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Nexperia USA Inc. BC817-25-QR
- Part No.:
- BC817-25-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC817-25-QR.pdf
- Description:
- TRANS NPN 45V 0.5A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:27,852
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Product details
Overview
BC817-25-QR from Nexperia is a 45 V, 500 mA NPN general-purpose transistor in SOT23 (TO-236AB) package, with DC current gain (hFE) of 160–400 at VCE = 1 V and IC = 100 mA, VCE(sat) ≤ 700 mV at IC = 500 mA/IB = 50 mA, and qualified to AEC-Q101 for automotive use. It serves as a low-voltage switching and amplification device in power management and signal interface circuits.
For engineers reviewing the BC817-25-QR datasheet, BC817-25-QR pinout, BC817-25-QR application, or BC817-25-QR equivalent, this page delivers verified electrical parameters, thermal derating behavior, SOT23 terminal mapping, automotive qualification status, and validated alternative transistors for design-in and BOM optimization.
Technical Context
This NPN bipolar junction transistor operates in linear or saturated switching modes with base-controlled current amplification. Its hFE range (160–400) enables predictable gain selection for biasing stability across temperature (−55 °C to 150 °C), while VCE(sat) ≤ 700 mV at high IC/IB ratio ensures low conduction loss in driver stages.
The device meets AEC-Q101 stress test requirements including HTGB, HTRB, and temperature cycling, confirming robustness for under-hood automotive modules. Thermal resistance Rth(j-a) is 362 K/W on FR4 PCB with 1 cm² collector pad, supporting continuous operation up to 125 °C ambient when derated per Fig. 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in 3.3 V/5 V/12 V switching rails. |
| IC | 500 mA - Continuous DC collector current rating; supports relay drivers, LED loads, and small-signal power switches. |
| hFE | 160–400 - DC current gain at VCE = 1 V, IC = 100 mA; enables stable base resistor calculation for saturation control. |
| VCE(sat) | ≤ 700 mV - Collector-emitter saturation voltage at IC = 500 mA, IB = 50 mA; limits power dissipation to ≤350 mW in hard-switched mode. |
| fT | 100 MHz - Transition frequency at VCE = 5 V, IC = 10 mA; supports audio-frequency amplification and fast digital switching up to ~10 MHz. |
| Rth(j-a) | 362 K/W - Junction-to-ambient thermal resistance on FR4 with 1 cm² collector pad; determines max ambient temperature before Tj exceeds 150 °C. |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; 1.9 mm × 1.1 mm footprint, 1.2 mm height, and gull-wing lead form for reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires series resistor to limit IB and ensure saturation at target IC. |
| 2 | Emitter (E) | Common reference terminal; connected to ground or low-side return path in common-emitter configurations. |
| 3 | Collector (C) | High-current output node; routed to load (e.g., relay coil, LED anode); thermally coupled to PCB copper for heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Three hFE variants | BC817-16-Q (100–250), BC817-25-Q (160–400), BC817-40-Q (250–600) enable precise gain matching without redesign. |
| Low VCE(sat) | ≤700 mV at IC/IB = 10 ensures minimal voltage drop and heat generation in saturated switching applications. |
| Thermal performance | 362 K/W Rth(j-a) on optimized FR4 layout allows >300 mW continuous dissipation at 85 °C ambient. |
| Small-outline packaging | SOT23 footprint reduces board area by >50% vs. TO-92, enabling high-density automotive and portable designs. |
Applications
| Automotive Door Module Switching | Industrial PLC Input Buffer |
|---|---|
Use Scenario: Driving 12 V solenoid locks and window motor relays in door control units. IC Role / Device Role / Timing Role: NPN switch controlling relay coil current with base driven by microcontroller GPIO. Use Value: VCEO = 45 V withstands load dump transients; AEC-Q101 qualification ensures reliability over 15-year vehicle life. |
Use Scenario: Level-shifting and isolating 24 V field signals into 3.3 V logic inputs of programmable logic controllers. IC Role / Device Role / Timing Role: Discrete level translator with current-limiting base resistor and pull-down emitter. Use Value: hFE ≥160 guarantees full saturation at low drive current; SOT23 enables compact DIN-rail mount PCB layouts. |
| Consumer Appliance Motor Control | Medical Diagnostic Sensor Interface |
Use Scenario: Controlling small DC fan motors and buzzer actuators in smart home appliances. IC Role / Device Role / Timing Role: Low-side switch interfacing MCU PWM outputs to inductive loads. Use Value: fT = 100 MHz supports clean PWM edge integrity up to 20 kHz; VCE(sat) ≤ 700 mV minimizes self-heating during duty-cycle modulation. |
