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Nexperia USA Inc. BZT5250H-B4V3X
- Part No.:
- BZT5250H-B4V3X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B4V3X.pdf
- Description:
- DIODE ZENER 4.3V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:3,614
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Product details
Overview
BZT5250H-B4V3X from Nexperia is a low-current Zener diode in SOD123F package, rated for 4.3 V nominal Zener voltage at 50 µA test current, with ±2 % tolerance, 830 mW total power dissipation, and 95 Ω differential resistance at 5 mA - used for precision voltage reference and low-bias regulation in portable battery-powered systems.
For engineers reviewing the BZT5250H-B4V3X datasheet, BZT5250H-B4V3X pinout, BZT5250H-B4V3X application, or BZT5250H-B4V3X equivalent, this page delivers verified Zener voltage accuracy, thermal resistance data (150 K/W junction-to-solder-point), leakage behavior at VR = 0 V, forward voltage at 10 mA, and SOD123F footprint compatibility for surface-mount design validation.
Technical Context
This Zener diode operates with a specified test current of 50 µA, enabling stable regulation in ultra-low-power circuits where bias current must remain below 100 µA. Its intentional minor leakage rise (per AN90031) supports fast switching transients and reduced noise in signal-path references.
The device exhibits a temperature coefficient of –2.7 mV/K at 4.3 V and 5 mA, and maintains 150 pF capacitance at 0 V reverse bias and 1 MHz - critical for high-frequency stability in feedback networks and analog sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.21 V to 4.39 V at IZ = 50 µA - ensures tight regulation window for 3.3 V rail monitoring and microcontroller reset threshold control. |
| Tolerance | ±2 % - enables accurate voltage reference without post-production trimming in space-constrained IoT node designs. |
| Differential Resistance (rdiff) | 95 Ω at IZ = 5 mA - limits output impedance drift under load variation, supporting stable feedback in LDO pre-regulators. |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - defines conduction loss when used in reverse-polarity protection or clamping configurations. |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C on FR4 PCB with 1 cm² cathode pad - sets maximum continuous DC power handling in thermally constrained layouts. |
| Junction-to-Solder-Point Thermal Resistance | 150 K/W - quantifies thermal path efficiency from die to PCB copper, guiding thermal pad sizing for sustained 5 mA operation. |
| Reverse Current (IR) | 4.0 µA at VR = 4.3 V - determines quiescent current draw in always-on voltage monitor circuits. |
Pinout & Package
SOD123F package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead surface-mount plastic case with cathode marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal - polarity-critical for correct Zener breakdown orientation. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction enabling controlled breakdown at VZ. |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby current in battery-backed real-time clocks and memory retention circuits. |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves transient response and suppresses switching noise in ADC reference buffers. |
| High-precision tolerance | ±2 % VZ - eliminates need for external trimming resistors in factory-calibrated sensor signal chains. |
| Thermally enhanced mounting | 150 K/W Rth(j-sp) - enables reliable 5 mA operation without heatsinking on standard 1 oz copper PCBs. |
Applications
| Portable Sensor Node Reference | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 4.3 V reference for analog front-end amplifiers and 12-bit ADCs in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Zener voltage reference source - establishes precise input range scaling and offset correction baseline. Use Value: ±2 % VZ tolerance and 95 Ω rdiff ensure <±1 LSB error across 0–70 °C ambient range without calibration. |
Use Scenario: Generating clean, low-drift reset threshold for ARM Cortex-M0+ MCUs operating from 3.3 V rails. IC Role / Device Role / Timing Role: Precision voltage detector - triggers POR (power-on reset) when supply rises above 4.3 V ±2 %. Use Value: 4.0 µA reverse current at VR = 4.3 V minimizes loading on weak LDO outputs during startup sequencing. |
| Low-Power RTC Backup Supply | USB-C Port Voltage Clamp |
Use Scenario: Regulating coin-cell voltage (e.g., CR2032) to 4.3 V for real-time clock ICs with strict VDD tolerance. IC Role / Device Role / Timing Role: Low-current shunt regulator - sinks excess current only when cell voltage exceeds 4.39 V. Use Value: 50 µA test current and 830 mW Ptot allow continuous regulation over 10-year shelf life with <1 µA average drain. |
