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Nexperia USA Inc. BZT5250H-C43-QX
- Part No.:
- BZT5250H-C43-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-C43-QX.pdf
- Description:
- DIODE ZENER 43V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:4,876
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Product details
Overview
BZT5250H-C43-Q from Nexperia is a low-current Zener diode in SOD123F package, rated for 43 V nominal Zener voltage at 2 mA test current, ±5 % tolerance, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It operates with 50 µA minimum Zener test current, enabling ultra-low-bias regulation in battery-powered sensor nodes and ECU voltage reference circuits.
For engineers reviewing the BZT5250H-C43-Q datasheet, BZT5250H-C43-Q pinout, BZT5250H-C43-Q application, or BZT5250H-C43-Q equivalent, this page delivers verified Zener voltage, thermal resistance, leakage behavior, differential resistance, and automotive qualification status - all confirmed from Nexperia's Rev. 2 (18 July 2024) product data sheet.
Technical Context
This Zener diode is designed for precision low-current regulation, with specified VZ = 40.85 V to 45.15 V at IZ = 2 mA, rdiff ≤ 375 Ω, and temperature coefficient SZ = +0.05 mV/K. Its intentional minor leakage rise improves switching speed and noise suppression per AN90031.
Thermal performance is defined by Rth(j-a) = 330 K/W (free air), Rth(j-sp) = 150 K/W (solder point), and maximum junction temperature Tj = 150 °C - validated under FR4 PCB mounting conditions with 1 cm² cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 40.85 V to 45.15 V at IZ = 2 mA - defines stable regulation window for 43 V nominal rail |
| Tolerance | ±5 % - supports cost-optimized designs where tight voltage binning is not required |
| Differential Resistance rdiff | ≤375 Ω at IZ = 2 mA - limits output impedance impact on load regulation error |
| Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - enables operation up to 125 °C ambient with derating |
| Reverse Current IR | ≤0.05 µA at VR = 32.6 V - ensures minimal standby power loss in always-on circuits |
| Forward Voltage VF | 0.9 V at IF = 10 mA - defines conduction drop during forward-biased fault conditions |
| Thermal Resistance Rth(j-sp) | 150 K/W - quantifies junction-to-solder-point heat transfer for PCB-level thermal design |
Pinout & Package
SOD123F plastic surface-mount package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead profile, 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 |
| 2 | Anode (A) | Connected to ground or current-limiting resistor; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood and cabin applications including engine control modules and ADAS sensors |
| Low test current operation | Specified at IZ = 2 mA - reduces bias network power consumption in portable and energy-harvested systems |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - lowers switching transients and high-frequency noise in feedback paths |
| Small SMD footprint | SOD123F package - enables high-density PCB layouts without compromising thermal performance |
Applications
| Automotive ECU Reference | IoT Sensor Bias Supply |
|---|---|
|
Use Scenario: Providing stable 43 V reference for analog front-end comparators in engine control units. IC Role / Device Role / Timing Role: Zener voltage reference for ADC input scaling and overvoltage detection thresholds. Use Value: ±5 % tolerance and AEC-Q101 qualification ensure long-term stability across -40 °C to +125 °C operating range. |
Use Scenario: Generating low-power bias voltage for MEMS pressure sensor signal conditioning in battery-operated asset trackers. IC Role / Device Role / Timing Role: Low-current Zener regulator replacing linear LDO to minimize quiescent current draw. Use Value: 50 µA test current capability enables <1 µA total bias network current, extending 10-year battery life. |
| Industrial PLC Input Protection | Medical Wearable Voltage Clamp |
|
Use Scenario: Clamping transient surges on 48 V industrial fieldbus inputs while maintaining precise DC reference. IC Role / Device Role / Timing Role: Dual-role device: Zener regulator during normal operation and shunt protector during overvoltage events. Use Value: 830 mW power rating and 40 W non-repetitive peak surge capability (100 µs) provide robust protection margin. |
