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Nexperia USA Inc. BZT5250H-C51-QX
- Part No.:
- BZT5250H-C51-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-C51-QX.pdf
- Description:
- DIODE ZENER 51V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,116
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Product details
Overview
BZT5250H-C51-QX from Nexperia is a low-current Zener diode in SOD123F package, rated for 51 V nominal Zener voltage at 50 µA test current, with ±5 % tolerance, 830 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation in battery-powered sensor nodes and ECU bias circuits.
For engineers reviewing the BZT5250H-C51-QX datasheet, BZT5250H-C51-QX pinout, BZT5250H-C51-QX application, or BZT5250H-C51-QX equivalent, this page delivers verified Zener voltage, leakage behavior, thermal resistance, differential resistance, and automotive-grade reliability data - critical for low-bias rail stabilization and noise-sensitive analog front-ends.
Technical Context
This Zener operates in reverse breakdown mode with a specified VZ = 50.0–52.0 V at IZ = 50 µA, exhibiting a temperature coefficient of +0.05 mV/K and differential resistance of 400 Ω at IZ = 2 mA. Its intentional minor leakage rise improves switching speed and reduces noise per AN90031.
Designed for surface-mount use on FR4 PCBs, it delivers Rth(j-a) = 330 K/W (free air) and Rth(j-sp) = 70 K/W (cathode solder point), supporting stable operation up to Tj = 150 °C and ambient range of −55 to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 50.0–52.0 V at IZ = 50 µA - defines precise clamping level for 51 V nominal rail regulation |
| Tolerance | ±5 % - matches C-series grading for cost-optimized automotive designs where tight voltage control is secondary to noise performance |
| Differential Resistance (rdiff) | 400 Ω at IZ = 2 mA - determines output impedance and load regulation sensitivity in shunt regulator topologies |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 with 1 cm² cathode pad |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - enables predictable forward conduction during transient overvoltage or reverse-polarity protection |
| Junction Temperature (Tj) | 150 °C maximum - supports under-hood automotive environments without derating below full-rated power |
| AEC-Q101 Qualified | Yes - validated for discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling per automotive reliability standards |
Pinout & Package
SOD123F plastic surface-mount package: 2.6 mm × 1.6 mm × 1.1 mm body, flat leads, 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; carries reverse breakdown current |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes Zener conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current specification | VZ defined at 50 µA - enables accurate regulation in ultra-low-power systems like tire pressure sensors and wake-up circuits |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces high-frequency noise and accelerates turn-off in dynamic bias networks |
| Automotive qualification | AEC-Q101 compliant - ensures reliability across temperature, humidity, and vibration profiles required for engine control and ADAS modules |
| Thermal performance | Rth(j-sp) = 70 K/W - allows efficient heat transfer from junction to solder point, enabling higher sustained power in compact layouts |
Applications
| Engine Control Unit (ECU) Bias Supply | Automotive Cabin Sensor Node |
|---|---|
Use Scenario: Stable 51 V reference for microcontroller ADC reference or op-amp biasing in engine management systems. IC Role / Device Role / Timing Role: Shunt voltage regulator providing precision clamping against supply ripple and load transients. Use Value: Maintains <±1 % output variation across −40 to +125 °C ambient due to low tempco (+0.05 mV/K) and AEC-Q101 thermal stability. |
Use Scenario: Low-current voltage clamp for MEMS accelerometer signal conditioning in HVAC or seat occupancy modules. IC Role / Device Role / Timing Role: Zener-based rail stabilization for analog front-end ICs operating from 12 V battery-derived supplies. Use Value: Enables 50 µA test current operation - extends battery life beyond 10 years in always-on cabin monitoring applications. |
| ADAS Camera Module Power Rail | Electric Power Steering (EPS) Feedback Circuit |
Use Scenario: Noise-suppressed voltage reference for image sensor bias in surround-view camera ECUs. IC Role / Device Role / Timing Role: Low-noise Zener regulator suppressing high-frequency switching noise from DC-DC converters. Use Value: Intentional leakage optimization per AN90031 reduces broadband noise by >15 dB compared to standard Zeners at 1–10 MHz. |
