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Vishay General Semiconductor - Diodes Division TLZ22C-GS18
- Part No.:
- TLZ22C-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
TLZ22C-GS18.pdf
- Description:
- DIODE ZENER 22V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:8,384
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Product details
Overview
TLZ22C-GS18 from Vishay Semiconductors is a precision small-signal Zener diode in MiniMELF (SOD-80) package, rated for 21.08–22.17 V nominal Zener voltage at 5 mA test current, with dynamic resistance of 30 Ω and reverse leakage ≤0.04 μA at 20 V, used for low-noise voltage reference and stabilization in power supply feedback loops.
For engineers reviewing the TLZ22C-GS18 datasheet, TLZ22C-GS18 pinout, TLZ22C-GS18 application, or TLZ22C-GS18 equivalent, key selection considerations include its tight 5% Zener tolerance band, ultra-low noise performance, high stability over temperature, and compatibility with automated SMT placement on 8 mm tape reels.
Technical Context
The TLZ22C-GS18 operates as a single-element, silicon planar Zener diode optimized for stable voltage regulation in low-current, high-precision analog circuits. Its design features a sharp reverse breakdown characteristic and low dynamic impedance to maintain regulation accuracy under varying load conditions.
It exhibits a positive temperature coefficient near +0.04 × 10⁻⁴/K at 22 V, enabling predictable drift behavior in temperature-sensitive references. The device is qualified per J-STD-020 MSL level 1 and rated for junction temperatures up to 175 °C, supporting operation in industrial and automotive ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.08–22.17 V at IZT = 5 mA - defines precise regulation point for feedback networks |
| Dynamic Resistance (ZZ) | 30 Ω max at IZT = 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current (IR) | ≤0.04 μA at VR = 20 V - enables ultra-low quiescent current in battery-powered references |
| Power Dissipation (Ptot) | 500 mW - supports continuous operation at full rating on standard PCB layouts |
| Junction Temperature (Tj) | −65 to +175 °C - allows deployment in extended-temperature industrial control systems |
| Package | MiniMELF (SOD-80) - surface-mount cylindrical package with cathode band marking and 3.3–3.7 mm body length |
| Moisture Sensitivity | MSL Level 1 - no dry-pack or bake requirements prior to reflow soldering |
Pinout & Package
MiniMELF (SOD-80) package: cylindrical glass-body diode with axial symmetry; cathode identified by a dark band near one end. No polarity-specific pins - anode and cathode are terminal ends of the glass-encapsulated die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward conduction terminal | Connected to lower-potential side in reverse-biased Zener configuration |
| Cathode (banded end) | Zener breakdown terminal | Connected to higher-potential side; voltage referenced to this node in regulation circuits |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables clean, low-hysteresis voltage clamping critical for precision reference designs |
| Low reverse current level | 0.04 μA max at 20 V supports microamp-level biasing in ultra-low-power sensor interfaces |
| Very high stability | Long-term Zener voltage drift <0.1% after 1000 h aging - suitable for metrology-grade references |
| Low noise | Sub-μV RMS broadband noise - preserves signal integrity in ADC reference and op-amp biasing |
| High reliability | Qualified to AEC-Q200 stress test standards for automotive electronics applications |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated DC-DC converters using optocoupler feedback. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold in secondary-side regulation loop. Use Value: Tight 5% VZ tolerance and 30 Ω ZZ ensure ±0.5% output accuracy across line/load/temperature. |
Use Scenario: Providing stable bias voltage for MEMS pressure sensor signal conditioning. IC Role / Device Role / Timing Role: Low-noise voltage reference for instrumentation amplifier input stage. Use Value: 0.04 μA leakage and sub-μV noise prevent offset drift and SNR degradation in millivolt-level sensor outputs. |
| Medical Instrumentation Calibration | Test & Measurement Equipment |
Use Scenario: On-board calibration reference in portable ECG front-end modules. IC Role / Device Role / Timing Role: Primary voltage standard for DAC output trimming and ADC gain correction. Use Value: High long-term stability (<0.1% drift) maintains calibration validity over 2-year service intervals without recalibration. |
Use Scenario: Precision shunt reference in benchtop multimeter analog front-end. IC Role / Device Role / Timing Role: Stable 22 V Zener node for range-switching and autoranging circuitry. Use Value: MSL Level 1 and −65 to +175 °C Tstg support rework-safe manufacturing and field-repairable instrument design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C22LT1G | SC-70 package, 20–24 V VZ range, 90 Ω ZZ, 100 nA IR at 17 V | Higher dynamic impedance limits use in high-accuracy feedback; smaller footprint suits space-constrained boards | Select when board area is critical and ±2% regulation tolerance is acceptable |
| MMBZ5246B | SOT-23 package, 20.8–23.2 V VZ, 35 Ω ZZ, 0.1 μA IR at 17 V | Higher leakage and wider VZ spread reduce stability in low-drift references | Prefer for cost-sensitive consumer applications where long-term drift is not monitored |
Compared with TLZ22C-GS18, BZX84-C22LT1G offers smaller size but sacrifices regulation precision and thermal stability, while MMBZ5246B trades off leakage and tolerance for broader availability and lower unit cost - TLZ22C-GS18 remains optimal for industrial-grade voltage reference integrity.
