PDTC124TMB,315 Equivalent & Substitute Parts

Part Overview

The PDTC124TMB,315 is a pre-biased NPN bipolar junction transistor manufactured by Nexperia USA Inc. in a 3-pin DFN surface mount package. This component is designed for general-purpose switching and amplification applications requiring integrated base bias resistors. The part is Active in product status and carries automotive-grade qualification under AEC-Q100 standards. Substitute parts are identified when original inventory is unavailable, when packaging format changes are required, or when alternative supplier sourcing is necessary while maintaining functional equivalence within specified electrical parameters.

Substiute Parts

PDTC124TMB,315

Nexperia USA Inc.In Stock: 873PDTC124TMB,315 Datasheet

Current PartRFQ

RN1112ACT(TPL3)

Toshiba Semiconductor and StorageIn Stock: 10784RN1112ACT(TPL3) Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PDTC124TMB,315 is permissible with the RN1112ACT(TPL3) based on the following electrical and mechanical equivalence criteria:

Matching Parameters:

• Transistor Type: Both are NPN pre-biased configurations
• Voltage - Collector Emitter Breakdown: Both rated at 50 V maximum
• Resistor - Base (R1): Both incorporate 22 kOhms integrated base resistor
• Mounting Type: Both are surface mount devices
• RoHS Compliance: Both meet environmental regulatory requirements
• Moisture Sensitivity Level: Both rated MSL 1 (Unlimited)
• Product Status: Both are Active components

Allowable Variations:

• Current - Collector (Ic) (Max): PDTC124TMB,315 at 100 mA; RN1112ACT(TPL3) at 80 mA. The substitute operates within a reduced current envelope, suitable for applications not requiring the full 100 mA specification.
• Power - Max: PDTC124TMB,315 at 250 mW; RN1112ACT(TPL3) at 100 mW. The substitute has lower power dissipation capability.
• Package / Case: PDTC124TMB,315 uses 3-XFDFN; RN1112ACT(TPL3) uses SC-101/SOT-883. Physical footprints differ; PCB layout modification is required.
• Packaging Format: PDTC124TMB,315 supplied in Tape & Reel (TR); RN1112ACT(TPL3) supplied in Cut Tape (CT).
• DC Current Gain (hFE): PDTC124TMB,315 minimum 100 @ 1mA, 5V; RN1112ACT(TPL3) minimum 120 @ 1mA, 5V. The substitute exhibits higher current gain.
• Vce Saturation: PDTC124TMB,315 at 150mV @ 500µA, 10mA; RN1112ACT(TPL3) at 150mV @ 250µA, 5mA. Saturation voltage is identical; saturation conditions differ.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (PDTC124TMB,315): The PDTC124TMB,315 is the specified component for applications requiring the full rated performance envelope: 100 mA collector current, 250 mW power dissipation, and 230 MHz transition frequency. This part carries Active product status, AEC-Q100 automotive qualification, and ROHS3 compliance, making it suitable for automotive and industrial applications with stringent reliability requirements.

Substitute Selection (RN1112ACT(TPL3)): The RN1112ACT(TPL3) is functionally equivalent for applications where collector current does not exceed 80 mA and power dissipation remains below 100 mW. This substitute maintains the critical electrical parameters: 50 V breakdown voltage, 22 kOhms base resistor, and identical saturation voltage. The substitute is Active in product status and RoHS compliant. However, the substitute does not carry specified automotive qualification or AEC-Q100 certification. Selection of the substitute requires confirmation that the application does not mandate automotive-grade components or AEC-Q100 qualification. The different package format (SC-101/SOT-883 versus 3-XFDFN) necessitates PCB layout modification and re-qualification of the assembly.

Frequently Asked Questions (FAQ)

Q: Can the RN1112ACT(TPL3) directly replace the PDTC124TMB,315 on an existing PCB?

A: No. The packages are physically different. The PDTC124TMB,315 uses a 3-XFDFN package (DFN1006B-3), while the RN1112ACT(TPL3) uses an SC-101/SOT-883 package (CST3). PCB footprint redesign and component placement modification are required. The devices cannot be interchanged without layout changes.

Q: What is the maximum collector current for the substitute part?

A: The RN1112ACT(TPL3) has a maximum collector current rating of 80 mA, compared to 100 mA for the PDTC124TMB,315. Applications requiring collector currents above 80 mA must use the primary part or identify an alternative substitute rated for higher current.

Q: Are both parts suitable for automotive applications?

A: The PDTC124TMB,315 carries automotive-grade designation and AEC-Q100 qualification. The RN1112ACT(TPL3) does not specify automotive qualification or AEC-Q100 certification in the provided data. Automotive applications requiring these qualifications must use the PDTC124TMB,315.

Q: What is the difference in power dissipation capability?

A: The PDTC124TMB,315 is rated for 250 mW maximum power dissipation. The RN1112ACT(TPL3) is rated for 100 mW maximum power dissipation. Applications dissipating power between 100 mW and 250 mW require the primary part.

Q: Do both parts have the same base resistor value?

A: Yes. Both the PDTC124TMB,315 and RN1112ACT(TPL3) incorporate a 22 kOhms integrated base resistor (R1). This parameter is identical between the two parts.

Q: What is the saturation voltage for each part?

A: Both parts specify a maximum saturation voltage of 150 mV. However, the test conditions differ: the PDTC124TMB,315 is tested at 500 µA base current and 10 mA collector current, while the RN1112ACT(TPL3) is tested at 250 µA base current and 5 mA collector current. The saturation voltage specification is equivalent for practical switching applications.

Q: What packaging formats are available?

A: The PDTC124TMB,315 is supplied in Tape & Reel (TR) format. The RN1112ACT(TPL3) is supplied in Cut Tape (CT) format. These packaging formats affect handling, storage, and automated assembly processes but do not affect component electrical performance.

Q: Are both parts RoHS compliant?

A: Yes. The PDTC124TMB,315 is ROHS3 compliant. The RN1112ACT(TPL3) is RoHS compliant. ROHS3 is a subset of the broader RoHS standard, so both parts meet environmental regulatory requirements.

Q: What is the moisture sensitivity level for these parts?

A: Both the PDTC124TMB,315 and RN1112ACT(TPL3) are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage or handling.

Q: Can the substitute part handle the same transition frequency as the primary part?

A: The PDTC124TMB,315 specifies a transition frequency of 230 MHz. The RN1112ACT(TPL3) does not provide a transition frequency specification in the available data. Applications requiring confirmed high-frequency performance at 230 MHz should use the primary part.