRFQ

DTA114EET1G

onsemiIn Stock: 32244DTA114EET1G Datasheet

SimilarRFQ

DTA114EETL

Rohm SemiconductorIn Stock: 155436DTA114EETL Datasheet

SimilarRFQ

DTA115EETL

Rohm SemiconductorIn Stock: 16243DTA115EETL Datasheet

SimilarRFQ

DTA123EETL

Rohm SemiconductorIn Stock: 3945DTA123EETL Datasheet

SimilarRFQ

DTA144EETL

Rohm SemiconductorIn Stock: 185119DTA144EETL Datasheet

SimilarRFQ

DTB543EETL

Rohm SemiconductorIn Stock: 35410DTB543EETL Datasheet

SimilarRFQ

PDTA114EM,315

Nexperia USA Inc.In Stock: 7426PDTA114EM,315 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN2102,LF(CT is determined by the following critical parameters:

Mandatory Matching Parameters:

• Transistor Type: PNP - Pre-Biased
• Voltage - Collector Emitter Breakdown (Max): 50 V minimum
• Current - Collector (Ic) (Max): 100 mA minimum
• Resistor - Base (R1): 10 kOhms
• Resistor - Emitter Base (R2): 10 kOhms
• Package / Case: SC-75, SOT-416 compatible
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Flexible Parameters (within acceptable ranges):

• DC Current Gain (hFE): May vary based on measurement conditions
• Vce Saturation: Acceptable within specified test conditions
• Frequency - Transition: 200 MHz or higher
• Power - Max: 100 mW or higher
• Current - Collector Cutoff: 500 nA or lower

Parts that meet all mandatory parameters are classified as direct substitutes. Parts with different base resistor values (R1, R2) or collector current ratings below 100 mA are classified as functional alternatives for specific application contexts only.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (SC-75, SOT-416 Package):

The following parts maintain identical base and emitter resistor values (10 kOhms each) and support the full 100 mA collector current specification:

• DTA114EET1G (onsemi): Meets all mandatory parameters. Higher power rating (200 mW) provides additional thermal margin. SC-75, SOT-416 package. ROHS3 compliant. Inventory availability: 32,200 pieces.

• DTA114EETL (Rohm Semiconductor): Meets all mandatory parameters. Transition frequency of 250 MHz exceeds minimum requirement. SC-75, SOT-416 package. ROHS3 compliant. Inventory availability: 155,400 pieces.

• DTA123EETL (Rohm Semiconductor): Meets voltage and current specifications. Base and emitter resistors are 2.2 kOhms (different from primary part). Lower DC current gain (20 @ 20mA, 5V). SC-75, SOT-416 package. ROHS3 compliant. Inventory availability: 3,900 pieces. Use only when application circuit accommodates lower gain characteristics.

Functional Alternative (Different Package):

• PDTA114EM,315 (Nexperia USA Inc.): Meets all mandatory electrical parameters. Different package format (SC-101, SOT-883) requires PCB layout modification. Automotive grade with AEC-Q100 qualification. Lower saturation voltage (150 mV) and higher power rating (250 mW). ROHS3 compliant. Inventory availability: 7,394 pieces. Package change necessitates design review.

Not Recommended as Direct Substitute:

• DTA144EETL (Rohm Semiconductor): Maximum collector current is 30 mA, below the 100 mA requirement. Base and emitter resistors are 47 kOhms, differing from the primary part specification. Suitable only for applications with reduced current requirements.

All substitute parts listed maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, consistent with the primary part specification.

Frequently Asked Questions (FAQ)

Q: Can DTA114EET1G be used as a direct replacement for RN2102,LF(CT?

A: Yes. DTA114EET1G maintains identical base resistor (10 kOhms), emitter resistor (10 kOhms), collector current rating (100 mA), and collector-emitter breakdown voltage (50 V). Both use SC-75, SOT-416 package. Both are ROHS3 compliant with MSL 1 rating. The higher power rating (200 mW vs. 100 mW) provides additional design margin.

Q: What is the difference between DTA114EETL and DTA114EET1G?

A: Both parts share identical electrical specifications (10 kOhms base/emitter resistors, 100 mA collector current, 50 V breakdown voltage). DTA114EET1G is manufactured by onsemi with 200 mW power rating. DTA114EETL is manufactured by Rohm Semiconductor with 150 mW power rating and 250 MHz transition frequency. Both use SC-75, SOT-416 package and are ROHS3 compliant.

Q: Why is DTA144EETL listed as a substitute if it has only 30 mA collector current?

A: DTA144EETL is listed in the provided substitute list but is not recommended as a direct replacement for the RN2102,LF(CT due to insufficient collector current rating (30 mA vs. 100 mA required). It is suitable only for applications with reduced current requirements and different base/emitter resistor values (47 kOhms vs. 10 kOhms).

Q: Can PDTA114EM,315 be used without PCB modifications?

A: No. PDTA114EM,315 uses SC-101, SOT-883 package, which differs from the RN2102,LF(CT SC-75, SOT-416 package. PCB footprint and layout modifications are required. However, electrical specifications are compatible (10 kOhms base/emitter resistors, 100 mA collector current, 50 V breakdown voltage). This part is automotive-qualified (AEC-Q100).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (DTA114EET1G, DTA114EETL, DTA123EETL, DTA144EETL, PDTA114EM,315) are ROHS3 compliant, matching the primary part specification.

Q: What does "Pre-Biased" mean in the transistor designation?

A: Pre-biased transistors integrate internal base and emitter resistors within the same package. These resistors establish a bias network that simplifies circuit design by eliminating the need for external biasing resistors. The RN2102,LF(CT contains 10 kOhm base and emitter resistors integrated into the SC-75, SOT-416 package.

Q: Can I substitute DTA123EETL for RN2102,LF(CT in all applications?

A: DTA123EETL has different base and emitter resistor values (2.2 kOhms vs. 10 kOhms) and lower DC current gain (20 @ 20mA, 5V vs. 50 @ 10mA, 5V). These differences affect circuit biasing and switching characteristics. Substitution requires circuit analysis and validation to confirm compatibility with application requirements.

Q: What is the significance of the transition frequency specification?

A: Transition frequency (fT) indicates the maximum frequency at which the transistor maintains useful gain. RN2102,LF(CT specifies 200 MHz. DTA114EETL and DTA123EETL specify 250 MHz, providing higher-frequency capability. For applications operating below 200 MHz, all parts are functionally equivalent in this parameter.

Q: Are there package compatibility considerations between SC-75 and SOT-416?

A: SC-75 and SOT-416 are equivalent designations for the same physical package format. Parts specified with either designation are mechanically and electrically compatible on the same PCB footprint.