PEMH13,315 Pre-Biased Dual NPN Transistor Equivalent & Substitute Parts

Part Overview

The PEMH13,315 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 and 300mW power dissipation. The part is classified as "Not For New Designs," indicating that alternative equivalent or substitute components should be evaluated for new circuit implementations. Identifying suitable substitutes ensures design flexibility, supply chain continuity, and access to components with active product status.

Substiute Parts

PEMH13,315

Nexperia USA Inc.In Stock: 1072PEMH13,315 Datasheet

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DDC143TH-7

Diodes IncorporatedIn Stock: 5593DDC143TH-7 Datasheet

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NSBC143ZDXV6T1G

onsemiIn Stock: 3903NSBC143ZDXV6T1G Datasheet

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RN1901FETE85LF

Toshiba Semiconductor and StorageIn Stock: 883RN1901FETE85LF Datasheet

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RN1906FE,LF(CT

Toshiba Semiconductor and StorageIn Stock: 3649RN1906FE,LF(CT Datasheet

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RN4906FE,LF(CT

Toshiba Semiconductor and StorageIn Stock: 5066RN4906FE,LF(CT Datasheet

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RN4986FE,LF(CT

Toshiba Semiconductor and StorageIn Stock: 4697RN4986FE,LF(CT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PEMH13,315 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Transistor configuration: 2 NPN - Pre-Biased (Dual)
• Maximum collector current: 100mA
• Maximum collector-emitter breakdown voltage: 50V
• Base resistor (R1): 4.7kOhms
• Emitter-base resistor (R2): 47kOhms
• Surface mount packaging with compatible pinout

Secondary Compatibility Factors:

• Power dissipation capability (minimum 300mW for direct replacement)
• DC current gain characteristics
• Saturation voltage performance
• RoHS3 compliance and MSL rating

Substitute parts are grouped into two categories:

Category A - Direct Dual NPN Substitutes: Parts maintaining identical 2 NPN configuration with matching resistor values and electrical specifications. These include NSBC143ZDXV6T1G and RN1906FE,LF(CT.

Category B - Functional Equivalents with Package Variations: Parts with dual NPN configuration, matching resistor values, and compatible electrical parameters but available in alternative surface mount packages (SOT-563 or ES6). These include DDC143TH-7 and RN1901FETE85LF.

Category C - Mixed Transistor Configuration: Parts with 1 NPN and 1 PNP configuration (RN4906FE,LF(CT and RN4986FE,LF(CT) are not direct substitutes due to different transistor type configuration and are listed for reference only.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred):

NSBC143ZDXV6T1G (onsemi) is the primary substitute for PEMH13,315. This part maintains identical dual NPN configuration with matching 4.7kOhms base resistor and 47kOhms emitter-base resistor values. The NSBC143ZDXV6T1G offers superior power dissipation capability (500mW versus 300mW), enhanced current cutoff performance (500nA), and active product status. The SOT-563 package is mechanically and electrically compatible with SOT-666 applications where board space permits. ROHS3 compliance and MSL 1 rating ensure environmental and handling compatibility.

RN1906FE,LF(CT (Toshiba Semiconductor) provides an alternative direct substitute with identical resistor configuration and dual NPN topology. This part features active product status, ROHS3 compliance, and 250MHz transition frequency capability. The ES6 package offers a compact surface mount option with equivalent electrical performance.

For Applications Requiring Specific Package Constraints:

DDC143TH-7 (Diodes Incorporated) is suitable for designs where SOT-563 packaging is specified. This part maintains dual NPN configuration and 4.7kOhms base resistor value. Note that the emitter-base resistor value is not specified in available documentation. Power dissipation is limited to 150mW, requiring verification against circuit requirements. Active product status and ROHS3 compliance are confirmed.

RN1901FETE85LF (Toshiba Semiconductor) offers ES6 package compatibility with dual NPN configuration and 4.7kOhms base resistor. The emitter-base resistor differs at 4.7kOhms (versus 47kOhms in the main part), resulting in different biasing characteristics. DC current gain is significantly lower (30 minimum versus 100 minimum). This part is suitable only for applications where lower gain and modified biasing are acceptable. Power dissipation is limited to 100mW.

Parts Not Recommended as Direct Substitutes:

RN4906FE,LF(CT and RN4986FE,LF(CT feature mixed transistor configuration (1 NPN, 1 PNP) and are not functionally equivalent to the dual NPN PEMH13,315. These parts are listed in the original substitute documentation but do not meet the primary substitution criteria.

Frequently Asked Questions (FAQ)

Q: Can NSBC143ZDXV6T1G replace PEMH13,315 in existing designs?

A: Yes. NSBC143ZDXV6T1G maintains identical dual NPN configuration, base resistor (4.7kOhms), and emitter-base resistor (47kOhms) values. The SOT-563 package is mechanically compatible with SOT-666 footprints in most surface mount applications. Verify PCB layout accommodates the alternative package dimensions. Higher power dissipation capability (500mW) provides additional design margin.

Q: What is the primary difference between DDC143TH-7 and PEMH13,315?

A: DDC143TH-7 is packaged in SOT-563 versus SOT-666 for the main part. The emitter-base resistor value is not specified for DDC143TH-7, introducing uncertainty in biasing behavior. Power dissipation is reduced to 150mW. These differences require circuit-level verification before substitution.

Q: Why are RN4906FE,LF(CT and RN4986FE,LF(CT listed but not recommended?

A: These parts feature 1 NPN and 1 PNP transistor configuration, fundamentally different from the dual NPN topology of PEMH13,315. They are not direct functional equivalents and are listed for reference only. Use these parts only if circuit design specifically requires mixed transistor configuration.

Q: How do resistor value differences affect substitution?

A: Internal resistor values (R1 and R2) directly determine transistor biasing and switching characteristics. PEMH13,315 specifies 4.7kOhms base resistor and 47kOhms emitter-base resistor. Substitutes must maintain these values for equivalent circuit behavior. RN1901FETE85LF uses 4.7kOhms for both resistors, altering bias point and gain characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: NSBC143ZDXV6T1G, DDC143TH-7, RN1906FE,LF(CT, and RN4986FE,LF(CT are ROHS3 compliant. RN1901FETE85LF is RoHS compliant but not specifically designated ROHS3. Verify compliance requirements for your application.

Q: What is the significance of product status (Active vs. Not For New Designs)?

A: PEMH13,315 is marked "Not For New Designs," indicating Nexperia has discontinued active development and recommends alternatives for new circuit implementations. All listed substitutes carry "Active" product status, ensuring ongoing manufacturer support, availability, and process stability for new designs.

Q: Can RN1901FETE85LF be used as a substitute despite lower DC current gain?

A: RN1901FETE85LF has minimum DC current gain of 30 at 10mA, 5V, compared to 100 for PEMH13,315. This 70% reduction in gain affects switching speed and biasing behavior. Substitution is valid only if circuit design accommodates lower gain characteristics. Verify saturation voltage and switching performance in application-specific testing.

Q: What package considerations apply when substituting SOT-666 with SOT-563?

A: SOT-563 and SOT-666 are both 6-pin surface mount packages with different physical dimensions. SOT-563 is more compact. Verify PCB footprint compatibility, trace routing, and thermal management requirements. Pin assignment must match between packages to ensure correct circuit operation.