Use Scenario: Clamping CC line voltage during USB-C enumeration to prevent false detection from ESD-induced overshoot. IC Role / Device Role / Timing Role: Fast-transient voltage clamp - absorbs sub-100 ns spikes up to 40 W peak power (tp = 100 µs). Use Value: 40 W non-repetitive peak power rating and 150 pF capacitance preserve USB 2.0 signal integrity while meeting IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5229BS-7-F | 4.3 V ±5 %, SOD-123, 350 mW Ptot, 100 Ω rdiff at 20 mA | Higher test current (20 mA) increases quiescent power; looser tolerance affects precision reference use | Select when cost sensitivity outweighs voltage accuracy and thermal performance requirements. |
| Vishay BZX84-C4V3-TP | 4.3 V ±5 %, SOT-23, 350 mW Ptot, 90 Ω rdiff at 5 mA, 200 pF Cd | Higher capacitance degrades high-frequency noise rejection; SOT-23 footprint incompatible with SOD123F layout | Choose only if existing SOT-23 land pattern prohibits SOD123F adoption and ±5 % tolerance is acceptable. |
Compared with MMBZ5229BS-7-F and BZX84-C4V3-TP, BZT5250H-B4V3X delivers tighter ±2 % tolerance, higher 830 mW power capability, and lower 150 pF capacitance - making it uniquely suitable for precision, low-power, and high-frequency reference applications where layout reuse and thermal margin are critical.
Availability
BZT5250H-B4V3X is available at Aetrix Electronics and suitable for portable sensor nodes, microcontroller reset circuits, low-power RTC backup supplies, and USB-C port voltage clamps requiring stable component supply across extended production lifecycles.
Supply support for BZT5250H-B4V3X 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 manufacturing rooted in process technology leadership and automotive-grade quality systems.
The BZT5250H series belongs to Nexperia's low-current Zener diode product line, engineered specifically for precision voltage regulation in battery-constrained and noise-sensitive applications such as wearables, sensor hubs, and portable medical devices.
FAQ
What is the Zener voltage tolerance for BZT5250H-B4V3X?
The BZT5250H-B4V3X has a guaranteed Zener voltage range of 4.21 V to 4.39 V at 50 µA test current, corresponding to a ±2 % tolerance. This is confirmed in Table 8 of the official Nexperia datasheet Rev. 1 (18 July 2024), under the "B" selection series for 4.3 V devices.
Can BZT5250H-B4V3X be used in place of a 3.3 V Zener diode?
No - BZT5250H-B4V3X is strictly a 4.3 V Zener device and cannot substitute for a 3.3 V part without circuit redesign. Its minimum specified VZ is 4.21 V, which exceeds typical 3.3 V rail tolerances; using it would cause incorrect biasing or failure to regulate in 3.3 V systems.
What is the maximum continuous reverse current before breakdown?
At VR = 4.3 V, the reverse current is 4.0 µA (Table 8). The device enters controlled Zener breakdown only when reverse voltage reaches its specified VZ range (4.21–4.39 V); below that, leakage remains in the microampere range and does not constitute functional operation.
Is the SOD123F package compatible with standard reflow soldering profiles?
Yes - Nexperia explicitly specifies reflow soldering as the only recommended method for SOD123F packages. Figure 10 provides the exact footprint (2.9 mm × 1.6 mm solder land), and the datasheet confirms compatibility with IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) conditions.
BZT5250H-B4V3X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT5250H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 4 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT5250H-B4V3X FAQ
1.How can I place an order for BZT5250H-B4V3X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B4V3X 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-B4V3X reliable?
The price and inventory of BZT5250H-B4V3X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-B4V3X is usually 5 days.
3.What payment methods are accepted for BZT5250H-B4V3X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B4V3X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B4V3X?
BZT5250H-B4V3X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B4V3X 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-B4V3X?
For technical support, including BZT5250H-B4V3X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B4V3X requirements.
6.How does Aetrix verify that BZT5250H-B4V3X is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B4V3X 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-B4V3X meets industry standards.
7.What is the process for return or replacement of BZT5250H-B4V3X?
All BZT5250H-B4V3X units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B4V3X, 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-B4V3X part is unused and in its original packaging.
Return procedure for BZT5250H-B4V3X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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