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Nexperia USA Inc. BF620,115
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- Part No.:
- BF620,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BF620,115.pdf
- Description:
- TRANS NPN 300V 0.05A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:413
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Product details
Overview
BF620 from Nexperia is an NPN high-voltage bipolar junction transistor in SOT89 (SC-62) surface-mount package, designed for video output stages requiring 300 V VCEO, 50 mA IC, and DC current gain ≥50 at 25 mA/20 V. It operates up to 150 °C junction temperature and delivers 600 mV VCE(sat) at 30 mA/5 mA drive.
For engineers reviewing the BF620 datasheet, BF620 pinout, BF620 application, or BF620 equivalent, this device serves as a discrete high-voltage switching element where low leakage (10 nA ICBO), stable hFE, and thermal robustness on FR4 PCBs are critical selection criteria.
Technical Context
The BF620 is a silicon planar epitaxial NPN transistor optimized for linear and switching operation in high-voltage analog signal paths. Its structure supports VCEO = 300 V and VCBO = 300 V with low feedback capacitance (1.6 pF Cre) and fT = 60 MHz, enabling stable performance in video frequency amplification.
Thermal design is defined by three mounting configurations: Rth(j-a) = 250 K/W (standard footprint), 156 K/W (1 cm² collector pad), and 113 K/W (6 cm² pad). Peak pulse capability reaches 100 mA ICM with 50 mA IBM base drive under 1 ms pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 300 V - Enables safe operation in video output circuits with high DC supply rails and transient spikes. |
| IC | 50 mA continuous - Supports moderate-power video driver stage loads without forced cooling. |
| hFE | ≥50 at 25 mA/20 V - Ensures predictable DC bias stability across production lots and temperature. |
| VCE(sat) | 600 mV max at 30 mA/5 mA - Minimizes conduction loss and self-heating during saturated switching. |
| Cre | 1.6 pF - Limits Miller effect distortion in wideband video amplifier feedback networks. |
| fT | 60 MHz - Validates usable bandwidth for composite video (up to ~5 MHz) with margin. |
| Rth(j-sp) | 30 K/W - Confirms efficient heat transfer from junction to solder point on standard PCB layout. |
Pinout & Package
SOT89 (SC-62) plastic surface-mount package: 3-lead, 1.5 mm pitch, 4.5 mm × 2.5 mm × 1.5 mm body; collector tab forms exposed thermal pad on lead 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Reference node for bias network; connects to ground or cathode return path in video output stage. |
| 2 | Collector | Main power output terminal; electrically and thermally coupled to PCB copper area for dissipation. |
| 3 | Base | Control input; requires current-limited drive (≤50 mA peak) to avoid saturation delay or thermal runaway. |
Key Features
| Feature | Design Value |
|---|---|
| High breakdown voltage | VCEO = VCBO = 300 V - Eliminates need for series stacking in CRT or legacy display driver supplies. |
| Low leakage current | ICBO ≤ 10 nA at 200 V/25 °C - Preserves DC operating point accuracy in high-impedance video coupling networks. |
| Controlled saturation behavior | VCE(sat) ≤ 600 mV at 30 mA/5 mA - Reduces power loss and thermal stress in Class-A/B video output stages. |
| Thermally optimized package | Rth(j-sp) = 30 K/W - Enables direct thermal coupling to PCB copper, supporting >1 W dissipation with 6 cm² pad. |
Applications
| Video Output Amplifier | CRT Display Driver |
|---|---|
Use Scenario: Amplifying composite video signals into 75 Ω coaxial transmission lines. IC Role / Device Role / Timing Role: NPN emitter-follower or common-emitter buffer stage delivering line-level current drive. Use Value: 300 V rating accommodates flyback-induced transients; 60 MHz fT ensures flat response through 5 MHz video bandwidth. |
Use Scenario: Driving deflection yoke or EHT multiplier circuits in analog CRT monitors. IC Role / Device Role / Timing Role: High-voltage horizontal output switch in quasi-resonant or linear sweep generators. Use Value: 300 V VCEO withstands retrace voltage spikes; low Cre minimizes timing jitter in scan waveform fidelity. |
| Legacy Broadcast Equipment | Industrial Video Signal Distribution |
Use Scenario: Signal conditioning in SDI-to-analog converters or broadcast test gear. IC Role / Device Role / Timing Role: DC-coupled video level shifter and impedance matcher between IC stages. Use Value: Stable hFE ≥50 ensures consistent gain across temperature; 150 °C Tj rating supports sealed chassis operation. |
