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onsemi KSA733GBU-ON
- Part No.:
- KSA733GBU-ON
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
KSA733GBU-ON.pdf
- Description:
- TRANS PNP 50V 0.15A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:60,000
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Product details
Overview
KSA733GBU-ON from onsemi (formerly Fairchild Semiconductor) is a PNP epitaxial silicon transistor designed for low-frequency amplification and switching applications, with VCBO = −60 V, VCEO = −50 V, IC = −150 mA, hFE = 40–700 (depending on grade), and fT = 50–180 MHz - commonly used in audio preamplifier stages and relay driver circuits.
For engineers reviewing the KSA733GBU-ON datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-92 package, complementary pairing with KSC945, DC current gain classification, saturation voltage at high drive current, and noise figure performance at 1 MHz.
Technical Context
This PNP bipolar junction transistor operates in active, saturation, and cutoff regions with verified breakdown voltages (BVCBO = −60 V, BVCEO = −50 V, BVEBO = −5 V) and low leakage (ICBO ≤ −100 nA, IEBO ≤ −100 nA). Its hFE spans 40–700 across R/O/Y/G/L grades, enabling gain-matched designs in multi-stage analog signal chains.
The device delivers VCE(sat) = −0.18 to −0.3 V at IC = −100 mA / IB = −10 mA and exhibits Cob = 2.8 pF at VCB = −10 V, supporting stable low-frequency amplifier biasing and predictable small-signal response up to 180 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | −60 V - maximum reverse bias allowed between collector and base without breakdown |
| VCEO | −50 V - maximum safe collector-emitter voltage under open-base condition |
| IC | −150 mA - continuous DC collector current rating defining switching/amplifier load capacity |
| hFE | 40–700 - DC current gain range across standardized grading bins (R to L), enabling precision gain selection |
| fT | 50–180 MHz - unity-gain bandwidth confirming suitability for low-frequency RF and wideband audio |
| VCE(sat) | −0.18 to −0.3 V - low saturation voltage ensures minimal power loss in switching applications |
| NF | 6.0–20 dB - noise figure at 1 MHz and Rs = 10 kΩ, relevant for low-noise preamplifier design |
Pinout & Package
Package: TO-92 (3-lead plastic through-hole), lead configuration: Emitter (1), Base (2), Collector (3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current exit terminal; referenced to ground or negative rail in common-emitter configurations |
| 2 | Base | Control input; requires current-limited drive to bias transistor into active or saturation region |
| 3 | Collector | Current entry terminal; connected to load or supply rail in low-side switch or amplifier topologies |
Key Features
| Feature | Design Value |
|---|---|
| Complementary Pairing | Designed as direct complement to NPN KSC945, enabling matched push-pull and differential pair implementations |
| Gain Grading | Five hFE bins (R/O/Y/G/L) allow precise gain matching in multi-transistor circuits without external trimming |
| Low Saturation Voltage | VCE(sat) ≤ −0.3 V at −100 mA enables efficient switching in battery-powered relay drivers and logic-level translators |
| Low Noise Performance | NF ≤ 20 dB at 1 MHz supports use in sensitive microphone preamplifiers and sensor signal conditioning stages |
Applications
| Audio Preamp Stage | Relay Driver Circuit |
|---|---|
Use Scenario: Amplifying weak signals from dynamic microphones or piezoelectric sensors before ADC sampling. IC Role / Device Role / Timing Role: Low-noise PNP amplifier in common-emitter configuration with emitter degeneration. Use Value: NF = 6.0–20 dB and hFE ≥ 40 ensure adequate SNR and stable gain without oscillation at audio frequencies. | Use Scenario: Driving electromagnetic relays requiring ~100 mA coil current from microcontroller GPIO pins. IC Role / Device Role / Timing Role: Saturated-switch PNP transistor acting as low-side current sink with base current limiting. Use Value: VCE(sat) ≤ −0.3 V minimizes power dissipation and heat rise during sustained relay activation. |
| Differential Amplifier Pair | Level Translation Interface |
Use Scenario: Forming the PNP half of a long-tailed pair in instrumentation amplifier front-ends. IC Role / Device Role / Timing Role: Matched gain transistor paired with KSC945 to balance CMRR and offset drift. Use Value: hFE grading (R–L) and consistent VBE(on) enable binning-based matching for <1% gain error. | Use Scenario: Translating 3.3 V logic outputs to −5 V compatible control lines in legacy industrial systems. IC Role / Device Role / Timing Role: Inverting level shifter using emitter-follower or common-emitter topology. Use Value: VEBO = −5 V and robust VCEO rating support reliable operation with negative rail referencing. |
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 VCEO (−300 V), lower hFE (25–200), TO-92 package, no hFE grading | Better suited for high-voltage switching (e.g., CRT deflection), less ideal for low-noise gain-critical stages | Select when breakdown voltage > −100 V is required; avoid where hFE matching or low-noise is critical |
| KSA992 | Higher IC (−500 mA), higher PC (500 mW), same TO-92 footprint, hFE = 120–240 (Y grade only) | Supports heavier loads and higher power dissipation but lacks multi-bin hFE selection | Choose for higher-current relay or lamp drivers; not recommended for precision gain-matched pairs |
Compared with MPSA92 and KSA992, the KSA733GBU-ON offers uniquely graded hFE bins and optimized noise performance for low-frequency analog signal paths, while trading off maximum voltage and current ratings for tighter parameter control in cost-sensitive consumer and industrial electronics.
