My Inquiry
My Account
onsemi KSA1015YTA
- Part No.:
- KSA1015YTA
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
KSA1015YTA.pdf
- Description:
- TRANS PNP 50V 0.15A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,505
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
KSA1015YTA from onsemi is a PNP epitaxial silicon transistor designed for low-frequency amplifier and switching applications, with −50 V collector-base voltage (VCBO), −150 mA continuous collector current (IC), and DC current gain (hFE) of 120–240 at IC = −2 mA. It is housed in a TO-92 3-lead package and serves as a complement to the NPN KSC1815 in push-pull or differential pair circuits.
For engineers reviewing the KSA1015YTA datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, −50 V breakdown ratings, 400 mW power dissipation, TO-92 mechanical compatibility, and hFE classification Y (120–240) - critical for bias stability in audio preamplifier stages and relay drivers.
Technical Context
The KSA1015YTA operates as a general-purpose PNP bipolar junction transistor optimized for linear amplification below 100 MHz, with fT = 80 MHz ensuring adequate bandwidth for audio and low-speed switching. Its low noise figure (0.5–6 dB at 100 Hz) and tight hFE binning support consistent gain matching in discrete amplifier pairs.
Thermal performance is defined by RJA = 312 °C/W on standard FR-4 PCB (76 mm × 114 mm), requiring derating above 25 °C at 3.2 mW/°C. The device supports safe operation up to TJ = 150 °C and storage from −55 °C to +150 °C, meeting industrial ambient requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | PNP bipolar junction transistor (BJT), not MOSFET or FET |
| VCBO / VCEO | −50 V - enables use in −48 V telecom line interface and −24 V industrial control rails |
| IC (max) | −150 mA - supports driving small relays, LEDs, or logic-level translators |
| hFE (Y-class) | 120–240 at VCE = −6 V, IC = −2 mA - ensures predictable DC bias in emitter-follower configurations |
| VCE(sat) | −0.1 to −0.3 V at IC = −100 mA, IB = −10 mA - minimizes conduction loss in saturated-switch applications |
| fT | 80 MHz - sufficient for audio amplification and sub-10 MHz signal conditioning |
| Cob | 4–7 pF at VCB = −10 V - limits high-frequency coupling in multi-stage amplifiers |
Pinout & Package
Package: TO-92 3-lead, case 135AR, lead-formed, Pb-free, dimensions 4.83 mm × 4.76 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal for PNP operation | Connected to most positive rail in common-emitter switch or amplifier stage |
| 2 (Collector) | Current source terminal | Typically tied to load and negative supply; voltage swing limited to −50 V max |
| 3 (Base) | Control input for minority-carrier injection | Requires negative base current relative to emitter to turn on; hFE binning affects required drive level |
Key Features
| Feature | Design Value |
|---|---|
| Low-frequency amplifier grade | Optimized for audio and DC-coupled signal paths with stable hFE and low NF |
| Complementary pairing with KSC1815 | Enables matched PNP/NPN operation in Class-A/B output stages without gain skew |
| TO-92 mechanical standardization | Ensures drop-in replacement across legacy designs using industry-standard through-hole footprint |
| Pb-Free, RoHS-compliant construction | Meets EU Directive 2011/65/EU and halogen-free/BFR-free requirements for industrial end equipment |
Applications
| Audio Preamp Stage | Relay Driver Circuit |
|---|---|
Use Scenario: Discrete two-stage audio amplifier front-end in battery-powered portable mixers. IC Role / Device Role / Timing Role: PNP BJT configured in common-emitter topology for voltage gain and impedance transformation. Use Value: hFE bin Y (120–240) ensures consistent gain across units; low Cob (4–7 pF) prevents high-frequency roll-off in 20 Hz–20 kHz band. | Use Scenario: Driving 12 V, 40 mA coil relay from microcontroller GPIO with open-collector interface. IC Role / Device Role / Timing Role: Saturated PNP switch sinking current from relay coil to ground. Use Value: VCE(sat) ≤ −0.3 V at −100 mA reduces power loss to < 30 mW; −50 V VCEO withstands inductive kickback. |
| Differential Pair Amplifier | Level Translation Interface |
Use Scenario: Input stage of instrumentation amplifier with matched PNP/NPN transistors. IC Role / Device Role / Timing Role: One leg of complementary differential pair providing balanced gain and common-mode rejection. Use Value: Complementarity to KSC1815 enables matched thermal drift and hFE tracking; tight hFE binning improves CMRR > 80 dB. | Use Scenario: Converting 3.3 V logic-high signal to −5 V active-low enable for legacy analog subsystem. IC Role / Device Role / Timing Role: Inverting level shifter with emitter-follower output configuration. Use Value: VEBO = −5 V allows direct connection to −5 V rail; VBE(sat) ≤ −1.1 V ensures full logic swing compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP BJT amplifier and switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| KSA1015GR | Higher hFE bin (200–400) at same test conditions; otherwise identical electrical and mechanical specs | Better suited for high-gain, low-drive applications like microphone preamps where base current must be minimized | Select KSA1015GR when higher DC gain is required without changing layout or bias network |
| MPSA92 | Higher VCBO (−300 V), lower hFE (25–250), TO-92 package, but not Pb-free/RoHS-compliant per original spec | Preferred in high-voltage AC line sensing or flyback snubber circuits where breakdown margin is critical | Choose MPSA92 only if −300 V rating is mandatory and RoHS exemption is approved for target application |
Compared with KSA1015GR and MPSA92, the KSA1015YTA offers balanced hFE (120–240), guaranteed RoHS compliance, and optimal noise performance for audio-grade amplification - making it the preferred choice where gain consistency, regulatory compliance, and low-noise operation intersect.
