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Nexperia USA Inc. BZT52H-A22-QX
- Part No.:
- BZT52H-A22-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A22-QX.pdf
- Description:
- DIODE ZENER 22V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:139
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Product details
Overview
BZT52H-A22-QX from Nexperia is a ±1 % tolerance Zener diode in SOD123F package, rated for 22 V nominal breakdown voltage at 5 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation and reference applications.
For engineers reviewing the BZT52H-A22-QX datasheet, BZT52H-A22-QX pinout, BZT52H-A22-QX application, or BZT52H-A22-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, reverse current limits at 20 V, differential resistance under regulation, and automotive-grade reliability context - all critical for precision biasing, overvoltage clamping, and stable reference design.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a tightly controlled 21.78–22.22 V working voltage range at IZ = 5 mA, exhibiting a temperature coefficient of +0.05 mV/K and typical differential resistance of 220 Ω. Its low 150 K/W junction-to-solder-point thermal resistance enables reliable operation on standard FR4 PCBs with tin-plated copper.
Designed for stable DC voltage reference and transient suppression, it supports continuous reverse current up to 250 mA and non-repetitive peak reverse current of 1.25 A (100 μs pulse), with reverse leakage limited to ≤25 μA at VR = 20 V and junction temperature up to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 21.78–22.22 V at IZ = 5 mA - ensures precise 22 V regulation within ±1 % tolerance for reference stability |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - defines maximum steady-state thermal load on standard FR4 PCB with 1 cm² cathode pad |
| Differential Resistance (rdif) | 220 Ω max at IZ = 5 mA - determines output impedance and regulation sensitivity to current variation |
| Reverse Current (IR) | ≤25 μA at VR = 20 V - guarantees low leakage during standby or pre-breakdown conditions |
| Junction-to-Solder-Point Rth | 150 K/W - enables accurate thermal modeling for board-level reliability in automotive ambient profiles |
| Non-Repetitive Peak IZSM | 1.25 A (100 μs, Tj = 25 °C) - supports surge immunity in ESD-coupled or load-dump scenarios |
| AEC-Q101 Qualified | Yes - validated for automotive under-hood and infotainment applications per discrete semiconductor stress test standard |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, small outline; dimensions 3.4–3.6 mm length × 2.5–2.7 mm width × 1.0–1.2 mm height; 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; carries reverse current during Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage reference or clamping function |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % VZ tolerance | Enables high-accuracy voltage references without post-production trimming in automotive sensor signal conditioning |
| AEC-Q101 qualification | Validates robustness across -65 °C to +150 °C ambient, vibration, and humidity for engine control and ADAS modules |
| 830 mW power rating | Supports sustained regulation in 12 V/24 V systems with margin for transient overloads without derating |
| SOD123F footprint | Compatible with standard reflow soldering and automated placement; occupies < 10 mm² PCB area for space-constrained ECUs |
| Low 220 Ω rdif | Maintains < 22 mV output shift per 100 μA load change - critical for ADC reference and op-amp bias stability |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 22 V reference for microcontroller ADC and analog front-end circuitry in gasoline/diesel ECU modules. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing fixed bias point for precision analog measurement paths. Use Value: ±1 % VZ tolerance and AEC-Q101 qualification ensure long-term accuracy and functional safety compliance under thermal cycling. |
Use Scenario: Regulating excitation voltage for 4–20 mA current-loop pressure transmitters operating in factory automation environments. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining constant supply to bridge sensors and instrumentation amplifiers. Use Value: 220 Ω differential resistance minimizes output drift with varying loop current, improving measurement repeatability. |
| Automotive Infotainment Power Rail Clamp | Medical Diagnostic Equipment Bias Supply |
Use Scenario: Clamping 24 V supply rail against load-dump transients in head unit power management subsystems. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing short-duration surges above 22 V while protecting downstream LDOs and PMICs. Use Value: 1.25 A non-repetitive peak reverse current rating handles ISO 7637-2 Pulse 5a events without degradation. |
Use Scenario: Generating clean, low-noise 22 V bias for photodiode amplifier stages in portable ultrasound imaging devices. IC Role / Device Role / Timing Role: Low-leakage (≤25 μA @ 20 V) shunt reference ensuring minimal input offset error in high-gain analog chains. Use Value: Stable temperature coefficient (+0.05 mV/K) prevents gain drift across clinical operating temperature ranges (10–40 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B22-Q | ±2 % VZ tolerance (21.6–22.4 V), same SOD123F package and 830 mW rating | Acceptable where tighter regulation not required; lower cost for non-safety-critical consumer power rails | Select when ±2 % accuracy suffices and AEC-Q101 is not mandated; identical thermal and surge performance |
| MMSZ5248B-TP | ±5 % tolerance (20.9–23.1 V), SOD-123 package, 500 mW Ptot, no AEC-Q101 qualification | Limited to commercial-grade applications; unsuitable for automotive due to lower power and unqualified reliability | Choose only for cost-sensitive, non-automotive designs with relaxed accuracy and thermal requirements |
Compared with BZT52H-A22-QX, the BZT52H-B22-Q offers identical form-factor and surge capability at reduced accuracy, while MMSZ5248B-TP trades AEC-Q101 compliance and 66 % higher power rating for broader tolerance and lower cost - making the A22-QX optimal for automotive precision regulation where both accuracy and qualification are mandatory.
Availability
BZT52H-A22-QX is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and medical diagnostic equipment requiring stable component supply with guaranteed AEC-Q101 compliance and traceable lot history.
Supply support for BZT52H-A22-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 product line, engineered specifically for stable voltage reference and clamping in harsh automotive and industrial environments where precision, thermal resilience, and long-term reliability are essential.
FAQ
What is the maximum reverse voltage before breakdown for BZT52H-A22-QX?
The specified working voltage range is 21.78–22.22 V at IZ = 5 mA. Below this, reverse current remains ≤25 μA at 20 V. Breakdown onset occurs gradually near 21.8 V; full regulation is established above 22 V with defined differential resistance and power limits.
Can BZT52H-A22-QX be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and parameter spread; paralleling causes current imbalance and thermal runaway. For higher power, use a single higher-rated device or active regulation. Derating is required above 25 °C ambient per the 150 K/W Rth(j-sp).
Is the SOD123F package compatible with standard reflow profiles?
Yes - Nexperia specifies reflow soldering as the only recommended method. The SOD123F footprint matches IPC-7351B standards, with land pattern dimensions (2.8 × 1.6 mm pads, 2.9 mm center-to-center) validated for JEDEC J-STD-020-compliant thermal profiles including peak temperatures up to 260 °C.
How does temperature affect the 22 V regulation accuracy?
At IZ = 5 mA, the temperature coefficient is +0.05 mV/K - meaning VZ increases by ~1.1 mV per 22 °C rise. Over -40 °C to +125 °C junction range, total drift is approximately ±1.3 V, fully characterized in the datasheet's SZ vs. IZ curves (Fig. 7).
BZT52H-A22-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%
- 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-A22-QX FAQ
1.How can I place an order for BZT52H-A22-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A22-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-A22-QX reliable?
The price and inventory of BZT52H-A22-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-A22-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-A22-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A22-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A22-QX?
BZT52H-A22-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A22-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-A22-QX?
For technical support, including BZT52H-A22-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A22-QX requirements.
6.How does Aetrix verify that BZT52H-A22-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-A22-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-A22-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-A22-QX?
All BZT52H-A22-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A22-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-A22-QX part is unused and in its original packaging.
Return procedure for BZT52H-A22-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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