My Inquiry
My Account
onsemi BD239CTU
- Part No.:
- BD239CTU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
BD239CTU.pdf
- Description:
- TRANS NPN 100V 2A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:875
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BD239CTU from onsemi is a PNP epitaxial silicon power transistor in TO-220-3LD package, rated for 100 V VCEO(SUS), 2 A DC collector current, and 30 W collector dissipation at TC = 25 °C; used in medium-power linear regulators and switching circuits such as DC motor drivers and relay drivers.
For engineers reviewing the BD239CTU datasheet, pinout, applications, or equivalent options, key selection factors include its complementary pairing with BD240C, guaranteed hFE ≥ 40 at IC = 0.2 A, VCE(sat) ≤ 0.7 V at IC = 1 A / IB = 0.2 A, and Pb-free TO-220-3LD packaging suitable for industrial power control designs.
Technical Context
This PNP bipolar junction transistor operates in active, saturation, and cutoff regions with defined sustaining voltage (VCEO(SUS) = 100 V) and pulsed capability (ICP = 4 A, PW ≤ 350 µs, duty cycle ≤ 2%). Its DC current gain hFE is specified at two operating points: min 40 at IC = 0.2 A and min 15 at IC = 1 A, supporting both linear amplification and switching roles.
Thermal design requires attention to junction temperature limits (TJ ≤ 150 °C) and case-mounted heat sinking due to its 30 W power dissipation rating at TC = 25 °C; base-emitter breakdown is limited to 5 V, constraining drive circuit compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(SUS) | 100 V - Sustains 100 V between collector and emitter with base open, defining maximum off-state blocking capability in switching applications. |
| IC (DC) | 2 A - Maximum continuous collector current; sets upper bound for steady-state load handling in linear regulators or motor drivers. |
| PC | 30 W - Collector power dissipation at case temperature 25 °C; requires heatsink derating above ambient. |
| hFE | 40 (min) at IC = 0.2 A - Ensures reliable base drive margin for low-current switching; drops to 15 (min) at IC = 1 A, indicating gain compression under load. |
| VCE(sat) | ≤ 0.7 V at IC = 1 A, IB = 0.2 A - Low saturation voltage minimizes conduction loss and self-heating in ON-state switching. |
| TJ | 150 °C - Maximum allowable junction temperature; determines thermal design headroom and reliability under sustained load. |
Pinout & Package
BD239CTU uses the TO-220-3LD package (Case 340AT), with metal tab electrically connected to collector and thermally conductive for heatsink mounting. The plastic body provides electrical isolation of emitter and base leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Left) | Base | Current-controlled input terminal; requires ≤0.6 A peak drive and ≤5 V reverse bias to avoid damage. |
| 2 (Center) | Collector | Main high-side current path; electrically tied to metal tab for thermal conduction and must be isolated from heatsink unless referenced to system ground. |
| 3 (Right) | Emitter | Common return node for PNP operation; connects to positive rail in high-side switch configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Complementary pairing | Explicitly designed as PNP complement to BD240C NPN transistor, enabling matched push-pull and H-bridge output stages. |
| High VCEO(SUS) | 100 V rating supports operation in 48 V industrial bus systems with safety margin against transients. |
| Pb-free TO-220-3LD | RoHS-compliant packaging with standardized footprint and thermal interface, compatible with automated through-hole assembly and manual heatsink mounting. |
| Controlled hFE range | Guaranteed minimum gain of 40 at low current ensures predictable turn-on behavior in driver circuits without excessive base drive overhead. |
Applications
| DC Motor Control | Relay Driving |
|---|---|
Use Scenario: Bidirectional 24–48 V brushed DC motor control in industrial actuators using discrete H-bridge topology. IC Role / Device Role / Timing Role: PNP high-side switch in totem-pole output stage, paired with BD240C on low side. Use Value: 100 V VCEO(SUS) withstands back-EMF spikes during motor commutation; 30 W dissipation enables short-duration stall current handling. | Use Scenario: Driving 12–24 V DC coils in industrial PLC I/O modules with opto-isolated control inputs. IC Role / Device Role / Timing Role: Medium-power PNP switch interfacing microcontroller GPIO to relay coil, providing current gain and voltage level translation. Use Value: hFE ≥ 40 at 0.2 A ensures full saturation with ≤5 mA base drive; VCE(sat) ≤ 0.7 V minimizes coil voltage drop and heating. |
| Linear Voltage Regulation | Power Supply Sequencing |
Use Scenario: Pass transistor in adjustable 3–15 V, 1–2 A linear regulator for analog sensor subsystems requiring low noise. IC Role / Device Role / Timing Role: Series pass element controlled by error amplifier feedback loop, dissipating excess input-output differential voltage. Use Value: 30 W power rating allows safe operation at 10 V dropout × 1.5 A load; TJ = 150 °C rating supports compact heatsinking. | Use Scenario: Controlled power-up sequencing of multiple voltage rails (e.g., 12 V → 5 V → 3.3 V) in embedded controllers. IC Role / Device Role / Timing Role: Delayed-enable PNP switch enabling downstream LDOs via RC-timed base drive, ensuring monotonic ramp-up. Use Value: Predictable hFE and low VBE(on) (≤1.3 V) enable accurate timing with standard resistor-capacitor networks; TO-220 thermal mass aids stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD239G | TO-263 (D²PAK) surface-mount package; identical VCEO, IC, and hFE specs; higher thermal resistance RθJC = 3.5 °C/W vs. BD239CTU's 2.5 °C/W. | Requires PCB rework for SMT assembly; less suited for prototyping or manual heatsink mounting. | Select when automated SMT production and board space constraints outweigh thermal performance needs. |
| BD239C | Same die and specs; differs only in packaging-bulk bag (1200 units) vs. tube (1000 units); identical TO-220-3LD mechanical and electrical characteristics. | No functional difference; choice driven solely by procurement logistics and volume packaging preference. | Select BD239C for high-volume automated placement; BD239CTU preferred for lab use, small-batch builds, or tube-based feeders. |
Compared with MJD239G and BD239C, the BD239CTU offers optimal thermal performance in through-hole form factor and direct compatibility with legacy TO-220 heatsinks, while BD239C provides identical functionality in bulk packaging and MJD239G enables surface-mount integration at a thermal trade-off.
