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Nexperia USA Inc. BC817-QR
- Part No.:
- BC817-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC817-QR.pdf
- Description:
- TRANS NPN 45V 0.5A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,244
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Product details
Overview
BC817-QR from Nexperia is a 45 V, 500 mA NPN general-purpose transistor in SOT23 (TO-236AB) package, designed for low-voltage switching and linear amplification in automotive and industrial control circuits. It delivers DC current gain (hFE) of 100–600 at VCE = 1 V, IC = 100 mA, supports peak collector current up to 1 A, and is qualified to AEC-Q101.
For engineers reviewing the BC817-QR datasheet, BC817-QR pinout, BC817-QR application, or BC817-QR equivalent, key selection criteria include its automotive-grade reliability, three hFE variants (16/25/40), low VCE(sat) of ≤700 mV at IC = 500 mA, and thermal resistance of 362 K/W on optimized PCB layout.
Technical Context
This NPN bipolar junction transistor operates in active, saturation, and cutoff regions with defined breakdown voltages: VCEO = 45 V, VCBO = 50 V, and VEBO = 5 V. Its pulsed operation supports single-pulse ICM = 1 A under tp ≤ 1 ms.
The device exhibits fT = 100 MHz at VCE = 5 V, IC = 10 mA, enabling use in medium-frequency signal amplification. Thermal derating follows two profiles: 250 mW at Tamb ≤ 25 °C on standard FR4, rising to 345 mW with 1 cm² collector pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown in open-base configuration. |
| IC | 500 mA - Continuous DC collector current rating at Tamb = 25 °C, defining steady-state switching capacity. |
| hFE | 100–600 - DC current gain range at VCE = 1 V, IC = 100 mA, determining base drive requirements. |
| VCE(sat) | ≤700 mV - Collector-emitter saturation voltage at IC = 500 mA, IB = 50 mA, directly impacting conduction loss. |
| Ptot | 345 mW - Max power dissipation with 1 cm² copper pad, setting thermal design margin for PCB layout. |
| fT | 100 MHz - Transition frequency indicating usable bandwidth for small-signal amplification. |
| Rth(j-a) | 362 K/W - Junction-to-ambient thermal resistance with enhanced copper pad, guiding heatsinking strategy. |
Pinout & Package
SOT23 (TO-236AB) surface-mount plastic package: 3-pin, 1.3 mm × 2.9 mm footprint, 1.1 mm height, tin-plated leads compatible with reflow and wave soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires ~50 mA drive for full saturation at 500 mA collector load. |
| 2 | Emitter (E) | Reference terminal for biasing; connected to ground or low-side return path in common-emitter configurations. |
| 3 | Collector (C) | High-current output node; electrically tied to PCB copper pour for thermal management in power-switching layouts. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and body electronics under temperature cycling and HTRB stress. |
| Three hFE variants | BC817-16-Q (100–250), BC817-25-Q (160–400), BC817-40-Q (250–600) enable precise base-drive optimization across load ranges. |
| Low VCE(sat) | ≤700 mV at IC = 500 mA ensures <1.2 W conduction loss in 2.4 Ω load switching, reducing thermal burden. |
| Thermal robustness | Junction temperature rated to 150 °C with 150 °C storage limit, supporting operation in under-hood environments. |
| Standard SOT23 footprint | Enables drop-in replacement with BC846, BC847, and MMBT3904 families while maintaining board-level compatibility. |
Applications
| Automotive Door Module Control | Industrial PLC Input Stage |
|---|---|
|
Use Scenario: Driving 12 V solenoid locks and LED status indicators in vehicle door control units. IC Role / Device Role / Timing Role: NPN switch controlling load current paths with fast turn-on (<100 ns) and low saturation loss. Use Value: AEC-Q101 qualification ensures 15-year field reliability; 45 V VCEO accommodates load-dump transients up to 40 V. |
Use Scenario: Level-shifting and isolation between 24 V field sensors and 3.3 V microcontroller inputs in programmable logic controllers. IC Role / Device Role / Timing Role: Active-low interface buffer providing galvanic separation and noise immunity in noisy factory environments. Use Value: 500 mA IC rating supports multiple parallel sensor inputs; 100 MHz fT preserves signal integrity for pulse-width modulated feedback. |
| Consumer Appliance Motor Driver | Medical Infusion Pump Actuator |
|
Use Scenario: Controlling brushed DC fan motors in HVAC systems and kitchen appliances. IC Role / Device Role / Timing Role: Low-side switch in H-bridge half-bridge stage, handling bidirectional PWM commutation. Use Value: 1 A ICM peak rating withstands motor startup surges; 345 mW Ptot enables compact heatsink-free PCB layout. |
