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onsemi KSA812OMTF
- Part No.:
- KSA812OMTF
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
KSA812OMTF.pdf
- Description:
- TRANS PNP 50V 0.1A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,912
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Product details
Overview
KSA812OMTF from ON Semiconductor is a PNP epitaxial silicon transistor in SOT-23 package, rated for -50 V VCEO, -100 mA IC, and 150 mW PC, with hFE range 90–180 (Grade O), optimized for low-frequency amplifier and switching applications in portable audio and power management circuits.
For engineers reviewing the KSA812OMTF datasheet, pinout, applications, or equivalent options, key selection criteria include its complementary pairing with KSC1623, guaranteed hFE binning (O grade), low VCE(sat) of -0.3 V at -100 mA/-10 mA, fT of 180 MHz, and SOT-23 footprint compatibility with space-constrained designs.
Technical Context
The KSA812OMTF operates as a general-purpose PNP bipolar junction transistor with fixed emitter-base and collector-base junction structures, supporting linear amplification and saturated switching modes. Its DC current gain is specified across IC = -1 mA to -100 mA, and it maintains stable Cob = 4.5 pF at VCB = -10 V, enabling predictable high-frequency behavior in bias networks.
Designed for discrete analog signal conditioning, the device features a maximum junction temperature of 150°C and storage range of -55°C to +150°C, ensuring reliability in consumer and industrial ambient environments. Its VBE(on) of -0.62 V (typ) at IC = -1 mA supports accurate base drive calculation in emitter-follower or common-emitter configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -50 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration |
| IC | -100 mA - Continuous collector current rating defining usable output drive capability |
| PC | 150 mW - Power dissipation limit at TA = 25°C, constraining thermal design in SOT-23 |
| hFE (O grade) | 90–180 - Guaranteed DC current gain range at VCE = -6 V, IC = -1 mA for consistent biasing |
| VCE(sat) | -0.3 V (max) at IC = -100 mA, IB = -10 mA - Low saturation voltage enabling efficient switching |
| fT | 180 MHz - Current gain bandwidth product indicating usable frequency limit for small-signal amplification |
| Cob | 4.5 pF at VCB = -10 V - Output capacitance affecting high-frequency stability and Miller effect |
Pinout & Package
SOT-23 plastic surface-mount package with gull-wing leads, 1.90 mm × 1.30 mm body size, 0.95 mm height, and standard 1.9 mm lead pitch. Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector (viewed from top, marking side up, leads down).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control electrode | Receives input current to modulate collector-emitter conduction; requires current-limiting resistor in most driver circuits |
| 2 (Emitter) | Current source terminal | Connected to higher potential in PNP operation; serves as reference node for bias network and load return path |
| 3 (Collector) | Output current terminal | Delivers amplified/saturated current to load; polarity must be negative relative to emitter for forward-active mode |
Key Features
| Feature | Design Value |
|---|---|
| Complementary pair to KSC1623 | Enables balanced push-pull or differential amplifier stages with matched thermal and gain characteristics |
| O-grade hFE binning | Guaranteed 90–180 hFE eliminates need for post-manufacture sorting in production assemblies |
| Low VCE(sat) | -0.3 V max ensures minimal power loss and heat generation during switching in battery-powered systems |
| 180 MHz fT | Supports audio-band amplification and RF pre-driver functions without external compensation |
| SOT-23 footprint | Enables high-density PCB layouts and compatibility with automated pick-and-place assembly processes |
Applications
| Portable Audio Amplifiers | DC-DC Converter Bias Circuits |
|---|---|
Use Scenario: Low-voltage headphone driver stage in Bluetooth earbuds requiring compact, low-power amplification. IC Role / Device Role / Timing Role: PNP small-signal amplifier in common-emitter configuration providing voltage gain and impedance matching. Use Value: O-grade hFE ensures consistent gain across units; SOT-23 footprint saves board space in ultra-thin form factors. | Use Scenario: Feedback loop transistor in buck converter error amplifier, regulating output voltage precision. IC Role / Device Role / Timing Role: Discrete PNP used in op-amp output stage or level-shifting circuit for PWM controller interface. Use Value: -50 V VCEO accommodates wide input voltage ranges; low VCE(sat) minimizes offset errors in feedback path. |
| LED Driver Switches | Industrial Sensor Signal Conditioning |
Use Scenario: High-side current switch controlling indicator LEDs in programmable logic controllers. IC Role / Device Role / Timing Role: Saturated PNP switch turning on/off LED strings via emitter-follower configuration. Use Value: -100 mA IC rating supports multi-LED loads; -0.3 V VCE(sat) reduces thermal stress and improves efficiency. | Use Scenario: Transimpedance amplifier front-end stage converting photodiode current to voltage in optical sensors. IC Role / Device Role / Timing Role: Low-noise PNP BJT in common-base configuration for wideband current-to-voltage conversion. Use Value: 4.5 pF Cob limits bandwidth degradation; 180 MHz fT preserves signal integrity up to 100 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT3906LT1G | Same SOT-23 package; hFE range 100–300 (no grade binning); VCEO = -40 V; PC = 310 mW | Lower voltage rating limits use in >40 V rails; higher power dissipation allows higher IC derating | Select when wider hFE tolerance is acceptable and VCEO < -40 V suffices |
| PN2907A | TO-92 package; VCEO = -60 V; IC = -600 mA; PC = 625 mW; no hFE grading | Through-hole mounting only; higher current/power but incompatible with SMT automation | Select for prototyping or high-current legacy designs where manual assembly is acceptable |
Compared with MMBT3906LT1G and PN2907A, the KSA812OMTF offers guaranteed O-grade hFE (90–180) and -50 V VCEO in an SOT-23 package-making it optimal for production-grade, space-constrained, low-voltage PNP amplification where parameter consistency matters more than raw power handling.
