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onsemi BC307BZL1G
- Part No.:
- BC307BZL1G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
BC307BZL1G.pdf
- Description:
- TRANS PNP 45V 0.1A TO92
- Quantity:
- Payment:
- Shipping:
Inventory:7,296
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Product details
Overview
BC307BZL1G from onsemi is a PNP silicon small-signal amplifier transistor in TO-92 package, rated for −45 VCEO, −100 mAC, 350 mW at TA = 25°C, with hFE of 120–290 (IC = −10 mA, VCE = −5 V), used in low-power linear amplification and switching circuits in consumer audio and industrial control interfaces.
For engineers reviewing the BC307BZL1G datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, guaranteed hFE range per variant, Pb-free TO-92 mechanical compatibility, thermal resistance (RJA = 357°C/W), and noise figure (NF = 2.0 dB typical at 1 kHz).
Technical Context
The BC307BZL1G operates as a general-purpose PNP bipolar junction transistor optimized for linear amplification and medium-speed switching. Its DC current gain (hFE) is specified across three test conditions: 120–290 at IC = −10 mA, 200–500 at IC = −2 mA, and 80–180 at IC = −100 mA - confirming gain stability across bias ranges.
It features fT = 280 MHz (typical), Ccbo = 6.0 pF max, and VBE(on) = −0.55 to −0.7 V, supporting stable operation in audio preamp stages and discrete logic inverters where predictable base drive and low capacitance are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V - Maximum safe collector-emitter voltage before breakdown; defines usable supply headroom in PNP emitter-follower or common-emitter configurations. |
| IC (max) | −100 mA - Continuous collector current limit; sets upper bound for load-driving capability in discrete switch or amplifier output stage. |
| PD @ TA=25°C | 350 mW - Power dissipation limit at ambient temperature; determines thermal derating requirement (2.8 mW/°C above 25°C) in enclosed PCB layouts. |
| hFE (IC=−10 mA) | 120–290 - Verified DC current gain range; enables predictable biasing in Class-A amplifiers without gain-bin selection. |
| fT | 280 MHz (typ) - Transition frequency; supports stable small-signal amplification up to ~10–20 MHz with controlled phase margin. |
| NF | 2.0 dB (typ @ 1 kHz) - Low-noise performance; suitable for microphone preamplifier input stages where signal integrity is critical. |
Pinout & Package
BC307BZL1G uses the standard TO-92 (Case 29, Style 17) through-hole plastic package with 3 leads, lead spacing 2.54 mm, and Pb-free finish compliant with J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Collector | Main current sink terminal; connects to most negative potential in PNP common-emitter or common-base topologies. |
| 2 | Base | Control electrode; requires negative bias relative to emitter to turn on; typical VBE(on) = −0.62 V. |
| 3 | Emitter | Current source terminal; usually tied to circuit ground or positive rail in PNP applications; carries full load current. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-free TO-92 packaging | Fully RoHS-compliant construction with verified solderability per J-STD-020; eliminates lead contamination risk in final assembly. |
| Guaranteed hFE bin (B variant) | 120–290 at IC = −10 mA ensures consistent gain matching across production lots without post-manufacture sorting. |
| Low noise figure | 2.0 dB typical at 1 kHz enables use in high-fidelity analog front-ends where SNR degradation must be minimized. |
| High fT / low Ccbo | 280 MHz fT and ≤6.0 pF Ccbo support stable RF-coupled amplification up to VHF band edge in discrete designs. |
Applications
| Audio Preamp Stage | Discrete Logic Inverter |
|---|---|
Use Scenario: Amplifying low-level signals from electret microphones or magnetic pickups in portable audio devices. IC Role / Device Role / Timing Role: PNP small-signal amplifier configured in common-emitter topology with emitter degeneration. Use Value: 2.0 dB NF and stable hFE ensure minimal added noise and repeatable gain without feedback trimming. | Use Scenario: Implementing TTL-compatible level-shifting inverters in legacy industrial control panels with discrete logic. IC Role / Device Role / Timing Role: Saturated PNP switch driving LED indicators or relay coils from 5 V logic outputs. Use Value: VCE(sat) ≤ −0.25 V at IC/IB = 10 guarantees low power loss and clean logic-low assertion. |
| Current Mirror Reference | Temperature Sensor Bias |
Use Scenario: Building matched current sources in analog sensor signal conditioning circuits for pressure or light measurement. IC Role / Device Role / Timing Role: PNP element in a two-transistor current mirror with emitter resistors for thermal tracking. Use Value: Tight hFE spread (120–290) and −55 to +150°C TJ range enable stable mirroring over industrial temperature extremes. | Use Scenario: Providing precision bias current for silicon diode-based temperature sensors in HVAC control modules. IC Role / Device Role / Timing Role: Constant-current source using VBE reference and resistor-set base bias. Use Value: −0.55 to −0.7 V VBE(on) with low tempco supports accurate ΔVBE measurement across −40 to +85°C operating range. |
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 | Same TO-92 package; hFE = 250–630 (higher gain bin); VCEO = −45 V; PD = 625 mW (higher power rating) | Preferred where higher gain or thermal margin is needed; may require re-biasing due to wider hFE spread | Select BC327-40 when designing for higher-current loads (>150 mA) or tighter gain tolerance via binning. |
| PN2907A | TO-92 package; hFE = 100–300; VCEO = −60 V; PD = 400 mW; fT = 200 MHz (lower than BC307BZL1G) | Better voltage margin but lower bandwidth; suitable for slower switching or HV bias networks | Choose PN2907A when extended VCEO headroom is prioritized over high-frequency response. |
Compared with BC307BZL1G, BC327-40 offers higher power handling and gain but less standardized hFE consistency across batches, while PN2907A trades bandwidth for superior voltage rating - both require validation of bias point stability and thermal layout in replacement scenarios.
