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onsemi BDX34CG
- Part No.:
- BDX34CG
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
BDX34CG.pdf
- Description:
- TRANS PNP DARL 100V 10A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:3,524
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Product details
Overview
BDX34CG from onsemi is a PNP complementary Darlington silicon power transistor in TO-220 package, rated for 10 A continuous collector current, 100 V collector-emitter sustaining voltage (VCEO(sus)), and 70 W total device dissipation at TC = 25°C. It delivers high DC current gain (hFE = 750 min at IC = 3.0 A), low saturation voltage (VCE(sat) ≤ 2.5 V), and integrated base-emitter shunt resistors - used in linear power supplies and motor control circuits requiring robust low-speed switching.
For engineers reviewing the BDX34CG datasheet, pinout, applications, or equivalent options, key selection criteria include verified VCEO(sus) ≥ 100 V, confirmed TO-220 case 221A mechanical outline with Style 1 pinout (Base/Collector/Emitter/Collector), thermal resistance RθJC = 1.78 °C/W, and Pb-free RoHS-compliant packaging per onsemi Rev. 15 datasheet.
Technical Context
The BDX34CG operates as a monolithic PNP Darlington pair with built-in base-emitter shunt resistors, enabling simplified drive requirements and stable biasing without external components. Its safe operating area (SOA) is thermally limited at TC = 25°C for DC and short-pulse operation, with second-breakdown constraints governing higher-voltage, lower-current regions.
It exhibits hFE = 750–2500 (typ.) across IC = 0.1–6.0 A at VCE = 3–4 V, and maintains VBE(on) ≤ 2.5 V and VF ≤ 4.0 V (diode forward voltage at IC = 8.0 A). Junction temperature range spans −65°C to +150°C, supporting industrial and automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(sus) | 100 Vdc minimum - supports reliable blocking in 80–100 V DC bus applications without derating |
| IC (continuous) | 10 Adc - enables direct drive of medium-power loads like solenoids and relay coils |
| PD @ TC = 25°C | 70 W - requires heatsink with thermal resistance ≤ 1.78 °C/W to maintain TJ ≤ 150°C |
| hFE | 750 min at IC = 3.0 A - reduces required base drive current to ≤ 4 mA for full conduction |
| VCE(sat) | 2.5 V max at IC = 3.0 A, IB = 6.0 mA - limits conduction loss to ≤ 7.5 W at rated current |
| RθJC | 1.78 °C/W - defines minimum heatsink performance needed for thermal stability under sustained load |
Pinout & Package
BDX34CG uses the TO-220 package (Case 221A, Style 1), with metal tab electrically connected to Collector. The plastic body provides electrical isolation between leads and mounting surface. Mounting requires insulating washer or pad when heatsink is grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input node; accepts low-current drive (≤ 250 mA peak) to switch 10 A collector current |
| 2 | Collector | Main power output terminal; internally bonded to metal tab for thermal conduction and high-current path |
| 3 | Emiter | Power return path; referenced to system ground or negative rail in PNP high-side switching configurations |
| 4 | Collector | Secondary collector connection; paralleled with Pin 2 to reduce bond-wire resistance and improve current sharing |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Darlington construction | Integrates driver and output transistors on single die, eliminating interconnect parasitics and ensuring matched thermal behavior |
| Built-in base-emitter shunt resistors | Ensures turn-off reliability without external pull-downs, critical for noise-immune operation in industrial controls |
| 100 V VCEO(sus) rating | Supports use in 48 V and 72 V battery systems with margin against transients and inductive kickback |
| Pb-free and RoHS-compliant | Meets EU Directive 2011/65/EU and JESD204B process requirements for lead-free assembly compatibility |
Applications
| Linear Power Supply Regulation | Motor Start/Stop Control |
|---|---|
Use Scenario: Regulating unregulated 80–100 V DC input to stable 24 V output in industrial bench supplies. IC Role / Device Role / Timing Role: PNP Darlington pass transistor handling up to 10 A load current with minimal base drive. Use Value: High hFE reduces series-pass transistor driver complexity; low VCE(sat) minimizes dropout and heat generation. | Use Scenario: Controlling 5–8 A DC brushed motors in automated gate actuators and HVAC dampers. IC Role / Device Role / Timing Role: Low-speed switching element interfacing microcontroller GPIO to motor winding. Use Value: Integrated shunt resistors prevent false turn-on from leakage; 100 V rating absorbs back-EMF spikes during commutation. |
| DC-DC Converter Pre-regulator | High-Current Relay Driver |
Use Scenario: Stepping down 90 V DC intermediate bus to 48 V before buck converter stage in telecom power systems. IC Role / Device Role / Timing Role: Linear pre-regulator transistor managing bulk power conversion prior to high-frequency switching. Use Value: 70 W dissipation capability allows continuous operation at 5 A × 12 V drop = 60 W without forced cooling. | Use Scenario: Driving 10 A-rated industrial relays in PLC output modules with 24 V control logic. IC Role / Device Role / Timing Role: Final-stage power switch translating TTL/CMOS logic signals into high-current coil activation. Use Value: Dual-collector configuration (Pins 2 & 4) lowers effective on-resistance and improves thermal distribution under pulsed loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP Darlington power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BDX34C | Same electrical specs and TO-220 package but non-Pb-free; RoHS exemption applies only to legacy versions | No functional difference; unsuitable for new designs targeting full RoHS compliance | Select BDX34CG for all new production requiring documented Pb-free status and JESD204B soldering compatibility |
| MJ15024G | Higher VCEO = 250 V, higher PD = 250 W, TO-3 package; no internal shunt resistors | Requires external base pull-down; suited for high-voltage audio amplifiers, not general-purpose switching | Choose MJ15024G only when >150 V blocking or >100 W dissipation is required; BDX34CG offers simpler drive and smaller footprint |
Compared with BDX34C and MJ15024G, the BDX34CG uniquely combines RoHS-compliant Pb-free packaging, integrated base shunt resistors, and 100 V/10 A capability in TO-220 - making it optimal for cost-sensitive, space-constrained industrial controls where ease of drive and regulatory compliance are mandatory.
