PEMH9,115 Pre-Biased Dual NPN Transistor Equivalent & Substitute Parts

Part Overview

The PEMH9,115 is a pre-biased dual NPN bipolar junction transistor (BJT) manufactured by Nexperia USA Inc. in SOT-666 surface mount packaging. This component integrates two NPN transistors with internal biasing resistors, designed for 50V operation at maximum 100mA collector current with 300mW power dissipation. The part is classified as "Not For New Designs," indicating end-of-life status. Identifying equivalent and substitute parts is necessary for ongoing production support, field repairs, and design continuity in existing applications where this component is currently deployed.

Substiute Parts

PEMH9,115

Nexperia USA Inc.In Stock: 5031PEMH9,115 Datasheet

Current PartRFQ

EMH59T2R

Rohm SemiconductorIn Stock: 762EMH59T2R Datasheet

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NSBC114YDXV6T1G

Fairchild SemiconductorIn Stock: 53129NSBC114YDXV6T1G Datasheet

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RN1907FE,LF(CT

Toshiba Semiconductor and StorageIn Stock: 1474RN1907FE,LF(CT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PEMH9,115 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Transistor configuration: 2 NPN - Pre-Biased (Dual)
• Voltage rating: 50V Collector-Emitter breakdown minimum
• Current rating: 100mA maximum collector current
• Internal biasing resistors: R1 = 10kOhms, R2 = 47kOhms
• Surface mount packaging: SOT-563 or SOT-666 compatible
• RoHS3 compliance and MSL Level 1

Secondary Compatibility Factors:

• DC current gain (hFE) minimum specification
• Vce saturation voltage
• Collector cutoff current
• Power dissipation capability
• Frequency response (where specified)

Three substitute parts meet the mandatory criteria and are listed below. Differences in secondary parameters are documented in the Parameter Comparison table to enable application-specific selection.

Parameter Comparison

Engineering Selection Recommendations

EMH59T2R (Rohm Semiconductor)

The EMH59T2R is an active product with full ROHS3 compliance and MSL Level 1 rating. This substitute maintains all mandatory electrical parameters and internal biasing resistor values. The primary trade-off is reduced maximum power dissipation (150mW versus 300mW) and lower DC current gain specification (80 versus 100 at different test conditions). The EMH59T2R includes specified transition frequency of 250MHz. This part is suitable for applications where the original 300mW power budget is not fully utilized and where active product status is required for long-term supply assurance.

NSBC114YDXV6T1G (Fairchild Semiconductor)

The NSBC114YDXV6T1G is an active product with the highest maximum power dissipation rating (500mW) among the substitutes. All mandatory electrical parameters and internal biasing resistor values are maintained. The Vce saturation voltage is elevated (250mV maximum) compared to the original part. RoHS and MSL compliance information is not provided in the available data. This part accommodates applications requiring higher power headroom and is available in high inventory quantities.

RN1907FE,LF(CT (Toshiba Semiconductor and Storage)

The RN1907FE,LF(CT is an active product with full ROHS3 compliance and MSL Level 1 rating. All mandatory electrical parameters and internal biasing resistor values are maintained. This substitute features the lowest maximum power dissipation (100mW) and the lowest collector cutoff current (100nA). The Vce saturation voltage is the highest among substitutes (300mV maximum). The RN1907FE,LF(CT includes specified transition frequency of 250MHz. This part is suitable for low-power applications and where leakage current minimization is critical.

All three substitutes are active products, eliminating the end-of-life status of the original PEMH9,115. Selection between substitutes depends on specific application requirements for power dissipation, saturation voltage performance, and leakage current characteristics.

Frequently Asked Questions (FAQ)

Q: Can the EMH59T2R replace the PEMH9,115 in all applications?

A: The EMH59T2R maintains all mandatory electrical parameters and internal biasing resistor values. However, the maximum power dissipation is reduced from 300mW to 150mW. Applications operating near the original 300mW limit require thermal analysis to confirm the lower rating is acceptable. The DC current gain specification differs (80 versus 100), which may affect circuit performance in gain-sensitive applications.

Q: What is the primary difference between the NSBC114YDXV6T1G and other substitutes?

A: The NSBC114YDXV6T1G provides the highest power dissipation capability (500mW) and is available in the largest inventory quantity (53,100 pieces). The Vce saturation voltage is elevated at 250mV maximum, which may impact switching speed and efficiency in saturation-mode applications. This part is optimal for applications requiring maximum thermal margin.

Q: Are all substitutes compatible with the original SOT-666 package footprint?

A: All substitutes support SOT-563 and SOT-666 package options. However, the supplier device packages differ: EMH59T2R uses EMT6, NSBC114YDXV6T1G uses SOT-563, and RN1907FE,LF(CT uses ES6. Physical footprint compatibility must be verified against the specific supplier package selected. PCB layout review is required before implementation.

Q: Which substitute has the best leakage current performance?

A: The RN1907FE,LF(CT has the lowest collector cutoff current specification at 100nA (ICBO), compared to 500nA for EMH59T2R and NSBC114YDXV6T1G, and 1µA for the original PEMH9,115. This makes the Toshiba part suitable for low-power and precision applications where leakage minimization is required.

Q: Do all substitutes have the same internal biasing resistor configuration?

A: Yes. All three substitutes maintain the identical internal biasing resistor configuration: R1 = 10kOhms (base resistor) and R2 = 47kOhms (emitter-base resistor). This ensures circuit behavior consistency across substitution options.

Q: What is the significance of the "Not For New Designs" status of the PEMH9,115?

A: This designation indicates the original part is at end-of-life and Nexperia does not recommend its use in new product designs. All three substitutes carry "Active" product status, ensuring long-term availability and continued manufacturer support. For ongoing production and field service applications, migration to an active substitute is necessary for supply chain continuity.

Q: Are all substitutes RoHS3 compliant?

A: EMH59T2R and RN1907FE,LF(CT are explicitly ROHS3 compliant. NSBC114YDXV6T1G does not provide RoHS compliance information in the available data. Verification with the Fairchild supplier is required if RoHS3 compliance is a mandatory requirement.

Q: How do the transition frequency specifications affect substitution?

A: The original PEMH9,115 does not specify transition frequency. EMH59T2R and RN1907FE,LF(CT both specify 250MHz transition frequency, indicating improved high-frequency performance. For applications operating below this frequency, the specification difference is not limiting. For high-frequency switching applications, the specified transition frequency of the substitutes provides additional performance margin.