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Nexperia USA Inc. BZT5250H-B22-QX
- Part No.:
- BZT5250H-B22-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B22-QX.pdf
- Description:
- DIODE ZENER 22V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,112
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Product details
Overview
BZT5250H-B22-QX from Nexperia is a low-current Zener diode in SOD123F package, providing precise 22 V voltage regulation at 50 µA test current with ±2 % tolerance, 250 Ω differential resistance at 5 mA, and AEC-Q101 qualification for automotive load-dump protection and ECU reference circuits.
For engineers reviewing the BZT5250H-B22-QX datasheet, BZT5250H-B22-QX pinout, BZT5250H-B22-QX application, or BZT5250H-B22-QX equivalent, this page delivers verified Zener voltage, thermal resistance (150 K/W junction-to-solder point), leakage behavior, automotive qualification status, and SOD123F footprint compatibility for PCB layout and reliability validation.
Technical Context
This Zener operates as a two-terminal shunt voltage regulator with cathode-anode polarity, specified at 50 µA test current to minimize bias power in battery-sensitive systems. Its 22 V nominal Zener voltage exhibits +0.05 µA reverse current at VR = 17.6 V and +16.4 mV/K temperature coefficient over 25 °C–125 °C.
The device uses silicon planar technology with intentional minor leakage optimization per AN90031 for fast transient response and reduced noise in feedback paths. Thermal design relies on Rth(j-sp) = 150 K/W to solder point under standard FR4 mounting with 1 cm² cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 21.6 V to 22.4 V at IZ = 50 µA - tight ±2 % tolerance enables stable reference in automotive sensor signal conditioning |
| Differential Resistance rdiff | 250 Ω max at IZ = 5 mA - ensures minimal output voltage shift under small load variations in precision bias networks |
| Reverse Current IR | 0.05 µA max at VR = 17.6 V - ultra-low leakage preserves battery life in always-on vehicle modules |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - supports low-loss anode-side clamping in dual-direction protection schemes |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C on FR4 with 1 cm² cathode pad - defines maximum continuous regulation power before thermal derating |
| Junction Temperature Tj | 150 °C max - sets upper operating limit for under-hood ECU applications with ambient up to +125 °C |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOD123F surface-mount plastic package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead profile, 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; requires 1 cm² copper pad for thermal performance |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms shunt path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - enables use in microamp-level bias networks without compromising accuracy |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient response in feedback loops |
| AEC-Q101 qualification | Qualified for automotive applications - meets stress test requirements for HTGB, HTRB, and mechanical shock |
| Thermal performance | Rth(j-sp) = 150 K/W - allows direct thermal coupling to PCB copper for passive cooling in space-constrained ECUs |
| Small-form-factor SMD | SOD123F footprint - compatible with high-density layouts and automated reflow assembly per JEDEC J-STD-020 |
Applications
| Automotive ECU Reference | Portable Sensor Biasing |
|---|---|
Use Scenario: Providing stable 22 V reference for analog front-end of engine control unit under wide temperature and supply variation. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining reference node integrity during load dump transients and cold-crank brownouts. Use Value: ±2 % tolerance and 16.4 mV/K TC ensure <±1.5 % total drift across −40 °C to +125 °C, meeting ASIL-B functional safety margin. |
Use Scenario: Biasing MEMS pressure sensor in battery-powered tire pressure monitoring system (TPMS). IC Role / Device Role / Timing Role: Low-current Zener clamp establishing fixed bias voltage for sensor excitation circuit. Use Value: 0.05 µA leakage at 17.6 V extends 10-year battery life by reducing standby current below 100 nA. |
| Industrial PLC Input Protection | Medical Instrument Voltage Clamp |
Use Scenario: Protecting 24 V digital input channel of programmable logic controller against field-wiring surges. IC Role / Device Role / Timing Role: Fast-response shunt clamp absorbing transient energy while limiting voltage to 24.2 V peak. Use Value: 250 Ω rdiff and 830 mW Ptot enable sustained clamping of 200 ms overvoltage events without thermal runaway. |
Use Scenario: Stabilizing reference voltage for ADC in portable ECG monitor operating from single Li-ion cell. IC Role / Device Role / Timing Role: Precision Zener regulating internal bandgap reference supply under varying battery discharge profiles. Use Value: 50 µA test current matches ultra-low-power LDO quiescent current, eliminating need for additional bias resistors. |
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 22 V ±2 %, but SOD-123 package (not SOD123F); Rth(j-a) = 330 K/W vs 150 K/W junction-to-solder point | Lacks AEC-Q101 qualification; not recommended for automotive under-hood use | Select only for non-automotive industrial designs where thermal pad area is unrestricted |
| Vishay BZX84-C22 | 22 V ±5 % tolerance; 600 Ω rdiff at 5 mA; no intentional leakage optimization | Higher voltage drift and slower transient response; suitable only for non-critical regulation | Use only when cost sensitivity outweighs precision and noise performance requirements |
Compared with MMBZ5250BS and BZX84-C22, BZT5250H-B22-QX delivers tighter tolerance, lower dynamic impedance, AEC-Q101 compliance, and optimized thermal path-making it the sole choice for automotive-grade 22 V reference and protection where reliability and parametric stability are mandatory.
Availability
BZT5250H-B22-QX is available at Aetrix Electronics and suitable for automotive ECU design, portable medical instrumentation, industrial PLC input protection, and battery-powered sensor biasing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZT5250H-B22-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 essential semiconductors for automotive, industrial, and consumer markets.
The BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for low-current, low-noise voltage regulation in automotive electronics and portable battery systems.
FAQ
What is the exact Zener voltage range for BZT5250H-B22-QX at 50 µA test current?
The BZT5250H-B22-QX has a guaranteed Zener voltage range of 21.6 V to 22.4 V when measured at IZ = 50 µA and Tj = 25 °C. This ±2 % tolerance is confirmed in Table 8 of the official Nexperia datasheet Rev. 2 (18 July 2024) and applies to all units in the B-series variant.
Does BZT5250H-B22-QX require a heatsink for operation at 830 mW?
No external heatsink is required. At 830 mW dissipation, thermal management relies on the PCB: the datasheet specifies this rating assumes a 1 cm² cathode copper pad on FR4 with tin plating. Rth(j-sp) = 150 K/W enables safe junction temperatures up to 125 °C ambient without added thermal hardware.
How does the "intentional minor rise of leakage current" improve performance?
Per Application Note AN90031, the controlled leakage increase reduces minority-carrier lifetime, shortening recovery time and suppressing high-frequency noise in regulation loops. This yields faster transient response and lower RMS noise in feedback references-critical for precision ADC biasing and closed-loop sensor interfaces.
Is BZT5250H-B22-QX compatible with lead-free reflow soldering profiles?
Yes. The SOD123F package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C. Figure 10 in the datasheet provides the exact solder land pattern (2.9 mm × 1.6 mm), and reflow is the only recommended soldering method-wave or hand soldering is not supported.
BZT5250H-B22-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):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.7 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-B22-QX FAQ
1.How can I place an order for BZT5250H-B22-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B22-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-B22-QX reliable?
The price and inventory of BZT5250H-B22-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-B22-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-B22-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B22-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B22-QX?
BZT5250H-B22-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B22-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-B22-QX?
For technical support, including BZT5250H-B22-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B22-QX requirements.
6.How does Aetrix verify that BZT5250H-B22-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B22-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-B22-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-B22-QX?
All BZT5250H-B22-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B22-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-B22-QX part is unused and in its original packaging.
Return procedure for BZT5250H-B22-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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