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onsemi KSA1015GRTA
- Part No.:
- KSA1015GRTA
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
KSA1015GRTA.pdf
- Description:
- TRANS PNP 50V 0.15A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,614
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Product details
Overview
KSA1015GRTA from ON Semiconductor (formerly Fairchild) is a PNP epitaxial silicon transistor designed for low-frequency amplifier and switching applications. It features VCBO = -50 V, VCEO = -50 V, IC = -150 mA, hFE = 70–400 (graded by GR classification), and TO-92 3L package. It serves as a complement to KSC1815 in dual-transistor amplifier stages and bias networks.
For engineers reviewing the KSA1015GRTA datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, -50 V breakdown ratings, DC current gain range at two operating points, saturation voltage under defined drive conditions, and thermal dissipation capability in TO-92 packaging.
Technical Context
The KSA1015GRTA operates as a general-purpose PNP bipolar junction transistor with fixed emitter-base and collector-base junction structures optimized for linear amplification below 80 MHz (fT). Its hFE is specified at two collector current levels (-2 mA and -150 mA), indicating stable gain across signal and switching regimes.
It exhibits low noise figure (0.5–6 dB at 100 Hz), tight Cob variation (4–7 pF), and predictable VCE(sat) (-0.1 to -0.3 V) and VBE(sat) (-1.1 V) under IC = -100 mA / IB = -10 mA conditions - enabling reliable use in analog front-ends and discrete logic interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | PNP epitaxial silicon BJT - enables current sinking, level-shifting, and complementary pair operation with NPN devices like KSC1815 |
| VCBO / VCEO | -50 V - supports operation in circuits with up to 50 V negative rail headroom without breakdown |
| IC Max | -150 mA - suitable for medium-current driver stages, relay drivers, and preamp loads |
| hFE Range | 70–400 (GR grade) - allows design flexibility in biasing and gain-setting without external feedback |
| VCE(sat) | -0.1 to -0.3 V @ IC = -100 mA, IB = -10 mA - ensures low conduction loss in saturated switch mode |
| fT | 80 MHz - supports audio and low-speed digital signal amplification with adequate bandwidth margin |
| PD | 400 mW @ TA = 25°C - defines maximum continuous power handling on standard FR-4 PCBs |
Pinout & Package
Package: TO-92 3L - molded plastic through-hole package with 0.200″ lead spacing, standardized for manual assembly and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current exit terminal; connected to most negative potential in PNP operation; determines bias reference point |
| 2 | Collector | Current entry terminal; typically tied to negative supply rail in common-emitter amplifier configurations |
| 3 | Base | Control terminal; requires reverse-biased drive (relative to emitter) to turn on; governs current amplification |
Key Features
| Feature | Design Value |
|---|---|
| Complementary Pairing | Explicitly designed as PNP counterpart to KSC1815 NPN transistor - enables matched differential pairs and push-pull output stages |
| Low-Noise Amplification | Noise figure of 0.5–6 dB at 100 Hz supports high-fidelity audio preamplifier designs where signal integrity is critical |
| Graded hFE Options | GR classification (hFE = 200–400) provides tighter gain distribution for production consistency in gain-critical circuits |
| Thermal Derating | 3.2 mW/°C derating above 25°C enables predictable power handling on standard PCB layouts without heatsinking |
| Low Saturation Voltage | VCE(sat) ≤ -0.3 V ensures minimal voltage drop and power loss when used as a saturated switch in battery-powered systems |
Applications
| Audio Preamp Stage | Discrete Logic Inverter |
|---|---|
Use Scenario: Low-noise voltage amplification in microphone preamplifiers and line-level signal conditioning circuits. IC Role / Device Role / Timing Role: PNP BJT configured in common-emitter topology to provide inverted, gain-stable amplification with minimal added noise. Use Value: 0.5–6 dB noise figure and 70–400 hFE enable clean signal boosting before ADC conversion without requiring complex feedback networks. | Use Scenario: Level translation and inversion in legacy TTL or discrete gate-based control logic. IC Role / Device Role / Timing Role: Saturated-switch BJT acting as active-low inverter with defined VCE(sat) and fast turn-off due to low Cob (4–7 pF). Use Value: Predictable -0.1 to -0.3 V saturation voltage and 80 MHz fT support reliable switching up to ~10 MHz with consistent propagation delay. |
| Relay Driver Circuit | Complementary Output Pair |
Use Scenario: Driving electromagnetic relays in industrial control panels and appliance power management modules. IC Role / Device Role / Timing Role: Medium-current PNP switch sinking relay coil current from positive rail to ground via emitter-follower or common-emitter configuration. Use Value: -150 mA IC rating and -50 V VCEO allow direct interface with 24 V DC coils while maintaining safe voltage margin and thermal headroom. | Use Scenario: Push-pull output stage in Class-A/B audio amplifiers or precision current sources. IC Role / Device Role / Timing Role: PNP half of complementary pair matched to KSC1815 NPN, sharing identical TO-92 footprint and thermal characteristics. Use Value: Complementarity ensures symmetrical gain, offset, and thermal drift - critical for minimizing crossover distortion in analog output stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPSA92 | Higher VCBO (-300 V), lower hFE (25–200), same TO-92 package | Better suited for high-voltage switching (e.g., flyback snubbers); less ideal for low-noise gain stages | Select MPSA92 only when >100 V breakdown is required; KSA1015GRTA preferred for audio and matched-pair use |
| BC557B | Lower IC (-100 mA), similar hFE (200–450), same TO-92 package | Marginally lower current drive; widely available but lacks explicit complement pairing with NPN counterpart | Choose BC557B for cost-sensitive, non-matched applications; KSA1015GRTA remains optimal where KSC1815 pairing or GR-grade hFE is needed |
Compared with MPSA92 and BC557B, the KSA1015GRTA offers a balanced combination of breakdown voltage, gain grading, noise performance, and intentional complementarity - making it uniquely suited for audio amplification and matched-pair circuitry where symmetry and low-noise operation are prioritized over extreme voltage or cost minimization.
