My Inquiry
My Account
Nexperia USA Inc. BCX70K,215
- Part No.:
- BCX70K,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BCX70K,215.pdf
- Description:
- TRANS NPN 45V 0.1A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,245
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BCX70K,215 from Nexperia is an NPN general-purpose bipolar junction transistor in SOT23 package, rated for 45 V VCEO, 100 mA IC, and featuring hFE of 380–630 at IC = 2 mA, used for low-power switching and small-signal amplification in consumer and industrial control circuits.
For engineers reviewing the BCX70K,215 datasheet, BCX70K,215 pinout, BCX70K,215 application, or BCX70K,215 equivalent, key selection criteria include DC current gain consistency across bias points, VCE(sat) at 50 mA, thermal resistance (500 K/W), and SOT23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The BCX70K operates as a silicon NPN BJT optimized for linear amplification and digital switching in ambient temperatures from −65 °C to +150 °C. Its hFE range (380–630 at IC = 2 mA) and low VCE(sat) (≤550 mV at IC = 50 mA) support stable gain and efficient on-state conduction in low-voltage logic interfaces.
Designed for FR4 PCB mounting, it exhibits Rth(j-a) = 500 K/W and maximum junction temperature of 150 °C. Its Cc = 1.7 pF and fT = 100–250 MHz enable use in audio-frequency amplifiers and low-speed digital signal routing without parasitic oscillation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage under open-base condition; defines upper rail limit in low-voltage switch designs. |
| IC (DC) | 100 mA - Continuous collector current rating; sets load-driving capability in relay drivers and LED buffers. |
| hFE @ IC=2 mA | 380–630 - High DC current gain ensures low base drive requirement in amplifier stages and saturated switches. |
| VCE(sat) @ 50 mA | 100–550 mV - Low saturation voltage minimizes power loss and self-heating in high-duty-cycle switching applications. |
| Rth(j-a) | 500 K/W - Thermal resistance value measured on FR4 board; informs derating needed above 25 °C ambient. |
| fT | 100–250 MHz - Transition frequency confirms suitability for audio-band amplification and sub-100 MHz digital signal conditioning. |
| Cc | 1.7 pF - Collector capacitance limits high-frequency feedback; supports stable operation in multi-stage CE amplifiers. |
Pinout & Package
SOT23 plastic surface-mounted package (TO-236AB), 3-lead, 1.3 mm × 2.9 mm footprint, 0.95 mm height, with gull-wing leads for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Current-controlled input node; requires series resistor to limit IB and ensure predictable hFE-based gain. |
| 2 | Emiter | Common reference terminal in common-emitter configuration; connected to ground or low-impedance return path. |
| 3 | Collector | Output current sink node; connects to load (e.g., resistor, LED, relay coil) referenced to positive supply. |
Key Features
| Feature | Design Value |
|---|---|
| High hFE consistency | 380–630 at IC = 2 mA enables reliable biasing with minimal base current variation across production lots. |
| Low VCE(sat) | ≤550 mV at IC = 50 mA reduces conduction loss and improves efficiency in battery-powered switch circuits. |
| Thermal robustness | Junction temperature rating up to 150 °C allows operation in enclosed industrial enclosures without forced cooling. |
| SOT23 standardization | JEDEC TO-236AB outline ensures compatibility with automated pick-and-place equipment and IPC-compliant reflow profiles. |
Applications
| Audio Pre-amplifier Stage | Microcontroller GPIO Driver |
|---|---|
Use Scenario: Amplifying weak microphone signals before ADC sampling in portable voice recorders. IC Role / Device Role / Timing Role: NPN common-emitter small-signal amplifier with fixed bias network. Use Value: High hFE (380–630) delivers sufficient voltage gain with minimal external components; low Cc prevents high-frequency roll-off. | Use Scenario: Driving LEDs or small relays from 3.3 V/5 V microcontroller outputs. IC Role / Device Role / Timing Role: Digital switch in saturated mode, controlled by MCU GPIO pin. Use Value: VCE(sat) ≤550 mV at 50 mA ensures <10 mW dissipation per switch; SOT23 footprint saves board area. |
| Power Supply Enable Circuit | Industrial Sensor Interface |
