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Nexperia USA Inc. BZT5250H-B20X
- Part No.:
- BZT5250H-B20X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B20X.pdf
- Description:
- DIODE ZENER 20V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:6,376
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Product details
Overview
BZT5250H-B20X from Nexperia is a low-current Zener diode in SOD123F package, designed for precision voltage regulation at 20 V nominal Zener voltage (±2 % tolerance), 50 µA test current, and 830 mW total power dissipation. It serves as a stable reference or clamp in portable battery-powered circuits, low-power sensor interfaces, and microcontroller reset supervision.
For engineers reviewing the BZT5250H-B20X datasheet, BZT5250H-B20X pinout, BZT5250H-B20X application, or BZT5250H-B20X equivalent, this page delivers verified electrical parameters, thermal behavior, SOD123F mounting details, and real-world use cases - all grounded in Nexperia's Rev. 1 (18 July 2024) product data sheet.
Technical Context
This Zener diode operates with a specified reverse breakdown voltage of 19.0 V to 21.0 V at IZ = 50 µA, exhibiting a temperature coefficient of +5.4 mV/K and differential resistance of ≤225 Ω at IZ = 5 mA. Its low leakage current (<0.05 µA at VR = 16 V) supports high-impedance bias networks.
Designed for surface-mount reliability, it features a junction-to-ambient thermal resistance of 330 K/W (free air) and 150 K/W (junction-to-solder point), enabling operation up to 150 °C junction temperature. The SOD123F footprint complies with IPC-7351B standard land patterns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.0 V to 21.0 V at IZ = 50 µA - defines precise clamping threshold for low-bias regulation |
| Tolerance | ±2 % - enables tight voltage reference without external trimming in space-constrained designs |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports sustained operation under moderate thermal load on FR4 PCB |
| Differential Resistance (rdiff) | ≤225 Ω at IZ = 5 mA - ensures stable regulation against load variations in feedback paths |
| Reverse Leakage (IR) | <0.05 µA at VR = 16 V - minimizes quiescent current drain in battery-critical applications |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - confirms low conduction loss when used in series-pass or polarity-protection roles |
| Thermal Resistance (Rth(j-a)) | 330 K/W - quantifies self-heating impact in unforced-air environments |
Pinout & Package
The BZT5250H-B20X is housed in a plastic SOD123F surface-mount package measuring 2.6 mm × 1.6 mm × 1.1 mm, with cathode marked by a bar on the body. Mounting requires reflow soldering only, per IPC-compliant footprint (2.9 mm × 1.6 mm occupied area).
| 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-biased junction for Zener action |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current specification | Rated at IZ = 50 µA - enables accurate regulation in nanoampere-bias circuits like RTC backup supplies |
| Optimized leakage profile | Intentional minor rise in leakage per AN90031 - improves switching speed and reduces noise in signal-clamping roles |
| High-precision tolerance | ±2 % VZ - eliminates need for post-assembly calibration in voltage-reference designs |
| Thermally robust construction | Junction temperature rating of 150 °C - supports deployment in industrial ambient conditions without derating |
| Standardized SMD footprint | SOD123F package - ensures compatibility with automated pick-and-place and AOI inspection systems |
Applications
| Microcontroller Reset Circuit | Portable Sensor Bias Network |
|---|---|
Use Scenario: Providing a clean, stable 20 V reference to enable reliable reset assertion during brown-out events in ARM Cortex-M0+ systems. IC Role / Device Role / Timing Role: Zener diode functions as a shunt voltage reference in a resistor-divider network feeding an external reset supervisor IC. Use Value: ±2 % VZ tolerance ensures reset threshold remains within 19.0–21.0 V across temperature, preventing spurious resets or delayed recovery. |
Use Scenario: Supplying a low-drift bias voltage to MEMS pressure sensor excitation circuitry in handheld medical devices. IC Role / Device Role / Timing Role: Acts as a passive voltage clamp and reference source for analog front-end gain-setting resistors. Use Value: 50 µA test current and <0.05 µA leakage minimize standby current draw, extending single-CR2032 battery life beyond 18 months. |
| USB-C Power Negotiation Clamp | Industrial Signal Conditioning |
Use Scenario: Protecting CC line voltage levels during USB PD communication between host and peripheral in embedded docking stations. IC Role / Device Role / Timing Role: Shunt regulator clamps transient overvoltage spikes while maintaining DC common-mode level near 20 V. Use Value: 225 Ω differential resistance and fast response due to optimized leakage ensure clamping settles within 100 ns of surge onset. |
