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Nexperia USA Inc. BSP52-QX
- Part No.:
- BSP52-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
BSP52-QX.pdf
- Description:
- TRANS NPN DARL 80V 1A SOT-223
- Quantity:
- Payment:
- Shipping:
Inventory:2,604
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Product details
Overview
BSP52-QX from Nexperia is an AEC-Q101-qualified NPN Darlington transistor in SOT223 (SC-73) package, delivering 1 A continuous collector current, 80 V VCES, and DC current gain (hFE) ≥1000 at IC = 150 mA. It integrates base-emitter clamping diode and base resistor, enabling direct logic-level drive in high-gain switching applications such as automotive window lift control.
For engineers reviewing the BSP52-QX datasheet, BSP52-QX pinout, BSP52-QX application, or BSP52-QX equivalent, key selection criteria include verified thermal resistance (Rth(j-sp) = 17 K/W), guaranteed VCE(sat) ≤1.3 V at IC = 500 mA / IB = 0.5 mA, AEC-Q101 qualification status, and dual-collector SOT223 pin configuration for enhanced power dissipation.
Technical Context
The BSP52-QX implements a monolithic NPN Darlington pair with integrated base resistor and emitter-clamp diode, reducing external component count in driver circuits. Its architecture supports low-input-current switching (IBlim = 100 mA max) while maintaining robust safe-operating-area (SOA) up to Tj = 150 °C.
Thermal design is enabled by the SOT223's exposed collector pad, delivering Rth(j-a) = 96 K/W on FR4 PCB and Rth(j-sp) = 17 K/W to solder point-critical for automotive under-hood ambient temperatures up to +105 °C and transient load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCES | 80 V - Maximum sustainable collector-emitter voltage with base shorted to emitter; defines safe blocking capability in relay/actuator drive. |
| IC | 1 A - Continuous DC collector current rating; enables direct driving of 12 V solenoids or small motors without heatsink at Tamb ≤ 70 °C. |
| hFE | ≥1000 @ VCE = 10 V, IC = 150 mA - High DC gain reduces required base drive current, simplifying microcontroller GPIO interface. |
| VCE(sat) | ≤1.3 V @ IC = 500 mA, IB = 0.5 mA, Tj = 150 °C - Low saturation voltage minimizes power loss (Psat ≤ 0.65 W) in high-duty-cycle switching. |
| Rth(j-sp) | 17 K/W - Junction-to-solder-point thermal resistance; enables accurate thermal modeling when mounted on standard 1 cm² copper pad. |
| toff | 1300 ns - Measured turn-off time under defined test conditions (IBoff = −0.5 mA); supports PWM frequencies up to ~300 kHz in soft-switching designs. |
Pinout & Package
Package: SC-73 (SOT223) plastic surface-mount package with thermally enhanced 4-lead configuration; body dimensions 6.5 mm × 3.5 mm × 1.65 mm; exposed collector pad for thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control input terminal; internally connected to base resistor network for logic-level compatibility. |
| 2 | Collector (C) | Main power output terminal; electrically and thermally tied to exposed metal tab (Pin 4). |
| 3 | Emiter (E) | Current return path; common reference for load connection in low-side switch topology. |
| 4 | Collector (C) | Duplicate collector terminal; provides second solder point to enhance thermal transfer and mechanical reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated base resistor | Enables direct 3.3 V/5 V MCU GPIO drive without external biasing components. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22-A114. |
| Dual-collector thermal path | Pins 2 and 4 both connect to collector and exposed pad, lowering effective Rth(j-a) by ~25% vs. standard SOT223. |
| Clamped emitter-base junction | Integrated diode prevents reverse-bias damage during inductive load flyback events. |
Applications
| Automotive Power Window Control | Industrial PLC Output Stage |
|---|---|
|
Use Scenario: Bidirectional DC motor control for vehicle window lift/lower functions with overcurrent and thermal protection. IC Role / Device Role / Timing Role: Low-side Darlington switch providing high-current (≤1 A), low-VCE(sat) switching with integrated clamp diode for inductive kick suppression. Use Value: Eliminates need for external flyback diode and base resistor, reducing BOM count and PCB area while meeting ISO 16750-2 pulse test requirements. |
Use Scenario: Solid-state replacement for electromechanical relays in programmable logic controller (PLC) digital output modules. IC Role / Device Role / Timing Role: High-gain switching element interfacing 24 V DC field loads (solenoids, indicators) with isolated microcontroller outputs. Use Value: Delivers >1000× current gain to reduce isolation driver complexity; Rth(j-sp) = 17 K/W ensures stable operation across industrial temperature range (−40 °C to +85 °C). |
| LED Driver for Automotive Lighting | High-Gain Sensor Signal Amplifier |
|
Use Scenario: Constant-current dimming stage for interior LED map lights and courtesy lamps in 12 V automotive systems. IC Role / Device Role / Timing Role: Linear-mode current regulator using emitter-follower configuration with precision base biasing. Use Value: VCE(sat) ≤1.3 V allows ≥10.7 V headroom at 12 V supply, supporting wide forward-voltage LED strings without excessive heat generation. |
