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Nexperia USA Inc. BZT5250H-B12-QX
- Part No.:
- BZT5250H-B12-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B12-QX.pdf
- Description:
- DIODE ZENER 12V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:3,447
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Product details
Overview
BZT5250H-B12-QX from Nexperia is a low-current Zener diode in SOD123F package, designed for precision voltage regulation at 12 V nominal Zener voltage (11.8–12.2 V), ±2 % tolerance, with 50 µA test current and 150 Ω typical differential resistance at IZ = 5 mA. It delivers stable reference voltage in automotive body control modules, sensor biasing circuits, and low-power microcontroller reset supervision.
For engineers reviewing the BZT5250H-B12-QX datasheet, BZT5250H-B12-QX pinout, BZT5250H-B12-QX application, or BZT5250H-B12-QX equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, and real-world use context for low-bias, battery-sensitive designs.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified VZ of 11.8–12.2 V at IZ = 50 µA, exhibiting a temperature coefficient of +6.0 mV/K and 150 Ω differential resistance at 5 mA. Its low leakage design supports fast switching and noise reduction per AN90031.
Qualified to AEC-Q101, it sustains junction temperatures up to 150 °C and ambient operating range from −55 °C to +150 °C. Thermal resistance from junction to solder point is 150 K/W on FR4 PCB with tin-plated cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 11.8–12.2 V at IZ = 50 µA - precise low-current regulation point for reference generation |
| Tolerance | ±2 % - tight voltage accuracy enabling reliable reset threshold or ADC reference |
| Differential Resistance rdiff | 150 Ω max at IZ = 5 mA - low dynamic impedance ensures stable output under small load variations |
| Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - sufficient headroom for transient surges in compact SMD layout |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - enables predictable forward conduction during polarity-reversal protection |
| Reverse Current IR | 0.05 µA max at VR = 9.1 V - ultra-low leakage preserves battery life in always-on circuits |
| Thermal Resistance Rth(j-sp) | 150 K/W - quantifies thermal path efficiency from junction to cathode solder point on standard FR4 |
Pinout & Package
SOD123F surface-mount plastic package: 2.6 mm × 1.6 mm × 1.1 mm body, flat leads, cathode marked by bar.
| 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; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and cabin applications including BCM, lighting control, and sensor interfaces |
| Low test current (50 µA) | Enables regulation in micropower systems where supply current must remain below 100 µA |
| Optimized leakage profile | Intentionally elevated leakage improves switching speed and reduces high-frequency noise per AN90031 |
| Small SOD123F footprint | Reduces PCB area by >40% vs. DO-35; compatible with automated reflow assembly and high-density routing |
Applications
| Automotive Body Control Module | Portable Gas Sensor Biasing |
|---|---|
Use Scenario: Providing stable 12 V reference for LIN transceiver voltage monitoring and microcontroller brown-out detection. IC Role / Device Role / Timing Role: Zener voltage reference element in power supervisor circuit, directly setting reset threshold. Use Value: ±2 % tolerance ensures consistent reset behavior across temperature and unit variance, critical for ASIL-B functional safety compliance. |
Use Scenario: Supplying calibrated bias voltage to electrochemical gas sensing elements powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current Zener regulator establishing fixed anode potential for sensor electrode polarization. Use Value: 50 µA test current and 0.05 µA leakage minimize quiescent drain, extending 10-year battery life in wireless IoT deployments. |
| Industrial PLC Input Protection | Medical Wearable Power Sequencing |
Use Scenario: Clamping transient overvoltage on 24 V digital input channels exposed to inductive load switching. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as precision shunt clamp, limiting input voltage to 12.2 V maximum. Use Value: 150 Ω rdiff ensures clamping voltage stays within 100 mV of nominal during surge events, protecting downstream logic. |
Use Scenario: Generating clean 12 V intermediate rail for analog front-end sequencing before main MCU activation. IC Role / Device Role / Timing Role: Standby-mode Zener reference feeding low-dropout regulator enable comparator. Use Value: AEC-Q101 qualification guarantees reliability in continuous-use medical devices requiring >100,000-hour field lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12 | ±5 % tolerance, 600 Ω rdiff, SOT23 package, no AEC-Q101 qualification | Higher voltage drift and impedance limit use in precision reset or sensor biasing | Select only for cost-sensitive non-automotive consumer applications with relaxed accuracy |
| MMSZ5242B | ±5 % tolerance, 17 Ω rdiff at 20 mA, SOD123 package, not AEC-Q101 qualified | Lower impedance but higher test current (20 mA) increases quiescent power in battery systems | Prefer when high-current regulation is needed and automotive qualification is unnecessary |
Compared with BZT5250H-B12-QX, BZX84-C12 trades accuracy and qualification for cost, while MMSZ5242B offers lower impedance at the expense of higher bias current and no automotive validation-making the BZT5250H-B12-QX uniquely suited for AEC-compliant, low-power, precision voltage references.
Availability
BZT5250H-B12-QX is available at Aetrix Electronics and suitable for automotive electronics, portable sensor systems, and industrial PLC input protection requiring stable component supply with guaranteed long-term availability.
Supply support for BZT5250H-B12-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current, low-noise voltage regulation in automotive and portable industrial electronics.
FAQ
What is the maximum reverse voltage rating before breakdown for BZT5250H-B12-QX?
The device has no defined "maximum reverse voltage" prior to breakdown-it is a Zener diode designed to operate in controlled reverse breakdown. Its rated Zener voltage is 11.8–12.2 V at 50 µA, and it begins regulating above ~11.5 V. Absolute maximum reverse voltage is not specified; operation beyond VZ + 10% risks exceeding power limits.
Can BZT5250H-B12-QX be used in place of a 12 V Zener with ±5 % tolerance?
Yes, but only where tighter regulation is beneficial. Its ±2 % tolerance provides superior accuracy over ±5 % parts like BZX84-C12, reducing system-level calibration effort. However, its optimized leakage profile may affect noise-sensitive analog stages differently than standard Zeners.
Is the SOD123F package compatible with standard reflow soldering profiles?
Yes-Nexperia specifies reflow soldering as the only recommended method. The SOD123F footprint (2.9 mm × 1.6 mm pad, 1.1 mm solder paste height) is fully compatible with IPC-7527-compliant lead-free reflow profiles, with peak temperature ≤ 260 °C and time above liquidus ≤ 60 seconds.
Does the "QX" suffix indicate a specific revision or testing grade?
No-the "QX" suffix denotes Nexperia's standard automotive-grade ordering code for the BZT5250H-B12 variant, confirming full AEC-Q101 qualification, extended temperature screening (−55 °C to +150 °C), and traceable lot-level test data per automotive PPAP requirements.
BZT5250H-B12-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):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 9.1 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
BZT5250H-B12-QX FAQ
1.How can I place an order for BZT5250H-B12-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B12-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-B12-QX reliable?
The price and inventory of BZT5250H-B12-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-B12-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-B12-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B12-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B12-QX?
BZT5250H-B12-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B12-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-B12-QX?
For technical support, including BZT5250H-B12-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B12-QX requirements.
6.How does Aetrix verify that BZT5250H-B12-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B12-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-B12-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-B12-QX?
All BZT5250H-B12-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B12-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-B12-QX part is unused and in its original packaging.
Return procedure for BZT5250H-B12-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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