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onsemi FJX733YTF
- Part No.:
- FJX733YTF
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
FJX733YTF.pdf
- Description:
- TRANS PNP 50V 0.15A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:9,421
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Product details
Overview
FJX733YTF from ON Semiconductor is a PNP epitaxial silicon transistor designed for low-frequency amplifier applications, with a collector-base voltage rating of −60 V, collector-emitter voltage of −50 V, and DC current gain (hFE) ranging from 350 to 700 at IC = −1 mA and VCE = −6 V. It features low saturation voltage (VCE(sat) ≤ −0.3 V at IC = −100 mA), 2.8 pF output capacitance, and operates in SOT-323 package.
For engineers reviewing the FJX733YTF datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, −150 mA continuous collector current capability, −200 mW power dissipation limit, junction temperature range up to 150°C, and complementarity to FJX945 in push-pull or differential pair configurations.
Technical Context
The FJX733YTF is a general-purpose PNP bipolar junction transistor optimized for linear amplification in audio and signal conditioning circuits. Its hFE classification "Y" denotes a DC current gain range of 350–700, and it exhibits a current gain–bandwidth product (fT) of 50–180 MHz under specified bias conditions.
It operates with reverse-biased junctions: VCBO = −60 V, VCEO = −50 V, and VEBO = −5 V. Saturation behavior is characterized by VCE(sat) ≤ −0.3 V at IC = −100 mA / IB = −10 mA, and base-emitter on voltage is −0.50 to −0.80 V at IC = −1 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V - maximum allowable collector-to-emitter voltage before breakdown in common-emitter configuration |
| IC | −150 mA - continuous DC collector current handling capacity, defining small-signal and switching load limits |
| hFE (Y grade) | 350–700 - guaranteed DC current gain range at VCE = −6 V, IC = −1 mA, enabling predictable biasing in amplifier stages |
| VCE(sat) | ≤ −0.3 V - low saturation voltage at IC = −100 mA / IB = −10 mA, minimizing conduction loss in switching applications |
| fT | 50–180 MHz - usable bandwidth limit for small-signal amplification, supporting low-frequency RF and IF stages |
| Cob | 2.8 pF - output capacitance at VCB = −10 V, influencing high-frequency roll-off and stability in amplifier feedback networks |
| PC | 200 mW - maximum power dissipation at TA = 25°C, constraining thermal design in surface-mount layouts |
Pinout & Package
Package: SOT-323 (SC-70), 3-pin plastic surface-mount package with standard lead pitch of 0.65 mm and body dimensions 2.00 × 1.25 × 0.90 mm. Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Current-controlled input terminal | Receives forward-biased base current to regulate collector-emitter conduction; requires external bias network for stable Q-point |
| 2 (Emitter) | Common reference terminal in common-base/common-collector configurations | Typically connected to ground or supply rail; polarity reversal defines PNP operation versus NPN |
| 3 (Collector) | Output current terminal | Sinks current from load when biased active or saturated; connects to negative supply or pull-down node in PNP logic/amplifier topologies |
Key Features
| Feature | Design Value |
|---|---|
| High hFE Y-grade binning | Guaranteed 350–700 hFE enables precise DC bias design without gain variation-induced drift in amplifier quiescent points |
| Low VCE(sat) | ≤ −0.3 V at rated IC/IB reduces power loss and heat generation in saturated-switching roles such as level translation or discrete logic |
| Complementary pairing | Designed as direct complement to FJX945 (NPN), facilitating matched push-pull output stages and differential amplifiers |
| Low-noise performance | Noise figure of 6.0–20 dB at 1 MHz with Rs = 10 kΩ supports low-distortion preamplifier and sensor interface use cases |
Applications
| Audio Pre-amplifier Stage | Discrete Level Translator |
|---|---|
Use Scenario: Amplifying weak microphone or piezoelectric sensor signals in battery-powered portable audio devices. IC Role / Device Role / Timing Role: PNP small-signal amplifier in common-emitter configuration with emitter degeneration for linearity. Use Value: High hFE and low noise figure (6.0–20 dB) preserve signal integrity while enabling single-supply operation with negative-rail referenced biasing. | Use Scenario: Converting TTL/CMOS logic levels to −5 V compatible signals for legacy industrial control interfaces. IC Role / Device Role / Timing Role: Saturated PNP switch driving open-collector or negative-rail loads. Use Value: Low VCE(sat) (≤ −0.3 V) minimizes voltage drop and ensures reliable logic-low assertion across temperature and process variation. |
| Differential Pair Input Stage | Current Mirror Reference |
Use Scenario: Front-end input stage of an instrumentation amplifier requiring matched gain and offset tracking. IC Role / Device Role / Timing Role: One leg of a PNP-based differential pair, paired with complementary FJX945 for symmetry. Use Value: Tight hFE binning (Y grade) and consistent VBE(on) (−0.50 to −0.80 V) improve common-mode rejection and thermal tracking. | Use Scenario: Building a precision two-transistor current mirror in analog power management ICs or sensor bias networks. IC Role / Device Role / Timing Role: Reference-side transistor in a matched mirror topology sourcing stable bias current. Use Value: Low ICBO (≤ −100 nA) and high VCBO (−60 V) ensure minimal error current and robust operation under varying supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT3906LT1G | hFE range 100–300 (lower gain), VCEO = −40 V, same SOT-23 package but different pinout (1=E, 2=B, 3=C) | Less suitable for high-gain, low-noise preamp stages; better for general-purpose switching where gain tolerance is relaxed | Select when cost sensitivity outweighs gain/noise requirements and PCB layout allows pinout adaptation |
| BC807-40 | hFE range 250–630 (overlaps Y grade), VCEO = −45 V, SOT-23 package with identical pinout (1=B, 2=E, 3=C) | Marginally lower voltage ratings limit use in −50 V rail designs; otherwise functionally interchangeable in most low-frequency amplifier roles | Prefer when existing SOT-23 footprint reuse is required and −45 V VCEO suffices for system margin |
Compared with MMBT3906LT1G and BC807-40, the FJX733YTF delivers higher guaranteed hFE, superior VCEO and VCBO ratings, and lower noise-making it optimal for precision low-frequency amplification where gain consistency and signal fidelity are critical.
