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Equivalent & Substitute Parts for 2PC4081Q,135
Part Overview
The 2PC4081Q,135 is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in the SOT-323 package. This automotive-grade component operates at a maximum collector current of 150 mA, collector-emitter breakdown voltage of 50 V, and maximum power dissipation of 200 mW. The device is qualified to AEC-Q101 standards and carries Active product status with ROHS3 compliance.
Equivalent and substitute parts are identified to address component availability, supply chain continuity, and design flexibility while maintaining electrical and mechanical compatibility within specified parameter ranges.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Transistor Type | NPN | — |
| Current - Collector (Ic) Max | 150 | mA |
| Voltage - Collector Emitter Breakdown (Max) | 50 | V |
| Vce Saturation (Max) @ Ib, Ic | 400 mV @ 5 mA, 50 mA | — |
| Current - Collector Cutoff (Max) | 100 | nA |
| DC Current Gain (hFE) Min @ Ic, Vce | 120 @ 1 mA, 6 V | — |
| Power - Max | 200 | mW |
| Frequency - Transition | 100 | MHz |
| Operating Temperature (TJ) | 150 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | SC-70, SOT-323 | — |
| Grade | Automotive | — |
| Qualification | AEC-Q101 | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitute parts are classified into three categories based on electrical and mechanical compatibility with the 2PC4081Q,135:
Parametric Equivalents share identical electrical specifications and package form factor. These parts are direct functional replacements with no design modifications required.
Direct Manufacturer Equivalents maintain core electrical parameters but may differ in transition frequency or package designation (UMT3 vs. SOT-323). These parts are functionally compatible but carry different product status classifications.
Similar Parts meet the primary electrical requirements (Ic, Vce, power dissipation, saturation voltage) but operate within different voltage or current gain ranges, or employ alternative package types (SOT-523). These parts require circuit-level evaluation for specific applications.
Substitution eligibility is determined by the following key parameters:
- Collector current rating (150 mA minimum)
- Collector-emitter breakdown voltage (50 V minimum)
- Saturation voltage characteristics (400 mV @ specified conditions)
- Power dissipation capability (200 mW or greater)
- Surface mount package compatibility
- Automotive qualification and compliance status
Parameter Comparison
| Part Number | Manufacturer | Ic (Max) mA | Vce(BR) V | Power mW | fT MHz | hFE @ 1mA, 6V | Package | Product Status |
|---|---|---|---|---|---|---|---|---|
| 2PC4081Q,135 | Nexperia USA Inc. | 150 | 50 | 200 | 100 | 120 | SOT-323 | Active |
| 2PC4081Q,115 | Nexperia USA Inc. | 150 | 50 | 200 | 100 | 120 | SOT-323 | Active |
| 2SC4081T106Q | Rohm Semiconductor | 150 | 50 | 200 | 180 | 120 | SOT-323 | Not For New Designs |
| 2SC4081T106S | Rohm Semiconductor | 150 | 50 | 200 | 180 | 120 | SOT-323 | Not For New Designs |
| 2DC4617Q-7-F | Diodes Incorporated | 150 | 50 | 150 | 180 | 120 | SOT-523 | Active |
| 2DC4617R-7-F | Diodes Incorporated | 150 | 50 | 150 | 180 | 180 | SOT-523 | Active |
| 2DC4617S-7-F | Diodes Incorporated | 150 | 50 | 150 | 180 | 270 | SOT-523 | Active |
| BC847AW RFG | Taiwan Semiconductor Corporation | 100 | 45 | 200 | 100 | 110 | SOT-323 | Active |
| BC847BW RFG | Taiwan Semiconductor Corporation | 100 | 45 | 200 | 100 | 200 | SOT-323 | Active |
| BC847CW RFG | Taiwan Semiconductor Corporation | 100 | 45 | 200 | 100 | 420 | SOT-323 | Active |
| BC850AW RFG | Taiwan Semiconductor Corporation | 100 | 45 | 200 | 100 | 110 | SOT-323 | Active |
Engineering Selection Recommendations
Parametric Equivalent Selection
The 2PC4081Q,115 is a parametric equivalent manufactured by Nexperia USA Inc. with identical electrical specifications and Active product status. This part is the preferred direct replacement for the 2PC4081Q,135 and requires no circuit modifications.
