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Diodes Incorporated BC817-25W-7
- Part No.:
- BC817-25W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC817-25W-7.pdf
- Description:
- TRANS NPN 45V 0.5A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:116,284
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Product details
Overview
BC817-25W-7 from Diodes Incorporated is a 45 V, 500 mA NPN small-signal transistor in SOT323 package, featuring hFE = 160–400 at IC = 100 mA, VCE(SAT) ≤ 700 mV at IC = 500 mA/IB = 50 mA, and fT = 100 MHz - used for general-purpose switching and audio-frequency amplification in compact consumer and industrial PCBs.
For engineers reviewing the BC817-25W-7 datasheet, BC817-25W-7 pinout, BC817-25W-7 application, or BC817-25W-7 equivalent, key selection criteria include DC current gain binning (25W grade), thermal resistance (625 °C/W), SOT323 lead-free terminal finish, AEC-Q101 qualification, and complementary PNP pairing with BC807-25W.
Technical Context
This NPN bipolar junction transistor employs epitaxial planar die construction for stable gain and low leakage. It operates across –65 °C to +150 °C with 4 kV HBM ESD rating and is optimized for linear amplification (fT = 100 MHz) and saturated switching (VCE(SAT) ≤ 700 mV under heavy drive).
Its SOT323 package enables automated insertion and supports high-density layouts. The device is fully RoHS-compliant, halogen- and antimony-free ("Green"), and qualified to AEC-Q101 for automotive-grade reliability - distinguishing it from generic signal transistors not rated for automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - maximum safe collector-emitter voltage before breakdown in common-emitter configuration |
| IC (continuous) | 500 mA - steady-state collector current limit defining usable drive capability in switching or amplification |
| hFE range | 160–400 - guaranteed DC current gain at IC = 100 mA/VCE = 1 V, enabling predictable base drive sizing |
| VCE(SAT) | ≤ 700 mV at IC = 500 mA/IB = 50 mA - low saturation voltage reduces conduction loss in switch-mode operation |
| fT | 100 MHz - unity-gain frequency confirming suitability for AF and low-MHz signal amplification |
| RθJA | 625 °C/W - thermal resistance indicating power derating needed on standard FR4 PCB without heatsinking |
| ESD HBM | 4,000 V - robustness against human-body electrostatic discharge during handling and assembly |
Pinout & Package
SOT323 plastic surface-mount package: 3-terminal, molded "Green" compound (UL 94V-0), 0.006 g weight, moisture sensitivity level 1, matte tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Reference node for biasing; connects to ground or low-side return path in common-emitter switches |
| 2 (Base) | Control input | Receives current-limited drive to modulate collector current; requires series resistor for digital logic interfacing |
| 3 (Collector) | Current source terminal | Connects to load or supply rail; carries switched/amplified output current with minimal saturation loss |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use, including engine control modules and body electronics requiring high-reliability discrete transistors |
| hFE binned (25W) | Guaranteed 160–400 gain range ensures consistent switching thresholds and amplifier bias stability across production lots |
| SOT323 footprint | Enables automated placement and reflow soldering in space-constrained designs where SOT23 is too large |
| Lead-free & "Green" | Meets EU RoHS 2 and halogen/antimony restrictions (<900 ppm Br/Cl, <1000 ppm Sb), supporting eco-compliant manufacturing |
Applications
| Automotive Body Control Module | USB-C Power Delivery Interface |
|---|---|
Use Scenario: Driving LED status indicators and relay coils in door modules and lighting controllers. IC Role / Device Role / Timing Role: NPN switch controlling 12 V loads with logic-level base drive from microcontroller GPIO. Use Value: Low VCE(SAT) minimizes heat generation in sealed enclosures; AEC-Q101 rating ensures long-term reliability under thermal cycling. | Use Scenario: Enabling/disabling auxiliary power paths and fault isolation in USB-C PD sink circuits. IC Role / Device Role / Timing Role: Discrete load switch for 5–20 V auxiliary rails, controlled by PD controller's enable signals. Use Value: 45 V VCEO safely accommodates USB-C PD's 20 V max; SOT323 footprint fits tight routing near Type-C connectors. |
| Industrial Sensor Signal Conditioning | Smart Home Zigbee Router Power Management |
