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Diodes Incorporated LZ52C22W
- Part No.:
- LZ52C22W
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- 1206 (3216 Metric)
- Datasheet:
-
LZ52C22W.pdf
- Description:
- DIODE ZENER 22V 500MW 1206
- Quantity:
- Payment:
- Shipping:
Inventory:5,104
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Product details
Overview
LZ52C22W from Diodes Incorporated is a surface-mount Zener diode with a nominal reverse breakdown voltage of 22 V, ±2% tolerance, 500 mW power dissipation, and ultra-small 1206 package. It delivers stable voltage regulation in low-power biasing, reference, and overvoltage protection circuits for industrial sensors, power supply feedback loops, and I/O level clamping.
For engineers reviewing the LZ52C22W datasheet, LZ52C22W pinout, LZ52C22W application, or LZ52C22W equivalent, key selection criteria include its 21.56–22.44 V Zener range at 5 mA test current, 55 Ω dynamic impedance at IZT, 0.1 µA maximum reverse leakage at 16 V, and compatibility with automated SMT assembly on standard 1206 footprints.
Technical Context
This Zener diode uses silicon epitaxial planar construction to achieve tight voltage tolerance and low leakage. Its 2% VZ tolerance and specified Zener impedance (55 Ω at 5 mA, 220 Ω at 1 mA) support precision voltage referencing in analog signal chains and feedback networks.
Thermal resistance of 300 °C/W and operating temperature range from –65 °C to +175 °C enable reliable operation in automotive under-hood and industrial control environments where ambient thermal stress is significant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.56–22.44 V at IZT = 5 mA - defines precise regulation window for feedback or reference use |
| Power Dissipation (PTOT) | 500 mW at TA = 25 °C - sets maximum continuous DC or pulsed power handling |
| Zener Impedance (ZZT) | 55 Ω at IZT = 5 mA - determines AC regulation stability under varying load conditions |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 16 V - ensures minimal parasitic current in high-impedance bias networks |
| Package | 1206 (3.2 × 1.6 mm) - enables high-density PCB layout and compatibility with standard SMT reflow profiles |
| Operating Temp Range | –65 °C to +175 °C - supports deployment in extended-temperature industrial and automotive applications |
Pinout & Package
Package: 1206 surface-mount ceramic-body package with cathode indicated by color band; terminals are lead-free plated; weight ≈10 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with color band; connected to regulated voltage node in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables accurate voltage setting without post-production trimming in reference designs |
| Ultra-low reverse leakage (≤0.1 µA) | Minimizes error current in high-impedance sensor biasing and precision divider networks |
| Lead-free, halogen- and antimony-free "Green" construction | Meets RoHS 3 (2015/863/EU) and automotive ELV compliance requirements |
| 300 °C/W junction-to-ambient thermal resistance | Allows direct thermal modeling for derating in confined board areas without heatsinking |
Applications
| Industrial Sensor Biasing | SMPS Feedback Reference |
|---|---|
Use Scenario: Providing stable bias current to analog pressure or temperature transducers in factory automation systems. IC Role / Device Role / Timing Role: Shunt Zener reference establishing fixed voltage node for excitation and signal conditioning circuitry. Use Value: Tight 2% VZ tolerance and sub-µA leakage ensure measurement accuracy drift <0.5% over temperature. | Use Scenario: Setting regulated output voltage in secondary-side feedback loop of isolated flyback converters. IC Role / Device Role / Timing Role: Precision voltage clamp defining optocoupler LED drive threshold for output regulation. Use Value: Low ZZT (55 Ω) maintains loop stability across line/load transients without added compensation. |
| I/O Level Clamping | Overvoltage Protection |
Use Scenario: Protecting microcontroller GPIO pins from ESD or transient overvoltage during field wiring. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting input voltage to safe logic levels. Use Value: 22 V standoff with 16 V working voltage ensures robustness against 12 V rail surges while preserving signal integrity. | Use Scenario: Safeguarding analog front-end inputs in battery-powered data loggers exposed to load-dump events. IC Role / Device Role / Timing Role: Primary overvoltage suppression element diverting surge energy before downstream ICs. Use Value: 500 mW rating allows absorption of short-duration transients up to 100 ms per JEDEC JESD22-A114. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C22 | Same 22 V nominal, but ±5% tolerance and SOT-23 package (higher RθJA = 375 °C/W) | Lower cost, but reduced voltage accuracy and thermal performance limits use in precision references | Select when cost sensitivity outweighs regulation accuracy and thermal margin requirements |
| MMSZ5247B | 22 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package (RθJA = 320 °C/W) | Smaller footprint than 1206, but higher ZZT (70 Ω) and no RoHS 3 halogen-free certification | Choose for space-constrained boards where full "Green" compliance is not mandated |
Compared with BZX84-C22 and MMSZ5247B, LZ52C22W provides tighter voltage tolerance, lower leakage, and verified halogen/antimony-free compliance-making it preferred for high-accuracy, thermally demanding, or environmentally regulated designs.