Availability
KSA1015GRTA is available at Aetrix Electronics and suitable for audio preamplifiers, relay drivers, discrete logic inverters, and complementary output stages requiring stable component supply and consistent GR-grade hFE distribution.
Supply support for KSA1015GRTA 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 (formerly Fairchild Semiconductor) is a global leader in energy-efficient semiconductor solutions, specializing in power management, analog, sensors, and discrete devices.
The KSA1015GRTA belongs to ON Semiconductor's legacy general-purpose bipolar transistor product line, engineered specifically for low-frequency analog amplification, switching, and complementary pair implementation in cost-sensitive industrial and consumer electronics.
FAQ
What is the pin configuration of the KSA1015GRTA?
The KSA1015GRTA uses a TO-92 3L package with pin 1 as Emitter, pin 2 as Collector, and pin 3 as Base - verified per Fairchild KSA1015 Rev. 1.9 datasheet Figure 7 and physical dimension diagrams. This configuration is standardized across all KSA1015 variants including KSA1015GRTA and is essential for correct orientation during PCB layout and assembly.
What does the 'GR' suffix in KSA1015GRTA indicate?
'GR' denotes the hFE classification grade: KSA1015GRTA has a DC current gain (hFE1) of 200–400 at VCE = -6 V and IC = -2 mA. This tighter gain band improves consistency in production amplifiers and bias networks compared to 'O' (70–140) or 'Y' (120–240) grades - a specification explicitly defined in the KSA1015 Rev. 1.9 datasheet.
Is KSA1015GRTA a direct replacement for KSA1015YTA?
Yes - KSA1015GRTA and KSA1015YTA share identical electrical specifications, TO-92 3L package, and absolute maximum ratings; they differ only in hFE grade (GR vs. Y) and packing method (ammo vs. ammo). Both are manufactured by ON Semiconductor and fully interchangeable where the higher hFE range of GR is acceptable or preferred.
Does KSA1015GRTA support audio-frequency amplification?
Yes - the KSA1015GRTA is explicitly characterized for low-frequency amplifier use with fT = 80 MHz, NF = 0.5–6 dB at 100 Hz, and stable hFE across IC = -2 mA to -150 mA. These parameters confirm suitability for audio preamplifier, tone control, and line-driver applications as stated in the "Features" section of the KSA1015 Rev. 1.9 datasheet.
What is the maximum power dissipation of KSA1015GRTA at 75°C ambient?
At TA = 75°C, KSA1015GRTA's maximum power dissipation is 240 mW: calculated as PD(25°C) − (derating × ΔT) = 400 mW − (3.2 mW/°C × 50°C) = 240 mW. This value is derived directly from the Thermal Characteristics table in the KSA1015 Rev. 1.9 datasheet and reflects safe continuous operation on standard FR-4 PCBs without forced cooling.
KSA1015GRTA 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:
- Obsolete
- 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:
- 200 @ 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
KSA1015GRTA FAQ
1.How can I place an order for KSA1015GRTA through Aetrix?
Please submit a Request for Quotation (RFQ) for KSA1015GRTA 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 KSA1015GRTA reliable?
The price and inventory of KSA1015GRTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSA1015GRTA is usually 5 days.
3.What payment methods are accepted for KSA1015GRTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSA1015GRTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSA1015GRTA?
KSA1015GRTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSA1015GRTA 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 KSA1015GRTA?
For technical support, including KSA1015GRTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSA1015GRTA requirements.
6.How does Aetrix verify that KSA1015GRTA is sourced from the original manufacturer or authorized distributors?
All KSA1015GRTA 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 KSA1015GRTA meets industry standards.
7.What is the process for return or replacement of KSA1015GRTA?
All KSA1015GRTA units undergo pre-shipment inspection (PSI). If there is an issue with KSA1015GRTA, 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 KSA1015GRTA part is unused and in its original packaging.
Return procedure for KSA1015GRTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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