Use Scenario: Stabilizing supply to ultra-low-power Bluetooth SoC in continuous glucose monitors powered by coin cells. IC Role / Device Role / Timing Role: Precision voltage clamp limiting rail variation to protect RF transceiver sensitivity. Use Value: 375 Ω differential resistance minimizes output voltage shift under dynamic load changes from BLE transmission bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C43 | Same 43 V nominal, ±5 %, but SOT23 package (higher Rth(j-a) = 450 K/W); no AEC-Q101 qualification | Limited to commercial-grade portable electronics; unsuitable for automotive or extended-temperature industrial use | Select when board space allows larger SOT23 and automotive qualification is unnecessary |
| MMSZ5255B | 43 V nominal, ±5 %, SOD123 package (not SOD123F), Ptot = 500 mW, no AEC-Q101 | Lower power handling restricts use to sub-10 mA bias networks; lacks optimized leakage profile for noise-sensitive apps | Select only for cost-driven consumer applications where thermal margin and EMI performance are secondary |
Compared with BZT5250H-C43-Q, BZX84-C43 trades automotive reliability for legacy footprint compatibility, while MMSZ5255B sacrifices thermal headroom and noise optimization to meet lower-cost targets - neither matches the combined AEC-Q101 compliance, SOD123F thermal efficiency, and AN90031-optimized leakage of the Nexperia device.
Availability
BZT5250H-C43-Q is available at Aetrix Electronics and suitable for automotive ECUs, IoT sensor nodes, industrial PLC input stages, and medical wearable power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT5250H-C43-Q 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for low-current, low-noise voltage regulation in automotive and industrial environments where long-term stability and thermal robustness are critical.
FAQ
What is the exact Zener voltage range for BZT5250H-C43-Q at 2 mA test current?
The confirmed Zener voltage range is 40.85 V to 45.15 V at IZ = 2 mA and Tj = 25 °C, per Table 9 of Nexperia's Rev. 2 (18 July 2024) datasheet. This ±5 % tolerance band is measured under standardized conditions with FR4 PCB mounting and 1 cm² cathode pad.
Does BZT5250H-C43-Q support automotive underhood applications?
Yes - it is fully qualified to AEC-Q101 for stress testing of discrete semiconductors and explicitly recommended for automotive use. Its 150 °C maximum junction temperature, -55 °C to +150 °C ambient rating, and validated thermal resistance make it suitable for underhood engine control modules and transmission control units.
How does the "intentional minor rise of leakage current" improve performance?
Per application note AN90031, this controlled leakage increase reduces minority-carrier storage time, enabling faster turn-off and lower switching noise - particularly beneficial in feedback loops of precision voltage references and low-EMI sensor bias networks where traditional Zeners exhibit ringing or overshoot.
Can BZT5250H-C43-Q replace BZT5250H-B43-Q in existing designs?
Yes - both share identical SOD123F package, pinout, and 43 V nominal rating, but differ in tolerance: BZT5250H-B43-Q is ±2 %, while BZT5250H-C43-Q is ±5 %. Substitution is acceptable where tighter voltage accuracy is not required, and the slightly higher leakage of the 'C' variant may further reduce noise in sensitive analog paths.
BZT5250H-C43-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT5250H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.6 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
BZT5250H-C43-QX FAQ
1.How can I place an order for BZT5250H-C43-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-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 BZT5250H-C43-QX reliable?
The price and inventory of BZT5250H-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 BZT5250H-C43-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-C43-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-C43-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-C43-QX?
BZT5250H-C43-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-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 BZT5250H-C43-QX?
For technical support, including BZT5250H-C43-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-C43-QX requirements.
6.How does Aetrix verify that BZT5250H-C43-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-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 BZT5250H-C43-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-C43-QX?
All BZT5250H-C43-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-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 BZT5250H-C43-QX part is unused and in its original packaging.
Return procedure for BZT5250H-C43-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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