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Nexperia USA Inc. BZT52H-B22-QX
- Part No.:
- BZT52H-B22-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B22-QX.pdf
- Description:
- DIODE ZENER 22V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,487
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Product details
Overview
BZT52H-B22-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 22 V nominal breakdown voltage at IZ = 5 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation. It operates as a precision shunt reference in low-power biasing and overvoltage clamping circuits.
For engineers reviewing the BZT52H-B22-QX datasheet, BZT52H-B22-QX pinout, BZT52H-B22-QX application, or BZT52H-B22-QX equivalent, this page delivers verified Zener voltage, thermal resistance, differential resistance, reverse current, and automotive qualification status - all confirmed from Nexperia's official product data sheet Rev. 1 (October 2021).
Technical Context
This device functions as a two-terminal shunt voltage regulator with a nominal Zener voltage of 21.6 V to 22.4 V at 5 mA test current, exhibiting a temperature coefficient of +15.4 mV/K and differential resistance ≤ 220 Ω. Its junction-to-ambient thermal resistance is 330 K/W on standard FR4 PCB.
Designed for surface-mount use in space-constrained automotive ECUs and industrial sensors, it supports non-repetitive peak reverse current up to 1.25 A (100 μs pulse) and maintains stable regulation across −65 °C to +150 °C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.6 V to 22.4 V at IZ = 5 mA - defines precise clamping threshold for 22 V rail protection |
| Tolerance | ±2 % - ensures tight voltage control without post-production trimming |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - enables continuous regulation in compact PCB layouts with minimal heatsinking |
| Differential Resistance (rdif) | ≤ 220 Ω - limits output impedance drift under load variation for stable reference performance |
| Reverse Current (IR) | ≤ 0.05 μA at VR = 17.6 V - guarantees low leakage in high-impedance bias networks |
| Thermal Resistance (Rth(j-a)) | 330 K/W - determines maximum allowable ambient temperature rise before junction exceeds 150 °C |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - confirms low-loss conduction during forward-biased transient events |
Pinout & Package
SOD123F surface-mount plastic package: 2.7–3.6 mm length, 1.2–1.7 mm width, 0.55–0.70 mm height; cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker determines correct orientation for reverse-bias operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards |
| ±2 % voltage tolerance | Reduces need for binning or external trimming in 22 V reference designs |
| 830 mW power rating | Supports sustained regulation in 22 V/37 mA applications without derating below 25 °C ambient |
| SOD123F footprint | Enables automated placement and reflow soldering on dense PCBs with 2.8 mm × 1.6 mm land pattern |
| 150 °C max junction temperature | Allows operation in under-hood environments where ambient reaches +125 °C with adequate thermal margin |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 22 V supply rail for LIN transceiver biasing in door module electronics. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage despite battery fluctuations between 9 V and 16 V. Use Value: Prevents LIN communication dropout by holding transceiver VCC within ±2 % of 22 V across temperature and load variations. |
Use Scenario: Providing precision 22 V reference for 4–20 mA loop transmitter DAC output stage. IC Role / Device Role / Timing Role: Zener-based voltage reference establishing analog output compliance limit. Use Value: Ensures current loop accuracy remains within 0.1 % full-scale error due to <220 Ω dynamic impedance and +15.4 mV/K tempco compensation. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Bias Supply |
Use Scenario: Clamping secondary-side feedback voltage in isolated flyback converter for 22 V output regulation. IC Role / Device Role / Timing Role: Overvoltage protector for optocoupler input circuitry during transient surges. Use Value: Limits feedback node excursion to ≤22.4 V, preventing false regulation and ensuring ±1 % output stability under line/load transients. |
Use Scenario: Generating stable 22 V bias for photodiode amplifier front-end in portable ultrasound probe. IC Role / Device Role / Timing Role: Low-noise shunt reference supplying clean analog supply to op-amp rails. Use Value: Delivers <0.05 μA leakage at 17.6 V reverse bias, minimizing input offset drift and preserving signal integrity in µV-level measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C22-Q | ±5 % tolerance (20.8 V–23.3 V), higher IR (≤0.05 μA vs. same), identical package and Ptot | Acceptable where cost sensitivity outweighs voltage precision; not suitable for closed-loop feedback requiring tight setpoint | Select when budget constraints dominate and system gain compensates for wider VZ spread |
| MMSZ5247B-TP | ±5 % tolerance, 20 V nominal, SOD-123 package, 500 mW Ptot, no AEC-Q101 qualification | Limited to commercial-grade applications; lacks automotive reliability validation and thermal robustness | Choose only for non-automotive prototypes or cost-driven consumer designs with relaxed lifetime requirements |
Compared with BZT52H-B22-QX, the C22-Q variant trades voltage accuracy for lower unit cost while retaining automotive qualification, whereas MMSZ5247B-TP sacrifices both precision and qualification for legacy compatibility - making the BZT52H-B22-QX optimal for production automotive systems demanding ±2 % regulation and AEC-Q101 assurance.
Availability
BZT52H-B22-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, medical diagnostic bias supplies, and consumer power adapter feedback circuits requiring stable component supply with guaranteed long-term continuity.
Supply support for BZT52H-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 discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation in harsh automotive and industrial environments where precision, thermal resilience, and long-term stability are critical.
FAQ
What is the maximum reverse voltage before breakdown for BZT52H-B22-QX?
The specified maximum reverse voltage before onset of Zener conduction is 17.6 V - defined as the voltage at which reverse current reaches 1 μA. This value ensures predictable turn-on behavior and distinguishes the device from standard rectifiers, enabling reliable use as a shunt regulator above this threshold.
Does BZT52H-B22-QX require a series current-limiting resistor in typical applications?
Yes - a series resistor is mandatory to limit Zener current to safe operating levels. For example, at 24 V input and 22 V regulation, a 100 Ω resistor restricts IZ to 20 mA, staying within the 830 mW power limit and avoiding thermal runaway under worst-case ambient conditions.
How does the +15.4 mV/K temperature coefficient affect regulation accuracy over temperature?
The positive temperature coefficient means VZ increases by 15.4 mV per Kelvin rise in junction temperature. Over a 100 °C range (25 °C to 125 °C), this contributes ~1.54 V drift - requiring system-level compensation or selection of adjacent voltage grades if absolute stability beyond ±3 % is required.
Can BZT52H-B22-QX be used in parallel for higher power handling?
No - Zener diodes exhibit negative resistance characteristics and mismatched VZ tolerances prevent balanced current sharing. Parallel connection risks thermal runaway in the lower-VZ unit. For higher power, select a single higher-rated device like BZX84-C22 or use active regulation instead.
BZT52H-B22-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±1.82%
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-B22-QX FAQ
1.How can I place an order for BZT52H-B22-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-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 BZT52H-B22-QX reliable?
The price and inventory of BZT52H-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 BZT52H-B22-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B22-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B22-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B22-QX?
BZT52H-B22-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-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 BZT52H-B22-QX?
For technical support, including BZT52H-B22-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B22-QX requirements.
6.How does Aetrix verify that BZT52H-B22-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-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 BZT52H-B22-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B22-QX?
All BZT52H-B22-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-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 BZT52H-B22-QX part is unused and in its original packaging.
Return procedure for BZT52H-B22-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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