Use Scenario: Enabling/disabling auxiliary 5 V rail in programmable logic controllers based on system fault status. IC Role / Device Role / Timing Role: Low-side enable switch controlling PMOS gate pull-down path. Use Value: 45 V VCEO provides margin against transient spikes; 100 mA IC supports typical enable-current loads. | Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., thermistor voltage dividers) into ADC inputs. IC Role / Device Role / Timing Role: Emitter-follower buffer isolating high-impedance sensor from ADC input capacitance. Use Value: Low VBE (550–750 mV) ensures accurate DC offset tracking; fT > 100 MHz preserves signal integrity up to 10 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847BK,215 | Higher hFE (200–450 @ 2 mA), same SOT23, identical pinout. | Lower gain spread may simplify bias design in precision amplifiers. | Select when tighter hFE tolerance is required; not drop-in for BCX70K's 380–630 range. |
| MMBT3904LT1G | Same VCEO/IC, but hFE = 100–300 @ 10 mA; higher Cc (4 pF). | Lower fT (~300 MHz) and higher capacitance reduce suitability for >50 kHz AC-coupled gain stages. | Prefer for cost-sensitive high-volume logic switching where gain variation is less critical. |
Compared with BC847BK,215 and MMBT3904LT1G, BCX70K,215 offers the highest hFE among SOT23 NPN transistors in its class-critical for low-base-drive amplifier stages-while maintaining identical footprint and thermal performance.
Availability
BCX70K,215 is available at Aetrix Electronics and suitable for audio pre-amplifiers, microcontroller GPIO drivers, power supply enable circuits, and industrial sensor interfaces requiring stable component supply and long-term manufacturability.
Supply support for BCX70K,215 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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, with focus on automotive, industrial, computing, and consumer markets.
The BCX70 series belongs to Nexperia's general-purpose bipolar transistor product line, designed specifically for cost-effective, reliable switching and amplification in space-constrained, thermally moderate applications.
FAQ
What is the maximum continuous collector current for BCX70K,215?
The absolute maximum DC collector current is 100 mA, as specified in the Limiting Values table. Derating is required above Tamb = 25 °C per the Rth(j-a) = 500 K/W thermal resistance; at 75 °C ambient, max IC drops to approximately 62 mA to maintain Tj ≤ 150 °C.
Is BCX70K,215 pin-compatible with BCX71 series devices?
No-BCX71 series are PNP complements with identical SOT23 package and pinout (1=base, 2=emitter, 3=collector), but polarity reversal means direct substitution would invert circuit function. Use only as complementary pair in push-pull or differential configurations, not as drop-in replacements.
Does BCX70K,215 support pulsed operation beyond 100 mA?
Yes-peak collector current is rated at 200 mA for short pulses (tp ≤ 300 μs, duty cycle δ ≤ 0.02). This enables brief surge handling in relay coil snubbing or LED strobe circuits, provided average power remains within Ptot = 250 mW at the operating ambient temperature.
What marking code identifies BCX70K,215 on the device body?
The top-side marking is "AK*", where "AK" denotes the BCX70K type and "*" indicates manufacturing location: "p" = Hong Kong, "t" = Malaysia, "W" = China. This matches the official Nexperia pinning table and is laser-etched on the SOT23 package.
BCX70K,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- 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:
- 250 mW
- Frequency - Transition:
- 250MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BCX70K,215 FAQ
1.How can I place an order for BCX70K,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX70K,215 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 BCX70K,215 reliable?
The price and inventory of BCX70K,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX70K,215 is usually 5 days.
3.What payment methods are accepted for BCX70K,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX70K,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX70K,215?
BCX70K,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX70K,215 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 BCX70K,215?
For technical support, including BCX70K,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX70K,215 requirements.
6.How does Aetrix verify that BCX70K,215 is sourced from the original manufacturer or authorized distributors?
All BCX70K,215 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 BCX70K,215 meets industry standards.
7.What is the process for return or replacement of BCX70K,215?
All BCX70K,215 units undergo pre-shipment inspection (PSI). If there is an issue with BCX70K,215, 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 BCX70K,215 part is unused and in its original packaging.
Return procedure for BCX70K,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BCX70K,215 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
