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onsemi BC337_J35Z
- Part No.:
- BC337_J35Z
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
BC337_J35Z.pdf
- Description:
- TRANS NPN 45V 0.8A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,650
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Product details
Overview
BC337_J35Z from ON Semiconductor is an NPN epitaxial silicon transistor in TO-92 package, rated for 45 V VCEO, 800 mA IC, and 625 mW PD, with hFE range 100–250 (Class 16), used in low-power switching and audio driver stages of consumer electronics and industrial control circuits.
For engineers reviewing the BC337_J35Z datasheet, pinout, applications, or equivalent options, this part serves as a general-purpose small-signal amplifier/switch requiring validated hFE consistency at 100–250, VCE(sat) ≤ 0.7 V at 500 mA, and thermal reliability up to 150°C junction temperature.
Technical Context
The BC337_J35Z operates as a discrete bipolar junction transistor with fixed NPN polarity, optimized for linear amplification and saturated switching in DC-coupled low-voltage circuits. Its hFE classification (16) ensures predictable current gain at IC = 100 mA and VCE = 1 V, while its 200°C/W RθJA defines thermal derating behavior on standard FR-4 PCBs.
It complements the PNP BC327 series and shares identical TO-92 mechanical form factor and absolute maximum ratings with BC337 variants-differing only in hFE binning. No integrated protection, biasing, or digital logic is present; operation requires external base drive and collector load configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown under open-base conditions; sets upper limit for supply rail compatibility in low-voltage switch designs. |
| IC (DC) | 800 mA - Continuous collector current rating; supports moderate-load switching such as relay drivers or LED arrays without forced cooling. |
| PD | 625 mW - Maximum power dissipation at 25°C ambient; requires derating by 5 mW/°C above 25°C for thermal safety in enclosed environments. |
| hFE (Class 16) | 100–250 - Guaranteed DC current gain range at VCE = 1 V, IC = 100 mA; enables predictable base resistor sizing for consistent saturation in switching applications. |
| VCE(sat) | 0.7 V max - Collector-emitter voltage drop in saturation at IC = 500 mA, IB = 50 mA; determines conduction loss and heat generation during on-state operation. |
| fT | 100 MHz - Transition frequency at VCE = 5 V, IC = 10 mA; indicates usable bandwidth for small-signal amplification up to mid-VHF range. |
| Cob | 12 pF - Output capacitance at VCB = 10 V; affects high-frequency response and stability in RF-coupled or fast-switching configurations. |
Pinout & Package
BC337_J35Z is housed in a JEDEC TO-92 3-lead plastic package with straight or bent leads, designed for through-hole mounting and manual or automated insertion. Package dimensions conform to standard TO-92 footprint (7.6 mm × 5.3 mm × 4.0 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Collector) | Main current output terminal | Connected to load or supply rail; carries full collector current and must be routed with adequate trace width for 800 mA DC handling. |
| 2 (Base) | Control input terminal | Receives forward-biased current to enable conduction; requires external current-limiting resistor to ensure IB ≥ IC/hFE(min) for reliable saturation. |
| 3 (Emitter) | Current return path | Typically tied to ground or common reference; establishes emitter-follower or common-emitter topology depending on circuit configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Switching & amplification capability | Validated for both saturated switching (VCE(sat) ≤ 0.7 V) and linear amplification (fT = 100 MHz), enabling dual-role use in cost-sensitive analog/digital hybrid circuits. |
| hFE binning (Class 16) | Guaranteed 100–250 gain range eliminates need for post-production gain sorting in production assemblies targeting predictable base drive requirements. |
| Complementary pairing with BC327 | Matches BC327 PNP in VCEO, IC, PD, and package, allowing direct substitution in push-pull, differential pair, or complementary symmetry amplifier topologies. |
| TO-92 mechanical standardization | Enables drop-in replacement across BC337/BC338 family variants and legacy Fairchild/ON Semi stock, supporting long-term BOM continuity in maintenance and repair contexts. |
Applications
| Audio Preamp Stage | Relay Driver Circuit |
|---|---|
|
Use Scenario: Low-noise voltage amplification of microphone or line-level signals in portable audio devices. IC Role / Device Role / Timing Role: NPN transistor configured in common-emitter mode to provide 20–40 dB voltage gain with minimal distortion. Use Value: hFE consistency (100–250) and fT = 100 MHz ensure stable mid-band gain and low harmonic distortion below 20 kHz. |
Use Scenario: Driving 12 V, 100 mA coil relays in programmable logic controllers and HVAC control panels. IC Role / Device Role / Timing Role: Saturated switch turning relay coil on/off via microcontroller GPIO with minimal base drive overhead. Use Value: VCE(sat) ≤ 0.7 V at 500 mA ensures <100 mW conduction loss, reducing thermal stress during continuous duty cycling. |
| LED Current Switch | Low-Power Oscillator Core |
|
Use Scenario: Constant-current switching of indicator LEDs in battery-powered instrumentation displays. IC Role / Device Role / Timing Role: Emitter-follower or common-emitter switch regulating LED current via base resistor and collector load. Use Value: IC = 800 mA rating supports parallel LED strings up to 500 mA, while TO-92 package allows compact board layout. |
Use Scenario: Active device in Royer or phase-shift oscillator circuits generating 1–10 kHz square waves for sensor excitation. IC Role / Device Role / Timing Role: Amplifying element providing gain and phase shift in feedback loop to sustain oscillation. Use Value: fT = 100 MHz and low Cob = 12 pF support stable oscillation with minimal frequency drift over temperature and supply variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC337-16 (ON Semi) | Same hFE bin (100–250), identical TO-92 package, but marked "BC33716" without underscore; fully compatible pinout and electrical specs. | No functional difference; intended for same switching/amplifier roles with identical thermal and gain behavior. | Select BC337-16 when underscore-free marking is required for automated optical inspection or ERP system compliance. |
| PN2222A (ON Semi) | Higher VCEO (60 V vs. 45 V), lower hFE min (100 vs. 100), same IC and PD; TO-92 package with identical pinout (C-B-E). | Better suited for higher-voltage switching (e.g., 24 V industrial sensors); less gain margin at high IC due to narrower hFE spread. | Choose PN2222A where extended collector voltage headroom is critical and hFE consistency at 300 mA is not required. |
Compared with BC337_J35Z, BC337-16 offers identical performance with updated nomenclature, while PN2222A trades gain predictability for higher voltage tolerance-making the former ideal for legacy design continuity and the latter for upgraded voltage resilience.
