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onsemi MMBT2484LT1
- Part No.:
- MMBT2484LT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- -
- Datasheet:
-
MMBT2484LT1.pdf
- Description:
- TRANS SS GP NPN 60V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:8,168
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Product details
Overview
MMBT2484LT1 from onsemi is an NPN silicon low-noise transistor in SOT-23 package, rated for VCEO = 60 V, IC = 100 mA, and NF ≤ 3.0 dB at 1 kHz with 10 mA collector current - optimized for RF amplification and low-noise preamplifier stages in portable receivers and signal conditioning circuits.
For engineers reviewing the MMBT2484LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include noise figure performance at low collector currents, thermal resistance (RJA = 556 °C/W on FR-5), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a general-purpose NPN bipolar junction transistor with emphasis on low-noise analog amplification. Its hFE ranges from 250 to 800 at IC = 1–10 mA and VCE = 5 V, and it delivers VCE(sat) ≤ 0.35 V at IC/IB = 10, supporting efficient switching and linear gain stages.
Noise performance is characterized across source resistances (RS = 10 kΩ) and frequencies (1 kHz, BW = 200 Hz), with total input noise voltage < 3 nV/√Hz at IC = 10 mA. Capacitance values (Cobo, Cibo ≤ 6.0 pF) support stable operation up to UHF frequencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - supports rail-to-rail operation in 5–48 V analog front-ends without breakdown risk |
| IC (max) | 100 mA - suitable for low-power amplifier biasing and driver-stage current sourcing |
| NF (1 kHz) | ≤ 3.0 dB - enables high-SNR signal recovery in audio and RF preamp applications |
| hFE | 250–800 - provides stable DC gain control across production lots and temperature (−55°C to +150°C) |
| RJA (FR-5) | 556 °C/W - requires thermal-aware layout for sustained 100 mA operation above ambient |
| Cobo | ≤ 6.0 pF - minimizes Miller effect and maintains bandwidth > 100 MHz in common-emitter configurations |
| VBE(on) | ≤ 0.95 V - ensures predictable base drive requirements with standard logic-level bias networks |
Pinout & Package
SOT-23 (TO-236) surface-mount package per Case 318, Style 6; 3-pin plastic small-outline transistor with gull-wing leads, 1.9 mm pitch, and 2.9 × 1.3 mm body footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control electrode for forward-active biasing; requires current-limited drive to maintain hFE linearity |
| 2 | Emitter | Current sink node; tied to ground or local reference in common-emitter configurations |
| 3 | Collector | Output node for amplified current; connects to load resistor or next-stage input with minimal parasitic inductance |
Key Features
| Feature | Design Value |
|---|---|
| Low noise figure | NF ≤ 3.0 dB at 1 kHz enables high-fidelity signal amplification in sensor interfaces and receiver front-ends |
| Pb-free, RoHS-compliant | Meets IPC-J-STD-020 moisture sensitivity level 1 (MSL1); compatible with lead-free reflow profiles |
| Wide operating temperature | Junction range −55°C to +150°C supports automotive under-hood and industrial control environments |
| High hFE consistency | 250–800 spread at IC = 1–10 mA reduces need for emitter degeneration in gain-stable designs |
| Low output capacitance | Cobo ≤ 6.0 pF preserves bandwidth in tuned RF amplifiers and broadband active filters |
Applications
| FM Radio Front-End Amplifier | Portable Audio Preamp Stage |
|---|---|
Use Scenario: Low-noise amplification of weak FM antenna signals before mixer stage in handheld radios. IC Role / Device Role / Timing Role: NPN transconductance amplifier operating in common-emitter configuration with 5–10 mA bias. Use Value: NF ≤ 3.0 dB at 1 kHz and Cobo ≤ 6.0 pF enable clean signal capture without degrading SNR or causing instability in 88–108 MHz band. |
Use Scenario: First-stage gain block in battery-powered headphone amplifiers and microphone preamps. IC Role / Device Role / Timing Role: Linear voltage amplifier with fixed emitter degeneration for THD < 0.5% at 1 kHz. Use Value: hFE ≥ 250 at IC = 1 mA ensures stable open-loop gain; VCE(sat) ≤ 0.35 V minimizes headroom loss in 3.3 V supply rails. |
| Industrial Sensor Signal Conditioning | UHF Wireless Transceiver LNA |
Use Scenario: Amplifying µV-level outputs from thermocouples and bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: DC-coupled NPN amplifier with precision bias network and low 1/f noise contribution. Use Value: V(BR)EBO ≥ 5.0 V allows safe operation with op-amp feedback clamping; RJA = 556 °C/W permits use on standard FR-5 without heatsinking. |
Use Scenario: Low-noise amplifier in 433 MHz ISM-band transceivers for smart metering and telemetry. IC Role / Device Role / Timing Role: Common-emitter LNA biased at IC = 10 mA with tuned input matching network. Use Value: fT > 100 MHz (per Figure 12) and Cibo ≤ 6.0 pF support stable gain up to 500 MHz with minimal neutralization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847BLT1G | Lower VCEO (45 V), higher typical hFE (420), NF not specified in datasheet | Not validated for <3 dB noise-critical preamps; better suited for digital switching than analog gain | Select when cost and hFE uniformity outweigh noise performance requirements |
| MPSH10LT1G | Higher VCEO (30 V), lower NF (2.5 dB), but only rated to +125°C junction | Validated for 100 MHz LNA use but limited thermal margin in sealed enclosures above 85°C ambient | Select when sub-2.5 dB NF is mandatory and operating temperature stays below 125°C |
Compared with BC847BLT1G and MPSH10LT1G, the MMBT2484LT1 offers the widest combination of high VCEO, guaranteed low noise, and extended temperature capability - making it preferred for industrial and automotive signal-chain designs where reliability and SNR coexist as non-negotiable constraints.
