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Infineon Technologies BCX71KE6327HTSA1
- Part No.:
- BCX71KE6327HTSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BCX71KE6327HTSA1.pdf
- Description:
- TRANS PNP 45V 0.1A PG-SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,361
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Product details
Overview
BCX71KE6327HTSA1 from Infineon Technologies is a PNP silicon small-signal transistor designed for audio-frequency input stages and driver circuits. It delivers VCEO = 45 V, hFE = 100–110 (at IC = 2 mA), VCE(sat) ≤ 0.25 V (at IC = 10 mA), and fT = 250 MHz - enabling low-noise amplification in battery-powered portable audio preamps.
For engineers reviewing the BCX71KE6327HTSA1 datasheet, BCX71KE6327HTSA1 pinout, BCX71KE6327HTSA1 application, or BCX71KE6327HTSA1 equivalent, key selection criteria include guaranteed hFE group K (100–110 at 2 mA), low VCE(sat) under medium drive, SOT23 package thermal resistance (RthJS ≤ 240 K/W), and AEC-Q101 qualification for automotive signal conditioning.
Technical Context
This PNP transistor operates with fixed-emitter biasing in common-emitter configuration, supporting linear amplification up to 15 kHz with noise figure F = 2 dB (IC = 200 µA, RS = 2 kΩ). Its hFE group K ensures consistent current gain across production lots without binning.
The device uses epitaxial base technology to achieve high fT and low Ccb (1.5 pF) while maintaining V(BR)CEO = 45 V and V(BR)CBO = 45 V - enabling stable operation in 24 V rail systems with transient margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - supports operation in 24 V automotive and industrial supply rails with ≥2× transient headroom |
| hFE (IC = 2 mA) | 100–110 - enables predictable DC bias design in emitter-follower and Class-A amplifier stages |
| VCE(sat) | ≤ 0.25 V @ IC = 10 mA - minimizes power loss and self-heating in driver applications |
| fT | 250 MHz - ensures sufficient gain-bandwidth for audio harmonics and EMI filtering stability |
| Ccb | 1.5 pF @ VCB = 10 V - reduces Miller effect in high-gain CE configurations |
| Noise Figure | 2 dB @ IC = 200 µA - meets low-noise requirements for microphone preamplifier front-ends |
| RthJS | ≤ 240 K/W - allows 330 mW dissipation at TS ≤ 71 °C in standard PCB layouts |
Pinout & Package
Package: SOT23 - surface-mount, 3-pin plastic package with JEDEC TO-236AB outline, footprint compatible with automated pick-and-place and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (B) | Base | Control terminal for forward-active bias; requires current-limited drive due to hFE-dependent base current |
| 2 (E) | Emitter | Common reference node in CE/CC configurations; connected to higher potential in PNP operation |
| 3 (C) | Collector | Output terminal sourcing current to load; reverse-biased during active operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements (HTOL, TC, HTRB) |
| Low VCE(sat) | ≤ 0.25 V at IC = 10 mA - reduces conduction loss in discrete driver stages |
| Group K hFE | 100–110 at IC = 2 mA - eliminates need for gain binning in production assemblies |
| RoHS-compliant | Pb-free SOT23 package - meets EU Directive 2011/65/EU and JESD204B assembly compatibility |
Applications
| Automotive Door Module Preamp | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Amplifying low-level analog signals from capacitive door-handle proximity sensors before ADC sampling. IC Role / Device Role / Timing Role: PNP-based common-emitter preamplifier stage providing 20 dB voltage gain with <2 dB noise contribution. Use Value: Enables reliable detection at 10 cm range using 3.3 V MCU supply, leveraging VCEO = 45 V headroom against load-dump transients. | Use Scenario: Level-shifting and buffering 4–20 mA loop sensor outputs into isolated analog inputs. IC Role / Device Role / Timing Role: Emitter-follower buffer with unity gain and high input impedance (>2.7 kΩ h11e). Use Value: Maintains signal integrity over 100 m cable runs by driving 1 nF capacitance without phase shift degradation. |
| Portable Audio Input Stage | Medical Pulse Oximeter Front-End |
Use Scenario: First-stage amplification of electret microphone output in battery-powered hearing aids. IC Role / Device Role / Timing Role: Low-noise, low-current PNP amplifier operating at IC = 200 µA with 2 dB noise figure. Use Value: Extends battery life beyond 120 hours while preserving SNR > 65 dB across 30 Hz–15 kHz bandwidth. | Use Scenario: Driving red/IR LED current sources with precise pulse-width modulation in compact wearable devices. IC Role / Device Role / Timing Role: Switched PNP current source controlling LED anode voltage with fast turn-off (toff < 50 ns). Use Value: Achieves <1% duty-cycle jitter using VCE(sat) ≤ 0.25 V and fT = 250 MHz for clean optical pulse edges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BCX71J E6327HTSA1 | hFE = 40–100 (group J) - lower and wider gain spread than K grade | Less suitable for precision bias networks requiring tight hFE tolerance | Select when cost sensitivity outweighs gain consistency needs |
| MMBT3906LT1G | VCEO = 40 V (vs. 45 V); hFE = 100–300 (wide spread); not AEC-Q101 qualified | Not recommended for automotive environments with load-dump or temperature cycling | Acceptable for consumer-grade non-automotive designs with relaxed reliability requirements |
Compared with BCX71JE6327HTSA1 and MMBT3906LT1G, BCX71KE6327HTSA1 offers tighter hFE control and automotive qualification - critical for repeatable performance in safety-critical signal paths where gain drift or field failure must be avoided.
