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onsemi BC307CZL1
- Part No.:
- BC307CZL1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
BC307CZL1.pdf
- Description:
- TRANS PNP 45V 0.1A TO92
- Quantity:
- Payment:
- Shipping:
Inventory:28,000
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Product details
Overview
BC307CZL1 from ON Semiconductor (formerly Motorola) is a PNP silicon small-signal transistor in TO-92 package, rated for VCEO = –45 V, IC = –100 mA, and PD = 350 mW at TA = 25°C. It delivers hFE = 420–800 at IC = –2.0 mA and VCE = –5.0 V, with fT = 280 MHz, suited for general-purpose amplification and switching in low-voltage analog and digital circuits.
For engineers reviewing the BC307CZL1 datasheet, pinout, applications, or equivalent options, this page provides verified electrical specifications, TO-92 terminal mapping, thermal resistance data (RJA = 357 °C/W), noise figure (NF = 2.0 dB), and validated alternative parts for design-in and obsolescence mitigation.
Technical Context
The BC307CZL1 operates as a medium-gain, medium-speed PNP bipolar junction transistor optimized for linear amplification and saturated switching. Its DC current gain spans 420–800 under IC = –2.0 mA, VCE = –5.0 V conditions, and it maintains fT = 280 MHz with Ccbo = 6.0 pF and VCE(sat) ≤ –0.25 V at IC = –100 mA / IB = –5.0 mA.
Thermally, it features RJA = 357 °C/W (junction-to-ambient) and RJC = 125 °C/W (junction-to-case), enabling operation across –55°C to +150°C junction temperature range. Its low noise figure (2.0 dB at IC = –0.2 mA, f = 1 kHz) supports audio preamplifier and sensor interface applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | –45 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in common-emitter amplifier stages. |
| IC (continuous) | –100 mA - Continuous collector current limit; determines maximum load drive capability in switching applications. |
| hFE (min/typ/max) | 420 / 500 / 800 - DC current gain at IC = –2.0 mA, VCE = –5.0 V; ensures stable biasing in Class-A amplifiers. |
| fT | 280 MHz - Current-gain bandwidth product; supports RF amplification up to ~100 MHz with adequate gain margin. |
| VCE(sat) | ≤ –0.25 V @ IC = –100 mA, IB = –5.0 mA - Low saturation voltage minimizes power loss in digital logic interface and relay driver circuits. |
| NF | 2.0 dB @ IC = –0.2 mA, f = 1 kHz - Low noise performance suitable for microphone preamps and precision sensor signal conditioning. |
| RJA | 357 °C/W - Thermal resistance to ambient; requires ≥ 1 cm² copper pour for full 350 mW dissipation at room temperature. |
Pinout & Package
BC307CZL1 is housed in TO-92 (Case 29–04, Style 17), a through-hole plastic package with 2.54 mm lead pitch and radial tape compatibility for automated insertion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Collector | Main current sink node; connects to load or supply rail in PNP configurations (e.g., high-side switch emitter-follower). |
| 2 | Base | Control input; requires negative base current relative to emitter to turn on; typical IB ≈ IC/hFE. |
| 3 | Emitter | Current source node; tied to positive supply in most PNP amplifier/switch topologies; sets reference for VBE and VCE. |
Key Features
| Feature | Design Value |
|---|---|
| High DC current gain | hFE up to 800 enables low-base-drive designs, reducing control circuit loading in battery-powered systems. |
| Low saturation voltage | VCE(sat) ≤ –0.25 V at full rated current ensures <10 mW conduction loss in 100 mA switching loads. |
| 280 MHz fT | Supports wideband amplification up to VHF band; usable in IF stages of AM/FM receivers and oscillator buffers. |
| 2.0 dB noise figure | Enables clean signal amplification in low-level analog front-ends such as electret microphone preamps and thermocouple interfaces. |
| TO-92 mechanical standardization | EIA-468 compliant; compatible with legacy pick-and-place feeders, wave soldering fixtures, and manual prototyping breadboards. |
Applications
| Audio Preamp Stage | Discrete Logic Level Shifter |
|---|---|
|
Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors in portable audio devices. IC Role / Device Role / Timing Role: PNP common-emitter amplifier with emitter degeneration resistor for stable gain and linearity. Use Value: 2.0 dB NF and hFE ≥ 420 ensure >40 dB voltage gain with minimal added noise at 1–10 kHz. |
Use Scenario: Converting 3.3 V logic outputs to interface with 5 V or 12 V peripheral control lines. IC Role / Device Role / Timing Role: Saturated PNP switch configured as active-low level shifter with pull-up resistor. Use Value: VCE(sat) ≤ –0.25 V guarantees <0.3 V output high-level drop, preserving noise margins in mixed-voltage systems. |
| Low-Power Relay Driver | Current Mirror Reference |
|
Use Scenario: Driving 5–12 V, 50–100 mA coil relays from microcontroller GPIO pins. IC Role / Device Role / Timing Role: High-gain PNP switch with base resistor limiting IB to achieve forced β = 10–20. Use Value: Guaranteed hFE ≥ 420 ensures reliable saturation with ≤ 5 mA base drive, minimizing MCU port loading. |