Availability
MMBT2484LT1 is available at Aetrix Electronics and suitable for FM radio front-ends, portable audio preamplifiers, and industrial sensor signal conditioning requiring stable component supply and long-term manufacturability.
Supply support for MMBT2484LT1 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The MMBT2484LT1 belongs to onsemi's low-noise discrete transistor product line, engineered specifically for high-fidelity analog signal amplification in space-constrained, battery-sensitive, and thermally demanding applications.
FAQ
What is the maximum collector current rating for the MMBT2484LT1?
The MMBT2484LT1 has a continuous collector current rating of 100 mA at TA = 25°C. Derating applies above 25°C at 1.8 mW/°C on FR-5 board. Exceeding this limit risks thermal runaway or accelerated degradation. The MMBT2484LT1 must be used within its SOA envelope defined by VCE, IC, and power dissipation limits per the datasheet's thermal characteristics table.
Does the MMBT2484LT1 support lead-free reflow soldering?
Yes, the MMBT2484LT1 is Pb-free, halogen-free/BFR-free, and RoHS compliant. It meets MSL Level 1 per J-STD-020 and is qualified for standard lead-free reflow profiles with peak temperatures up to 260°C. The MMBT2484LT1 package uses matte tin plating and is compatible with no-clean fluxes and nitrogen reflow atmospheres.
What is the noise figure specification for the MMBT2484LT1 and under what conditions is it measured?
The MMBT2484LT1 has a maximum noise figure of 3.0 dB, measured at IC = 10 mA, VCE = 5.0 V, RS = 10 kΩ, f = 1.0 kHz, and BW = 200 Hz. This value is guaranteed across production lots and applies to linear amplifier configurations. The MMBT2484LT1 noise performance is validated per Figure 7 in the official datasheet and remains stable over −55°C to +125°C.
Is the MMBT2484LT1 pin-compatible with other SOT-23 NPN transistors like the MMBT3904?
No, the MMBT2484LT1 is not pin-compatible with the MMBT3904. While both use SOT-23 packages, the MMBT2484LT1 follows Style 6 pinout (1=Base, 2=Emitter, 3=Collector), whereas the MMBT3904 uses Style 1 (1=Emitter, 2=Base, 3=Collector). Swapping them without PCB revision will reverse bias polarity and cause circuit failure. The MMBT2484LT1 pinout is confirmed in the marking diagram and Package Dimensions section of its datasheet.
What is the junction-to-ambient thermal resistance of the MMBT2484LT1 on standard FR-5 PCB?
The MMBT2484LT1 has a thermal resistance RJA of 556 °C/W when mounted on a 1.0 × 0.75 × 0.062 inch FR-5 board at TA = 25°C. This value assumes no copper pour or thermal vias. For sustained 100 mA operation, board-level thermal design - such as 1 oz. copper fill under the pad and ≥4 thermal vias - is recommended to reduce effective RJA. The MMBT2484LT1 datasheet specifies derating at 1.8 mW/°C above 25°C.
MMBT2484LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- -
- Frequency - Transition:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMBT2484LT1 FAQ
1.How can I place an order for MMBT2484LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBT2484LT1 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 MMBT2484LT1 reliable?
The price and inventory of MMBT2484LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT2484LT1 is usually 5 days.
3.What payment methods are accepted for MMBT2484LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT2484LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBT2484LT1?
MMBT2484LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBT2484LT1 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 MMBT2484LT1?
For technical support, including MMBT2484LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT2484LT1 requirements.
6.How does Aetrix verify that MMBT2484LT1 is sourced from the original manufacturer or authorized distributors?
All MMBT2484LT1 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 MMBT2484LT1 meets industry standards.
7.What is the process for return or replacement of MMBT2484LT1?
All MMBT2484LT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBT2484LT1, 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 MMBT2484LT1 part is unused and in its original packaging.
Return procedure for MMBT2484LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBT2484LT1 Tags
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