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onsemi BC558BZL1
- Part No.:
- BC558BZL1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
BC558BZL1.pdf
- Description:
- TRANS PNP 30V 0.1A TO92
- Quantity:
- Payment:
- Shipping:
Inventory:4,761
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Product details
Overview
BC558BZL1 from onsemi is a PNP silicon small-signal amplifier transistor in TO-92 package, rated for VCEO = −30 V, IC = −100 mA continuous, hFE = 180–300 at IC = −10 mA, fT = 360 MHz, and VCE(sat) ≤ −0.65 V at IC = −100 mA. It serves as a general-purpose linear amplifier or switch in low-power analog and digital interface circuits.
For engineers reviewing the BC558BZL1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal limits, TO-92 terminal mapping, real-world use cases, and two validated alternative parts - all aligned to ON Semiconductor's BC558B family specifications.
Technical Context
The BC558BZL1 operates as a discrete PNP bipolar junction transistor optimized for amplification and switching in DC-coupled or AC-coupled low-voltage circuits. Its −30 V VCEO rating and 360 MHz fT support audio preamplifier stages and medium-speed logic interfacing up to ~100 kHz switching.
Thermal design relies on RJA = 200°C/W (ambient) and RJC = 83.3°C/W (case), with maximum junction temperature of +150°C. Safe operating area (SOA) curves define limits under pulsed conditions, with second breakdown and thermal constraints governing high-current operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −30 V - Maximum collector-emitter voltage before breakdown; sets upper rail limit in PNP common-emitter amplifier designs. |
| IC (continuous) | −100 mA - Continuous collector current capacity; supports load driving up to ~100 mA in active bias configurations. |
| hFE @ IC = −10 mA | 180–300 - DC current gain range defining base drive requirements for saturation or linear operation. |
| fT | 360 MHz - Unity-gain bandwidth; enables stable small-signal amplification up to ~30–50 MHz with proper compensation. |
| VCE(sat) | ≤ −0.65 V @ IC = −100 mA, IB = −5 mA - Saturation voltage determines power loss and logic-level compatibility in switching applications. |
| NF | 2.0 dB @ IC = −0.2 mA, f = 1 kHz - Low noise figure suitable for microphone preamps and sensor signal conditioning. |
| Cob | 3.0–6.0 pF @ VCB = −10 V - Output capacitance affecting high-frequency gain roll-off and stability in RF-adjacent stages. |
Pinout & Package
BC558BZL1 uses the standard TO-92 (Case 29, Style 17) through-hole plastic package with 3 leads. Pin 1 is Collector, Pin 2 is Base, Pin 3 is Emitter - confirmed by ON Semiconductor's marking diagram and package outline on page 7 of the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Collector) | Main current sink terminal | Connected to most positive supply node in PNP configuration; carries full load current and defines SOA boundaries. |
| 2 (Base) | Control input terminal | Receives forward-biased current to turn on device; requires series resistor to limit IB per hFE and desired IC. |
| 3 (Emitter) | Current source terminal | Typically tied to VCC; establishes reference for VBE biasing and sets emitter degeneration options. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-free TO-92 packaging | Complies with RoHS Directive 2011/65/EU; compatible with lead-free reflow and wave soldering processes. |
| High fT / low Cob combination | 360 MHz gain-bandwidth with ≤6 pF output capacitance enables wideband amplification without excessive peaking. |
| Low noise performance | 2.0 dB noise figure at 1 kHz allows use in sensitive analog front-ends like electret microphone biasing and sensor amplifiers. |
| Wide TJ range | −55°C to +150°C junction temperature rating supports operation in industrial and automotive under-hood environments. |
| Controlled hFE binning | B-series grading ensures hFE = 180–300 at IC = −10 mA, simplifying bias network design across production lots. |
Applications
| Audio Preamp Stage | Level-Shifting Interface |
|---|---|
|
Use Scenario: Amplifying low-level signals from electret microphones or piezoelectric sensors in portable audio devices. IC Role / Device Role / Timing Role: PNP common-emitter amplifier providing 20–40 dB voltage gain with DC-coupled biasing. Use Value: 2.0 dB noise figure and 360 MHz fT preserve signal integrity while enabling compact PCB layout with minimal external components. |
Use Scenario: Translating 3.3 V logic outputs to 5 V or 12 V loads in mixed-supply embedded systems. IC Role / Device Role / Timing Role: Saturated PNP switch controlling higher-voltage rails via base-driven on/off control. Use Value: VCE(sat) ≤ −0.65 V at −100 mA ensures <100 mW dissipation during sustained conduction, reducing thermal stress. |
| Current Mirror Reference | Discrete Op-Amp Input Pair |
|
Use Scenario: Building matched current sources in analog power management ICs or precision DAC output buffers. IC Role / Device Role / Timing Role: One leg of a PNP current mirror with BC558BZL1 matched to identical unit for ratio accuracy. Use Value: Tight hFE binning (180–300) and low VBE(on) variation (−0.62 to −0.7 V) improve mirror ratio stability over temperature. |
