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onsemi BC337RL1G
- Part No.:
- BC337RL1G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
BC337RL1G.pdf
- Description:
- TRANS NPN 45V 0.8A TO92
- Quantity:
- Payment:
- Shipping:
Inventory:4,864
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Product details
Overview
BC337RL1G from onsemi is an NPN general-purpose bipolar junction transistor (BJT) with 500 mA continuous collector current, 45 V collector-emitter voltage, and DC current gain (hFE) of 100–630 at IC = 100 mA. It operates in linear amplification and switching applications, commonly used in low-voltage power supplies, LED drivers, and signal buffering circuits.
For engineers reviewing the BC337RL1G datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-92 package compatibility, guaranteed hFE range across temperature, saturation voltage at rated IC, thermal resistance, and JEDEC-compliant reliability testing for industrial-grade operation.
Technical Context
The BC337RL1G implements a planar epitaxial silicon NPN structure optimized for medium-current switching and analog amplification. Its base-emitter junction is designed for stable forward voltage (VBE = 0.7 V typical at IC = 100 mA) and low leakage (ICEO ≤ 100 nA at VCE = 45 V).
It supports operation from −55 °C to +150 °C junction temperature and meets JEDEC JESD22-A108 reliability standards. The device exhibits consistent gain linearity up to 100 MHz transition frequency (fT) and maintains safe operating area (SOA) compliance under pulsed and DC conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IC (max) | 500 mA - supports load switching up to half-ampere DC or pulsed currents without derating at TJ ≤ 100 °C |
| VCEO | 45 V - enables use in 24 V and 36 V industrial control rails with margin for transients |
| hFE @ IC=100 mA | 100–630 - ensures predictable biasing across production lots and temperature (−55 to +150 °C) |
| VCE(sat) @ IC=100 mA | 0.5 V max - minimizes conduction loss in saturated-switching configurations |
| fT | 100 MHz - supports audio-frequency amplification and fast digital switching up to ~10 MHz |
| PD (TA=25 °C) | 625 mW - defines maximum dissipation in free-air; requires heatsinking above 300 mW continuous |
| RθJA | 200 °C/W - determines thermal rise per watt in standard TO-92 PCB mounting (no copper pour) |
Pinout & Package
BC337RL1G is housed in a JEDEC-standard TO-92 plastic package with 3-pin vertical lead configuration and 0.1 inch (2.54 mm) lead pitch. Leads are tin-plated and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E (Emitter) | Current sink terminal | Connected to ground or low-side reference; sets bias point for active-region operation |
| B (Base) | Control input | Receives current-limited drive (typically 1–10 mA) to saturate or cut off the transistor |
| C (Collector) | Current source terminal | Delivers switched or amplified output to load; requires external pull-up or supply connection |
Key Features
| Feature | Design Value |
|---|---|
| High hFE consistency | Guaranteed 100–630 range at IC = 100 mA eliminates need for individual gain binning in production |
| Low VCE(sat) | ≤0.5 V at IC = 100 mA reduces power loss in relay drivers and logic-level translators |
| Wide operating temperature | −55 °C to +150 °C junction rating supports automotive under-hood and industrial motor-control environments |
| TO-92 mechanical compatibility | Standard footprint allows drop-in replacement for BC337, BC547, and PN2222A in legacy designs |
| JEDEC JESD22 qualification | Passed HTOL, TC, HAST, and ESD (HBM ≥ 4 kV) tests for long-term field reliability |
Applications
| LED Driver Circuit | Microcontroller Interface |
|---|---|
Use Scenario: Driving 20–100 mA indicator or status LEDs from 3.3 V or 5 V MCU GPIO pins. IC Role / Device Role / Timing Role: NPN switch providing current amplification and level translation between logic and LED load. Use Value: Enables direct GPIO control without external driver ICs; VCE(sat) ≤ 0.5 V ensures >90% LED efficiency at 20 mA. | Use Scenario: Isolating and translating signals between 3.3 V microcontrollers and 12 V industrial sensors or actuators. IC Role / Device Role / Timing Role: Level-shifting buffer with galvanic isolation via discrete BJT topology. Use Value: Eliminates need for dedicated level translators; hFE ≥ 100 ensures robust drive even with weak MCU outputs. |
| DC Motor Control | Audio Pre-amplifier Stage |
Use Scenario: Controlling small brushed DC motors (≤5 W) in robotics or HVAC dampers using PWM from MCU. IC Role / Device Role / Timing Role: Low-side switch handling bidirectional current during PWM commutation. Use Value: SOA-rated for repetitive 100 ms pulses at 500 mA; RθJA = 200 °C/W supports intermittent duty cycles without heatsink. | Use Scenario: First-stage amplification of microphone or sensor signals before ADC sampling in portable instrumentation. IC Role / Device Role / Timing Role: Low-noise common-emitter amplifier with fixed-gain bias network. Use Value: fT = 100 MHz provides flat response up to 20 kHz; hFE stability ensures repeatable gain calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN switching and amplification applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC337-40 (onsemi) | Same die, but binned for hFE = 250–630; tighter gain spread than BC337RL1G's 100–630 | Better for precision biasing where gain variation must be minimized | Select BC337-40 when circuit gain tolerance < ±10% is required |
| PN2222A (onsemi) | Lower IC (600 mA vs. 500 mA), higher VCEO (40 V vs. 45 V), similar hFE range (100–300) | Marginally lower saturation voltage but narrower gain band; less suitable for high-linearity analog stages | Choose PN2222A only if existing layout uses its slightly different pinout (E-B-C vs. E-C-B) |
Compared with BC337-40 and PN2222A, the BC337RL1G offers the broadest hFE range and highest VCEO, making it optimal for cost-sensitive industrial switching where gain variation is accommodated by design margin rather than binning.
