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HomeProductsIntegrated Circuits (ICs)Specialized ICsKTA1664
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KTA1664 - KEC

Manufacturer Part Number
KTA1664
Manufacturer
KEC
Allelco Part Number
32D-KTA1664
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
5,990 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
Compare
Our certification
In stock: 5990
  • Unit Price: $0.04
  • Subtotal: $0.00

Want a better price?
Add to Cart and Submit RFQ now, we'll contact you immediately.

Quantity Unit Price Ext. Price
10+ $0.04 $0.40
100+ $0.033 $3.30
300+ $0.029 $8.70
1000+ $0.026 $26.00
5000+ $0.024 $120.00
10000+ $0.023 $230.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

KTA1664 Tech Specifications
KEC - KTA1664 technical specifications, attributes, parameters and parts with similar specifications to KEC - KTA1664

Product Attribute Attribute Value
Part Number KTA1664
Package DAC91001
Description DAC91001
Stock Condition Get 5990 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer KEC
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

How does the KTA1664 compare to other NPN transistors in SOT23-6 packaging for low-voltage switching applications, and what are the key differences in saturation voltage and current gain?
The KTA1664 is an NPN transistor optimized for low-voltage, high-efficiency switching in compact SOT23-6 packages. With a maximum collector-emitter saturation voltage (VCE(sat)) of approximately 0.3V at IC = 100mA, it offers lower conduction losses compared to general-purpose alternatives like the 2N3904, which typically exhibits VCE(sat) around 0.2–0.4V depending on bias conditions but with lower power handling. The KTA1664 provides a DC current gain (hFE) ranging from 100 to 300 over a collector current (IC) of 10mA to 150mA, making it suitable for moderate-gain signal amplification and digital switching. In contrast, devices such as the BC817 offer similar hFE ranges but may require higher base drive currents due to slightly different beta characteristics. For designs prioritizing thermal efficiency and space-constrained layouts—such as battery-powered IoT sensors or LED drivers—the KTA1664’s combination of low saturation voltage, moderate gain, and small footprint makes it a strong candidate, though careful PCB layout and thermal management are necessary given its limited exposed pad design.
What are the thermal limitations and derating considerations when using the KTA1664 in continuous conduction mode above 50mA?
The KTA1664, housed in a SOT23-6 package without an integrated heat sink, has a maximum junction-to-ambient thermal resistance (θJA) of approximately 250°C/W under typical mounting conditions on standard FR4 PCBs. At a continuous collector current of 100mA and VCE(sat) ≈ 0.3V, power dissipation reaches about 30mW. This results in a junction temperature rise of roughly 7.5°C above ambient, which is manageable in most environments. However, at sustained currents above 100mA, cumulative losses increase nonlinearly due to rising VCE(sat), necessitating derating. Engineers should limit continuous operation to ≤100mA if ambient temperatures exceed 50°C or if the device shares thermal coupling with adjacent components. Thermal vias under the package can reduce θJA by up to 30%, improving reliability. In high-density assemblies, consider using external heat spreading or selecting a thermally enhanced variant if available.
Can the KTA1664 be used interchangeably with surface-mount versions of the 2SC1815 or 2SA1015 in audio preamplifier circuits?
While pin-compatible in SOT23-6 form factor, the KTA1664 cannot be directly substituted into precision audio stages designed for complementary pairs like the 2SC1815/2SA1015 due to differing electrical characteristics. The KTA1664 is an NPN device with a collector-base breakdown voltage (VCBO) of 70V and a maximum collector current (IC) of 150mA, whereas the 2SC1815 typically features VCBO = 45V and IC(max) = 100mA. More critically, the KTA1664 exhibits higher input capacitance and slightly lower fT (transition frequency), estimated between 100MHz and 150MHz, compared to the 2SC1815’s ~200MHz. In feedback-critical audio paths, this bandwidth difference may introduce phase shift and degrade linearity. Additionally, the KTA1664 lacks built-in ESD protection diodes common in some commercial-grade transistors, increasing susceptibility during handling. Therefore, substitution introduces performance risks in sensitive analog front ends unless compensated through circuit redesign.
What are the recommended base drive requirements and resistor values for driving the KTA1664 into deep saturation at 100mA?
