My Inquiry
My Account
Nexperia USA Inc. PBSS303NX-QX
- Part No.:
- PBSS303NX-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
PBSS303NX-QX.pdf
- Description:
- TRANS NPN 30V 5.1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:3,126
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PBSS303NX-QX from Nexperia is an AEC-Q101-qualified NPN low VCE(sat) transistor in SOT89 package, designed for high-efficiency switching in automotive power stages. It delivers 5.1 A continuous collector current, 30 V VCEO, and typ. 31 mΩ RCE(sat) at IC = 4 A / IB = 200 mA - enabling compact DC-DC converters and MOSFET gate drivers with reduced conduction loss.
For engineers reviewing the PBSS303NX-QX datasheet, PBSS303NX-QX pinout, PBSS303NX-QX application, or PBSS303NX-QX equivalent, this device is selected for automotive-grade power switching where low saturation voltage, thermal robustness on FR4 PCBs, and validated AEC-Q101 reliability are mandatory design requirements.
Technical Context
This NPN transistor operates as a high-current, low-loss switch in linear and saturated modes. Its architecture prioritizes minimal VCE(sat) across IC = 0.5–6 A range and supports fast switching with ton = 65 ns and toff = 375 ns under 12.5 V/3 A test conditions.
Thermal performance is defined across three mounting configurations: Rth(j-a) = 208 K/W (standard FR4), 76 K/W (FR4 with 6 cm² collector pad), and 60 K/W (ceramic Al₂O₃). Junction temperature is rated to 150 °C, supporting operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 30 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in 24 V automotive systems. |
| IC | 5.1 A continuous - Sustained current-handling capability at Tamb ≤ 25 °C on standard FR4; enables direct drive of small motors or charging FETs. |
| RCE(sat) | 31–44 mΩ at IC = 4 A / IB = 200 mA - Low on-resistance reduces I²R loss and board-level heating in high-duty-cycle switching. |
| hFE | 180–270 at IC = 6 A - High DC current gain ensures stable saturation with modest base drive, easing MCU GPIO interface design. |
| toff | 375 ns - Fast turn-off time minimizes switching overlap loss in synchronous buck or half-bridge topologies. |
| Tj max | 150 °C - Maximum junction temperature rating confirms suitability for under-dash and engine-compartment applications. |
| AEC-Q101 | Qualified - Validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and ESD per AEC standard. |
Pinout & Package
SOT89 (SC-62/TO-243) plastic surface-mount package: 4.5 mm × 2.5 mm × 1.5 mm body, 1.5 mm lead pitch, flat leads optimized for thermal conduction via collector tab soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter (E) | Current return path; connected to ground or low-side reference; requires low-inductance layout for switching stability. |
| 2 | Collector (C) | Main power output terminal; large copper pad required for thermal dissipation; electrically tied to load high-side node. |
| 3 | Base (B) | Control input; driven by logic-level signal or dedicated driver; series resistor needed to limit IB to 200–400 mA for full saturation. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | 150–220 mV at IC = 5.1 A / IB = 255 mA - Enables >95% efficiency in 12 V load-switching applications with <0.5 W conduction loss. |
| AEC-Q101 qualification | Validated for automotive use - Covers temperature cycling, humidity bias, and mechanical shock tests required for Tier-1 supply chain compliance. |
| High ICM | 10.2 A peak (1 ms pulse) - Supports surge currents during motor startup or capacitor inrush without secondary protection. |
| Thermal resistance control | Rth(j-sp) = 20 K/W - Direct junction-to-solder-point path allows predictable thermal modeling when mounted on thermally enhanced pads. |
| Small PCB footprint | 4.5 mm × 2.5 mm - Reduces board area by ~40% vs. TO-220 equivalents while maintaining comparable current rating. |
Applications
| DC-DC Converter Switch | MOSFET Gate Driver |
|---|---|
|
Use Scenario: Primary-side switch in non-isolated buck converter for 12 V → 5 V/3.3 V regulation in automotive infotainment modules. IC Role / Device Role / Timing Role: High-side NPN switch controlling energy transfer into inductor; operates at 250–500 kHz with precise duty-cycle control. Use Value: 31 mΩ RCE(sat) limits conduction loss to <0.65 W at 4 A, reducing heatsink requirement and improving power density. |
Use Scenario: Level-shifting and current-boosting stage driving high-capacitance N-channel MOSFET gates in BLDC motor controllers. IC Role / Device Role / Timing Role: Saturated switch providing 400 mA peak base current to rapidly charge/discharge gate capacitance. Use Value: 375 ns toff and 65 ns ton ensure clean gate transitions, minimizing shoot-through risk in half-bridge configurations. |
| Automotive Fan Control | USB-C Charging Switch |
|
Use Scenario: PWM-controlled 12 V cooling fan in ADAS camera housing requiring silent, reliable speed regulation. IC Role / Device Role / Timing Role: Low-side switching element modulating fan current; handles 3–5 A average load with 100% duty cycle capability. Use Value: AEC-Q101 qualification and 150 °C Tj rating guarantee uninterrupted operation at 85 °C ambient under hood. |
