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Nexperia USA Inc. BZT52H-A22X
- Part No.:
- BZT52H-A22X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A22X.pdf
- Description:
- DIODE ZENER 22V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,811
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Product details
Overview
BZT52H-A22X from Nexperia is a precision Zener voltage regulator diode in SOD123F package, designed for low-power voltage reference and overvoltage protection in biasing, feedback, and clamp circuits. It delivers 22 V nominal Zener voltage at 5 mA test current, ±1 % tolerance, 220 Ω maximum differential resistance, and operates up to 150 °C junction temperature - deployed in power supply feedback loops and analog sensor signal conditioning.
For engineers reviewing the BZT52H-A22X datasheet, BZT52H-A22X pinout, BZT52H-A22X application, or BZT52H-A22X equivalent, this page provides verified Zener voltage, thermal resistance, reverse current limits, differential resistance, and cathode/anode terminal mapping - all confirmed from Nexperia's Rev. 7 product data sheet (Jan 2023).
Technical Context
This device functions as a two-terminal silicon Zener diode operating in reverse breakdown mode, with tightly controlled 22 V regulation at IZ = 5 mA. Its ±1 % tolerance and low 220 Ω dynamic impedance ensure stable reference performance under varying load and temperature conditions.
Thermal design is supported by Rth(j-a) = 330 K/W (free air) and Rth(j-sp) = 70 K/W (cathode solder point), enabling reliable operation up to 830 mW total power dissipation on FR4 PCB with 1 cm² cathode pad - critical for compact, thermally constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.78 V to 22.22 V at IZ = 5 mA - ensures precise 22 V regulation with ±1 % accuracy for feedback stability. |
| Differential Resistance (rdif) | ≤ 220 Ω - minimizes output voltage variation under changing load current in reference applications. |
| Reverse Current (IR) | ≤ 0.05 μA at VR = 17.6 V - guarantees low leakage in high-impedance sensing and standby circuits. |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C with 1 cm² cathode pad - defines maximum continuous DC power handling in standard PCB layout. |
| Junction Temperature (Tj) | −65 °C to +150 °C - supports industrial and extended-temperature embedded systems without derating below −40 °C. |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables predictable forward conduction behavior during transient clamping or dual-mode operation. |
Pinout & Package
SOD123F surface-mount plastic package: 2-pin, flat lead, small outline (3.6 mm × 1.7 mm × 1.0 mm), cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; carries reverse breakdown current; marking bar identifies this terminal. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener conduction path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in ADC references or DAC buffers. |
| 830 mW power rating (Tamb ≤ 25 °C) | Supports robust overvoltage clamping in 24 V industrial I/O protection without heatsinking. |
| Low 220 Ω differential resistance | Maintains < ±10 mV output shift across 1–10 mA load changes - critical for precision analog feedback. |
| 150 °C max junction temperature | Permits deployment in engine control modules, motor drives, and enclosed power converters. |
| SOD123F footprint compatibility | Matches industry-standard reflow land pattern (2.9 mm × 1.2 mm pads), easing PCB layout and assembly. |
Applications
| Power Supply Feedback Regulation | Overvoltage Clamp Protection |
|---|---|
|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-boost DC-DC converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference providing fixed 22 V threshold to TL431 shunt regulator or optocoupler LED drive circuit. Use Value: ±1 % VZ tolerance directly improves output voltage accuracy to ±1.5 % over line/load/temperature, reducing need for post-production calibration. |
Use Scenario: Protecting microcontroller GPIO pins or analog inputs from ESD-induced transients or supply rail overshoot. IC Role / Device Role / Timing Role: Bidirectional clamp (forward-biased anode-to-rail, reverse-biased cathode-to-rail) limiting voltage excursions to safe levels. Use Value: 220 Ω rdif ensures clamping voltage stays within 0.5 V of rated VZ during 100 ns–1 μs surges, preserving signal integrity. |
| Temperature-Stable Reference Source | Current Source Biasing |
|
Use Scenario: Generating stable bias current for op-amp input stages or transistor amplifiers in instrumentation amplifiers. IC Role / Device Role / Timing Role: Zener diode operating in constant-current mode to establish repeatable base-emitter or gate-source voltage offsets. Use Value: Low 0.05 mV/K temperature coefficient at IZ = 5 mA yields < ±0.15 V drift over −40 °C to +125 °C ambient, improving long-term gain stability. |