Use Scenario: Constructing discrete-input differential pairs in high-voltage op-amps or instrumentation amplifiers. IC Role / Device Role / Timing Role: Input stage transistor delivering high input impedance and common-mode rejection in dual-NPN/PNP topology. Use Value: 360 MHz fT and 3–6 pF Cob support >10 MHz unity-gain bandwidth when paired with complementary NPN devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP small-signal amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC558CZL1 | Higher hFE (270–500 @ −10 mA); same VCEO, fT, and package. | Better suited for low-base-drive applications (e.g., battery-powered sensors); may require adjusted bias resistors. | Select when higher DC gain reduces base current demand without changing layout or thermal design. |
| BC557BZL1 | Higher VCEO (−45 V); otherwise identical hFE, fT, and TO-92 footprint. | Enables use in 36 V industrial control inputs where BC558BZL1 would exceed rating. | Choose when system rail exceeds 30 V but same gain/speed/noise performance is required. |
Compared with BC558BZL1, BC558CZL1 offers higher gain for reduced base drive, while BC557BZL1 extends voltage capability to −45 V - both retain identical TO-92 pinout and thermal behavior, enabling direct substitution only when their specific parameter advantages align with circuit requirements.
Availability
BC558BZL1 is available at Aetrix Electronics and suitable for audio preamplifiers, level-shifting interfaces, and current mirror references requiring stable component supply, consistent hFE binning, and RoHS-compliant TO-92 packaging.
Supply support for BC558BZL1 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BC558BZL1 belongs to the BC556/557/558 family of general-purpose PNP transistors designed for cost-sensitive, high-volume linear and switching applications in consumer electronics, power supplies, and interface circuits.
FAQ
What is the maximum collector-emitter voltage rating for BC558BZL1?
The BC558BZL1 has a maximum collector-emitter voltage (VCEO) rating of −30 VDC. This value is specified under test condition IC = −2.0 mA with IB = 0, and must not be exceeded to avoid breakdown. Derating is required above 25°C ambient per the datasheet's thermal resistance values.
Does BC558BZL1 have Pb-free construction?
Yes, BC558BZL1 is manufactured in a Pb-free TO-92 package, compliant with RoHS Directive 2011/65/EU. The "ZL1" suffix denotes ammo pack packaging, and the "G" variant (BC558BZL1G) explicitly confirms Pb-free status - though BC558BZL1 itself is Pb-free per ON Semiconductor's ordering information table on page 6.
What is the typical DC current gain (hFE) range for BC558BZL1 at −10 mA collector current?
The BC558BZL1 is binned as a "B-series" device, with hFE ranging from 180 to 300 when tested at IC = −10 mA and VCE = −5.0 V. This range is confirmed in the Electrical Characteristics table on page 2 of the datasheet and applies across the full operating temperature range.
Can BC558BZL1 be used in switching applications?
Yes, BC558BZL1 supports switching operation with VCE(sat) ≤ −0.65 V at IC = −100 mA and IB = −5.0 mA. Its 360 MHz fT and low storage time enable reliable operation up to ~100 kHz; however, safe operating area (SOA) curves on page 5 must be observed for pulsed loads.
What is the thermal resistance from junction to ambient (RJA) for BC558BZL1 in free-air conditions?
The BC558BZL1 has a maximum junction-to-ambient thermal resistance (RJA) of 200°C/W when mounted on a standard FR-4 PCB with no heatsink. This value assumes natural convection cooling and defines the worst-case temperature rise per watt of dissipated power at the die level.
BC558BZL1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 30 V
- Vce Saturation (Max) @ Ib, Ic:
- 650mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 180 @ 2mA, 5V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 360MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92 (TO-226)
BC558BZL1 FAQ
1.How can I place an order for BC558BZL1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC558BZL1 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 BC558BZL1 reliable?
The price and inventory of BC558BZL1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC558BZL1 is usually 5 days.
3.What payment methods are accepted for BC558BZL1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC558BZL1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC558BZL1?
BC558BZL1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC558BZL1 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 BC558BZL1?
For technical support, including BC558BZL1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC558BZL1 requirements.
6.How does Aetrix verify that BC558BZL1 is sourced from the original manufacturer or authorized distributors?
All BC558BZL1 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 BC558BZL1 meets industry standards.
7.What is the process for return or replacement of BC558BZL1?
All BC558BZL1 units undergo pre-shipment inspection (PSI). If there is an issue with BC558BZL1, 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 BC558BZL1 part is unused and in its original packaging.
Return procedure for BC558BZL1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC558BZL1 Tags
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