My Inquiry
My Account
onsemi 2SC4217D
- Part No.:
- 2SC4217D
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-225AA, TO-126-3
- Datasheet:
-
2SC4217D.pdf
- Description:
- TRANS NPN 300V 0.2A TO-126ML
- Quantity:
- Payment:
- Shipping:
Inventory:440,800
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
2SC4217D from SANYO Semiconductor is an NPN triple diffused planar silicon transistor designed for chroma output and audio output stages in color TV systems. It features VCEO ≥ 300 V, IC = 200 mA (DC), PC = 1.5 W at Ta = 25°C, fT = 70 MHz, and TO-126ML micaless package for simplified thermal mounting.
For engineers reviewing the 2SC4217D datasheet, pinout, applications, or equivalent options, key selection criteria include high-voltage switching capability (300 V), DC current gain classification (Rank D: hFE = 60–120 at IC = 10 mA), saturation voltage (VCE(sat) = 0.6 V @ IC = 20 mA/IB = 2 mA), and thermal performance in compact consumer video/audio power amplification circuits.
Technical Context
The 2SC4217D operates as a medium-power NPN switching and linear amplifier transistor with triple diffusion process ensuring stable hFE distribution across Rank D (60–120). Its 300 V VCBO and VCEO ratings support high-voltage signal swing in chroma driver and horizontal deflection auxiliary stages.
Designed for ambient-temperature operation up to 150°C junction temperature, it delivers 70 MHz gain-bandwidth product and low output capacitance (Cob = 3.5 pF @ VCB = 50 V), enabling stable RF-capable response in analog video output paths without oscillation risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 300 V - Supports full-swing chroma signal handling in color TV CRT driver circuits without breakdown. |
| hFE (Rank D) | 60–120 @ VCE = 10 V, IC = 10 mA - Enables predictable biasing and gain control in fixed-gain output stages. |
| fT | 70 MHz - Ensures adequate bandwidth for composite video and chroma subcarrier frequencies (3.58 MHz) with margin. |
| VCE(sat) | 0.6 V @ IC = 20 mA, IB = 2 mA - Minimizes conduction loss and self-heating in Class-A/B audio output drivers. |
| Cob | 3.5 pF @ VCB = 50 V, f = 1 MHz - Reduces high-frequency feedback and stabilizes amplifier stage phase response. |
| PC (Ta=25°C) | 1.5 W - Allows direct PCB mounting without heatsink in low-duty-cycle video output applications. |
| Tj max | 150 °C - Permits reliable operation in enclosed TV chassis with limited airflow and elevated ambient temperatures. |
Pinout & Package
Package: TO-126ML - Micaless plastic power package with integrated heat-transfer base, optimized for direct-mount thermal conduction to PCB copper pour or small heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-impedance return path; carries full load current in common-emitter configuration. |
| 2 (Collector) | High-voltage output node | Drives chroma transformer primary or audio output transformer; rated for 300 V continuous blocking. |
| 3 (Base) | Control input | Receives current-limited drive signal; requires ~2 mA for full saturation at 20 mA collector load. |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage blocking | VCEO ≥ 300 V enables safe use in CRT-based color TV chroma output with flyback-induced transients. |
| Micaless TO-126ML package | Eliminates insulating washer requirement, reducing thermal resistance and assembly steps in mass-produced TV sets. |
| hFE rank classification (D) | Guaranteed 60–120 gain range simplifies production binning and eliminates need for individual gain trimming. |
| Low Cob (3.5 pF) | Minimizes Miller effect in high-gain video stages, preserving bandwidth and preventing instability at subcarrier frequencies. |
Applications
| Color TV Chroma Output Stage | TV Audio Output Driver |
|---|---|
Use Scenario: Amplifying 3.58 MHz chroma signal before feeding CRT yoke or chroma delay line in analog color television receivers. IC Role / Device Role / Timing Role: Linear NPN amplifier in common-emitter configuration, delivering low-distortion RF signal with high-voltage swing. Use Value: 300 V rating withstands horizontal retrace transients; 70 MHz fT ensures flat response across chroma band; low Cob prevents phase shift-induced color bleeding. | Use Scenario: Driving speaker transformer or low-impedance audio load in monaural TV sound output stage. IC Role / Device Role / Timing Role: Medium-power Class-A/B audio output transistor, biased for minimal crossover distortion. Use Value: VCE(sat) = 0.6 V reduces power loss and thermal stress; hFE rank D ensures consistent gain across production units for stable volume calibration. |
| Video Monitor Chroma Amplifier | Legacy CRT Display Horizontal Deflection Auxiliary |
Use Scenario: Boosting chroma signal amplitude in professional broadcast monitors requiring precise color fidelity. IC Role / Device Role / Timing Role: Final-stage chroma buffer amplifier operating in linear region with fixed DC bias. Use Value: 150°C Tj max supports sealed monitor enclosures; 3.5 pF Cob maintains subcarrier integrity over long cable runs. | Use Scenario: Supporting horizontal deflection circuitry by driving auxiliary timing or clamp functions in CRT display systems. IC Role / Device Role / Timing Role: High-voltage switch for pulse generation or clamping in horizontal scan timing chain. Use Value: 300 V VCBO rating tolerates flyback spikes; TO-126ML mechanical robustness withstands vibration in industrial displays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-voltage audio/video output transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SC3838 | VCEO = 250 V (lower), hFE = 80–160 (wider spread), fT = 60 MHz | Limited to lower-voltage CRT designs; less suitable for 300 V transient-prone chroma outputs | Select only if system VCE stress remains below 220 V and gain consistency is less critical. |
| 2SC4027 | VCEO = 300 V (same), hFE = 100–200 (Rank E), Cob = 4.0 pF | Better gain matching for precision audio but higher output capacitance may affect chroma phase margin | Prefer for audio-dominant designs; verify stability with chroma load impedance and layout parasitics. |
Compared with 2SC4217D, 2SC3838 offers broader hFE tolerance but reduced voltage margin, while 2SC4027 matches voltage rating and improves gain consistency at the cost of slightly higher Cob-making 2SC4217D optimal for balanced chroma/audio dual-role TV output stages where both 300 V robustness and 3.5 pF stability are required.