Use Scenario: Precision current regulation for stepper motor microstepping in portable infusion pumps. IC Role / Device Role / Timing Role: Linear amplifier stage biasing current-sense resistors and driver FET gates with stable hFE. Use Value: Tight hFE binning (±20%) ensures repeatable current gain across production batches; 150 °C Tj rating supports sealed enclosure operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847C-Q | hFE = 420–800 at same test conditions; VCEO = 45 V; identical SOT23 package. | Higher gain reduces base drive requirement but increases sensitivity to temperature drift in linear mode. | Select when lower base current is critical and thermal stability is managed via external compensation. |
| MMBT3904LT1G | VCEO = 40 V; IC = 200 mA; hFE = 100–300; same pinout but lower power rating. | Not suitable for 500 mA continuous loads or automotive transients exceeding 40 V. | Use only in cost-sensitive consumer designs where 200 mA max current and non-automotive qualification are acceptable. |
Compared with BC847C-Q and MMBT3904LT1G, BC817-QR offers balanced gain, higher current capability, and automotive qualification-making it optimal for safety-critical 12/24 V switching where reliability and thermal headroom are prioritized over minimal base drive.
Availability
BC817-QR is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, consumer appliance motor control, and medical device actuation requiring stable component supply and long-term lifecycle support.
Supply support for BC817-QR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert specializing in high-volume, high-reliability discrete and logic devices, with manufacturing facilities certified to IATF 16949 and ISO 9001 standards.
The BC817-Q series belongs to Nexperia's AEC-Q101-qualified general-purpose transistor product line, engineered specifically for robust, cost-effective switching and amplification in harsh automotive and industrial environments.
FAQ
Is BC817-QR pin-compatible with BC847 or MMBT3904?
Yes, BC817-QR uses the standard SOT23 pinout (1=Base, 2=Emitter, 3=Collector), matching BC847, MMBT3904, and other industry-standard NPN transistors. Mechanical and solder footprint compatibility is confirmed per Nexperia's SOT23 outline drawing (Fig. 16), enabling direct PCB substitution without layout changes.
What is the maximum operating temperature for BC817-QR in continuous use?
The absolute maximum junction temperature is 150 °C, and ambient temperature range is –65 °C to +150 °C. For continuous operation, thermal design must ensure junction temperature remains ≤150 °C using the specified Rth(j-a) values: 362 K/W with 1 cm² collector pad or 500 K/W on standard FR4, per Table 7.
Does BC817-QR support pulse-width modulation (PWM) switching?
Yes-its 1 A peak collector current (ICM) and 100 ns typical switching times support PWM frequencies up to 100 kHz in low-side switching configurations. The 100 MHz fT ensures faithful amplification of PWM edge transitions, and VCE(sat) ≤700 mV minimizes conduction losses during active periods.
How does the "-Q" suffix affect BC817-QR's specifications?
The "-Q" suffix denotes AEC-Q101 qualification and automotive-grade screening, including extended temperature testing, humidity robustness, and mechanical shock validation. Electrical parameters remain identical to non-Q variants, but the -Q version guarantees performance across –40 °C to +125 °C ambient and meets automotive reliability lifetime targets.
BC817-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC817-Q
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 700mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 100mA, 1V
- Power - Max:
- 250 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BC817-QR FAQ
1.How can I place an order for BC817-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-QR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BC817-QR reliable?
The price and inventory of BC817-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-QR is usually 5 days.
3.What payment methods are accepted for BC817-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-QR?
BC817-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-QR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BC817-QR?
For technical support, including BC817-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-QR requirements.
6.How does Aetrix verify that BC817-QR is sourced from the original manufacturer or authorized distributors?
All BC817-QR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BC817-QR meets industry standards.
7.What is the process for return or replacement of BC817-QR?
All BC817-QR units undergo pre-shipment inspection (PSI). If there is an issue with BC817-QR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BC817-QR part is unused and in its original packaging.
Return procedure for BC817-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-QR Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
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MMBT3906-7-F
Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBTA06LT1G
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