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 ICsKTA1504Y
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

KTA1504Y - KEC

Manufacturer Part Number
KTA1504Y
Manufacturer
KEC
Allelco Part Number
32D-KTA1504Y
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
8,020 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
Compare
Our certification
In stock: 8020
  • Unit Price: $0.012
  • Subtotal: $0.00

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

Quantity Unit Price Ext. Price
20+ $0.012 $0.24
200+ $0.01 $2.00
600+ $0.008 $4.80
3000+ $0.008 $24.00
9000+ $0.007 $63.00
21000+ $0.007 $147.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

KTA1504Y Tech Specifications
KEC - KTA1504Y technical specifications, attributes, parameters and parts with similar specifications to KEC - KTA1504Y

Product Attribute Attribute Value
Part Number KTA1504Y
Package DAC91001
Description DAC91001
Stock Condition Get 8020 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 KTA1504Y’s collector current rating compare to other PNP transistors in the same SOT-23 package when driving inductive loads in low-voltage switching circuits?
The KTA1504Y supports a maximum continuous collector current of 150mA, which is typical for small-signal PNP devices in SOT-23. While some complementary NPN counterparts like the MMBT3904 can handle similar currents, few PNP alternatives in this footprint offer both 50V VCEO and 150mW power dissipation at that current level. For inductive loads below 100mA, this device provides sufficient margin with built-in ESD protection, though external flyback diodes are still recommended to prevent voltage spikes beyond its 300mV saturation voltage.
What are the thermal limitations of the KTA1504Y when used continuously near its maximum collector current in compact PCB layouts without heatsinking?
With a power dissipation limit of 150mW and a junction-to-ambient thermal resistance (RθJA) around 250°C/W for standard SOT-23 layouts, the KTA1504Y cannot sustain 150mA indefinitely under elevated ambient temperatures. At 25°C board temperature, continuous operation at 100mA already approaches derating limits. Engineers should limit duty cycle or improve airflow; otherwise, self-heating reduces gain and increases leakage current, potentially affecting circuit stability over time.
Can the KTA1504Y be used as a replacement for higher-gain PNP transistors in precision analog amplifier stages where β variation impacts bias accuracy?
The KTA1504Y has a DC current gain of 70 at 2mA and 6V, which is moderate compared to specialized linear amplifiers. Due to relatively wide β spread across temperature and production batches, it introduces more bias point uncertainty than matched-pair devices. In high-accuracy applications requiring consistent transconductance, alternative transistors with tighter hFE specifications would be preferable unless emitter degeneration is employed to stabilize performance.
How does the transition frequency (fT = 80MHz) of the KTA1504Y affect its suitability for RF signal conditioning versus general-purpose digital switching?
At 80MHz fT, the KTA1504Y can amplify or switch signals up to several MHz reliably but exhibits increasing phase lag and reduced gain above 20–30MHz. This makes it suitable for audio-band filtering, sensor interface buffering, and slow microcontroller-driven logic—not ideal for RF mixers or broadband communication stages. Its capacitive input characteristics also limit high-speed edge response, so rise times may exceed expectations in fast digital paths without base termination.
What risks exist when operating the KTA1504Y near its maximum VCE voltage (50V) in unregulated power supply environments?
Although rated for 50V VCEO, the device’s avalanche energy capability is not specified, meaning repeated transient overshoots close to this limit can degrade long-term reliability. In battery-powered systems or motor control circuits with inductive kickback, parasitic inductance can generate voltage spikes exceeding safe levels. Designers must ensure clamp circuitry or layout practices keep transients well below 40V to avoid cumulative stress on the collector-base junction.
How do the leakage current (ICBO = 100nA) and Vebo (5V) ratings influence use cases involving high-impedance sensor interfaces?
The 100nA cutoff current is sufficiently low for most sensor applications, including thermocouples or photodiodes, where signal levels are microvolt-to-milliamp range. However, the 5V emitter-base breakdown voltage requires careful biasing: if the base floats near ground while the emitter swings negative due to input offset, reverse breakdown could occur. Proper pull-up resistors and voltage headroom management are essential to maintain integrity during cold starts or fault conditions.
Is the KTA1504Y suitable for driving LEDs or relay coils directly, given its saturation voltage of 300mV at 100mA?
Yes, but efficiency considerations apply. At 100mA, the 300mV VCE(sat) results in only 0.3V drop across the transistor, meaning minimal power loss—about 30mW. However, this implies the base drive must be strong enough to force deep saturation for full turn-on. Without adequate Ib (typically >10x Ic / hFE), the device remains in active mode, increasing conduction losses and heat. For 150mA loads, base current must exceed 2–3mA assuming worst-case β of 50.
How does the operating temperature range (-55°C to +150°C) impact selection for automotive or industrial edge-computing modules exposed to rapid thermal cycling?
The extended range allows deployment in harsh environments, but the plastic SOT-23 package may exhibit mechanical stress during repeated thermal cycles. While the semiconductor itself remains functional, solder joint fatigue becomes a concern after thousands of cycles between -55°C and +125°C+. Engineers should verify board-level reliability via accelerated life testing, especially if mounted near hot components or subjected to vibration. Hermetic packaging or alternative leadframes might be needed for mission-critical designs.
What design precautions are necessary when paralleling multiple KTA1504Y transistors to increase current handling in linear regulator output stages?