Use Scenario: Front-end amplification of low-level analog signals from pressure or temperature sensors in engine control units. IC Role / Device Role / Timing Role: High-hFE preamplifier stage boosting weak sensor currents before ADC sampling. Use Value: hFE ≥2000 at IC = 500 mA enables ultra-low-noise signal conditioning with minimal base current injection error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX1051A | Higher VCEO = 100 V but no AEC-Q101 qualification; hFE = 500–1000 (lower gain); SOT89 package. | Lacks automotive qualification; unsuitable for safety-critical vehicle subsystems requiring AEC compliance. | Select only for non-automotive industrial use where higher voltage margin outweighs qualification needs. |
| BSP51-Q | PNP complement with identical package, thermal specs, and AEC-Q101 rating; VCEO = −80 V, IC = −1 A. | Used in high-side or complementary push-pull configurations-not drop-in replacement for NPN topology. | Choose for complementary switching pairs in H-bridge or dual-rail driver designs requiring matched thermal and qualification profiles. |
Compared with ZTX1051A and BSP51-Q, the BSP52-QX uniquely combines AEC-Q101 qualification, dual-collector thermal enhancement, and guaranteed hFE ≥1000 in a single NPN device-making it optimal for space-constrained, thermally demanding automotive switches where reliability and gain consistency are critical.
Availability
BSP52-QX is available at Aetrix Electronics and suitable for automotive power window control, industrial PLC output stages, and LED driver modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BSP52-QX 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 semiconductor expert specializing in high-performance, reliable discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BSP52-QX belongs to Nexperia's AEC-Q101-qualified bipolar transistor portfolio, engineered specifically for robust, high-gain switching in automotive body electronics and industrial control systems where thermal resilience and qualification integrity are mandatory.
FAQ
Is BSP52-QX pin-compatible with standard SOT223 transistors?
No-BSP52-QX uses a 4-pin SC-73 variant with duplicated collector terminals (Pins 2 and 4), unlike generic 3-pin SOT223. PCB layout must allocate separate pads for both collector pins to ensure proper thermal and electrical performance; misalignment risks thermal derating and SOA violation.
What is the maximum allowable base drive current for continuous operation?
The absolute maximum limiting base current (IBlim) is 100 mA per Nexperia's limiting values table. For reliable 1 A collector current, recommended base drive is 0.5–1 mA (due to hFE ≥1000); exceeding 100 mA risks permanent degradation of internal resistor and junction integrity.
Does BSP52-QX require an external flyback diode when driving inductive loads?
No-the device integrates an emitter-base clamping diode that provides intrinsic protection against inductive flyback voltage spikes. This eliminates the need for an external diode in most 12 V automotive solenoid or motor applications, confirmed by Nexperia's test circuit validation in Figure 3.
How does thermal performance change when only Pin 2 (not Pin 4) is soldered?
Using only Pin 2 reduces thermal conduction area by ~50%, increasing Rth(j-sp) from 17 K/W to approximately 30–35 K/W. This degrades power handling: at 1 A, junction temperature rise increases by ~18–22 °C, potentially violating the 150 °C Tj limit under high ambient conditions.
BSP52-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Darlington
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 80 V
- Vce Saturation (Max) @ Ib, Ic:
- 1.3V @ 500µA, 500mA
- Current - Collector Cutoff (Max):
- 50nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 2000 @ 500mA, 10V
- Power - Max:
- 1.25 W
- Frequency - Transition:
- 200MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223
BSP52-QX FAQ
1.How can I place an order for BSP52-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BSP52-QX 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 BSP52-QX reliable?
The price and inventory of BSP52-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSP52-QX is usually 5 days.
3.What payment methods are accepted for BSP52-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSP52-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BSP52-QX?
BSP52-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BSP52-QX 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 BSP52-QX?
For technical support, including BSP52-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSP52-QX requirements.
6.How does Aetrix verify that BSP52-QX is sourced from the original manufacturer or authorized distributors?
All BSP52-QX 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 BSP52-QX meets industry standards.
7.What is the process for return or replacement of BSP52-QX?
All BSP52-QX units undergo pre-shipment inspection (PSI). If there is an issue with BSP52-QX, 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 BSP52-QX part is unused and in its original packaging.
Return procedure for BSP52-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BSP52-QX Tags
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