Use Scenario: Building matched current sources in analog ICs or discrete op-amp bias networks. IC Role / Device Role / Timing Role: One transistor in a two-device mirror pair, leveraging tight hFE distribution across BC307 variants. Use Value: Tight hFE tolerance (420–800) and low VBE(on) variation (–0.55 to –0.7 V) yield <5% current mismatch at matched VCE. |
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 |
|---|---|---|---|
| BC327-40 | VCEO = –45 V, hFE = 250–630 (IC = –10 mA), RJA = 300 °C/W - lower thermal resistance but narrower hFE range. | Preferred where higher power dissipation margin is needed; less suitable for low-noise preamp due to higher NF (≈3.5 dB). | Select BC327-40 when board layout allows larger copper area and noise requirements are relaxed. |
| PN2907A | VCEO = –60 V, hFE = 100–300 (IC = –150 mA), fT = 200 MHz - higher voltage rating but lower gain and bandwidth. | Better for high-voltage switching (e.g., 48 V industrial controls); unsuitable for RF or low-noise audio due to reduced fT and NF. | Choose PN2907A only when VCEO > –45 V is mandatory and gain/bandwidth trade-offs are acceptable. |
Compared with BC307CZL1, BC327-40 offers improved thermal performance but sacrifices low-noise advantage, while PN2907A extends voltage capability at the cost of gain-linearity and bandwidth-making BC307CZL1 optimal for balanced analog/switching use cases demanding both fidelity and efficiency.
Availability
BC307CZL1 is available at Aetrix Electronics and suitable for audio preamplifiers, discrete logic level shifters, and low-power relay drivers requiring stable component supply across industrial, consumer, and automotive auxiliary electronics programs.
Supply support for BC307CZL1 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 supplier specializing in energy-efficient power management, analog, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The BC307CZL1 belongs to ON Semiconductor's legacy small-signal transistor portfolio, designed for general-purpose amplification and switching in cost-sensitive, space-constrained analog and mixed-signal applications.
FAQ
What is the maximum collector-emitter voltage rating for BC307CZL1?
The BC307CZL1 has a maximum collector-emitter voltage (VCEO) rating of –45 Vdc, tested at IC = –2.0 mAdc with IB = 0. This defines its safe operating area in common-emitter configurations and must not be exceeded to prevent avalanche breakdown. Derating is required above 25°C ambient per the datasheet thermal curve.
Does BC307CZL1 support high-frequency amplification?
Yes, BC307CZL1 delivers a current-gain bandwidth product (fT) of 280 MHz at IC = –10 mAdc and VCE = –5.0 Vdc, making it suitable for VHF-band amplification, oscillator buffer stages, and broadband signal conditioning up to ~100 MHz with usable gain.
What is the typical DC current gain (hFE) of BC307CZL1 at low collector current?
At IC = –10 µAdc and VCE = –5.0 Vdc, BC307CZL1 exhibits hFE ≥ 120 (min), rising to 420–800 at IC = –2.0 mAdc. This wide gain range supports stable biasing in both low-current sensor interfaces and moderate-power switching circuits.
Can BC307CZL1 be used in low-noise audio applications?
Yes - BC307CZL1 has a noise figure (NF) of 2.0 dB at IC = –0.2 mAdc, VCE = –5.0 Vdc, RS = 2.0 kΩ, and f = 1 kHz, confirming suitability for electret microphone preamplifiers, phono stage inputs, and other low-level analog signal paths where SNR preservation is critical.
What package type and pin configuration does BC307CZL1 use?
BC307CZL1 uses the TO-92 (Case 29–04, Style 17) package with standardized pinout: Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter. This through-hole format supports manual soldering, wave soldering, and radial tape feeding for automated assembly.
BC307CZL1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 250mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 420 @ 2mA, 5V
- Power - Max:
- 350 mW
- Frequency - Transition:
- 280MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92 (TO-226)
BC307CZL1 FAQ
1.How can I place an order for BC307CZL1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC307CZL1 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 BC307CZL1 reliable?
The price and inventory of BC307CZL1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC307CZL1 is usually 5 days.
3.What payment methods are accepted for BC307CZL1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC307CZL1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC307CZL1?
BC307CZL1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC307CZL1 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 BC307CZL1?
For technical support, including BC307CZL1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC307CZL1 requirements.
6.How does Aetrix verify that BC307CZL1 is sourced from the original manufacturer or authorized distributors?
All BC307CZL1 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 BC307CZL1 meets industry standards.
7.What is the process for return or replacement of BC307CZL1?
All BC307CZL1 units undergo pre-shipment inspection (PSI). If there is an issue with BC307CZL1, 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 BC307CZL1 part is unused and in its original packaging.
Return procedure for BC307CZL1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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