Availability
BC307BZL1G is available at Aetrix Electronics and suitable for audio preamplifiers, discrete logic inverters, and current mirror references requiring stable component supply, Pb-free compliance, and verified TO-92 mechanical fit.
Supply support for BC307BZL1G 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 focused on energy-efficient technologies for automotive, industrial, cloud, and IoT applications.
The BC307BZL1G belongs to onsemi's legacy general-purpose bipolar transistor family, designed for cost-sensitive, high-reliability linear and switching functions in consumer and industrial electronics.
FAQ
What is the maximum collector-emitter voltage rating for BC307BZL1G?
The BC307BZL1G has a maximum collector-emitter voltage (VCEO) rating of −45 Vdc. This value is tested under specified conditions (IC = −2.0 mA, IB = 0) and defines the absolute upper limit before avalanche breakdown occurs. Exceeding this voltage risks permanent device failure, so design margins should maintain at least 20% derating in continuous operation.
Is BC307BZL1G RoHS-compliant and what does the 'G' suffix indicate?
Yes, BC307BZL1G is RoHS-compliant. The 'G' suffix explicitly denotes a Pb-free (lead-free) package per J-STD-020 standards, confirmed in the official onsemi datasheet revision. This applies to both the TO-92 body and internal leadframe plating, ensuring compatibility with modern reflow profiles and environmental compliance requirements.
What is the typical current gain (hFE) range for BC307BZL1G at IC = −10 mA?
The BC307BZL1G exhibits a guaranteed hFE range of 120 to 290 when tested at IC = −10 mA and VCE = −5.0 Vdc. This bin (B variant) is tighter than the C variant (200–500), making BC307BZL1G preferable for applications requiring predictable DC bias without gain binning or trim components.
Can BC307BZL1G be used in high-frequency amplifier designs?
Yes, BC307BZL1G supports high-frequency small-signal amplification with a typical fT of 280 MHz and Ccbo ≤ 6.0 pF. It is suitable for VHF-band preamplifiers and RF coupling stages up to ~30 MHz, provided layout minimizes parasitic inductance and grounding is optimized - but it is not intended for RF power amplification or GHz-range operation.
How does the thermal resistance of BC307BZL1G affect PCB layout decisions?
With RJA = 357°C/W, BC307BZL1G requires careful thermal management: copper pour under the emitter pad, short traces, and avoidance of heat-trapping enclosures. Derating begins at 2.8 mW/°C above 25°C ambient, so at 75°C ambient, maximum usable power drops to ~210 mW - necessitating layout validation for sustained operation in sealed industrial housings.
BC307BZL1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 200 @ 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)
BC307BZL1G FAQ
1.How can I place an order for BC307BZL1G through Aetrix?
Please submit a Request for Quotation (RFQ) for BC307BZL1G 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 BC307BZL1G reliable?
The price and inventory of BC307BZL1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC307BZL1G is usually 5 days.
3.What payment methods are accepted for BC307BZL1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC307BZL1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC307BZL1G?
BC307BZL1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC307BZL1G 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 BC307BZL1G?
For technical support, including BC307BZL1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC307BZL1G requirements.
6.How does Aetrix verify that BC307BZL1G is sourced from the original manufacturer or authorized distributors?
All BC307BZL1G 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 BC307BZL1G meets industry standards.
7.What is the process for return or replacement of BC307BZL1G?
All BC307BZL1G units undergo pre-shipment inspection (PSI). If there is an issue with BC307BZL1G, 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 BC307BZL1G part is unused and in its original packaging.
Return procedure for BC307BZL1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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