Availability
KSA733GBU-ON is available at Aetrix Electronics and suitable for audio preamplifiers, relay driver circuits, differential amplifier pairs, and level translation interfaces requiring stable component supply and consistent TO-92 mechanical compatibility.
Supply support for KSA733GBU-ON 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 Fairchild Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The KSA733GBU-ON belongs to onsemi's legacy general-purpose bipolar transistor product line, engineered specifically for low-frequency analog amplification, switching, and complementary circuit design in cost-sensitive, high-volume applications.
FAQ
What is the pin configuration of the KSA733GBU-ON?
The KSA733GBU-ON uses a TO-92 package with standard pinout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector. This configuration is confirmed in the original Fairchild datasheet Rev. A2 and matches industry-standard PNP orientation for through-hole mounting and hand-soldering workflows. The KSA733GBU-ON pinout supports direct replacement in existing KSA733-based PCB layouts.
Is the KSA733GBU-ON a direct complement to the KSC945?
Yes, the KSA733GBU-ON is explicitly designed as the PNP complement to the NPN KSC945, sharing matched electrical characteristics including breakdown voltages, gain ranges, and thermal profiles. This pairing enables balanced push-pull output stages and differential amplifiers. The KSA733GBU-ON datasheet confirms this relationship in its "Complement to KSC945" feature statement.
What hFE grade does the 'G' suffix indicate in KSA733GBU-ON?
The 'G' suffix in KSA733GBU-ON denotes the hFE grade G, corresponding to a DC current gain range of 200–400 at VCE = −6 V and IC = −1 mA. This grade is one of five standardized bins (R/O/Y/G/L) defined in the Fairchild datasheet and allows designers to select KSA733GBU-ON units with predictable gain behavior for matched circuitry without post-manufacture testing.
Can the KSA733GBU-ON be used in switching applications?
Yes, the KSA733GBU-ON supports switching operation with VCE(sat) = −0.18 to −0.3 V at IC = −100 mA / IB = −10 mA, ensuring low conduction loss. Its TO-92 package limits thermal dissipation to 250 mW, so switching duty cycle and ambient temperature must remain within derated limits. The KSA733GBU-ON is routinely applied in relay drivers and LED current switches where speed is secondary to reliability and cost.
What is the maximum operating junction temperature for the KSA733GBU-ON?
The KSA733GBU-ON has a maximum rated junction temperature (TJ) of 150°C, as specified in the Absolute Maximum Ratings table of the official onsemi datasheet. This rating defines the upper thermal limit for safe semiconductor operation; sustained operation above this threshold risks permanent degradation. Designers must ensure PCB layout, ambient conditions, and power dissipation keep actual TJ below 150°C during KSA733GBU-ON operation.
KSA733GBU-ON Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- 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:
- 200 @ 1mA, 6V
- Power - Max:
- 250 mW
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
KSA733GBU-ON FAQ
1.How can I place an order for KSA733GBU-ON through Aetrix?
Please submit a Request for Quotation (RFQ) for KSA733GBU-ON 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 KSA733GBU-ON reliable?
The price and inventory of KSA733GBU-ON are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSA733GBU-ON is usually 5 days.
3.What payment methods are accepted for KSA733GBU-ON?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSA733GBU-ON transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSA733GBU-ON?
KSA733GBU-ON orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSA733GBU-ON 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 KSA733GBU-ON?
For technical support, including KSA733GBU-ON datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSA733GBU-ON requirements.
6.How does Aetrix verify that KSA733GBU-ON is sourced from the original manufacturer or authorized distributors?
All KSA733GBU-ON 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 KSA733GBU-ON meets industry standards.
7.What is the process for return or replacement of KSA733GBU-ON?
All KSA733GBU-ON units undergo pre-shipment inspection (PSI). If there is an issue with KSA733GBU-ON, 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 KSA733GBU-ON part is unused and in its original packaging.
Return procedure for KSA733GBU-ON:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KSA733GBU-ON Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
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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
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