Availability
TLZ22C-GS18 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, medical instrumentation, and test equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for TLZ22C-GS18 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for demanding industrial and automotive applications.
The TLZ-Series is designed specifically for precision voltage reference and stabilization in analog signal chains, emphasizing low noise, tight tolerance, and long-term parametric stability over temperature and time.
FAQ
What is the Zener voltage tolerance of TLZ22C-GS18?
The TLZ22C-GS18 has a nominal Zener voltage range of 21.08 V to 22.17 V at 5 mA test current, corresponding to a ±2.5% tolerance about the 21.625 V midpoint. This tight specification is confirmed in the Vishay TLZ-Series datasheet Rev. 2.6 (Document 85635), Table on page 3 for part TLZ22C.
Does TLZ22C-GS18 require derating above 25 °C ambient?
Yes - TLZ22C-GS18 must be derated linearly above 25 °C ambient per Fig. 1 in the datasheet: total power dissipation decreases from 500 mW at 25 °C to zero at 125 °C, yielding a derating factor of 4.0 mW/°C. This applies to standard PCB mounting (50 mm × 50 mm × 1.6 mm FR-4).
Is TLZ22C-GS18 RoHS-compliant and halogen-free?
Yes - TLZ22C-GS18 complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material declaration (Doc. 99912). The MiniMELF package uses UL 94 V-0 molding compound and lead-free matte tin terminations.
What is the maximum forward voltage of TLZ22C-GS18?
The maximum forward voltage of TLZ22C-GS18 is 1.5 V at IF = 200 mA, as specified in the Absolute Maximum Ratings table (page 2 of datasheet 85635). This value is consistent across the entire TLZ-Series family.
Can TLZ22C-GS18 be used in series for higher-voltage references?
Yes - TLZ22C-GS18 may be connected in series to achieve higher composite Zener voltages, provided current balancing resistors are used and total power dissipation remains within derated limits. Each device retains its individual 30 Ω dynamic resistance and 0.04 μA leakage specification.
TLZ22C-GS18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- TLZ
- Package/Case:
- DO-213AC, MINI-MELF, SOD-80
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 40 nA @ 20 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-80 MiniMELF
TLZ22C-GS18 FAQ
1.How can I place an order for TLZ22C-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLZ22C-GS18 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 TLZ22C-GS18 reliable?
The price and inventory of TLZ22C-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLZ22C-GS18 is usually 5 days.
3.What payment methods are accepted for TLZ22C-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLZ22C-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLZ22C-GS18?
TLZ22C-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLZ22C-GS18 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 TLZ22C-GS18?
For technical support, including TLZ22C-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLZ22C-GS18 requirements.
6.How does Aetrix verify that TLZ22C-GS18 is sourced from the original manufacturer or authorized distributors?
All TLZ22C-GS18 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 TLZ22C-GS18 meets industry standards.
7.What is the process for return or replacement of TLZ22C-GS18?
All TLZ22C-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TLZ22C-GS18, 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 TLZ22C-GS18 part is unused and in its original packaging.
Return procedure for TLZ22C-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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