Availability
FJX733YTF is available at Aetrix Electronics and suitable for audio preamplifiers, discrete logic level translators, differential input stages, and current mirror references requiring stable component supply and consistent parametric performance across production lots.
Supply support for FJX733YTF 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 semiconductor manufacturer specializing in energy-efficient power management, analog, and discrete components for automotive, industrial, and consumer applications.
The FJX733YTF belongs to ON Semiconductor's legacy small-signal bipolar transistor product line, originally developed by Fairchild for general-purpose linear amplification and switching in space-constrained, cost-sensitive designs.
FAQ
What is the pin configuration of the FJX733YTF?
The FJX733YTF uses a SOT-323 package with standardized pinout: Pin 1 is Base, Pin 2 is Emitter, and Pin 3 is Collector. This matches JEDEC MO-203AA outline and is distinct from SOT-23 pin assignments. The FJX733YTF pinout must be verified against board layout footprints before assembly to avoid functional failure due to reversed polarity connections.
What does the 'Y' suffix in FJX733YTF indicate?
The 'Y' in FJX733YTF specifies the hFE gain bin: 350–700 at VCE = −6 V and IC = −1 mA. This grading ensures tighter DC current gain distribution than standard 'R', 'O', or 'G' bins, making the FJX733YTF especially suitable for amplifier designs requiring predictable bias point stability and reduced unit-to-unit variation.
Is the FJX733YTF a direct replacement for the FJX733?
Yes-the FJX733YTF is the updated ON Semiconductor designation for the original Fairchild FJX733, with the underscore replaced by a dash per post-acquisition nomenclature alignment. Electrical specifications, package, pinout, and marking remain identical; only the part number format changed. Designers may use FJX733YTF interchangeably with legacy FJX733 documentation and footprints.
What is the maximum operating temperature for the FJX733YTF?
The FJX733YTF has a maximum junction temperature (TJ) of 150°C and a storage temperature range of −55°C to +150°C. Derating is required above 25°C ambient: power dissipation must decrease linearly beyond that point per the device's thermal resistance specification. Thermal design must account for SOT-323's limited heatsinking capability to prevent exceeding TJ in sustained operation.
How does the FJX733YTF compare to its NPN complement FJX945?
The FJX733YTF is the designated PNP complement to the NPN FJX945, sharing matching voltage ratings (VCBO, VCEO), similar hFE ranges, and identical SOT-323 packaging. This pairing enables thermally tracked differential pairs, Class AB output stages, and balanced current mirrors-critical for minimizing distortion and offset in analog signal paths where the FJX733YTF provides symmetrical performance to the FJX945.
FJX733YTF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- 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:
- 120 @ 1mA, 6V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
FJX733YTF FAQ
1.How can I place an order for FJX733YTF through Aetrix?
Please submit a Request for Quotation (RFQ) for FJX733YTF 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 FJX733YTF reliable?
The price and inventory of FJX733YTF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FJX733YTF is usually 5 days.
3.What payment methods are accepted for FJX733YTF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FJX733YTF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FJX733YTF?
FJX733YTF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FJX733YTF 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 FJX733YTF?
For technical support, including FJX733YTF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FJX733YTF requirements.
6.How does Aetrix verify that FJX733YTF is sourced from the original manufacturer or authorized distributors?
All FJX733YTF 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 FJX733YTF meets industry standards.
7.What is the process for return or replacement of FJX733YTF?
All FJX733YTF units undergo pre-shipment inspection (PSI). If there is an issue with FJX733YTF, 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 FJX733YTF part is unused and in its original packaging.
Return procedure for FJX733YTF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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