Use Scenario: Amplifying low-level analog outputs from temperature or pressure sensors before ADC sampling. IC Role / Device Role / Timing Role: Common-emitter amplifier stage providing 20–40 dB voltage gain at audio frequencies. Use Value: 100 MHz fT ensures flat gain response up to 10 kHz; tight hFE binning improves calibration repeatability. | Use Scenario: Controlling 3.3 V and 5 V domain power sequencing for Zigbee SoC, RF front-end, and memory subsystems. IC Role / Device Role / Timing Role: Discrete power gate for multi-rail sequencing, triggered by system supervisor IC. Use Value: 500 mA IC supports typical router sub-circuit loads; RoHS/Green compliance meets global smart-home certification requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC817-25LT1G (ON Semiconductor) | Same hFE bin (160–400), but SOT23 package (larger footprint, higher RθJA = 400 °C/W) | Preferred where board real estate allows larger pad layout and higher thermal mass is acceptable | Select when legacy SOT23 tooling exists and thermal margin exceeds 625 °C/W requirement |
| MMBT3904LT1G (ON Semiconductor) | Lower hFE (100–300), lower VCEO (40 V), same SOT23 package | Used in cost-sensitive consumer electronics where 45 V rating and tighter gain binning are non-critical | Choose only if design tolerates reduced voltage headroom and wider gain variation |
Compared with BC817-25LT1G and MMBT3904LT1G, BC817-25W-7 offers superior thermal performance per unit area (SOT323), guaranteed automotive qualification, and tighter hFE distribution - making it optimal for space-constrained, thermally demanding, or automotive-grade applications.
Availability
BC817-25W-7 is available at Aetrix Electronics and suitable for automotive body electronics, USB-C power delivery interfaces, industrial sensor signal conditioning, and smart home power management requiring stable component supply and AEC-Q101 compliance.
Supply support for BC817-25W-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The BC817 series belongs to Diodes' broad portfolio of AEC-Q101-qualified small-signal transistors, engineered specifically for reliable switching and amplification in automotive, industrial, and computing applications where thermal efficiency and process consistency are critical.
FAQ
Is BC817-25W-7 pin-compatible with BC817-16W-7 or BC817-40W-7?
Yes - all BC817-W variants share identical SOT323 package, pinout (E-B-C), and absolute maximum ratings. Only DC current gain (hFE) differs: 100–250 (16W), 160–400 (25W), and 250–600 (40W). Substitution is electrically safe if gain requirements are met.
What is the maximum continuous power dissipation for BC817-25W-7 on a standard PCB?
200 mW at TA = +25 °C on a single-sided FR4 board with minimum recommended copper pad layout. Derating is required above +25 °C at 0.32 mW/°C (based on RθJA = 625 °C/W), limiting usable power to ~100 mW at +85 °C ambient.
Does BC817-25W-7 support reflow soldering per JEDEC J-STD-020?
Yes - its moisture sensitivity level is rated Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30 °C/60% RH and subjected to standard Pb-free reflow profiles (peak 260 °C) without baking or special handling.
Can BC817-25W-7 replace a BC847B in a circuit?
No - BC847B uses SOT23 package (different footprint), has higher VCEO (50 V), and different hFE range (200–450). While electrical specs partially overlap, mechanical incompatibility and subtle parameter differences (e.g., fT, RθJA) preclude direct substitution without layout and thermal validation.
BC817-25W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 160 @ 100mA, 1V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC817-25W-7 FAQ
1.How can I place an order for BC817-25W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-25W-7 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 BC817-25W-7 reliable?
The price and inventory of BC817-25W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-25W-7 is usually 5 days.
3.What payment methods are accepted for BC817-25W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-25W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-25W-7?
BC817-25W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-25W-7 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 BC817-25W-7?
For technical support, including BC817-25W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-25W-7 requirements.
6.How does Aetrix verify that BC817-25W-7 is sourced from the original manufacturer or authorized distributors?
All BC817-25W-7 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 BC817-25W-7 meets industry standards.
7.What is the process for return or replacement of BC817-25W-7?
All BC817-25W-7 units undergo pre-shipment inspection (PSI). If there is an issue with BC817-25W-7, 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 BC817-25W-7 part is unused and in its original packaging.
Return procedure for BC817-25W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-25W-7 Tags
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MMBT3906LT1G
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MMBT3904-7-F
Diodes Incorporated
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Diodes Incorporated
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Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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