Use Scenario: Input power switch in automotive USB-C PD sink circuit managing up to 3 A @ 9 V for fast charging. IC Role / Device Role / Timing Role: Load switch enabling/disabling VBUS path; controlled by microcontroller GPIO with integrated reverse-voltage protection. Use Value: 30 V VCEO provides 2× margin over 15 V max PD voltage, eliminating need for external clamping diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN low VCE(sat) transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS30300MZ4T1G | VCEO = 30 V, IC = 3 A, RCE(sat) = 45 mΩ (IC = 2 A); SOT-23 package | Lower current rating and higher RCE(sat); unsuitable for >3 A continuous loads | Select only for space-constrained, sub-3 A applications where SOT-23 footprint is mandatory. |
| Diodes Incorporated DXT30300QE-7 | VCEO = 30 V, IC = 4.5 A, RCE(sat) = 35 mΩ (IC = 4 A); SOT-89 package, AEC-Q101 qualified | 0.6 A lower IC rating and slightly higher saturation resistance; identical thermal profile | Acceptable drop-in for designs with margin on current and thermal headroom; verify hFE consistency at 5 A. |
Compared with PBSS303NX-QX, NSS30300MZ4T1G trades current capacity for smaller size, while DXT30300QE-7 matches the SOT89 form factor but delivers 12% less continuous current and 13% higher conduction loss - making PBSS303NX-QX optimal for 4–5 A automotive switching where both thermal and electrical margins are critical.
Availability
PBSS303NX-QX is available at Aetrix Electronics and suitable for automotive fan control, DC-DC converter switches, MOSFET gate drivers, and USB-C charging circuits requiring stable component supply across production lifecycles.
Supply support for PBSS303NX-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 focused on essential efficiency-enhancing components, delivering high-performance, high-reliability devices for automotive, industrial, and consumer markets.
PBSS303NX-QX belongs to Nexperia's Automotive Logic and Power portfolio, engineered specifically for robust, low-loss power switching in harsh-environment automotive subsystems such as body control modules and ADAS power supplies.
FAQ
What is the maximum allowable base current for sustained operation?
The datasheet specifies IB = 200 mA for RCE(sat) characterization and IB = 255 mA for VCE(sat) at IC = 5.1 A. Continuous base current must not exceed 255 mA to maintain saturation and avoid thermal runaway; pulsed base drive may reach 400 mA for <300 µs durations with duty cycle ≤ 2%.
Can PBSS303NX-QX replace a PNP transistor like PBSS303PX-Q in the same circuit?
No - PBSS303NX-QX is an NPN device requiring positive base-emitter bias, while PBSS303PX-Q is its complementary PNP counterpart with opposite polarity and mirrored pinout. Direct substitution would invert logic and cause circuit failure; redesign of bias network and layout is mandatory for topology change.
Is the SOT89 package lead-free and RoHS compliant?
Yes - PBSS303NX-QX uses lead-free (Pb-free) terminations and complies with EU RoHS Directive 2011/65/EU and China RoHS. The package meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1, allowing unlimited floor life at ≤30 °C/60% RH.
How does thermal performance differ between FR4 and ceramic PCB mounting?
On standard FR4, Rth(j-a) = 208 K/W limits usable power to ~0.6 W at 25 °C ambient; with a 6 cm² collector pad, it improves to 76 K/W (~1.65 W). On Al₂O₃ ceramic, Rth(j-a) drops to 60 K/W, enabling 2.1 W dissipation - a 3.5× thermal improvement critical for sealed enclosures without forced airflow.
PBSS303NX-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 5.1 A
- Voltage - Collector Emitter Breakdown (Max):
- 30 V
- Vce Saturation (Max) @ Ib, Ic:
- 250mV @ 40mA, 4A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 1A, 2V
- Power - Max:
- 600 mW
- Frequency - Transition:
- 130MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
PBSS303NX-QX FAQ
1.How can I place an order for PBSS303NX-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PBSS303NX-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 PBSS303NX-QX reliable?
The price and inventory of PBSS303NX-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS303NX-QX is usually 5 days.
3.What payment methods are accepted for PBSS303NX-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS303NX-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBSS303NX-QX?
PBSS303NX-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBSS303NX-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 PBSS303NX-QX?
For technical support, including PBSS303NX-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS303NX-QX requirements.
6.How does Aetrix verify that PBSS303NX-QX is sourced from the original manufacturer or authorized distributors?
All PBSS303NX-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 PBSS303NX-QX meets industry standards.
7.What is the process for return or replacement of PBSS303NX-QX?
All PBSS303NX-QX units undergo pre-shipment inspection (PSI). If there is an issue with PBSS303NX-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 PBSS303NX-QX part is unused and in its original packaging.
Return procedure for PBSS303NX-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PBSS303NX-QX 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…