Use Scenario: Long-line video buffering in security camera matrix switchers or industrial vision systems. IC Role / Device Role / Timing Role: Isolated video repeater stage compensating for cable attenuation and capacitive loading. Use Value: Low ICBO prevents drift in multi-stage DC-coupled chains; SOT89 package enables compact, repairable PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BF621 | PNP complement; identical VCEO, IC, and package but opposite polarity. | Used in complementary push-pull video output stages, not single-ended designs. | Select only when circuit topology requires PNP sourcing capability or symmetrical driver pairs. |
| BC639 | Lower VCEO = 80 V; higher IC = 1 A; TO-92 package; hFE = 40–160. | Suitable for low-voltage video preamps or logic interface, not high-voltage output stages. | Choose only if system rail voltage is <100 V and thermal constraints allow through-hole mounting. |
Compared with BF620, BF621 provides matched high-voltage PNP functionality for complementary designs, while BC639 trades voltage headroom for higher current and lower cost in non-high-voltage roles-neither is a drop-in replacement.
Availability
BF620 is available at Aetrix Electronics and suitable for video output amplifiers, CRT display drivers, legacy broadcast equipment, and industrial video signal distribution requiring stable component supply and long-term obsolescence management.
Supply support for BF620 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, industrial, and consumer power management and signal integrity solutions.
The BF620 belongs to Nexperia's high-voltage bipolar transistor product line, engineered specifically for analog video signal chain applications demanding robust voltage tolerance, low leakage, and thermal resilience in compact SMD formats.
FAQ
Is BF620 automotive-qualified?
No. The BF620 is explicitly marked as non-automotive qualified per its 2024 revision history. It lacks AEC-Q101 qualification, automotive-grade screening, and extended temperature validation beyond 150 °C junction. For automotive video systems, Nexperia offers separate -Q qualified alternatives such as the PBSS4041T.
What is the maximum allowable power dissipation at 75 °C ambient?
At 75 °C ambient, the BF620's maximum power dissipation is 800 mW when mounted on an FR4 PCB with standard footprint (Rth(j-a) = 250 K/W), derived from the derating curve in Figure 1. This assumes no additional heatsinking and accounts for thermal resistance increase above 25 °C.
Can BF620 replace BC548 in a video amplifier?
No. BC548 has VCEO = 30 V and IC = 100 mA, making it unsuitable for high-voltage video output stages. BF620's 300 V rating, lower current, and different hFE profile require full circuit re-biasing and layout review-no functional or pin-compatible substitution is valid.
What marking code identifies BF620 on the device body?
The BF620 is marked with "DC" on the top surface of the SOT89 package, as confirmed in Table 4 of the official Nexperia datasheet. This two-character code is laser-etched or molded and must be verified visually under magnification for authenticity.
BF620,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 50 mA
- Voltage - Collector Emitter Breakdown (Max):
- 300 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 5mA, 30mA
- Current - Collector Cutoff (Max):
- 10nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 50 @ 25mA, 20V
- Power - Max:
- 1.1 W
- Frequency - Transition:
- 60MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BF620,115 FAQ
1.How can I place an order for BF620,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BF620,115 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 BF620,115 reliable?
The price and inventory of BF620,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BF620,115 is usually 5 days.
3.What payment methods are accepted for BF620,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BF620,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BF620,115?
BF620,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BF620,115 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 BF620,115?
For technical support, including BF620,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BF620,115 requirements.
6.How does Aetrix verify that BF620,115 is sourced from the original manufacturer or authorized distributors?
All BF620,115 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 BF620,115 meets industry standards.
7.What is the process for return or replacement of BF620,115?
All BF620,115 units undergo pre-shipment inspection (PSI). If there is an issue with BF620,115, 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 BF620,115 part is unused and in its original packaging.
Return procedure for BF620,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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