Availability
LZ52C22W is available at Aetrix Electronics and suitable for industrial sensor biasing, SMPS feedback referencing, and I/O level clamping requiring stable component supply, consistent Zener voltage matching, and RoHS 3-compliant sourcing.
Supply support for LZ52C22W 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The LZ52C series belongs to Diodes' precision Zener diode product line, engineered specifically for surface-mount voltage regulation, reference, and protection in space-constrained, thermally aggressive, and environmentally regulated applications.
FAQ
What is the Zener voltage tolerance and test condition for LZ52C22W?
LZ52C22W has a ±2% Zener voltage tolerance, specified as 21.56 V to 22.44 V at a test current (IZT) of 5 mA and ambient temperature of 25 °C. This tight tolerance is achieved via laser trimming during manufacturing and is validated per DS45096 Rev. 7.
Does LZ52C22W support automotive-grade temperature operation?
Yes - LZ52C22W is rated for operation from –65 °C to +175 °C, meeting extended-temperature requirements for under-hood and powertrain control modules. Its 1206 package and silicon epitaxial planar construction provide proven reliability under thermal cycling and vibration stress typical in automotive applications.
How does the 1206 package affect thermal performance compared to smaller Zeners?
The 1206 package delivers a thermal resistance of 300 °C/W (junction-to-ambient), significantly lower than SOD-123 (320 °C/W) or SOT-23 (375 °C/W). This enables higher sustained power dissipation at elevated ambient temperatures without derating, critical for compact power supplies and sensor modules with limited airflow.
Is LZ52C22W compliant with RoHS 3 and halogen-free standards?
Yes - LZ52C22W is fully compliant with EU Directive 2015/863/EU (RoHS 3), contains <900 ppm bromine, <900 ppm chlorine (<1500 ppm total Br+Cl), and <1000 ppm antimony, and carries Diodes Incorporated's certified "Green" designation per their quality documentation.
LZ52C22W Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 1206 (3216 Metric)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 16 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 1206
LZ52C22W FAQ
1.How can I place an order for LZ52C22W through Aetrix?
Please submit a Request for Quotation (RFQ) for LZ52C22W 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 LZ52C22W reliable?
The price and inventory of LZ52C22W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LZ52C22W is usually 5 days.
3.What payment methods are accepted for LZ52C22W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LZ52C22W transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LZ52C22W?
LZ52C22W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LZ52C22W 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 LZ52C22W?
For technical support, including LZ52C22W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LZ52C22W requirements.
6.How does Aetrix verify that LZ52C22W is sourced from the original manufacturer or authorized distributors?
All LZ52C22W 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 LZ52C22W meets industry standards.
7.What is the process for return or replacement of LZ52C22W?
All LZ52C22W units undergo pre-shipment inspection (PSI). If there is an issue with LZ52C22W, 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 LZ52C22W part is unused and in its original packaging.
Return procedure for LZ52C22W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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