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Nexperia USA Inc. BZT5250H-B16X
- Part No.:
- BZT5250H-B16X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B16X.pdf
- Description:
- DIODE ZENER 16V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:5,012
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Product details
Overview
BZT5250H-B16X from Nexperia is a low-current Zener diode in SOD123F package, rated for 16 V nominal Zener voltage at 50 µA test current, with ±2 % tolerance, 830 mW total power dissipation, and 12.1 V minimum/16.8 V maximum reverse breakdown range. It serves as a precision voltage reference or low-bias regulator in portable battery-powered circuits.
For engineers reviewing the BZT5250H-B16X datasheet, BZT5250H-B16X pinout, BZT5250H-B16X application, or BZT5250H-B16X equivalent, key selection criteria include its 50 µA low-test-current specification, intentional leakage optimization for noise reduction per AN90031, SOD123F thermal resistance (150 K/W junction-to-solder-point), and cathode-marked polarity alignment for PCB layout verification.
Technical Context
This Zener operates in reverse-bias breakdown mode with specified VZ = 15.2 V to 16.8 V at IZ = 5 mA, differential resistance rdiff ≤ 200 Ω at that condition, and temperature coefficient SZ = +10.4 mV/K. Its low 50 µA test current enables stable regulation under micro-power bias conditions.
The device features intentionally elevated leakage current versus standard Zeners-per AN90031-to improve switching speed and reduce high-frequency noise in sensing and reference paths. Thermal design must account for Rth(j-sp) = 150 K/W to solder point on FR4 with 1 cm² cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.2 V min / 16.8 V max at IZ = 5 mA - defines regulated output range under typical operating current |
| Tolerance | ±2 % - ensures tight voltage accuracy for precision reference applications |
| Test Current (IZT) | 50 µA - enables stable regulation in ultra-low-power circuits such as coin-cell monitors |
| Total Power Dissipation | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance | ≤ 200 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Forward Voltage | 0.9 V max at IF = 10 mA - defines conduction drop when used in forward-biased protection paths |
| Junction Temperature | 150 °C max - constrains thermal derating above ambient and limits high-temp operation |
Pinout & Package
The BZT5250H-B16X uses the SOD123F surface-mount plastic package (2.6 mm × 1.6 mm × 1.1 mm), featuring flat leads and a cathode-marking bar on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-bias path enabling Zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - supports regulation in energy-constrained systems like IoT sensors and wearables |
| Optimized leakage profile | Intentionally elevated IR per AN90031 - reduces switching transients and broadband noise in feedback loops |
| Thermal performance | Rth(j-sp) = 150 K/W - enables predictable junction temperature rise with solder-point cooling on standard PCBs |
| Small footprint | SOD123F package (2.6 × 1.6 mm) - saves board space in dense portable designs while maintaining hand-solderability |
| Voltage stability | +10.4 mV/K temperature coefficient - provides predictable drift behavior for compensated reference circuits |
Applications
| Battery Voltage Monitoring | Low-Power Sensor Reference |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in wearable health trackers using a microcontroller ADC with internal reference. IC Role / Device Role / Timing Role: Zener diode provides stable 16 V reference for resistive divider scaling, enabling accurate 0–4.2 V cell measurement. Use Value: 50 µA test current minimizes quiescent drain on the battery; ±2 % tolerance ensures <10 mV absolute error in full-scale reading. | Use Scenario: Supplying a clean bias voltage to an analog front-end amplifier in an environmental sensor node. IC Role / Device Role / Timing Role: Functions as shunt regulator for op-amp supply rail, rejecting ripple from switching LDO outputs. Use Value: Optimized leakage reduces high-frequency noise coupling into sensitive analog signal paths, improving SNR by >3 dB. |
| Overvoltage Clamp Protection | Microcontroller Reset Circuit |
Use Scenario: Protecting GPIO pins of an ARM Cortex-M0+ MCU against transient overvoltage from ESD or inductive kickback. IC Role / Device Role / Timing Role: Placed between I/O line and ground to clamp spikes above 16.8 V while limiting peak current via series resistor. Use Value: 830 mW power rating allows absorption of 40 W non-repetitive surges (tp = 100 µs), meeting IEC 61000-4-2 Level 4. | Use Scenario: Generating a precise reset threshold for a low-power microcontroller in a smart meter design. IC Role / Device Role / Timing Role: Forms part of a resistor-divider network feeding a supervisor IC's threshold input. Use Value: Tight ±2 % VZ tolerance ensures reset assertion within ±0.3 V across temperature, preventing spurious reboots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C16 | Same 16 V nominal, ±5 % tolerance, SOT23 package, 300 mW Ptot | Lower power rating and looser tolerance limit use in precision references or high-energy clamping | Select when cost or SOT23 compatibility outweighs need for 50 µA test current or 830 mW capability |
| MMSZ5245B | 16 V nominal, ±5 %, SOD-123 package, 500 mW Ptot, 200 µA IZT | Higher test current increases quiescent load; lower power rating restricts surge handling | Choose only for legacy designs where MMSZ5245B footprint and qualification are mandatory |
Compared with BZT5250H-B16X, BZX84-C16 offers smaller size but sacrifices 43 % power margin and 2.5× tighter voltage tolerance, while MMSZ5245B trades off low-bias operation and thermal robustness for broader distributor availability.