Availability
BDX34CG is available at Aetrix Electronics and suitable for linear power regulation, motor control, relay driving, and DC-DC pre-regulation requiring stable component supply across extended product lifecycles.
Supply support for BDX34CG 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The BDX34CG belongs to onsemi's legacy silicon power transistor family designed specifically for rugged, low-speed switching and linear regulation in industrial power systems - emphasizing reliability, thermal robustness, and simplified drive architecture.
FAQ
What is the maximum continuous collector current rating for the BDX34CG?
The BDX34CG is rated for 10 A continuous collector current (IC) at case temperature TC = 25°C. Derating is required above this temperature per the 0.56 W/°C slope specified in the datasheet. At TC = 100°C, maximum usable IC drops to approximately 5.8 A assuming linear derating and constant VCE.
Does the BDX34CG have built-in base-emitter resistors?
Yes, the BDX34CG features monolithic construction with built-in base-emitter shunt resistors. This design eliminates the need for external pull-down resistors, improving noise immunity and ensuring reliable turn-off in electrically noisy industrial environments - a key differentiator from discrete PNP transistors like the MJE15034.
What is the thermal resistance junction-to-case (RθJC) for the BDX34CG?
The BDX34CG has a thermal resistance of RθJC = 1.78 °C/W, measured from junction to case (metal tab). This value assumes proper mounting with thermal compound and mechanical pressure; actual system-level RθJA depends on heatsink size, airflow, and insulation method.
Is the BDX34CG pin-compatible with the BDX34B or BDX34C variants?
Yes, the BDX34CG shares identical TO-220 package dimensions, Style 1 pinout (Base/Collector/Emitter/Collector), and mechanical footprint with BDX34B and BDX34C. However, BDX34CG is rated for 100 V VCEO(sus), while BDX34B is rated for 80 V - making them electrically non-interchangeable in 80–100 V applications without redesign verification.
What does the 'G' suffix indicate in BDX34CG?
The 'G' suffix in BDX34CG denotes a Pb-free, RoHS-compliant package per onsemi's standard. It confirms compliance with EU Directive 2011/65/EU and compatibility with lead-free reflow profiles (J-STD-020). The 'G' variant replaces legacy BDX34C in new designs requiring documented environmental compliance.
BDX34CG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- PNP - Darlington
- Current - Collector (Ic) (Max):
- 10 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 2.5V @ 6mA, 3A
- Current - Collector Cutoff (Max):
- 500µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 750 @ 3A, 3V
- Power - Max:
- 70 W
- Frequency - Transition:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
BDX34CG FAQ
1.How can I place an order for BDX34CG through Aetrix?
Please submit a Request for Quotation (RFQ) for BDX34CG 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 BDX34CG reliable?
The price and inventory of BDX34CG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BDX34CG is usually 5 days.
3.What payment methods are accepted for BDX34CG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BDX34CG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BDX34CG?
BDX34CG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BDX34CG 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 BDX34CG?
For technical support, including BDX34CG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BDX34CG requirements.
6.How does Aetrix verify that BDX34CG is sourced from the original manufacturer or authorized distributors?
All BDX34CG 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 BDX34CG meets industry standards.
7.What is the process for return or replacement of BDX34CG?
All BDX34CG units undergo pre-shipment inspection (PSI). If there is an issue with BDX34CG, 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 BDX34CG part is unused and in its original packaging.
Return procedure for BDX34CG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BDX34CG Tags
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