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onsemi KA7806E
- Part No.:
- KA7806E
- Manufacturer:
- onsemi
- Package:
- TO-220-3
- Datasheet:
-
KA7806E.pdf
- Description:
- IC REG LINEAR 6V 1A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,801
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Product details
Overview
KA7806E from ON Semiconductor is a fixed-output +6 V, 1 A positive linear voltage regulator in TO-220 package, featuring thermal overload protection, short-circuit protection, and safe operating area (SOA) protection. It delivers stable DC power for industrial control logic, embedded microcontroller supply rails, and analog sensor interfaces requiring low-noise, regulated 6 V.
For engineers reviewing the KA7806E datasheet, pinout, applications, or equivalent options, this page provides verified electrical specifications, package dimensions, real-world use cases, and validated alternative parts for design-in and sourcing decisions.
Technical Context
The KA7806E implements a classic three-terminal series pass architecture with internal error amplifier, reference voltage generator, current-limiting circuitry, and thermal shutdown. Its SOA protection actively limits power dissipation during transient overloads to prevent junction failure.
It operates across –40°C to +125°C junction temperature range with input voltage support up to 35 V (for VO = 6 V), dropout voltage of 2 V at 1 A, and ripple rejection of 59–75 dB at 120 Hz - enabling robust performance in noisy AC/DC-derived supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 6.00 V ±3% (5.70–6.30 V over full load/line/temp range); ensures compatibility with 6 V logic and analog circuits. |
| Max Output Current | 1 A continuous; supports moderate-power loads like relays, op-amps, and MCU peripherals without external boost. |
| Dropout Voltage | 2 V at 1 A, 25°C; requires minimum 8 V input for reliable 6 V output under full load. |
| Ripple Rejection | 59–75 dB at 120 Hz; suppresses rectified AC ripple in unregulated wall adapters and SMPS post-regulation stages. |
| Quiescent Current | 5–8 mA; enables efficient operation in always-on systems where standby power matters. |
| Thermal Protection | Internal thermal shutdown activates before junction exceeds safe limit; prevents catastrophic failure during sustained overload. |
| Short-Circuit Current | 250 mA typical; limits fault current to protect upstream components and PCB traces during output shorts. |
Pinout & Package
KA7806E is housed in a TO-220 (dual-gauge) package with standard 3-pin configuration and metal tab electrically connected to GND for heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Input) | Unregulated DC input | Accepts 8–21 V input per spec; must be decoupled with ≥0.33 μF ceramic capacitor close to pin. |
| 2 (GND) | Ground reference | Common return path for input, output, and internal bias; metal tab is internally tied to this pin. |
| 3 (Output) | Regulated +6 V output | Delivers stable 6 V to load; requires ≥0.1 μF ceramic output capacitor for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +6 V output | Eliminates external resistor network; simplifies BOM and layout for dedicated 6 V rail generation. |
| 1 A continuous output | Sufficient for powering multiple ICs (e.g., 8-bit MCUs, comparators, level shifters) without parallel devices. |
| Thermal & short-circuit protection | Enables self-protecting operation in field-deployed equipment without external foldback or fusing. |
| Low output noise (45 μV RMS) | Supports noise-sensitive analog functions such as precision ADC references and low-level signal conditioning. |
| Wide operating temperature (–40°C to +125°C) | Validated for automotive under-hood, industrial motor controls, and outdoor embedded systems. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering digital isolators, optocouplers, and 6 V logic buffers in modular I/O cards. IC Role / Device Role / Timing Role: Primary 6 V local supply regulator delivering clean, protected power to interface circuitry. Use Value: Eliminates need for custom LDO design while ensuring reliability under ESD and load dump transients. |
Use Scenario: Supplying 6 V to window lift controllers, mirror actuators, and interior lighting drivers. IC Role / Device Role / Timing Role: Fixed-voltage regulator providing stable rail for motor driver logic and CAN transceiver bias. Use Value: Withstands automotive temperature extremes and load dump surges up to 35 V input without latch-up. |
| Legacy Instrumentation Power | Embedded Sensor Node |
Use Scenario: Replacing aging 7806 regulators in test equipment power supplies with identical footprint. IC Role / Device Role / Timing Role: Drop-in compatible voltage regulator maintaining legacy 6 V system architecture. Use Value: Pin-to-pin and electrical drop-in replacement for KA7806E/KA7806ETU variants in repair and obsolescence mitigation. |
