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onsemi BC558BRL1
- Part No.:
- BC558BRL1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
BC558BRL1.pdf
- Description:
- TRANS PNP 30V 0.1A TO92
- Quantity:
- Payment:
- Shipping:
Inventory:8,900
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Product details
Overview
BC558BRL1 from onsemi is a PNP silicon small-signal amplifier transistor in TO-92 package, rated for VCEO = −30 V, IC = −100 mA continuous, hFE = 220–460 at IC = −2 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-voltage analog front-ends and discrete logic interfaces.
For engineers reviewing the BC558BRL1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, TO-92 terminal mapping, real-world use cases in biasing networks and signal inversion stages, and two validated alternative transistors with documented gain and voltage rating differences.
Technical Context
The BC558BRL1 operates as a discrete PNP bipolar junction transistor optimized for linear amplification and switching in DC-coupled or AC-coupled configurations. Its hFE range (220–460 @ IC = −2 mA) supports stable biasing across temperature, while its fT of 360 MHz enables audio-frequency and low-speed digital signal handling.
Thermal design is constrained by RJA = 200°C/W and RJC = 83.3°C/W, with safe operating area limited by second breakdown at high VCE/IC combinations. The device exhibits VBE(on) = −0.55 to −0.7 V and Cob = 3.0–6.0 pF, defining input impedance and high-frequency roll-off behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −30 V - Maximum collector-emitter voltage before breakdown; defines usable supply headroom in PNP common-emitter stages. |
| IC (cont.) | −100 mA - Continuous collector current limit; sets maximum load drive capability without thermal derating. |
| hFE | 220–460 @ IC = −2 mA - DC current gain range; determines base drive requirements for predictable saturation or active-mode operation. |
| fT | 360 MHz - Transition frequency; indicates usable bandwidth for small-signal amplification up to ~30–50 MHz with gain. |
| VCE(sat) | ≤ −0.65 V @ IC = −100 mA, IB = −5 mA - Saturation voltage; impacts power loss and logic-level compatibility in switching applications. |
| Cob | 3.0–6.0 pF @ VCB = −10 V - Output capacitance; limits high-frequency response and affects stability in RF or fast-switching circuits. |
Pinout & Package
BC558BRL1 uses the standard TO-92 (Case 29, Style 17) through-hole plastic package with 3 leads, 4.45–5.20 mm height, and 2.54 mm lead pitch. Pin 1 is Collector, Pin 2 is Base, Pin 3 is Emitter - confirmed per onsemi marking diagram and package outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Collector) | Main current sink node | Connected to most positive rail in PNP configuration; carries full load current and defines power dissipation path. |
| 2 (Base) | Control input terminal | Receives forward-biased current to enable conduction; requires series resistor to limit IB and ensure hFE-based IC control. |
| 3 (Emitter) | Current source reference | Typically tied to VCC; establishes voltage reference for emitter-follower or common-base operation. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-free TO-92 packaging | Complies with RoHS Directive 2011/65/EU; suitable for lead-free reflow and automated assembly without contamination risk. |
| Low noise figure | NF = 2.0 dB @ IC = −0.2 mA, f = 1 kHz - Enables use in preamplifier stages where signal integrity and SNR preservation are critical. |
| High fT / low Cob ratio | 360 MHz / 3–6 pF - Supports stable gain above 10 MHz with minimal phase shift; advantageous over BC557 variants in wideband designs. |
| Wide TJ range | −55°C to +150°C - Allows deployment in industrial ambient environments and under PCB self-heating without parameter drift beyond spec. |
Applications
| Audio Preamp Stage | Discrete Level Shifter |
|---|---|
|
Use Scenario: Amplifying microphone or line-level signals in battery-powered portable audio devices. IC Role / Device Role / Timing Role: PNP common-emitter small-signal amplifier providing 20–30 dB voltage gain with DC coupling. Use Value: Low VCE(sat) and 2.0 dB NF preserve dynamic range and minimize distortion in first-stage gain blocks. |
Use Scenario: Converting TTL/CMOS logic outputs to negative-rail referenced control signals for analog switches or op-amp inputs. IC Role / Device Role / Timing Role: Inverting level translator with emitter-follower output buffering. Use Value: hFE ≥ 220 ensures reliable switching at 1–5 MHz with <100 ns propagation delay and rail-to-rail swing. |
| LED Driver Switch | Current Mirror Reference |
|
Use Scenario: Driving indicator LEDs from microcontroller GPIO pins with inverted logic polarity. IC Role / Device Role / Timing Role: Saturated PNP switch controlling LED anode connection to VCC. Use Value: VCE(sat) ≤ −0.65 V minimizes power loss and thermal rise at IC = −20 mA, extending LED lifetime. |
Use Scenario: Building matched current sources in precision analog ICs or sensor conditioning circuits. IC Role / Device Role / Timing Role: Active component in two-transistor current mirror topology with emitter degeneration. Use Value: Tight hFE tolerance (220–460) and low VBE tempco support <±2% current matching across −40°C to +85°C. |
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 |
|---|---|---|---|
| BC557BRL1 | VCEO = −45 V, hFE = 150–270, fT = 320 MHz | Higher breakdown voltage but lower gain and bandwidth; better for higher-supply rails where 30 V is insufficient. | Select BC557BRL1 when VCC > 30 V is required and gain margin >200 is acceptable. |
| BC558CRL1 | hFE = 460–800, same VCEO/fT, tighter gain binning | Higher minimum hFE improves consistency in production bias networks but increases cost and variability in saturation voltage. | Choose BC558CRL1 only when circuit requires guaranteed hFE ≥ 460 and can tolerate VCE(sat) up to −0.82 V. |
Compared with BC557BRL1 and BC558CRL1, the BC558BRL1 offers the optimal balance of breakdown safety (−30 V), gain (220–460), and bandwidth (360 MHz) for 5–12 V systems requiring predictable linear operation without over-spec'ing voltage or gain.
