My Inquiry
My Account
Diodes Incorporated FCX658ATA
- Part No.:
- FCX658ATA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
FCX658ATA.pdf
- Description:
- TRANS NPN 400V 0.5A SOT-89-3
- Quantity:
- Payment:
- Shipping:
Inventory:18,921
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FCX658ATA from Diodes Incorporated is a 400V NPN high-voltage transistor in SOT89 package, rated for 500mA continuous collector current, with VCE(sat) ≤ 200mV at 100mA/10mA drive and BVCEO = 400V. It serves as a pre-driver in HID lamp ballasts and as a hook switch in modem SLIC circuits.
For engineers reviewing the FCX658ATA datasheet, FCX658ATA pinout, FCX658ATA application, or FCX658ATA equivalent, key selection criteria include high-voltage blocking (400V), low-saturation voltage under 100mA load, SOT89 thermal performance on FR4 PCB, and suitability for telecom line interface and automotive-qualified variants.
Technical Context
This NPN bipolar junction transistor operates with a minimum DC current gain (hFE) of 85 at 1mA/5V and maintains ≥35 at 200mA/10V. Its safe operating area supports 100ms pulses up to 0.5A at 100V, enabled by 5.7W power dissipation on 40mm×40mm copper.
Switching performance includes 130ns turn-on and 3300ns turn-off times under 100mA/100V conditions with ±20mA base drive. Output capacitance Cobo is 10pF at 20V, supporting moderate-frequency switching in line interface and ballast control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 400 V - Enables direct use in 277V AC line-derived supplies and telecom -48V to -300V ringing applications. |
| IC (continuous) | 500 mA - Supports sustained current in SLIC hook-switch and HID pre-driver stages without derating at +25°C. |
| VCE(sat) | 165 mV max @ 20mA/1mA - Minimizes conduction loss and self-heating in high-duty-cycle pre-driver operation. |
| hFE | 85–170 - Ensures reliable base drive margin across 1–200mA collector range for stable switching in analog-controlled ballasts. |
| fT | 50 MHz - Permits use in <10MHz switching nodes such as PWM-modulated lamp ignition circuits. |
| PD (large copper) | 5.7 W - Achievable on 40mm×40mm 1oz Cu PCB, enabling compact thermal design without heatsink in space-constrained modems. |
| toff | 3300 ns - Limits switching losses in <5kHz HID ballast pre-driver stages where fast turn-off is secondary to voltage robustness. |
Pinout & Package
Package: SOT89 - Surface-mount plastic package with exposed emitter tab for thermal conduction; 0.05g mass; UL 94V-0 molding compound; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (C) | High-voltage output node | Connected to 400V rail or transformer primary; carries full load current and withstands full VCEO stress. |
| Emitter (E) | Current return / thermal path | Exposed metal tab soldered to PCB copper pour; primary heat dissipation path for 5.7W capability. |
| Base (B) | Control input | Receives TTL- or microcontroller-compatible drive; requires 10mA for full saturation at 100mA IC. |
Key Features
| Feature | Design Value |
|---|---|
| 400V VCEO rating | Supports direct integration into telephone line interface cards (SLIC) and 277V AC-powered HID ballasts without external snubbers. |
| VCE(sat) ≤ 165mV @ 20mA | Reduces power loss to <3.3mW at light loads, critical for always-on modem hook-switch circuitry. |
| SOT89 thermal performance | Delivers 5.7W dissipation on standard FR4 PCB-eliminates need for discrete heatsinks in space-limited telecom modules. |
| AEC-Q101 qualification path | Manufactured in IATF 16949 facilities with PPAP capability, enabling drop-in use in automotive lighting control modules. |
| Halogen- & antimony-free | Meets <900ppm Br/Cl and <1000ppm Sb thresholds, satisfying strict environmental compliance for EU and global OEM programs. |
Applications
| Telephone Dialer Circuits | Modem Hook Switches |
|---|---|
Use Scenario: Detects off-hook condition and controls ring signal injection in PSTN-connected dialers. IC Role / Device Role / Timing Role: NPN switch isolating ring generator from subscriber line during active call. Use Value: 400V BVCEO withstands 170V peak ring voltage plus transients; low VCE(sat) minimizes insertion loss. | Use Scenario: Connects/disconnects local loop during modem handshake and data transmission. IC Role / Device Role / Timing Role: High-voltage line interface switch controlled by UART or GPIO. Use Value: 500mA IC handles 20–40mA loop current with margin; SOT89 footprint fits dense modem PCB layouts. |
| HID Lamp Ballast Pre-drivers | Subscriber Line Interface Cards (SLIC) |