Paralleling small-signal transistors like the KTA1504Y without individual emitter resistors leads to current hogging due to slight β mismatches. Even minor differences cause one device to carry disproportionately more current, risking localized overheating and failure. Each unit should have a small emitter resistor (e.g., 1Ω–5Ω) to balance sharing. Additionally, thermal coupling helps, but shared heatsinking or forced airflow improves stability under load transients.
How does the RoHS compliance status of the KTA1504Y affect procurement strategy in EU-based manufacturing lines subject to REACH regulations?
RoHS compliance confirms absence of restricted substances such as lead, mercury, cadmium, and certain brominated flame retardants. This simplifies compliance documentation for end products destined for European markets. Since the KTA1504Y is marked RoHS-compliant, manufacturers avoid additional testing costs and delays associated with hazardous material screening, streamlining certification processes for medical, consumer, and automotive electronics meeting IEC 62321 standards.
Can the KTA1504Y safely interface with 3.3V logic outputs from modern microcontrollers in active-low configuration without external level shifting?
Yes, provided the microcontroller pin can source sufficient base current. Assuming worst-case β of 50 and desired Ic = 50mA, required Ib ≈ 1mA. A 3.3V logic output driving a 1kΩ base resistor yields ~3.3mA, which is adequate. The 5V Vebo rating ensures no breakdown occurs even if the emitter is pulled slightly above 3.3V by leakage paths. However, marginal designs may benefit from adding a pull-down resistor at the base to ensure clean turn-off during floating periods.
How does the tape-and-reel packaging affect automated assembly yield when integrating the KTA1504Y into high-volume PCBA production?
Tape-and-reel (TR) packaging enables efficient pick-and-place processing, reducing manual handling errors and improving throughput in surface-mount lines. Standard reel dimensions conform to IPC-7351 guidelines, ensuring compatibility with common feeders. However, moisture sensitivity level (MSL) must be verified—if Class 1 or 2, dry storage and baking may be required before reflow. Most distributors provide MSL data alongside part numbers, aiding factory planning.
What are the implications of the unspecified detailed description field in the datasheet for system-level debugging or failure analysis?
Absence of a detailed description suggests limited internal documentation beyond standard parameters. During post-failure analysis, engineers may lack insight into secondary breakdown thresholds, safe operating area (SOA) curves, or ESD protection structures. When critical reliability is required, supplemental qualification reports or contact with JSCJ for application notes could mitigate uncertainty. Otherwise, conservative margins based on measured VCE(sat), fT, and Pd remain advisable.
How does the single-device configuration (“Number: 1 PNP”) impact integration into dual-transistor ICs or Darlington pairs compared to multi-chip solutions?
As a discrete component, the KTA1504Y occupies one channel in space-constrained designs but lacks built-in matching or thermal compensation. When used alongside another PNP (e.g., in push-pull configurations), layout symmetry becomes crucial to minimize skew. It cannot replicate integrated Darlington gains or current mirror precision found in BICs, so discrete implementations require more careful biasing and layout discipline to achieve stable performance over temperature.
What trade-offs exist between using the KTA1504Y versus a MOSFET in battery-powered IoT nodes requiring low quiescent current switching?
The KTA1504Y draws negligible gate/base current, similar to MOSFETs, but exhibits higher conduction losses at high currents due to VCE(sat) vs. RDS(on). However, for intermittent loads under 100mA, the simplicity and cost of a BJT outweigh MOSFET advantages unless efficiency is paramount. Additionally, BJTs respond faster to analog signals without Miller capacitance effects, making them preferable for PWM-driven actuators with soft edges.
How should the KTA1504Y be handled during prototyping if stored in humid environments prior to use?
Standard JEDEC MSL classifications apply. If unopened storage exceeds 168 hours above 30°C/60% RH, baking at 125°C for 24 hours is recommended before soldering. Once opened, assembly should occur within 12 weeks under controlled humidity (<10% RH). Using conformal coating post-assembly further protects against condensation-induced shorts. These precautions prevent popcorn cracking and ensure long-term solder joint integrity in mass-production scenarios.
Can the KTA1504Y operate reliably in boost converter freewheeling paths where reverse recovery effects might stress the junction?
Boost converters rely on freewheel current through passive elements; the KTA1504Y does not act as a synchronous rectifier but may serve as a control switch. In freewheel modes, the transistor conducts discontinuous inductor current with zero voltage across collector-emitter during off-time. Since VCE remains low when conducting, and the device isn’t exposed to diode reverse recovery spikes directly, it functions adequately—provided peak currents stay within 150mA and duty cycles don’t induce excessive switching losses.
What role does the 80MHz transition frequency play in determining maximum usable bandwidth for current feedback loops in active filter designs?
In transimpedance amplifier topologies using the KTA1504Y as an active element, the fT sets an upper bound on closed-loop bandwidth. Assuming unity-gain stability and typical compensation, usable bandwidth rarely exceeds fT divided by 5–10. Thus, effective loop response tops out around 8–16MHz. For audio or instrumentation filters, this is more than sufficient, but RF front-end applications would require specialized bipolar transistors with GHz-range fT.

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • 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.

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

KTA1504Y

KEC
32D-KTA1504Y

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