Use Scenario: Amplifying low-level analog signals from temperature and pressure sensors in handheld diagnostic tools. IC Role / Device Role / Timing Role: Common-emitter amplifier stage with fixed-gain bias network. Use Value: Tight hFE spread (160–400) enables repeatable gain calibration; low Cc = 3 pF preserves signal bandwidth above 1 MHz. |
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 |
|---|---|---|---|
| BC817-25 | No "-QR" suffix; standard industrial grade, not AEC-Q101 qualified. | Lacks automotive stress-test validation; unsuitable for safety-critical or under-hood use. | Select only for cost-sensitive consumer or industrial non-automotive designs where qualification is not required. |
| MMBT3904LT1G | hFE = 100–300 at IC = 10 mA; VCEO = 40 V; Ptot = 310 mW; same SOT23 package. | Lower VCEO and gain range reduce margin in 12 V automotive systems and high-gain analog stages. | Use where lower voltage rating suffices and tighter hFE tolerance is acceptable; verify VCE(sat) at 500 mA. |
Compared with BC817-25-QR, BC817-25 lacks automotive qualification and long-term reliability validation, while MMBT3904LT1G trades 5 V lower breakdown voltage and reduced gain headroom for broader distributor availability-making BC817-25-QR optimal for AEC-compliant designs requiring guaranteed 45 V operation and 160+ hFE.
Availability
BC817-25-QR is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, consumer appliance motor control, and medical sensor signal conditioning requiring stable component supply across extended product lifecycles.
Supply support for BC817-25-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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BC817-Q series targets automotive and industrial applications requiring AEC-Q101 compliance, consistent gain binning, and robust thermal performance in space-constrained SMT designs.
FAQ
Is BC817-25-QR pin-compatible with BC817-25?
Yes, BC817-25-QR uses the identical SOT23 (TO-236AB) package and pinout (1-B, 2-E, 3-C) as BC817-25. The "-QR" suffix denotes AEC-Q101 qualification and enhanced traceability-not mechanical or electrical differences. Layouts and footprints are fully interchangeable.
What is the maximum allowable base current for continuous operation?
The absolute maximum peak base current is 200 mA per Table 6, but for continuous DC operation, IB must be limited to maintain junction temperature ≤150 °C. At IC = 500 mA and hFE = 160, IB ≈ 3.1 mA is sufficient for saturation; typical design uses 5–10 mA with series resistor for margin and thermal safety.
Can BC817-25-QR replace BC847B in existing designs?
No-BC847B has VCEO = 45 V but hFE = 200–450 at IC = 2 mA, optimized for low-current amplification. BC817-25-QR is rated for 500 mA continuous and specified at IC = 100 mA, making it better suited for power switching. Gain behavior and saturation characteristics differ significantly at low currents.
Does BC817-25-QR require heatsinking in standard SOT23 mounting?
No external heatsink is needed. With Rth(j-a) = 362 K/W on FR4 with 1 cm² collector pad, power dissipation ≤300 mW keeps Tj < 125 °C at 85 °C ambient. For 500 mA switching at 700 mV VCE(sat), PD = 350 mW-requiring either derating to 85 °C ambient or minor copper pour enhancement, not discrete heatsinking.
BC817-25-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:
- 160 @ 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
BC817-25-QR FAQ
1.How can I place an order for BC817-25-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-25-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 BC817-25-QR reliable?
The price and inventory of BC817-25-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-25-QR is usually 5 days.
3.What payment methods are accepted for BC817-25-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-25-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-25-QR?
BC817-25-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-25-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 BC817-25-QR?
For technical support, including BC817-25-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-25-QR requirements.
6.How does Aetrix verify that BC817-25-QR is sourced from the original manufacturer or authorized distributors?
All BC817-25-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 BC817-25-QR meets industry standards.
7.What is the process for return or replacement of BC817-25-QR?
All BC817-25-QR units undergo pre-shipment inspection (PSI). If there is an issue with BC817-25-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 BC817-25-QR part is unused and in its original packaging.
Return procedure for BC817-25-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-25-QR Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
onsemi
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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
onsemi
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
onsemi
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