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Nexperia USA Inc. BZT5250H-B4V7-QX
- Part No.:
- BZT5250H-B4V7-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B4V7-QX.pdf
- Description:
- DIODE ZENER 4.7V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,371
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Product details
Overview
BZT5250H-B4V7-QX from Nexperia is a low-current Zener diode in SOD123F package, providing precise 4.7 V ±2 % regulation at 50 µA test current, with 600 Ω differential resistance and -2.7 mV/K temperature coefficient - optimized for low-bias voltage reference in automotive sensor signal conditioning and portable battery-powered microcontroller reset circuits.
For engineers reviewing the BZT5250H-B4V7-QX datasheet, BZT5250H-B4V7-QX pinout, BZT5250H-B4V7-QX application, or BZT5250H-B4V7-QX equivalent, this device delivers AEC-Q101-qualified Zener regulation with intentional leakage tuning for noise-sensitive analog front-ends and fast-switching power rail monitoring.
Technical Context
This Zener diode operates in reverse breakdown mode with nominal 4.7 V regulation at IZ = 50 µA, exhibiting a typical differential resistance of 600 Ω at IZ = 5 mA and a negative temperature coefficient of -2.7 mV/K - enabling stable low-power reference generation across -55 °C to +150 °C ambient range.
Its SOD123F package features a 1 cm² cathode thermal pad (Rth(j-sp) = 70 K/W), supports 830 mW total power dissipation at Tamb ≤ 25 °C, and maintains <1 µA reverse current at VR = 3.76 V - critical for ultra-low-quiescent current bias networks in always-on automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.61 V to 4.79 V at IZ = 50 µA - ensures tight 4.7 V regulation for precision MCU brown-out detection. |
| Tolerance | ±2 % (B-series) - enables accurate voltage threshold setting without external trimming. |
| Differential Resistance (rdiff) | 600 Ω max at IZ = 5 mA - limits output impedance drift under load variation in reference divider networks. |
| Temperature Coefficient (SZ) | -2.7 mV/K - provides predictable, linear VZ drift for compensated analog sensing paths. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - allows use as low-drop clamp in bidirectional ESD protection schemes. |
| Reverse Current (IR) | ≤ 5.0 µA at VR = 3.76 V - guarantees minimal standby leakage in battery-critical applications. |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C on FR4 PCB - supports robust operation in compact automotive PCB layouts. |
Pinout & Package
SOD123F surface-mount plastic package: 2.6 mm × 1.6 mm × 1.1 mm body, single-sided copper FR4 mounting, cathode-side thermal pad (1 cm²), marking bar denotes cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; thermal pad attached to ground plane for junction-to-solder-point cooling (Rth(j-sp) = 70 K/W). |
| 2 (A) | Anode | Connected to lower-potential rail (e.g., GND or bias source); polarity must be observed to avoid forward conduction during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood environments (-55 °C to +150 °C) with lifetime reliability testing per stress standards. |
| Low-test-current specification | Rated at 50 µA - enables stable regulation in nanoamp-level bias circuits without loading sensitive sources. |
| Optimized leakage profile | Intentional minor rise in IR reduces high-frequency noise and improves switching transient response in feedback loops. |
| Thermal performance | Rth(j-a) = 330 K/W (free air), Rth(j-sp) = 70 K/W (cathode pad) - supports thermal design in space-constrained modules. |
| Small-form-factor SMD | SOD123F footprint (2.6 × 1.6 mm) - compatible with high-density automotive PCB assembly and reflow soldering only. |
Applications
| Automotive Cabin Sensor Reference | Portable Medical Device Reset Circuit |
|---|---|
|
Use Scenario: Providing stable 4.7 V reference for analog-to-digital conversion in HVAC temperature sensors mounted near engine compartments. IC Role / Device Role / Timing Role: Zener voltage reference element in ratiometric sensor excitation network, directly tied to ADC VREF input. Use Value: ±2 % tolerance and -2.7 mV/K TC ensure <±1.5 % full-scale error over -40 °C to +125 °C operating range without calibration. |
Use Scenario: Generating reliable reset threshold for ultra-low-power wearable ECG monitor MCU during battery voltage sag. IC Role / Device Role / Timing Role: Standby-mode Zener clamp in RC-based power-on reset (POR) circuit, sinking <5 µA at 3.76 V. Use Value: 50 µA test current rating and sub-µA leakage below VZ extend coin-cell battery life beyond 3 years in always-on monitoring mode. |
| Industrial PLC Analog Input Protection | Smart Meter Voltage Monitoring |
|
Use Scenario: Clamping transient overvoltage on 4–20 mA current loop receiver inputs exposed to field wiring surges. IC Role / Device Role / Timing Role: Low-energy Zener shunt protector placed before op-amp input stage, absorbing <40 W non-repetitive pulses. Use Value: 830 mW steady-state dissipation and 40 W peak surge capability (tp = 100 µs) prevent latch-up while maintaining signal integrity. |
