PEMB4,115 Pre-Biased Dual PNP Transistor Equivalent & Substitute Parts

Part Overview

The PEMB4,115 is a pre-biased dual PNP bipolar junction transistor (BJT) manufactured by Nexperia USA Inc. in SOT-666 surface mount packaging. This component integrates two PNP transistors with internal base bias resistors, designed for switching and amplification applications requiring 50V collector-emitter breakdown voltage and 100mA maximum collector current. The PEMB4,115 is classified as obsolete, necessitating identification of functionally equivalent active alternatives for new designs and ongoing production requirements.

Substiute Parts

PEMB4,115

Nexperia USA Inc.In Stock: 962PEMB4,115 Datasheet

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EMB4T2R

Rohm SemiconductorIn Stock: 8162EMB4T2R Datasheet

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NSBA114TDXV6T1G

onsemiIn Stock: 1006NSBA114TDXV6T1G Datasheet

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RN2911FE(TE85L,F)

Toshiba Semiconductor and StorageIn Stock: 4657RN2911FE(TE85L,F) Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PEMB4,115 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Transistor configuration: 2 PNP - Pre-Biased (Dual)
• Maximum collector current: 100mA
• Maximum collector-emitter breakdown voltage: 50V
• Base resistor value (R1): 10kOhms
• Surface mount technology
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Acceptable Variation Parameters:

• Power dissipation rating (300mW minimum not required; lower ratings acceptable if thermal design permits)
• DC current gain (hFE) values (variation acceptable within switching application requirements)
• Vce saturation characteristics (variation acceptable within switching application requirements)
• Package variant (SOT-563 or SOT-666 acceptable)
• Transition frequency (presence or absence acceptable)

All substitute parts listed maintain identical core electrical specifications for the dual PNP pre-biased configuration, collector current, and breakdown voltage ratings, ensuring direct functional replacement capability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: NSBA114TDXV6T1G (onsemi)

The NSBA114TDXV6T1G is the preferred substitute for the obsolete PEMB4,115. This part maintains all mandatory electrical parameters (100mA collector current, 50V breakdown voltage, 10kOhms base resistor) and offers the highest power dissipation rating (500mW), providing thermal margin for applications originally designed for the 300mW PEMB4,115. The part is in active production status with ROHS3 compliance and MSL 1 rating. The SOT-563 package variant is compatible with SOT-666 footprints through appropriate PCB layout adaptation.

Secondary Substitute: EMB4T2R (Rohm Semiconductor)

The EMB4T2R provides full electrical equivalence with all mandatory parameters matched. This part is in active production with ROHS3 compliance and MSL 1 rating. The 150mW power rating is lower than the original PEMB4,115; selection of this part requires thermal analysis to confirm adequate dissipation for the application. The EMT6 package is compatible with SOT-666 footprints.

Tertiary Substitute: RN2911FE(TE85L,F) (Toshiba Semiconductor and Storage)

The RN2911FE(TE85L,F) maintains all mandatory electrical parameters and is in active production with RoHS compliance and MSL 1 rating. The 100mW power rating is the lowest among available substitutes; thermal analysis is required to confirm suitability. This part offers transition frequency specification (200MHz) not present in the original PEMB4,115.

All three substitute parts are in active production status, eliminating obsolescence risk associated with the PEMB4,115. Selection among these alternatives depends on thermal requirements, package preference, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the NSBA114TDXV6T1G directly replace the PEMB4,115 without PCB modifications?

A: The NSBA114TDXV6T1G uses SOT-563 packaging while the PEMB4,115 uses SOT-666. Both packages are compatible with dual PNP pre-biased transistor footprints; however, PCB layout adaptation may be required depending on the original design. Pin configurations and spacing differ between SOT-563 and SOT-666, necessitating footprint verification before assembly.

Q: What is the significance of the 10kOhms base resistor (R1) specification?

A: The 10kOhms base resistor is an internal component of the pre-biased transistor package. All substitute parts maintain this identical value, ensuring equivalent switching characteristics and bias behavior. This parameter is non-negotiable for substitution.

Q: Are there power dissipation differences between the PEMB4,115 and its substitutes?

A: Yes. The PEMB4,115 is rated for 300mW maximum power dissipation. The EMB4T2R is rated for 150mW, the RN2911FE(TE85L,F) for 100mW, and the NSBA114TDXV6T1G for 500mW. Applications operating near the 300mW limit of the original part require thermal analysis when selecting lower-rated substitutes. The NSBA114TDXV6T1G provides additional thermal margin.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. The EMB4T2R, NSBA114TDXV6T1G, and RN2911FE(TE85L,F) are all RoHS compliant. The PEMB4,115, EMB4T2R, and NSBA114TDXV6T1G carry ROHS3 certification. The RN2911FE(TE85L,F) carries RoHS compliance designation. All parts meet environmental regulatory requirements for restricted substance elimination.

Q: What is the Moisture Sensitivity Level (MSL) rating, and why is it important?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts, including the PEMB4,115 and its substitutes, carry MSL 1 rating, eliminating moisture-related reliability concerns during procurement and assembly.

Q: Can the EMB4T2R or RN2911FE(TE85L,F) be used in high-temperature applications?

A: The provided specifications do not include maximum operating temperature ratings. Thermal performance assessment requires consultation of detailed datasheets for each part. Selection based on power dissipation ratings alone is insufficient for high-temperature environments.

Q: Are there differences in DC current gain (hFE) between the PEMB4,115 and substitute parts?

A: Yes. The PEMB4,115 specifies hFE minimum of 200 @ 1mA, 5V. The EMB4T2R specifies 100 @ 1mA, 5V; the NSBA114TDXV6T1G specifies 160 @ 5mA, 10V; and the RN2911FE(TE85L,F) specifies 120 @ 1mA, 5V. These variations are acceptable for switching applications where the transistor operates in saturation or cutoff regions. Applications requiring specific gain characteristics require detailed circuit analysis.

Q: What is the significance of transition frequency (fT) specification?

A: Transition frequency indicates the frequency at which current gain drops to unity. The EMB4T2R specifies 250MHz and the RN2911FE(TE85L,F) specifies 200MHz. The PEMB4,115 and NSBA114TDXV6T1G do not specify this parameter. For switching applications operating below these frequencies, the absence of fT specification does not affect functionality. High-frequency applications require parts with specified transition frequency.