Availability
KSA812OMTF is available at Aetrix Electronics and suitable for portable audio amplifiers, DC-DC converter bias circuits, and LED driver switches requiring stable component supply, consistent hFE binning, and SOT-23 footprint compatibility.
Supply support for KSA812OMTF 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 is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensor, and logic solutions for automotive, industrial, and consumer markets.
The KSA812OMTF belongs to ON Semiconductor's legacy discrete bipolar transistor portfolio, originally developed by Fairchild Semiconductor to serve low-frequency amplifier and switching needs in cost-sensitive, space-constrained applications.
FAQ
What is the pin configuration of the KSA812OMTF?
The KSA812OMTF uses a standard SOT-23 package with Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector (top view, marking side up). This configuration is confirmed in the official ON Semiconductor datasheet Rev. A1 and matches industry-standard PNP SOT-23 orientation for reliable PCB layout and assembly.
Does the KSA812OMTF have a guaranteed hFE range?
Yes, the KSA812OMTF is graded as "O" with a guaranteed hFE range of 90–180 at VCE = -6 V and IC = -1 mA. This binning is explicitly defined in the datasheet's hFE Classification table and ensures predictable DC bias performance without post-production sorting.
Is the KSA812OMTF a direct replacement for the Fairchild KSA812?
Yes, the KSA812OMTF is the ON Semiconductor–branded continuation of the Fairchild KSA812, retaining identical electrical specifications, SOT-23 package, pinout, and O-grade hFE binning. The "OMTF" suffix denotes tape-and-reel packaging per ON Semiconductor's updated nomenclature post-Fairchild integration.
What is the maximum operating temperature for the KSA812OMTF?
The KSA812OMTF has a maximum junction temperature (TJ) of 150°C and a storage temperature range of -55°C to +150°C. These ratings are specified in the Absolute Maximum Ratings table and define thermal limits for continuous operation and long-term reliability under typical PCB copper pour and airflow conditions.
How does the KSA812OMTF compare to NPN counterparts like the KSC1623?
The KSA812OMTF is explicitly designed as the PNP complement to the NPN KSC1623, sharing matched VCEO, IC, and fT ratings to enable symmetrical push-pull or differential amplifier designs. Their paired use ensures balanced gain, thermal tracking, and simplified bias network design in analog signal chains.
KSA812OMTF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 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:
- 90 @ 1mA, 6V
- Power - Max:
- 150 mW
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
KSA812OMTF FAQ
1.How can I place an order for KSA812OMTF through Aetrix?
Please submit a Request for Quotation (RFQ) for KSA812OMTF 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 KSA812OMTF reliable?
The price and inventory of KSA812OMTF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSA812OMTF is usually 5 days.
3.What payment methods are accepted for KSA812OMTF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSA812OMTF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSA812OMTF?
KSA812OMTF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSA812OMTF 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 KSA812OMTF?
For technical support, including KSA812OMTF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSA812OMTF requirements.
6.How does Aetrix verify that KSA812OMTF is sourced from the original manufacturer or authorized distributors?
All KSA812OMTF 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 KSA812OMTF meets industry standards.
7.What is the process for return or replacement of KSA812OMTF?
All KSA812OMTF units undergo pre-shipment inspection (PSI). If there is an issue with KSA812OMTF, 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 KSA812OMTF part is unused and in its original packaging.
Return procedure for KSA812OMTF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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