Availability
BC558BRL1 is available at Aetrix Electronics and suitable for audio preamplifiers, discrete logic level shifters, LED driver switches, and current mirror references requiring stable component supply and RoHS-compliant TO-92 packaging.
Supply support for BC558BRL1 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 cloud infrastructure markets.
The BC558BRL1 belongs to the BC556/557/558 family of general-purpose PNP transistors designed for cost-sensitive, high-volume linear and switching applications in consumer, industrial, and communication equipment.
FAQ
What is the maximum collector-emitter voltage rating for BC558BRL1?
The BC558BRL1 has a maximum collector-emitter voltage (VCEO) rating of −30 VDC. This value is specified under test conditions of IC = −2.0 mA with IB = 0, and represents the absolute maximum reverse-biased voltage the device can withstand before breakdown. Exceeding −30 V risks irreversible damage to the BC558BRL1 junction.
Does BC558BRL1 support lead-free soldering processes?
Yes, BC558BRL1 is manufactured in a Pb-free TO-92 package compliant with RoHS Directive 2011/65/EU. It supports standard lead-free reflow profiles (peak temperature ≤ 260°C) and is qualified per J-STD-020 moisture sensitivity level (MSL) 1, enabling direct use in automated SMT and through-hole assembly without special handling.
What is the typical DC current gain (hFE) range for BC558BRL1 at IC = −2 mA?
The BC558BRL1 exhibits a DC current gain (hFE) range of 220 to 460 when tested at IC = −2.0 mA and VCE = −5.0 V. This bin ('B' suffix) is distinct from BC558A (120–220) and BC558C (460–800), offering mid-range gain stability ideal for production bias networks where excessive gain variation must be avoided.
Can BC558BRL1 be used in high-frequency amplifier designs?
Yes, BC558BRL1 has a current-gain bandwidth product (fT) of 360 MHz, making it suitable for small-signal amplification up to approximately 30–50 MHz with usable gain. Its Cob of 3.0–6.0 pF and low noise figure (2.0 dB) further support stable performance in RF front-ends, oscillator buffers, and broadband audio drivers where parasitic capacitance must be minimized.
How is the pinout configured for BC558BRL1 in TO-92 package?
The BC558BRL1 uses the standard TO-92 Style 17 pinout: Pin 1 is Collector, Pin 2 is Base, and Pin 3 is Emitter - verified in the onsemi datasheet Figure 1 and Package Dimensions section. When viewing the flat side of the TO-92 package with leads pointing downward, the leftmost pin is Pin 1 (Collector), center is Pin 2 (Base), and rightmost is Pin 3 (Emitter).
BC558BRL1 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):
- 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)
BC558BRL1 FAQ
1.How can I place an order for BC558BRL1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC558BRL1 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 BC558BRL1 reliable?
The price and inventory of BC558BRL1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC558BRL1 is usually 5 days.
3.What payment methods are accepted for BC558BRL1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC558BRL1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC558BRL1?
BC558BRL1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC558BRL1 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 BC558BRL1?
For technical support, including BC558BRL1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC558BRL1 requirements.
6.How does Aetrix verify that BC558BRL1 is sourced from the original manufacturer or authorized distributors?
All BC558BRL1 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 BC558BRL1 meets industry standards.
7.What is the process for return or replacement of BC558BRL1?
All BC558BRL1 units undergo pre-shipment inspection (PSI). If there is an issue with BC558BRL1, 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 BC558BRL1 part is unused and in its original packaging.
Return procedure for BC558BRL1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC558BRL1 Tags
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onsemi
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MMBT3906-7-F
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Nexperia USA Inc.
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