Use Scenario: Stabilizing reference voltage for 4–20 mA loop transmitter DACs operating in factory-floor control cabinets. IC Role / Device Role / Timing Role: Provides temperature-compensated 20 V reference for current-loop scaling resistors and op-amp bias networks. Use Value: +5.4 mV/K temperature coefficient matches typical resistor TC, minimizing net drift across –40 °C to +85 °C ambient range. |
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 MMBZ5250BS | Same 20 V nominal, ±5 % tolerance, SOD-123 package, but rated at 200 mW Ptot | Limited to ultra-low-power biasing; unsuitable for >1 mA regulation loads | Select when cost sensitivity outweighs precision and power headroom requirements |
| Vishay BZX84-C20 | 20 V nominal, ±5 %, SOT-23 package, 350 mW Ptot, higher rdiff (≥500 Ω) | Requires larger series resistor for same regulation stability; less suitable for low-Z feedback paths | Choose only if SOT-23 footprint is mandatory and thermal margin is ample |
Compared with MMBZ5250BS and BZX84-C20, the BZT5250H-B20X delivers tighter tolerance, higher power capability, and lower dynamic impedance - making it the preferred choice for precision, medium-current regulation where board space permits SOD123F.
Availability
BZT5250H-B20X is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial sensor modules, and USB-C accessory power management requiring stable component supply, long-lifecycle assurance, and traceable sourcing.
Supply support for BZT5250H-B20X 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZT5250H series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for low-current, high-stability voltage regulation in battery-powered and thermally constrained applications.
FAQ
What is the maximum continuous reverse current the BZT5250H-B20X can sustain without degradation?
The device is rated for a maximum forward current of 200 mA, but its Zener operation relies on controlled reverse bias. At 20 V, sustained reverse current must remain below 41.5 mA to stay within the 830 mW power limit (P = V × I). Derating is required above 25 °C ambient per the 150 K/W junction-to-solder-point thermal resistance.
Does the BZT5250H-B20X meet RoHS and REACH compliance standards?
Yes - Nexperia confirms the BZT5250H-B20X is RoHS-compliant (lead-free terminations, homogeneous material restrictions met) and REACH-conformant (SVHC substances below threshold). Full declarations are available via Nexperia's Product Change Notification portal using document ID BZT5250H_SER.
Can this Zener diode be used in avalanche mode for ESD protection?
No - the BZT5250H-B20X is not characterized or qualified for ESD protection. Its 40 W non-repetitive peak reverse power rating applies only to short-duration surges (tp = 100 µs), not ESD waveforms (e.g., IEC 61000-4-2). Dedicated TVS diodes such as Nexperia PESD5V0S1BA should be used for ESD clamping.
How does the "B" suffix in BZT5250H-B20X affect its electrical behavior versus "C" variants?
The "B" suffix denotes ±2 % Zener voltage tolerance (19.0–21.0 V), while "C" indicates ±5 % (18.0–22.0 V). Both share identical thermal specs, package, and leakage optimization per AN90031, but "B" parts undergo tighter binning for applications demanding higher reference accuracy.
BZT5250H-B20X 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):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.2 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-B20X FAQ
1.How can I place an order for BZT5250H-B20X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B20X 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-B20X reliable?
The price and inventory of BZT5250H-B20X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-B20X is usually 5 days.
3.What payment methods are accepted for BZT5250H-B20X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B20X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B20X?
BZT5250H-B20X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B20X 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-B20X?
For technical support, including BZT5250H-B20X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B20X requirements.
6.How does Aetrix verify that BZT5250H-B20X is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B20X 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-B20X meets industry standards.
7.What is the process for return or replacement of BZT5250H-B20X?
All BZT5250H-B20X units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B20X, 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-B20X part is unused and in its original packaging.
Return procedure for BZT5250H-B20X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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