Direct Manufacturer Equivalent Selection
The 2SC4081T106Q and 2SC4081T106S, manufactured by Rohm Semiconductor, maintain all critical electrical parameters including collector current, breakdown voltage, saturation voltage, and power dissipation. Both parts are designated as Not For New Designs, indicating they are suitable for legacy system support and field replacement but not recommended for new product development.
Similar Part Selection
The 2DC4617 series (2DC4617Q-7-F, 2DC4617R-7-F, 2DC4617S-7-F) manufactured by Diodes Incorporated are Active products with identical collector current and breakdown voltage ratings. These parts employ the SOT-523 package instead of SOT-323, requiring PCB layout modifications. Power dissipation is reduced to 150 mW, which may limit application scope. DC current gain varies across the series (120, 180, 270 @ 1 mA, 6 V), allowing selection based on specific circuit requirements.
The BC847 and BC850 series manufactured by Taiwan Semiconductor Corporation are Active products with reduced collector current (100 mA maximum) and collector-emitter breakdown voltage (45 V maximum). These parts are suitable only for applications where the 2PC4081Q,135 operates below these reduced ratings. The BC847 series offers three gain grades (A, B, C variants), while BC850AW RFG provides a single gain grade equivalent to BC847AW RFG.
Compliance and Qualification
The 2PC4081Q,135 carries Automotive grade classification and AEC-Q101 qualification. The 2PC4081Q,115 maintains identical compliance. The Rohm 2SC4081 series does not specify automotive qualification in the provided data. The Diodes Incorporated 2DC4617 series and Taiwan Semiconductor Corporation BC847/BC850 series do not carry automotive grade designation in the provided specifications. For automotive applications requiring AEC-Q101 compliance, the 2PC4081Q,115 is the recommended equivalent.
Frequently Asked Questions (FAQ)
Q: Can the 2PC4081Q,115 be used as a direct replacement for the 2PC4081Q,135?
A: Yes. The 2PC4081Q,115 is a parametric equivalent with identical electrical specifications, package type (SOT-323), and Active product status. No circuit modifications are required.
Q: What is the difference between the 2PC4081Q,135 and 2PC4081Q,115?
A: Both parts are manufactured by Nexperia USA Inc. and share identical electrical parameters. The suffix designations (135 vs. 115) indicate different tape reel configurations or manufacturing date codes. Electrical performance is equivalent.
Q: Can the Rohm 2SC4081T106Q or 2SC4081T106S replace the 2PC4081Q,135 in new designs?
A: These parts maintain electrical compatibility but are designated Not For New Designs. They are suitable for field replacement and legacy system support only. For new product development, use the 2PC4081Q,115 or equivalent Active-status parts.
Q: Why do the Diodes Incorporated 2DC4617 series parts have lower power dissipation (150 mW vs. 200 mW)?
A: The 2DC4617 series is designed for lower power applications. While collector current and breakdown voltage ratings are maintained, the reduced power budget may limit thermal performance in high-dissipation circuits. Verify thermal requirements before substitution.
Q: Can the BC847 or BC850 series replace the 2PC4081Q,135?
A: The BC847 and BC850 series have reduced collector current (100 mA maximum) and collector-emitter breakdown voltage (45 V maximum) compared to the 2PC4081Q,135 (150 mA, 50 V). These parts are suitable only for applications operating within their reduced ratings. Circuit-level evaluation is required.
Q: What is the difference between the 2DC4617Q-7-F, 2DC4617R-7-F, and 2DC4617S-7-F?
A: All three parts share identical electrical ratings except for DC current gain (hFE). The Q variant specifies 120 hFE, the R variant specifies 180 hFE, and the S variant specifies 270 hFE, all measured at 1 mA collector current and 6 V collector-emitter voltage. Selection depends on circuit gain requirements.
Q: Does the SOT-523 package used by the 2DC4617 series fit the same PCB footprint as the SOT-323 package?
A: No. SOT-523 and SOT-323 are different package types with different pin configurations and footprints. PCB layout modifications are required if substituting 2DC4617 series parts for the 2PC4081Q,135.
Q: Is the 2PC4081Q,135 suitable for automotive applications?
A: Yes. The 2PC4081Q,135 carries Automotive grade classification and AEC-Q101 qualification. For automotive applications, use the 2PC4081Q,115 as an equivalent, as it maintains identical automotive qualification.
Q: What is the operating temperature range for the 2PC4081Q,135?
A: The maximum junction temperature (TJ) is 150°C. The 2PC4081Q,135 does not specify a minimum operating temperature in the provided data. The BC847 and BC850 series specify an operating range of -55°C to 150°C.
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