Availability
BD239CTU is available at Aetrix Electronics and suitable for DC motor control, relay driving, and linear voltage regulation requiring stable component supply, long-term industrial availability, and RoHS-compliant through-hole power transistors.
Supply support for BD239CTU 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, sensors, and connectivity solutions for automotive, industrial, and cloud power markets.
The BD239CTU belongs to onsemi's legacy bipolar power transistor family, engineered for robust medium-power linear and switching applications where reliability, thermal performance, and complementary NPN/PNP pairing are critical.
FAQ
What is the pin configuration of the BD239CTU?
The BD239CTU uses TO-220-3LD package with pin 1 = Base, pin 2 = Collector (connected to metal tab), and pin 3 = Emitter. This configuration is standardized across onsemi's BD239 series and verified in the official datasheet mechanical outline diagram. Mounting the device with the tab to a heatsink requires electrical isolation unless the collector is at ground potential. The BD239CTU pinout supports direct replacement in existing BD239C-based layouts.
Is BD239CTU RoHS compliant?
Yes, BD239CTU is explicitly marked as Pb-free in the onsemi datasheet and shipped in RoHS-compliant packaging. The "TU" suffix denotes tube packaging of the Pb-free TO-220-3LD variant. Compliance is confirmed by onsemi's material declarations and aligns with EU Directive 2011/65/EU. BD239CTU meets lead-free soldering requirements and contains no restricted substances above threshold limits.
What is the maximum continuous collector current for BD239CTU?
The maximum continuous collector current (IC) for BD239CTU is 2 A at case temperature TC = 25 °C, as specified in the Absolute Maximum Ratings table. Derating is required above 25 °C - approximately 16 mA/°C reduction per the thermal resistance curve. At TC = 75 °C, usable IC drops to ~1.2 A. This rating applies only with adequate heatsinking; the BD239CTU cannot sustain 2 A without thermal management.
How does BD239CTU differ from BD239C?
BD239CTU and BD239C share identical electrical specifications, die, and TO-220-3LD package. The sole difference is packaging format: BD239CTU ships in 1000-unit tubes ideal for manual assembly and prototyping, while BD239C ships in 1200-unit bulk bags for automated placement. Both are Pb-free and functionally interchangeable; the BD239CTU designation reflects tube packaging, not a parametric revision.
Can BD239CTU be used as a direct replacement for BD240C?
No, BD239CTU cannot replace BD240C because they are complementary devices: BD239CTU is PNP and BD240C is NPN. Swapping them would invert logic polarity and likely cause circuit failure. However, BD239CTU is explicitly designed as the PNP complement to BD240C, enabling matched pair usage in push-pull amplifiers or H-bridges. Their parameters (VCEO, IC, hFE) are balanced for symmetry, but they are not drop-in substitutes.
BD239CTU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 700mV @ 200mA, 1A
- Current - Collector Cutoff (Max):
- 300µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 15 @ 1A, 4V
- Power - Max:
- 30 W
- Frequency - Transition:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
BD239CTU FAQ
1.How can I place an order for BD239CTU through Aetrix?
Please submit a Request for Quotation (RFQ) for BD239CTU 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 BD239CTU reliable?
The price and inventory of BD239CTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BD239CTU is usually 5 days.
3.What payment methods are accepted for BD239CTU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BD239CTU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BD239CTU?
BD239CTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BD239CTU 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 BD239CTU?
For technical support, including BD239CTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BD239CTU requirements.
6.How does Aetrix verify that BD239CTU is sourced from the original manufacturer or authorized distributors?
All BD239CTU 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 BD239CTU meets industry standards.
7.What is the process for return or replacement of BD239CTU?
All BD239CTU units undergo pre-shipment inspection (PSI). If there is an issue with BD239CTU, 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 BD239CTU part is unused and in its original packaging.
Return procedure for BD239CTU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BD239CTU Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
