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Nexperia USA Inc. BZT52H-C43-QX
- Part No.:
- BZT52H-C43-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C43-QX.pdf
- Description:
- DIODE ZENER 43V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:5,449
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Product details
Overview
BZT52H-C43-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 43 V nominal breakdown voltage at IZ = 2 mA, with 830 mW total power dissipation and AEC-Q101 qualification for automotive voltage regulation and reference applications.
For engineers reviewing the BZT52H-C43-QX datasheet, BZT52H-C43-QX pinout, BZT52H-C43-QX application, or BZT52H-C43-QX equivalent, this device serves as a precision voltage reference in low-power analog circuits, ECU power rail clamping, and sensor biasing where stable reverse-biased operation and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its terminals under controlled current conditions. Its differential resistance of 325 Ω at IZ = 2 mA and temperature coefficient of +0.05 mV/K ensure predictable regulation performance over temperature and load variations.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 40 A non-repetitive peak reverse current capability (tp = 100 μs) and junction-to-ambient thermal resistance of 330 K/W in free air, supporting robust transient suppression in automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 40.0 V to 46.0 V at IZ = 2 mA - defines usable regulation range for 43 V nominal design |
| Differential Resistance rdif | 325 Ω max at IZ = 2 mA - determines output impedance and regulation sensitivity to current changes |
| Reverse Current IR | 80 μA max at VR = 30.1 V - specifies leakage level below breakdown, critical for low-power standby circuits |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 layout |
| Junction Temperature Tj | −65 °C to +150 °C - enables operation in under-hood automotive environments without derating |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOD123F plastic surface-mounted package: 2-terminal, flat lead, small outline (3.6 mm × 1.7 mm × 1.0 mm), cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias polarity must be maintained for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % VZ tolerance | Enables cost-effective selection for non-critical reference applications without trimming circuitry |
| AEC-Q101 qualification | Validates suitability for automotive body control modules, lighting drivers, and infotainment power supplies |
| 830 mW power rating | Supports sustained regulation in 12 V/24 V automotive systems with minimal heatsinking |
| SOD123F footprint | Compatible with standard reflow soldering processes and high-density PCB layouts |
| 150 °C max junction temperature | Permits operation adjacent to power MOSFETs or microcontrollers in compact ECUs |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Bias Reference |
|---|---|
|
Use Scenario: Clamp transients on 5 V or 12 V microcontroller supply rails in engine control units during load dump events. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy and limit voltage excursion to ≤46 V. Use Value: Prevents MCU reset or latch-up by holding rail voltage within safe operating limits during ISO 7637-2 Pulse 5a surges. |
Use Scenario: Provide stable bias voltage for analog front-end amplifiers in temperature or pressure sensors. IC Role / Device Role / Timing Role: Precision voltage reference source delivering fixed 43 V to op-amp feedback networks. Use Value: Enables <1 % full-scale error in 16-bit ADC measurements despite ambient temperature swings from −40 °C to +125 °C. |
| Low-Power IoT Node Voltage Reference | LED Driver Overvoltage Protection |
|
Use Scenario: Generate accurate reference for battery monitoring ICs in wireless sensor nodes powered by Li-ion cells. IC Role / Device Role / Timing Role: Zener-based shunt regulator supplying clean 43 V reference to voltage supervisor circuits. Use Value: Maintains ±0.5 % reference stability over 10-year field life due to low IR drift and AEC-Q101 process controls. |
Use Scenario: Protect constant-current LED driver ICs from overvoltage during open-circuit fault conditions. IC Role / Device Role / Timing Role: Crowbar element that conducts when output exceeds 46 V, triggering driver shutdown. Use Value: Limits fault energy to <100 mJ per event, preventing gate oxide damage in integrated MOSFET drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B43-Q | ±2 % VZ tolerance, 300 Ω rdif at IZ = 2 mA | Higher precision needed for feedback loops in switching regulators | Select when tighter regulation accuracy outweighs cost sensitivity |
| MMBZ5243B-7-F | ±5 % VZ, SOT-23 package, 350 mW Ptot, 400 Ω rdif | Lower power handling and smaller footprint for space-constrained consumer designs | Choose for portable electronics where board area is prioritized over automotive qualification |
Compared with BZT52H-C43-QX, the BZT52H-B43-Q offers improved voltage accuracy at higher cost, while MMBZ5243B-7-F sacrifices AEC-Q101 compliance and power rating for miniaturization-making the C43-QX optimal for cost-sensitive, thermally demanding automotive voltage clamping.
Availability
BZT52H-C43-QX is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor conditioning, and LED driver protection requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZT52H-C43-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 manufacturer specializing in high-volume logic, analog, and discrete components, with leadership in automotive-qualified devices.
The BZT52H-Q series targets automotive and industrial voltage regulation applications, delivering AEC-Q101-compliant Zener diodes with extended voltage range (2.4 V–75 V) and three precision grades in compact SMD packages.
FAQ
What is the maximum reverse current the BZT52H-C43-QX can handle in surge conditions?
The BZT52H-C43-QX supports a non-repetitive peak reverse current of 0.6 A for 100 μs pulses at 25 °C ambient, verified per IEC 60134 limiting values. This enables transient suppression in automotive load-dump scenarios without permanent degradation, provided average power remains within the 830 mW thermal limit.
How does the ±5 % tolerance affect regulation accuracy in a 43 V reference circuit?
At nominal 43 V, the ±5 % tolerance means actual VZ falls between 40.0 V and 46.0 V at IZ = 2 mA. For applications requiring tighter regulation, designers must account for this 6 V window in feedback loop design or add post-regulation filtering-no internal trimming or calibration is provided.
Is the SOD123F package compatible with standard reflow soldering profiles?
Yes-the SOD123F package is qualified for lead-free reflow soldering per J-STD-020. The recommended profile uses peak temperatures up to 260 °C for ≤30 seconds, with ramp rates ≤3 °C/s. Thermal resistance data assumes mounting on FR4 with 1 cm² cathode pad, so PCB layout must match this condition for rated power handling.
Does the BZT52H-C43-QX require external series resistance in typical Zener applications?
Yes-a current-limiting resistor is mandatory to set IZ within the 2 mA to 250 mA operating range and prevent thermal runaway. For example, with 48 V input and target IZ = 5 mA, a 1 kΩ resistor ensures stable 43 V regulation while dissipating <25 mW, keeping total power within the 830 mW limit.
BZT52H-C43-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±6.98%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 30.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-C43-QX FAQ
1.How can I place an order for BZT52H-C43-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C43-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 BZT52H-C43-QX reliable?
The price and inventory of BZT52H-C43-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-C43-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C43-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C43-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C43-QX?
BZT52H-C43-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C43-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 BZT52H-C43-QX?
For technical support, including BZT52H-C43-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C43-QX requirements.
6.How does Aetrix verify that BZT52H-C43-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C43-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 BZT52H-C43-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C43-QX?
All BZT52H-C43-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C43-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 BZT52H-C43-QX part is unused and in its original packaging.
Return procedure for BZT52H-C43-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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