RN1106ACT(TPL3) Equivalent & Substitute Parts

Part Overview

The RN1106ACT(TPL3) is a pre-biased NPN bipolar junction transistor (BJT) manufactured by Toshiba Semiconductor and Storage, designed for surface mount applications in the CST3 package. This component integrates internal base and emitter-base resistors, enabling simplified circuit design with reduced component count. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

RN1106ACT(TPL3)

Toshiba Semiconductor and StorageIn Stock: 944RN1106ACT(TPL3) Datasheet

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RN1106MFV,L3F

Toshiba Semiconductor and StorageIn Stock: 53999RN1106MFV,L3F Datasheet

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PDTC143TM,315

NXP SemiconductorsIn Stock: 30473PDTC143TM,315 Datasheet

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PDTC143TMB,315

NXP USA Inc.In Stock: 104918PDTC143TMB,315 Datasheet

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PDTC143ZM,315

Nexperia USA Inc.In Stock: 1807PDTC143ZM,315 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN1106ACT(TPL3) is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Transistor type: NPN pre-biased configuration
• Maximum collector current: 80 mA minimum requirement
• Collector-emitter breakdown voltage: 50 V minimum
• Base resistor (R1): 4.7 kOhms
• Emitter-base resistor (R2): 47 kOhms
• DC current gain (hFE): 80 minimum at specified conditions
• Vce saturation: performance within acceptable operating range
• Collector cutoff current: leakage specification compliance

Mechanical Compatibility Criteria:

• Surface mount mounting type
• Package compatibility: SC-101 or SOT-883 footprint
• Moisture sensitivity level: MSL 1 or equivalent

Substitute parts must satisfy all electrical parameters at or above the main part specifications and maintain mechanical compatibility with the original PCB design. Parts listed below meet these criteria with active product status or documented compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

RN1106MFV,L3F (Toshiba)

This substitute maintains the same manufacturer lineage as the obsolete RN1106ACT(TPL3) and shares identical base resistor and emitter-base resistor values. The part is active with ROHS3 compliance and REACH unaffected status. The maximum collector current is increased to 100 mA, and power dissipation is rated at 150 mW, both exceeding the original specification. The package differs (SOT-723 versus CST3), requiring PCB layout verification for footprint compatibility. This option is suitable for applications where the smaller SOT-723 package can be accommodated.

PDTC143TMB,315 (NXP USA Inc.)

This NXP pre-biased transistor meets all critical electrical parameters with 100 mA maximum collector current and 50 V breakdown voltage. The base resistor matches at 4.7 kOhms. The DC current gain is higher (200 @ 1mA, 5V), and Vce saturation is improved at 100 mV. The package designation SC-101, SOT-883 provides direct footprint compatibility with the original part. No RoHS or REACH compliance information is provided in the available data.

PDTC143ZM,315 (Nexperia USA Inc.)

This substitute provides the most comprehensive compliance documentation, including ROHS3 compliance, REACH unaffected status, and AEC-Q100 automotive qualification. Electrical parameters match the original specification closely: 100 mA collector current, 50 V breakdown voltage, 4.7 kOhms base resistor, and 47 kOhms emitter-base resistor. The package is SC-101, SOT-883, providing direct mechanical compatibility. The DC current gain is 100 @ 10mA, 5V, and Vce saturation is 100 mV. This part is recommended for applications requiring automotive-grade reliability and regulatory compliance.

PDTC143TM,315 (NXP Semiconductors)

Limited technical data is available for this part. It is confirmed as an active pre-biased transistor with MSL 1 rating and REACH unaffected status. Detailed electrical specifications are not provided in the available documentation. This part should be selected only when other alternatives are unavailable and detailed datasheet review is performed.

Frequently Asked Questions (FAQ)

Q: Can the RN1106MFV,L3F be used as a direct replacement for the RN1106ACT(TPL3)?

A: The RN1106MFV,L3F shares identical electrical specifications (base resistor, emitter-base resistor, current gain, and breakdown voltage) and is from the same manufacturer. However, the package differs: RN1106MFV,L3F uses SOT-723 while the original uses CST3. PCB footprint compatibility must be verified before substitution. If the SOT-723 footprint can be accommodated, this is a direct electrical equivalent.

Q: What is the primary difference between the Toshiba and NXP substitute options?

A: The Toshiba RN1106MFV,L3F maintains manufacturer continuity and identical resistor values but uses a different package (SOT-723). The NXP options (PDTC143 series) use the SC-101, SOT-883 package, which matches the original footprint. The PDTC143ZM,315 offers additional automotive qualification (AEC-Q100) and compliance certifications.

Q: Is the PDTC143ZM,315 suitable for automotive applications?

A: Yes. The PDTC143ZM,315 carries AEC-Q100 qualification and is designated as automotive grade. It also holds ROHS3 compliance and REACH unaffected status, making it suitable for automotive and regulated industrial applications.

Q: How do the Vce saturation specifications differ among substitutes?

A: The original RN1106ACT(TPL3) specifies 150 mV Vce saturation at 250 µA base current and 5 mA collector current. The PDTC143TMB,315 and PDTC143ZM,315 both specify 100 mV under the same conditions, representing improved saturation performance. The RN1106MFV,L3F specifies 300 mV at higher base current (500 µA) and collector current (5 mA), indicating different operating characteristics.

Q: Are all substitute parts MSL 1 rated?

A: Yes. All substitute parts listed carry MSL 1 (Unlimited) moisture sensitivity level rating, matching the original part specification. This indicates no special moisture control measures are required during storage or handling.

Q: What package considerations apply when selecting a substitute?

A: The original RN1106ACT(TPL3) uses the CST3 package. The RN1106MFV,L3F uses SOT-723, while PDTC143TMB,315 and PDTC143ZM,315 use SC-101, SOT-883. Package selection depends on available PCB footprint space and design constraints. The SC-101, SOT-883 package provides direct mechanical compatibility with the original design.

Q: Can the PDTC143TM,315 be used without detailed specification review?

A: No. The PDTC143TM,315 has limited technical data available. Full datasheet review is required to confirm electrical parameter compatibility before selection. This part should be considered only when other alternatives are unavailable.

Q: What is the significance of the higher DC current gain in the PDTC143TMB,315?

A: The PDTC143TMB,315 specifies DC current gain of 200 @ 1mA, 5V, compared to 80 @ 10mA, 5V for the original part. This indicates stronger transistor action at lower base currents, which may affect circuit biasing behavior. Circuit simulation or testing is necessary to confirm compatibility in the specific application.