Use Scenario: Setting collector current in discrete BJT current mirrors used in analog front-ends or sensor signal conditioning. IC Role / Device Role / Timing Role: Zener voltage applied across emitter resistor to define IC = VZ/RE, independent of β variation. Use Value: 22 V rating allows use with higher-voltage rails (e.g., ±15 V supplies), while 220 Ω rdif keeps current error < 1 % across ±10 % supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52C22 | ±5 % tolerance, 220 Ω rdif, same SOD123F package | Lower cost; acceptable where ±5 % VZ meets system accuracy requirements | Select when budget constraints outweigh precision needs and board space permits same footprint. |
| MMSZ5248B | ±5 % tolerance, 30 Ω rdif, SOD-123 package (identical mechanical outline) | Lower dynamic impedance improves regulation under fast load steps but sacrifices voltage accuracy | Choose for high-dynamic-range clamping where low rdif matters more than tight VZ spec. |
Compared with BZT52H-A22X, BZT52C22 trades ±1 % accuracy for cost reduction, while MMSZ5248B offers superior dynamic response at the expense of tighter voltage control - making the A22X optimal for precision reference roles where stability and tolerance dominate.
Availability
BZT52H-A22X is available at Aetrix Electronics and suitable for power supply feedback regulation, overvoltage clamp protection, and temperature-stable reference source applications requiring stable component supply and full traceability.
Supply support for BZT52H-A22X 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, headquartered in Nijmegen, Netherlands.
The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation and protection in cost-sensitive, space-constrained industrial and consumer electronics.
FAQ
What is the Zener test current for BZT52H-A22X?
The specified Zener voltage of 21.78 V to 22.22 V is measured at IZ = 5 mA, per Table 8 in the Nexperia datasheet Rev. 7. This current level balances measurement stability and self-heating effects, and is the standard condition for verifying ±1 % tolerance compliance.
Can BZT52H-A22X be used in automotive applications?
No - the BZT52H-A22X is explicitly designated as non-automotive qualified per Nexperia's revision history (Rev. 7, Jan 2023). Automotive-grade alternatives require −Q suffix variants and AEC-Q200 qualification, which this part does not hold.
What is the maximum reverse voltage before breakdown?
The maximum rated reverse voltage before Zener conduction begins is VR = 17.6 V at IR = 0.05 μA, as defined in Table 8. Operation above this voltage initiates controlled breakdown; exceeding absolute maximum ratings risks irreversible damage.
How does thermal resistance affect power derating?
With Rth(j-a) = 330 K/W, power must be linearly derated above 25 °C ambient: Pmax(Tamb) = 830 mW × (1 − (Tamb − 25)/125). At 100 °C ambient, maximum allowable power drops to 500 mW to maintain Tj ≤ 150 °C.
BZT52H-A22X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±1%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.4 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
BZT52H-A22X FAQ
1.How can I place an order for BZT52H-A22X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A22X 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 BZT52H-A22X reliable?
The price and inventory of BZT52H-A22X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-A22X is usually 5 days.
3.What payment methods are accepted for BZT52H-A22X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A22X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A22X?
BZT52H-A22X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A22X 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 BZT52H-A22X?
For technical support, including BZT52H-A22X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A22X requirements.
6.How does Aetrix verify that BZT52H-A22X is sourced from the original manufacturer or authorized distributors?
All BZT52H-A22X 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 BZT52H-A22X meets industry standards.
7.What is the process for return or replacement of BZT52H-A22X?
All BZT52H-A22X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A22X, 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 BZT52H-A22X part is unused and in its original packaging.
Return procedure for BZT52H-A22X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A22X Tags
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MM5Z5V1ST1G
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