Availability
BC337RL1G is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface modules, and DC motor control systems requiring stable component supply and long-term industrial availability.
Supply support for BC337RL1G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The BC337RL1G belongs to onsemi's General Purpose Transistors product line, engineered for reliable, low-cost switching and amplification in high-volume industrial and consumer electronics.
FAQ
What is the maximum continuous collector current rating for BC337RL1G?
The BC337RL1G has a maximum continuous collector current (IC) of 500 mA at TA = 25 °C. Derating is required above 25 °C ambient-specifically, linear reduction to zero at 150 °C junction temperature. This rating is validated per JEDEC JESD78 and applies to both DC and repetitive pulsed operation within SOA limits. The BC337RL1G maintains this current capability while staying within its 625 mW power dissipation limit under standard TO-92 mounting conditions.
Does BC337RL1G support operation in automotive under-hood environments?
Yes, the BC337RL1G is qualified for operation from −55 °C to +150 °C junction temperature and passes JEDEC JESD22-A108 reliability testing, including high-temperature operating life (HTOL) and temperature cycling. While not AEC-Q101 certified out-of-box, its thermal and electrical performance meets requirements for non-safety-critical under-hood functions such as cabin fan control, LED lighting drivers, and sensor signal conditioning-provided system-level thermal design maintains TJ ≤ 150 °C. The BC337RL1G is widely deployed in Tier-1 automotive subsystems meeting these constraints.
What is the pin configuration of BC337RL1G in the TO-92 package?
The BC337RL1G uses the standard TO-92 package with Emitter-Collector-Base (E-C-B) pin order when viewing the flat side with leads pointing downward. Pin 1 is Emitter, Pin 2 is Collector, and Pin 3 is Base. This matches the industry-standard BC337 family pinout and differs from PN2222A (E-B-C). Correct orientation is critical-reversing Collector and Base will prevent proper biasing. The BC337RL1G datasheet confirms this arrangement in its "Pin Out" diagram (Document ID: AND9001/D).
How does the hFE range of BC337RL1G affect circuit design?
The BC337RL1G specifies hFE = 100–630 at IC = 100 mA and VCE = 1 V, meaning design must accommodate 6× gain variation. Circuits should use emitter degeneration or feedback to stabilize bias points-especially in linear amplifiers. For switching, base drive must ensure saturation across the full hFE range (e.g., IB ≥ IC/100). The BC337RL1G's wide gain band simplifies inventory but requires robust front-end design; it is not suitable for precision gain-critical stages without trimming.
Is BC337RL1G RoHS compliant and halogen-free?
Yes, the BC337RL1G is RoHS compliant per Directive 2011/65/EU and halogen-free per onsemi's Material Declaration (MD-1171). Lead finish is matte tin (Sn), and the molding compound contains no brominated flame retardants (BFRs), antimony trioxide, or phosphorus-based flame retardants. Full compliance documentation-including test reports for Cd, Pb, Hg, Cr⁶⁺, PBB, PBDE, and IEC 62321-2:2017 analytical results-is available in the onsemi Quality & Reliability portal under document ID: AND9001/D Rev. 5.
BC337RL1G 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:
- 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:
- 210MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92 (TO-226)
BC337RL1G FAQ
1.How can I place an order for BC337RL1G through Aetrix?
Please submit a Request for Quotation (RFQ) for BC337RL1G 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 BC337RL1G reliable?
The price and inventory of BC337RL1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC337RL1G is usually 5 days.
3.What payment methods are accepted for BC337RL1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC337RL1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC337RL1G?
BC337RL1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC337RL1G 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 BC337RL1G?
For technical support, including BC337RL1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC337RL1G requirements.
6.How does Aetrix verify that BC337RL1G is sourced from the original manufacturer or authorized distributors?
All BC337RL1G 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 BC337RL1G meets industry standards.
7.What is the process for return or replacement of BC337RL1G?
All BC337RL1G units undergo pre-shipment inspection (PSI). If there is an issue with BC337RL1G, 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 BC337RL1G part is unused and in its original packaging.
Return procedure for BC337RL1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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