Use Scenario: Powering 6 V analog front-ends (e.g., strain gauge amplifiers, RTD interfaces) in battery-backed nodes. IC Role / Device Role / Timing Role: Low-noise, thermally protected regulator supplying precision analog circuitry. Use Value: 45 μV output noise and –0.8 mV/°C drift enable sub-0.1% measurement accuracy over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM7806CDT/NOPB | TI part; same 6 V output, 1 A rating, TO-220 package; ±2% initial tolerance vs. KA7806E's ±5% (6.00 V min/max 5.70–6.30 V). | Higher initial accuracy suits tighter-tolerance analog rails; slightly lower quiescent current (4.5–7.5 mA). | Select LM7806CDT/NOPB when output voltage stability over production lot is critical; verify thermal derating curves match your heatsink. |
| MC7806CTG | ON Semiconductor part; identical electrical specs and TO-220 package; shares same Fairchild heritage and qualification profile. | No functional difference; fully interchangeable in design and manufacturing; supported by ON Semi's long-term supply program. | Prefer MC7806CTG for new designs seeking guaranteed long-term availability and unified documentation under ON Semi branding. |
Compared with LM7806CDT/NOPB and MC7806CTG, the KA7806E offers proven ruggedness in high-temp industrial environments and direct legacy compatibility with existing Fairchild-based schematics, while MC7806CTG provides seamless continuity under ON Semi's extended product lifecycle management.
Availability
KA7806E is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and legacy instrumentation requiring stable component supply and long-term manufacturability.
Supply support for KA7806E 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The KA7806E belongs to the KA78XXE series of fixed-output linear regulators designed for cost-sensitive, high-reliability applications where simplicity, thermal resilience, and proven field performance outweigh programmability or ultra-low quiescent current.
FAQ
What is the maximum input voltage for KA7806E?
The KA7806E supports a maximum input voltage of 35 V when regulating to 6 V output, as specified in its Absolute Maximum Ratings table. This allows safe operation with unregulated 24 VAC-derived supplies or automotive systems experiencing load dump transients. Always ensure adequate heatsinking when operating near max VI and IO simultaneously to avoid thermal shutdown.
Does KA7806E require external capacitors?
Yes, KA7806E requires an input capacitor (≥0.33 μF ceramic) and output capacitor (≥0.1 μF ceramic) per the datasheet test circuit. These stabilize regulation, improve transient response, and suppress high-frequency noise. Omitting them may cause oscillation or poor line/load regulation, especially with long PCB traces or high-impedance sources.
Is KA7806E pin-compatible with other 78xx-series regulators?
Yes - KA7806E uses the industry-standard TO-220 3-pin configuration (Input-GND-Output) shared by all 78xx-family regulators. It is physically and electrically pin-compatible with LM7806, MC7806CTG, and other 6 V variants, enabling direct substitution in existing layouts without PCB changes.
What protection features does KA7806E include?
KA7806E integrates three key protections: thermal overload shutdown (activates before junction damage), short-circuit current limiting (250 mA typical), and safe operating area (SOA) protection that dynamically restricts power dissipation during voltage/current transients. These operate autonomously without external components.
Can KA7806E be used in adjustable configurations?
While KA7806E is optimized as a fixed 6 V regulator, it can be adapted for adjustable output using external resistive feedback networks - though this voids guaranteed specs and requires careful validation. For true adjustable operation, ON Semiconductor recommends dedicated LDOs like NCV8674 or MC78M06.
KA7806E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 35V
- Voltage - Output (Min/Fixed):
- 6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 8 mA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
KA7806E FAQ
1.How can I place an order for KA7806E through Aetrix?
Please submit a Request for Quotation (RFQ) for KA7806E 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 KA7806E reliable?
The price and inventory of KA7806E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KA7806E is usually 5 days.
3.What payment methods are accepted for KA7806E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KA7806E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KA7806E?
KA7806E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KA7806E 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 KA7806E?
For technical support, including KA7806E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KA7806E requirements.
6.How does Aetrix verify that KA7806E is sourced from the original manufacturer or authorized distributors?
All KA7806E 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 KA7806E meets industry standards.
7.What is the process for return or replacement of KA7806E?
All KA7806E units undergo pre-shipment inspection (PSI). If there is an issue with KA7806E, 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 KA7806E part is unused and in its original packaging.
Return procedure for KA7806E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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