Use Scenario: Precision voltage clamp for torque sensor bridge excitation in EPS motor control units. IC Role / Device Role / Timing Role: Shunt regulator stabilizing 5 V or 3.3 V LDO input rails against battery surge events. Use Value: Withstands non-repetitive 40 W peak reverse power (tp = 100 µs), protecting downstream analog circuitry from load dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT5250H-B51-Q | ±2 % tolerance, lower rdiff (350 Ω at 2 mA), tighter VZ spread (49.0–51.0 V) | Better accuracy for feedback loops requiring <1 % regulation error; higher cost | Select when closed-loop stability or ADC reference precision outweighs cost sensitivity |
| MMSZ5251ET1G | 51 V nominal, ±5 %, SOD-123 package, Ptot = 500 mW, not AEC-Q101 qualified | Limited to industrial or consumer use; unsuitable for automotive under-hood deployment | Acceptable only for non-automotive prototypes or cost-constrained non-safety systems |
Compared with BZT5250H-C51-QX, the BZT5250H-B51-Q offers tighter voltage control at higher cost and same thermal rating, while MMSZ5251ET1G sacrifices automotive qualification and power capability for lower unit price - making the C51-QX optimal for production automotive systems balancing noise, reliability, and cost.
Availability
BZT5250H-C51-QX is available at Aetrix Electronics and suitable for automotive ECU design, ADAS camera power management, and battery-powered sensor node development requiring stable component supply with full traceability and long-lifecycle support.
Supply support for BZT5250H-C51-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 logic, discrete, and MOSFET solutions, with deep expertise in automotive-qualified components.
The BZT5250H-Q series belongs to Nexperia's automotive Zener portfolio, engineered specifically for low-current, low-noise voltage regulation in harsh-environment automotive electronics - emphasizing AEC-Q101 compliance, thermal robustness, and optimized leakage behavior.
FAQ
What is the Zener voltage tolerance for BZT5250H-C51-QX?
The BZT5250H-C51-QX has a ±5 % Zener voltage tolerance, meaning its nominal 51 V rating spans 48.0–54.0 V at IZ = 50 µA. This C-series grading prioritizes noise performance and cost efficiency over tight voltage control, aligning with automotive subsystems where moderate regulation accuracy suffices.
Is BZT5250H-C51-QX suitable for battery-powered applications?
Yes - it is explicitly designed for low-bias and portable battery-powered applications, with VZ specified at only 50 µA test current and optimized leakage behavior that minimizes standby current while improving switching noise suppression, extending operational lifetime in always-on sensor nodes.
How does the SOD123F package affect thermal performance?
The SOD123F package delivers Rth(j-sp) = 70 K/W to the cathode solder point, enabling efficient heat extraction in space-constrained automotive PCBs. Its 1.1 mm height and flat leads support automated reflow assembly while maintaining 830 mW power handling on standard FR4 with a 1 cm² cathode pad.
What distinguishes the 'C' series from the 'B' series in the BZT5250H-Q family?
The 'C' series (e.g., BZT5250H-C51-QX) features ±5 % tolerance and an intentionally elevated leakage current profile optimized for fast switching and reduced noise per AN90031, whereas the 'B' series offers ±2 % tolerance and lower leakage - trading noise performance for tighter voltage accuracy in feedback-critical applications.
BZT5250H-C51-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):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 180 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 35.7 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-C51-QX FAQ
1.How can I place an order for BZT5250H-C51-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-C51-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-C51-QX reliable?
The price and inventory of BZT5250H-C51-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-C51-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-C51-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-C51-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-C51-QX?
BZT5250H-C51-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-C51-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-C51-QX?
For technical support, including BZT5250H-C51-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-C51-QX requirements.
6.How does Aetrix verify that BZT5250H-C51-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-C51-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-C51-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-C51-QX?
All BZT5250H-C51-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-C51-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-C51-QX part is unused and in its original packaging.
Return procedure for BZT5250H-C51-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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