About us Contact Us Submit BOM
RFQs(0)
English
Close Menu
View All

Please refer to the English Version as our Official Version.Return

Europe
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Czech(Čeština) Luxembourg(Lëtzebuergesch) Netherlands(Nederland) Iceland(íslenska) Hungarian(Magyarország) Spain(español) Portugal(Português) Turkey(Türk dili) Bulgaria(Български език) Ukraine(Україна) Greece(Ελλάδα) Israel(עִבְרִית) Sweden(Svenska) Finland(Svenska) Finland(Suomi) Romania(românesc) Moldova(românesc) Slovakia(Slovenská) Denmark(Dansk) Slovenia(Slovenija) Slovenia(Hrvatska) Croatia(Hrvatska) Serbia(Hrvatska) Montenegro(Hrvatska) Bosnia and Herzegovina(Hrvatska) Lithuania(lietuvių) Spain(Português) Switzerland(Deutsch) United Kingdom(English)
Asia/Pacific
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Vietnam(Tiếng Việt) Philippines(Pilipino)
Africa, India and Middle East
United Arab Emirates(العربية) Iran(فارسی) Tajikistan(فارسی) India(हिंदी) Madagascar(malaɡasʲ)
South America / Oceania
New Zealand(Maori) Brazil(Português) Angola(Português) Mozambique(Português)
North America
United States(English) Canada(English) Haiti(Ayiti) Mexico(español)
HomeProductsIntegrated Circuits (ICs)Specialized ICsKTA1543T-RTK/P
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

KTA1543T-RTK/P -

Manufacturer Part Number
KTA1543T-RTK/P
Manufacturer
Allelco Part Number
32D-KTA1543T-RTK/P
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
8,690 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
Compare
Our certification
In stock: 8690

Required fields are indicated by an asterisk (*)
Please send RFQ, we will respond immediately.

Quantity

Specifications

KTA1543T-RTK/P Tech Specifications
- KTA1543T-RTK/P technical specifications, attributes, parameters and parts with similar specifications to - KTA1543T-RTK/P

Product Attribute Attribute Value
Part Number KTA1543T-RTK/P
Package DAC91001
Description DAC91001
Stock Condition Get 8690 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 -
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)