Use Scenario: Monitoring Li-ion battery pack voltage in AMI smart meters using resistive divider with integrated reference. IC Role / Device Role / Timing Role: Precision Zener element in high-impedance divider feedback path, referenced to system ground. Use Value: 600 Ω rdiff minimizes divider ratio error under varying load, ensuring ±0.2 % metering accuracy over 10-year field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V7 | ±5 % tolerance, SOT23 package, 350 mW Ptot, rdiff = 80 Ω at 5 mA | Higher power density but looser tolerance; lacks AEC-Q101 qualification | Select for cost-sensitive consumer designs where ±5 % regulation suffices and thermal constraints permit smaller footprint. |
| MMSZ4704T1G | ±5 % tolerance, SOD123 package, 500 mW Ptot, rdiff = 100 Ω at 5 mA, no intentional leakage tuning | Lower thermal resistance (Rth(j-a) = 270 K/W) but unqualified for automotive use | Prefer for industrial control boards requiring tighter rdiff than BZT5250H series but without automotive certification needs. |
Compared with BZX84-C4V7 and MMSZ4704T1G, the BZT5250H-B4V7-QX offers superior automotive qualification, tighter ±2 % tolerance, and purpose-built leakage behavior for noise reduction - making it the sole choice for AEC-compliant, low-noise, precision reference applications despite higher rdiff.
Availability
BZT5250H-B4V7-QX is available at Aetrix Electronics and suitable for automotive sensor reference, portable medical reset, industrial analog input protection, and smart meter voltage monitoring requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for BZT5250H-B4V7-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, noise-sensitive voltage regulation in automotive and industrial systems where precision, stability, and long-term reliability are mandatory.
FAQ
What is the maximum reverse voltage before breakdown for BZT5250H-B4V7-QX?
The nominal Zener voltage is 4.7 V with a tolerance of ±2 %, meaning breakdown occurs between 4.61 V and 4.79 V at IZ = 50 µA. The absolute maximum non-repetitive reverse voltage is not specified; operation above VZ + 10 % risks exceeding power limits. Designers must limit applied reverse voltage to stay within the 830 mW dissipation envelope at the intended ambient temperature.
Can BZT5250H-B4V7-QX be used in forward-biased configuration?
Yes - it functions as a standard silicon diode with VF ≤ 0.9 V at IF = 10 mA, suitable for low-voltage clamping or polarity protection. However, its primary design intent and characterization are for reverse-biased Zener regulation; forward characteristics are secondary and not optimized for switching speed or recovery time.
How does the "intentional minor rise of leakage current" benefit circuit performance?
This controlled increase in reverse leakage (vs. standard Zeners) reduces high-frequency noise and improves transient response during voltage step changes - particularly valuable in feedback paths of LDOs or sensor signal chains where low-phase-noise regulation is critical. It is implemented via process tuning and documented in Application Note AN90031.
Is the SOD123F package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies reflow soldering as the only recommended method. The SOD123F footprint requires a 2.9 mm × 1.6 mm solder land with 1.1 mm × 1.1 mm paste deposits per pad, aligned to IPC-7095 guidelines. Wave soldering and hand soldering are not qualified and may damage the device or compromise thermal performance.
BZT5250H-B4V7-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):
- 4.7 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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-B4V7-QX FAQ
1.How can I place an order for BZT5250H-B4V7-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B4V7-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-B4V7-QX reliable?
The price and inventory of BZT5250H-B4V7-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-B4V7-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-B4V7-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B4V7-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B4V7-QX?
BZT5250H-B4V7-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B4V7-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-B4V7-QX?
For technical support, including BZT5250H-B4V7-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B4V7-QX requirements.
6.How does Aetrix verify that BZT5250H-B4V7-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B4V7-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-B4V7-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-B4V7-QX?
All BZT5250H-B4V7-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B4V7-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-B4V7-QX part is unused and in its original packaging.
Return procedure for BZT5250H-B4V7-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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