Use Scenario: Drives gate of high-side MOSFET in resonant half-bridge ballast during lamp ignition phase. IC Role / Device Role / Timing Role: Current-amplifying stage between controller IC and power switch. Use Value: hFE ≥85 at 100mA ensures stable base drive; 3300ns toff aligns with 100–500kHz ignition timing. | Use Scenario: Implements battery feed, overvoltage protection, and ringing in central office line cards. IC Role / Device Role / Timing Role: High-voltage series pass element in feed circuit or ring cut-off switch. Use Value: 400V rating covers -300V ringing + 100V transients; 10pF Cobo limits capacitive loading on line impedance. |
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 |
|---|---|---|---|
| ZTX653 | VCEO = 300V, IC = 1A, SOT89, hFE = 100–800 | Limited to ≤300V systems; higher gain but lower voltage margin than FCX658ATA. | Select when higher hFE and 1A pulse current are prioritized over 400V blocking. |
| MJD122 | VCEO = 100V, IC = 8A, TO-252, hFE = 20–120 | Lower voltage rating; higher current and thermal mass; incompatible pinout and package. | Choose only for low-voltage, high-current industrial drivers where SOT89 size is not required. |
Compared with ZTX653 and MJD122, FCX658ATA uniquely balances 400V blocking, SOT89 compactness, and 500mA continuous rating-making it optimal for space-constrained telecom and lighting interfaces where voltage margin is non-negotiable.
Availability
FCX658ATA is available at Aetrix Electronics and suitable for telephone dialer circuits, modem hook switches, HID lamp ballast pre-drivers, and subscriber line interface cards requiring stable component supply and long-term manufacturability.
Supply support for FCX658ATA 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 the Americas.
The FCX658ATA belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for telecom infrastructure, lighting control, and industrial line-interface applications demanding robust voltage handling and reliable SMT assembly.
FAQ
What is the maximum allowable continuous collector current for FCX658ATA at +100°C ambient?
At +100°C ambient temperature, the FCX658ATA's continuous collector current must be derated to approximately 320mA based on its thermal resistance (RθJA ≈ 105°C/W on 15mm×15mm PCB) and 150°C maximum junction temperature. This ensures safe operation within SOA limits without exceeding TJ(max).
Does FCX658ATA support AEC-Q101 qualification?
The FCX658ATA is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While the base part is not pre-qualified, Diodes offers AEC-Q101-compliant versions (e.g., FCX658AQ) with full stress testing and automotive change control-contact Diodes or Aetrix for qualified variants.
Can FCX658ATA replace BCV61 in SLIC applications?
No-BCV61 is a dual NPN in SOT-363 with VCEO = 60V and IC = 100mA. FCX658ATA has 400V rating and 500mA capacity but is single-die in SOT89. Direct replacement requires board layout redesign and verification of base drive compatibility due to differing hFE curves and thermal behavior.
What is the recommended PCB pad layout for optimal thermal performance?
Use the official Diodes SOT89 pad layout (Document #AP02004) with ≥15mm² exposed copper connected to the emitter tab. Include at least four 0.3mm thermal vias under the tab, filled or plated, connecting to an internal ground plane. Maintain 0.2mm solder mask opening around the tab edge to ensure full solder wetting and minimal RθJC.
FCX658ATA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 400 V
- Vce Saturation (Max) @ Ib, Ic:
- 200mV @ 10mA, 100mA
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 35 @ 200mA, 10V
- Power - Max:
- 1 W
- Frequency - Transition:
- 50MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
FCX658ATA FAQ
1.How can I place an order for FCX658ATA through Aetrix?
Please submit a Request for Quotation (RFQ) for FCX658ATA 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 FCX658ATA reliable?
The price and inventory of FCX658ATA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FCX658ATA is usually 5 days.
3.What payment methods are accepted for FCX658ATA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FCX658ATA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FCX658ATA?
FCX658ATA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FCX658ATA 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 FCX658ATA?
For technical support, including FCX658ATA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FCX658ATA requirements.
6.How does Aetrix verify that FCX658ATA is sourced from the original manufacturer or authorized distributors?
All FCX658ATA 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 FCX658ATA meets industry standards.
7.What is the process for return or replacement of FCX658ATA?
All FCX658ATA units undergo pre-shipment inspection (PSI). If there is an issue with FCX658ATA, 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 FCX658ATA part is unused and in its original packaging.
Return procedure for FCX658ATA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FCX658ATA Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