What are the key electrical characteristics of the KTA1543T-RTK/P transistor that influence its use in power management circuits?
The KTA1543T-RTK/P operates with a collector current (Ic) of up to 1.5 A and a maximum collector-emitter saturation voltage (Vce(sat)) of approximately 0.6 V at 500 mA, which directly affects conduction losses in switching applications. Its DC current gain (hFE) ranges from 80 to 320 depending on collector current, enabling effective amplification in low-power control stages. With a transition frequency (ft) of 300 MHz, it supports high-speed signal processing, making it suitable for RF or PWM-driven loads. These parameters collectively determine efficiency and thermal performance in linear and switching configurations.
How does the KTA1543T-RTK/P compare to the KTA1542T-RTK/P in terms of gain and current handling for motor control designs?
The KTA1543T-RTK/P offers a slightly higher maximum collector current rating (1.5 A vs. 1.2 A) and marginally improved gain characteristics compared to the KTA1542T-RTK/P, which typically has an Ic(max) of 1.2 A and similar hFE range. While both devices share the same SOT-23 package and similar ft, the KTA1543T-RTK/P is better suited for applications requiring sustained higher load currents, such as driving medium-duty motors or LED arrays. However, the difference in Vce(sat) is minimal, so thermal considerations remain comparable unless duty cycles exceed 70%.
Can the KTA1543T-RTK/P be safely used in high-temperature environments without derating?
Operating the KTA1543T-RTK/P above 150°C junction temperature requires careful attention to thermal design due to its relatively modest power dissipation capability of 350 mW in the SOT-23 package. Without a heatsink, continuous operation near maximum current may lead to thermal runaway if ambient temperatures exceed 85°C. For reliable long-term performance in automotive or industrial settings, a conservative current derating—such as limiting Ic to 800 mA at 100°C ambient—is recommended to ensure margin against failure modes.
What layout considerations are critical when integrating the KTA1543T-RTK/P into a compact PCB design?
Due to its SOT-23 packaging, the KTA1543T-RTK/P occupies limited board space but demands attention to trace routing and thermal vias. To minimize parasitic inductance and reduce turn-on delays, keep the collector and emitter leads as short as possible. Place decoupling capacitors within 5 mm of the base connection to suppress high-frequency oscillations. Additionally, avoid placing sensitive analog traces adjacent to the power stage to prevent coupling through ground loops or radiated noise.
Is the KTA1543T-RTK/P suitable for driving inductive loads such as relays or solenoids?
Yes, the KTA1543T-RTK/P can drive inductive loads like relays when paired with an appropriate flyback diode. Its moderate switching speed and sufficient peak current make it adequate for small to medium solenoid valves or contactor coils. However, due to its relatively slow storage time compared to specialized switching transistors, snubber networks may be needed at higher frequencies (>10 kHz) to prevent voltage spikes from damaging the device or nearby components.
How does the leakage current of the KTA1543T-RTK/P impact performance in battery-powered systems?
At room temperature, the reverse leakage current between collector and emitter (Iceo) is typically below 1 µA, which is negligible in most low-power applications. However, under elevated temperatures (e.g., 125°C), this value may increase by an order of magnitude, potentially affecting standby power consumption in portable devices. In ultra-low-power designs, using a MOSFET instead of the KTA1543T-RTK/P might offer superior off-state performance, though the BJT remains acceptable for intermittent duty cycles.
What are the limitations of using the KTA1543T-RTK/P in high-frequency switching converters?
Although the KTA1543T-RTK/P has an ft of 300 MHz, its practical utility in buck or boost converters is constrained by slow turn-off characteristics and significant base charge storage. Switching losses become dominant above 50 kHz unless driven with aggressive base turn-off currents. Therefore, while feasible for lower-frequency applications (<10 kHz), dedicated power transistors or MOSFETs are preferred for efficient high-frequency conversion due to lower gate/collector capacitance and faster dv/dt tolerance.
How should the KTA1543T-RTK/P be selected for LED dimming circuits requiring PWM control?
The KTA1543T-RTK/P is well-suited for PWM-based LED dimming up to 1.5 A per channel, provided the duty cycle does not approach 100% continuously. Its low Vce(sat) minimizes power loss during on-time, improving efficiency. To maintain brightness consistency and avoid visible flicker, ensure PWM frequency exceeds 200 Hz. Drive the base with sufficient current (typically 5–20 mA depending on hFE) to saturate quickly; otherwise, extended conduction delays will distort waveform edges and reduce effective resolution.

Customers Also Interested in

Recommended Products

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.

Write a Review

Your Email address will not be published.

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.
Quality Inspection
Quality Inspection Image - 01
Quality Inspection Image - 02
Quality Inspection Image - 03
Quality Inspection Image - 04

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
  • HKBea
  • Paypal
  • MasterCard
  • Western-Union
  • VISA
Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner
  • Efficient Supply Management
  • Cost-Saving Procurement
  • Fast Sourcing & Delivery
Contact us if you have any questions.

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

KTA1543T-RTK/P


32D-KTA1543T-RTK/P

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

Allelco
About Us
History
Certifications
Recruitment
Policies
Terms & Conditions
Privacy Policy
Cookie Policy
Services
Order Tracking
Return & Replacement
Frequently Asked Questions
Contact Us
Order
Shipping & Delivering
Payment Methods
My Account
The BlogsHot PartsChange LanguageNewsSite map
Contact Us
Headquarters Address:
Room C 13/F Harvard Commercial Building
105-111 Thomson Road Wan Chai
HongKong
Service Tel: +852-91464856
Service Email: info@allelco.com
Follow us
Copyright © 2012-2025 AllelcoElec.com. All rights reserved.
0 RFQ
Shopping cart (0 Items)
It is empty.
Submit RFQ
Compare List (0 Items)
It is empty.
Feedback

Your feedback matters! At Allelco, we value the user experience and strive to improve it constantly.
Please share your comments with us via our feedback form, and we'll respond promptly.
Thank you for choosing Allelco.

Subject
E-mail
Comments
Captcha
Drag or click to upload file
Upload File
types: .xls, .xlsx, .doc, .docx, .jpg, .png and .pdf.
Max file size: 10MB