Availability
BCX71KE6327HTSA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and portable medical devices requiring stable component supply and long-term lifecycle support.
Supply support for BCX71KE6327HTSA1 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and discrete components with global manufacturing and quality certification.
The BCX71 series belongs to Infineon's AEC-Q101-qualified small-signal transistor portfolio, engineered for robustness in automotive signal conditioning and industrial analog front-ends where reliability and parametric consistency are mandatory.
FAQ
What is the maximum continuous collector current for BCX71KE6327HTSA1?
The absolute maximum continuous collector current is 100 mA at TS ≤ 71 °C. At higher case temperatures, derating applies per the Ptot vs. TS curve - e.g., 60 mA at TS = 100 °C. Peak pulsed current reaches 200 mA for tp ≤ 10 ms with duty cycle ≤ 2%.
Is BCX71KE6327HTSA1 suitable for switching applications?
Yes - its VCE(sat) ≤ 0.25 V at IC = 10 mA and fT = 250 MHz support efficient low-power switching up to ~10 MHz. However, it is optimized for linear AF amplification; for high-speed digital switching, dedicated logic transistors like BCP53 offer faster ton/toff.
How does the hFE group K differ from other BCX71 variants?
Group K specifies hFE = 100–110 at IC = 2 mA and VCE = 5 V - narrower than group J (40–100) or group H (80–140). This tight spread simplifies bias network design and improves channel-to-channel matching in multi-transistor circuits.
Does BCX71KE6327HTSA1 require heatsinking in typical SOT23 PCB layouts?
No - with RthJS ≤ 240 K/W and Ptot = 330 mW at TS = 71 °C, standard 2-layer FR-4 PCBs with 10 mm² copper pour under the tab provide adequate thermal relief. Heatsinking is only needed above 200 mW sustained dissipation or in enclosed, high-ambient environments.
BCX71KE6327HTSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 550mV @ 1.25mA, 50mA
- Current - Collector Cutoff (Max):
- 20nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 380 @ 2mA, 5V
- Power - Max:
- 330 mW
- Frequency - Transition:
- 250MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT23
BCX71KE6327HTSA1 FAQ
1.How can I place an order for BCX71KE6327HTSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX71KE6327HTSA1 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 BCX71KE6327HTSA1 reliable?
The price and inventory of BCX71KE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX71KE6327HTSA1 is usually 5 days.
3.What payment methods are accepted for BCX71KE6327HTSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX71KE6327HTSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX71KE6327HTSA1?
BCX71KE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX71KE6327HTSA1 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 BCX71KE6327HTSA1?
For technical support, including BCX71KE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX71KE6327HTSA1 requirements.
6.How does Aetrix verify that BCX71KE6327HTSA1 is sourced from the original manufacturer or authorized distributors?
All BCX71KE6327HTSA1 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 BCX71KE6327HTSA1 meets industry standards.
7.What is the process for return or replacement of BCX71KE6327HTSA1?
All BCX71KE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCX71KE6327HTSA1, 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 BCX71KE6327HTSA1 part is unused and in its original packaging.
Return procedure for BCX71KE6327HTSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BCX71KE6327HTSA1 Tags
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