Availability
BZT5250H-B16X is available at Aetrix Electronics and suitable for battery monitoring, sensor reference, overvoltage protection, and microcontroller reset circuits requiring stable component supply across industrial and consumer production runs.
Supply support for BZT5250H-B16X 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, headquartered in Nijmegen, Netherlands.
The BZT5250H series belongs to Nexperia's low-current Zener portfolio, engineered specifically for micro-power regulation and noise-sensitive reference applications in portable and battery-operated electronics.
FAQ
What is the exact Zener voltage range for BZT5250H-B16X at 5 mA test current?
The BZT5250H-B16X has a guaranteed Zener voltage range of 15.2 V (minimum) to 16.8 V (maximum) when tested at IZ = 5 mA and Tj = 25 °C, per Table 8 of the official Nexperia datasheet Rev. 1 (July 2024). This 16 V nominal rating reflects the center of the ±2 % tolerance band.
Can BZT5250H-B16X be used in place of a standard 16 V Zener with higher test current?
Yes, but with design adjustments: its 50 µA test current requires higher series resistance to avoid excessive bias current, and its optimized leakage profile may alter transient response in fast-switching clamps. It is not a direct drop-in replacement for Zeners specified at 5 mA or 20 mA test currents without recalculating operating point stability.
Does the "B" suffix in BZT5250H-B16X indicate ±2 % tolerance?
Yes-the "B" prefix in the marking code (WF for BZT5250H-B16X, per Table 4) denotes the ±2 % tolerance grade, distinct from the "C" grade (±5 %). This is confirmed in Section 2 ("Features and benefits") and Table 8 of the datasheet, which lists separate min/max VZ values for B and C variants.
What is the maximum allowable forward current for BZT5250H-B16X?
The absolute maximum forward current is 200 mA, as specified in Table 5 ("Limiting values"). However, forward conduction is not its intended operating mode; sustained forward current above 10 mA risks exceeding the 375 mW pulse-rated power limit (tp ≤ 300 µs) and may cause thermal stress outside safe operating area.
BZT5250H-B16X 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):
- 16 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.1 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-B16X FAQ
1.How can I place an order for BZT5250H-B16X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B16X 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-B16X reliable?
The price and inventory of BZT5250H-B16X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-B16X is usually 5 days.
3.What payment methods are accepted for BZT5250H-B16X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B16X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B16X?
BZT5250H-B16X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B16X 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-B16X?
For technical support, including BZT5250H-B16X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B16X requirements.
6.How does Aetrix verify that BZT5250H-B16X is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B16X 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-B16X meets industry standards.
7.What is the process for return or replacement of BZT5250H-B16X?
All BZT5250H-B16X units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B16X, 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-B16X part is unused and in its original packaging.
Return procedure for BZT5250H-B16X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT5250H-B16X Tags
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MMSZ5231B-7-F
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MM5Z5V1ST1G
onsemi
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SMAZ12-13-F
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