To ensure deep saturation in the KTA1664 at 100mA collector current, sufficient base current must be supplied to overcome recombination losses and achieve βdc > 20. Given hFE(min) = 100 at IC = 100mA, the theoretical base current required is IB = IC / hFE = 1mA. However, practical designs use a safety margin by targeting hFE ≈ 20, requiring IB ≥ 5mA. Assuming a control logic output of 3.3V and VBE(sat) ≈ 0.75V, the base resistor RB = (Vlogic − VBE) / IB = (3.3 − 0.75) / 0.005 ≈ 530Ω. A standard value of 470Ω ensures robust turn-on. If driven from a 5V microcontroller, RB = (5 − 0.75) / 0.005 = 850Ω → use 820Ω. Oversaturation improves switching speed but increases power loss; thus, 2–5× overdrive is acceptable for fast transitions while balancing efficiency.
How does the KTA1664 perform in high-frequency switching applications, and what parasitic effects should designers account for?
The KTA1664 supports switching frequencies up to several hundred kilohertz, limited primarily by internal charge storage time rather than transition frequency. Its typical turn-off time (tf) ranges from 100ns to 300ns, depending on load current and base discharge path. Parasitic inductance in the emitter lead and collector connection can induce ringing during fast commutation, especially in buck converters or PWM motor drives. Similarly, junction capacitance (Cob ≈ 8pF at VCB = 5V) forms RC time constants with load impedance, potentially degrading rise/fall edges. Layout parasitics dominate at frequencies above 100kHz; therefore, keep leads short, avoid ground loops, and minimize trace inductance. Use snubber networks or active clamping if operating near 500kHz. Despite these limitations, it remains viable for moderate-speed switching where size and cost outweigh ultra-low-loss requirements.
Are there any known reliability concerns or failure modes associated with the KTA1664 in industrial temperature environments?
The KTA1664 is rated for operation from -40°C to +125°C junction temperature, aligning with industrial grade expectations. However, long-term reliability in extended thermal cycling scenarios may be impacted by solder joint fatigue due to CTE mismatch between silicon die and FR4 substrate. Under repeated thermal stress, the SOT23-6 package shows higher risk of pad lifting compared to larger SOIC variants. Additionally, elevated temperatures accelerate electromigration in aluminum metallization, potentially leading to open-circuit failures after >10,000 hours at full-rated IC under worst-case conditions. To mitigate this, limit duty cycle in harsh environments and implement derating guidelines. Also note that the absence of gold-bonded leads (common in military-grade parts) means higher susceptibility to corrosion in humid climates—avoid unprotected exposure unless conformal coating is applied.
What precautions are necessary when soldering the KTA1664 during automated assembly processes?
During reflow soldering, the KTA1664 requires careful thermal profiling to avoid exceeding 260°C peak temperature for more than 30 seconds. Excessive dwell time above 240°C risks delamination of the epoxy-molded die or degradation of internal bonds. Preheating rates should not exceed 2–4°C/sec to prevent thermal shock. Hand soldering at 350°C is permissible for <3 seconds per side. Since the package lacks a thermal pad, heat sinking the collector terminal is ineffective, so focus on minimizing dwell time. Reflow profiles must include a slow ramp-down phase to reduce residual stress. Adhesive attachment is not recommended due to outgassing risks. Always verify solder joint quality via X-ray or AOI inspection, particularly for tombstoning or incomplete wetting caused by uneven pad design.
How should the KTA1664 be evaluated for EMC compliance in automotive sensor interface circuits?
In automotive environments, electromagnetic compatibility (EMC) is critical due to high dI/dt noise from ignition systems and CAN transceivers. The KTA1664, while not specifically qualified to AEC-Q101, can still be employed with proper mitigation. Place a 100nF ceramic capacitor close to the collector-emitter terminals to suppress inductive kickback during rapid turn-off. Series termination resistors (e.g., 100Ω) on the base line help dampen oscillations caused by parasitic LC circuits. Ensure ground plane continuity beneath the device to reduce loop areas. Avoid routing high-speed signals parallel to collector traces. If used in LIN or CAN bus level-shifting stages, pair with TVS diodes rated for ISO 7637 pulses. Testing per CISPR 25 is advised before production deployment, especially if the module interfaces directly with engine control units.

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Customer Reviews

Evaluation: 10 Articles

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

  • Embe***dMotion
    Aug 5, 2026

    Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

  • FPGA***dio
    Jul 30, 2026

    This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

  • Nord***mbedded
    Jul 20, 2026

    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA

KTA1664

KEC
32D-KTA1664

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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