2PC4081R-QX Equivalent & Substitute Parts

Part Overview

The 2PC4081R-QX is an NPN bipolar junction transistor (BJT) manufactured by Nexperia USA Inc. in the SOT-323 surface mount package. This device is rated for 50 V collector-emitter breakdown voltage, 150 mA maximum collector current, and 200 mW power dissipation. The transistor operates at frequencies up to 100 MHz and is qualified to AEC-Q101 automotive standards with ROHS3 compliance. The part is currently in active production status with 816 units in stock. Substitute parts are identified based on identical electrical specifications and mechanical compatibility within the same package family.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector Current (Max)	150	mA
Collector-Emitter Breakdown Voltage (Max)	50	V
Vce Saturation (Max)	400	mV @ 5mA, 50mA
Collector Cutoff Current (Max)	100	nA
DC Current Gain (hFE Min)	180	@ 1mA, 6V
Power Dissipation (Max)	200	mW
Transition Frequency	100	MHz
Operating Temperature (Max)	150	°C
Package Type	SOT-323 / SC-70	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the 2PC4081R-QX are identified as parametric equivalents based on matching all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters:

Transistor Type: NPN configuration
Collector Current Rating: 150 mA maximum
Collector-Emitter Breakdown Voltage: 50 V maximum
Saturation Voltage: 400 mV @ 5mA, 50mA
Collector Cutoff Current: 100 nA maximum
DC Current Gain: 180 minimum @ 1mA, 6V
Power Dissipation: 200 mW maximum
Transition Frequency: 100 MHz
Operating Temperature: 150°C maximum junction temperature
Package: SOT-323 / SC-70 surface mount
Automotive Grade: AEC-Q101 qualified
Environmental Compliance: ROHS3 compliant

All identified substitute parts maintain identical electrical performance characteristics and mechanical compatibility. The substitutes differ only in packaging tape reel designations and moisture sensitivity level ratings, which do not affect functional equivalence.

Parameter Comparison

Parameter	2PC4081R-QX	2PC4081R,115	2PC4081R,135
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.
Transistor Type	NPN	NPN	NPN
Collector Current (Max)	150 mA	150 mA	150 mA
Collector-Emitter Breakdown Voltage (Max)	50 V	50 V	50 V
Vce Saturation (Max)	400 mV @ 5mA, 50mA	400 mV @ 5mA, 50mA	400 mV @ 5mA, 50mA
Collector Cutoff Current (Max)	100 nA	100 nA	100 nA
DC Current Gain (hFE Min)	180 @ 1mA, 6V	180 @ 1mA, 6V	180 @ 1mA, 6V
Power Dissipation (Max)	200 mW	200 mW	200 mW
Transition Frequency	100 MHz	100 MHz	100 MHz
Operating Temperature (Max)	150°C	150°C	150°C
Package / Case	SOT-323 / SC-70	SOT-323 / SC-70	SOT-323 / SC-70
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Grade	Automotive	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—2PC4081R-QX, 2PC4081R,115, and 2PC4081R,135—are functionally equivalent and interchangeable for circuit applications requiring NPN BJT transistors with the specified electrical and thermal characteristics. Selection among these parts is based on availability and supply chain requirements rather than technical performance differences.

All parts maintain active production status with Nexperia USA Inc. and carry AEC-Q101 automotive qualification, confirming suitability for automotive and industrial applications. ROHS3 compliance ensures environmental regulatory adherence across all three variants.

The 2PC4081R,115 variant offers the highest inventory availability at 40,817 units in stock. The 2PC4081R,135 variant provides 10,789 units in stock. The primary part 2PC4081R-QX maintains 816 units in stock. Inventory levels support direct substitution based on supply requirements.

Frequently Asked Questions (FAQ)

Q: Are the 2PC4081R,115 and 2PC4081R,135 parts direct replacements for the 2PC4081R-QX?

A: Yes. All three parts are parametric equivalents with identical electrical specifications, thermal ratings, and package configurations. They are directly interchangeable in circuit applications.

Q: What is the difference between the three part numbers?

A: The differences are limited to packaging tape reel designations and moisture sensitivity level (MSL) ratings. The 2PC4081R,115 and 2PC4081R,135 variants specify MSL 1 (Unlimited), while the primary part does not specify MSL. These differences do not affect functional performance or circuit compatibility.

Q: Can these parts be used in automotive applications?

A: Yes. All three parts are automotive-grade transistors qualified to AEC-Q101 standards, confirming their suitability for automotive circuit designs and manufacturing environments.

Q: Are all parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the SOT-323 package?

A: SOT-323, also designated SC-70, is a surface mount semiconductor package with three leads. This compact package is standard for small-signal transistors and enables high-density circuit board layouts.

Q: Which part should I select based on availability?

A: Selection should be based on supply chain requirements and inventory levels. The 2PC4081R,115 offers the highest stock availability, followed by 2PC4081R,135, then 2PC4081R-QX. All parts are functionally equivalent for circuit design purposes.

Q: Do these transistors require any special handling or storage conditions?

A: The 2PC4081R,115 and 2PC4081R,135 variants specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard electronic component handling and storage practices apply to all three parts.

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