Availability
BC337_J35Z is available at Aetrix Electronics and suitable for audio preamplifiers, relay drivers, and LED current switches requiring stable component supply, long-term obsolescence management, and consistent hFE binning across production lots.
Supply support for BC337_J35Z 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 manufacturer specializing in energy-efficient power management, analog, and sensing solutions for automotive, industrial, and consumer markets.
The BC337_J35Z belongs to ON Semiconductor's general-purpose bipolar transistor product line, designed for cost-sensitive, high-volume applications demanding reliability, standardized packaging, and verified gain binning in low-power analog and switching circuits.
FAQ
What is the exact hFE range guaranteed for BC337_J35Z?
The BC337_J35Z is binned to Class 16, guaranteeing a DC current gain (hFE) range of 100 to 250 when measured at VCE = 1 V and IC = 100 mA. This specification is confirmed in the official BC337/BC338 Rev. 1.5 datasheet and applies directly to BC337_J35Z as a member of the BC337 family. No wider or narrower range is specified for this variant.
Is BC337_J35Z pin-compatible with BC337-25 or BC337-40?
Yes, BC337_J35Z shares identical TO-92 package and pinout (Collector-Base-Emitter) with BC337-25 and BC337-40. The only difference among these variants is hFE binning: BC337_J35Z (Class 16: 100–250), BC337-25 (Class 25: 160–400), and BC337-40 (Class 40: 250–630). Electrical and mechanical interchangeability is maintained across all BC337 variants.
What is the maximum operating junction temperature for BC337_J35Z?
The BC337_J35Z has a maximum junction temperature (TJ) rating of 150°C, as specified in the Absolute Maximum Ratings table of the BC337/BC338 datasheet. This value defines the upper thermal limit for reliable operation; sustained operation above this temperature risks permanent degradation of the silicon die and bond wires.
Can BC337_J35Z be used in place of a BC338 in a circuit?
BC337_J35Z is not a direct substitute for BC338 due to lower voltage ratings: BC337_J35Z has VCEO = 45 V and VCES = 50 V, whereas BC338 is rated at VCEO = 25 V and VCES = 30 V. Using BC337_J35Z in a BC338-design may over-specify voltage capability but is electrically safe; however, substituting BC338 for BC337_J35Z risks breakdown if VCE exceeds 25 V.
Does BC337_J35Z have built-in ESD or thermal protection?
No, BC337_J35Z is a discrete bipolar transistor with no integrated ESD protection diodes, thermal shutdown circuitry, or current limiting. It relies entirely on external design measures-such as base series resistors, collector snubbers, and PCB copper area-for ESD robustness and thermal management. This is consistent with all members of the BC337/BC338 family per the official datasheet.
BC337_J35Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 800 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 700mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 100mA, 1V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
BC337_J35Z FAQ
1.How can I place an order for BC337_J35Z through Aetrix?
Please submit a Request for Quotation (RFQ) for BC337_J35Z 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 BC337_J35Z reliable?
The price and inventory of BC337_J35Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC337_J35Z is usually 5 days.
3.What payment methods are accepted for BC337_J35Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC337_J35Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC337_J35Z?
BC337_J35Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC337_J35Z 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 BC337_J35Z?
For technical support, including BC337_J35Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC337_J35Z requirements.
6.How does Aetrix verify that BC337_J35Z is sourced from the original manufacturer or authorized distributors?
All BC337_J35Z 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 BC337_J35Z meets industry standards.
7.What is the process for return or replacement of BC337_J35Z?
All BC337_J35Z units undergo pre-shipment inspection (PSI). If there is an issue with BC337_J35Z, 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 BC337_J35Z part is unused and in its original packaging.
Return procedure for BC337_J35Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC337_J35Z Tags
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