Availability
2SC4217D is available at Aetrix Electronics and suitable for color TV chroma output, CRT monitor audio drivers, and legacy display horizontal deflection auxiliary circuits requiring stable component supply and long-term obsolescence management.
Supply support for 2SC4217D 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
SANYO Semiconductor Co., Ltd. was a Japanese semiconductor manufacturer specializing in analog, power, and consumer electronics ICs and discrete devices before its acquisition by ON Semiconductor in 2011.
The 2SC4217D belongs to SANYO's legacy high-voltage bipolar transistor family engineered specifically for analog video signal processing and CRT-based television output stages.
FAQ
What is the hFE range for the 2SC4217D transistor?
The 2SC4217D is classified as Rank D, with DC current gain (hFE) specified from 60 to 120 when measured at VCE = 10 V and IC = 10 mA. This binned gain range ensures predictable biasing in production TV sets and eliminates the need for manual gain adjustment during manufacturing. The 2SC4217D's hFE consistency supports stable chroma output amplitude across large batch volumes.
Does the 2SC4217D require a mica insulator when mounted to a heatsink?
No, the 2SC4217D uses the TO-126ML package, which is explicitly designed as a micaless variant. Its molded plastic case provides electrical isolation between the collector (pin 2) and mounting surface, allowing direct screw-down attachment to grounded metal heatsinks or PCB copper areas without additional insulation. This feature reduces thermal resistance and simplifies assembly in high-volume TV production lines using the 2SC4217D.
What is the maximum allowable collector current for continuous operation of the 2SC4217D?
The 2SC4217D supports a maximum continuous collector current (IC) of 200 mA at ambient temperature (Ta) = 25°C. At higher ambient temperatures or under pulsed conditions, it allows up to 400 mA peak (ICP) with 1 ms pulse width and 10% duty cycle. Exceeding 200 mA DC without derating risks exceeding the 1.5 W ambient-rated power dissipation and thermal runaway-critical to observe in chroma output designs using the 2SC4217D.
Can the 2SC4217D be used in place of the 2SC4217 (unranked) version?
Yes, the 2SC4217D is a gain-binned variant of the base 2SC4217, with guaranteed hFE = 60–120. While the generic 2SC4217 may exhibit wider gain variation (40–200), the 2SC4217D ensures tighter matching for production-critical applications like TV chroma output. No PCB or schematic changes are needed-the 2SC4217D shares identical pinout, voltage ratings, and package dimensions with the base part.
What is the typical output capacitance (Cob) of the 2SC4217D and why does it matter?
The 2SC4217D has a typical output capacitance (Cob) of 3.5 pF at VCB = 50 V and f = 1 MHz. This low value minimizes Miller multiplication in high-gain video amplifier stages, preserving bandwidth and preventing phase shift that could cause chroma signal distortion or instability near the 3.58 MHz subcarrier frequency. Maintaining this Cob level is essential for accurate color reproduction in systems relying on the 2SC4217D.
2SC4217D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-225AA, TO-126-3
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 200 mA
- Voltage - Collector Emitter Breakdown (Max):
- 300 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 2mA, 20mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 60 @ 10mA, 10V
- Power - Max:
- 1.5 W
- Frequency - Transition:
- 70MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-126ML
2SC4217D FAQ
1.How can I place an order for 2SC4217D through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SC4217D 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 2SC4217D reliable?
The price and inventory of 2SC4217D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC4217D is usually 5 days.
3.What payment methods are accepted for 2SC4217D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC4217D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SC4217D?
2SC4217D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SC4217D 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 2SC4217D?
For technical support, including 2SC4217D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC4217D requirements.
6.How does Aetrix verify that 2SC4217D is sourced from the original manufacturer or authorized distributors?
All 2SC4217D 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 2SC4217D meets industry standards.
7.What is the process for return or replacement of 2SC4217D?
All 2SC4217D units undergo pre-shipment inspection (PSI). If there is an issue with 2SC4217D, 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 2SC4217D part is unused and in its original packaging.
Return procedure for 2SC4217D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
2SC4217D 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
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