Availability
KSA1015YTA is available at Aetrix Electronics and suitable for audio preamplifier design, relay driver implementation, and differential pair amplifier development requiring stable component supply and legacy TO-92 footprint continuity.
Supply support for KSA1015YTA 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering power management, analog, sensor, and discrete solutions for automotive, industrial, and cloud infrastructure markets.
The KSA1015YTA belongs to onsemi's general-purpose bipolar transistor product line, engineered for reliability and parametric consistency in cost-sensitive, high-volume linear and switching applications.
FAQ
What is the pin configuration of the KSA1015YTA?
The KSA1015YTA uses a TO-92 package with standardized pinout: Pin 1 is Emitter, Pin 2 is Collector, and Pin 3 is Base - verified per onsemi's marking diagram and mechanical drawing CASE 135AR. This configuration is consistent across all KSA1015 variants including KSA1015YTA, KSA1015GRTA, and KSA1015OTA.
Is the KSA1015YTA RoHS compliant?
Yes, the KSA1015YTA is explicitly marked Pb-Free, Halogen Free/BFR Free, and RoHS compliant per onsemi's datasheet revision 3 (November 2025). Compliance is confirmed in the Features section and ordering information, with "(Pb-Free)" noted in the package description for KSA1015YTA.
What does the 'Y' in KSA1015YTA signify?
The 'Y' in KSA1015YTA denotes the hFE gain bin classification: 120–240 at VCE = −6 V and IC = −2 mA. This is distinct from 'GR' (200–400) and 'O' (70–140) bins. The full part number KSA1015YTA identifies both the device family and its specific DC current gain range.
Can KSA1015YTA replace KSA1015GRTA in existing designs?
Yes, KSA1015YTA can replace KSA1015GRTA electrically and mechanically - both share identical TO-92 packaging, absolute maximum ratings, and thermal characteristics. The only difference is hFE bin (Y vs. GR); verify bias network stability if the original design relied on higher minimum hFE (200).
What is the maximum power dissipation of KSA1015YTA?
The KSA1015YTA has a total device dissipation (PD) of 400 mW at TA = 25 °C, with thermal derating of 3.2 mW/°C above that temperature. This value is measured on a standard FR-4 PCB (76 mm × 114 mm × 1.57 mm) per onsemi's thermal characterization note.
KSA1015YTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 150 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 10mA, 100mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 120 @ 2mA, 6V
- Power - Max:
- 400 mW
- Frequency - Transition:
- 80MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
KSA1015YTA FAQ
1.How can I place an order for KSA1015YTA through Aetrix?
Please submit a Request for Quotation (RFQ) for KSA1015YTA 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 KSA1015YTA reliable?
The price and inventory of KSA1015YTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSA1015YTA is usually 5 days.
3.What payment methods are accepted for KSA1015YTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSA1015YTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSA1015YTA?
KSA1015YTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSA1015YTA 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 KSA1015YTA?
For technical support, including KSA1015YTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSA1015YTA requirements.
6.How does Aetrix verify that KSA1015YTA is sourced from the original manufacturer or authorized distributors?
All KSA1015YTA 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 KSA1015YTA meets industry standards.
7.What is the process for return or replacement of KSA1015YTA?
All KSA1015YTA units undergo pre-shipment inspection (PSI). If there is an issue with KSA1015YTA, 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 KSA1015YTA part is unused and in its original packaging.
Return procedure for KSA1015YTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KSA1015YTA 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…
