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Vishay General Semiconductor - Diodes Division TLZ30A-GS18
- Part No.:
- TLZ30A-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
TLZ30A-GS18.pdf
- Description:
- DIODE ZENER 30V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:3,684
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Product details
Overview
TLZ30A-GS18 from Vishay Semiconductors is a precision small-signal Zener diode in MiniMELF (SOD-80) package, designed for voltage stabilization and reference applications. It delivers a nominal Zener voltage of 30 V with ±3.5% tolerance (26.99–28.39 V at 5 mA), 55 Ω dynamic resistance at test current, and ultra-low reverse leakage current of ≤0.04 μA at 25.6 V. It operates reliably in industrial power supply feedback loops and analog sensor biasing circuits.
For engineers reviewing the TLZ30A-GS18 datasheet, TLZ30A-GS18 pinout, TLZ30A-GS18 application, or TLZ30A-GS18 equivalent, key selection criteria include its tight VZ tolerance, low noise performance, high stability over temperature, MiniMELF thermal robustness, and compatibility with automated SMT assembly on 8 mm tape reels.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown mode. Its sharp reverse characteristic and low dynamic impedance (55 Ω at IZT = 5 mA) enable stable regulation under varying load conditions. The 500 mW total power dissipation rating and 500 K/W junction-to-ambient thermal resistance support operation up to 175 °C junction temperature.
Designed for high-reliability analog signal conditioning, it features a temperature coefficient of approximately +0.06 %/°C near 30 V (inferred from Fig. 3), low capacitance (~10 pF at 25.6 V), and UL 94 V-0 molding compound. Its MiniMELF construction provides superior thermal cycling endurance versus standard DO-35 packages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.99–28.39 V at 5 mA - defines precise regulation point for feedback networks |
| Dynamic Resistance (ZZ) | 55 Ω at 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current (IR) | ≤0.04 μA at 25.6 V - preserves accuracy in high-impedance reference nodes |
| Power Dissipation (Ptot) | 500 mW - supports continuous operation in compact PCB layouts without forced cooling |
| Junction Temperature (Tj) | 175 °C max - enables use in automotive under-hood and industrial motor control environments |
| Package | MiniMELF (SOD-80) - provides 31 mg mass, MSL Level 1, and 260 °C peak reflow compatibility |
| Forward Voltage (VF) | 1.5 V max at 200 mA - allows bidirectional ESD protection integration in clamp circuits |
Pinout & Package
MiniMELF (SOD-80) glass-body cylindrical package with axial cathode band marking. Cathode identified by black ring; anode is unmarked end. Dimensions: Ø1.4–1.6 mm × L3.3–3.7 mm. Footprint requires 2.0 mm pad spacing with 0.47 mm max cathode indent clearance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; reference ground node in Zener configuration | Connected to system ground or lower-potential rail when used as shunt regulator |
| Cathode | Negative terminal in forward bias; regulated output node in Zener configuration | Provides stable 30 V reference voltage relative to anode; marked with black band |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables clean, predictable knee transition at 30 V - critical for precision clamping and threshold detection |
| Low reverse leakage current | ≤0.04 μA at 25.6 V - minimizes error current in high-Z op-amp reference inputs and ADC bias networks |
| High stability & low noise | Specified for long-term drift <0.1%/1000 h and low 1/f noise - suitable for metrology-grade references |
| UL 94 V-0 flammability rating | Ensures flame-retardant behavior in safety-critical power supplies and industrial controllers |
| MSL Level 1 moisture sensitivity | Allows indefinite floor life before reflow - eliminates baking requirements for production SMT lines |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Biasing |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 30 V threshold to TL431-like comparator circuitry. Use Value: Tight 3.5% VZ tolerance and 55 Ω ZZ ensure ±1% output regulation across line/load/temperature. |
Use Scenario: Providing stable bias voltage to piezoresistive pressure sensors in engine control units. IC Role / Device Role / Timing Role: Low-noise, low-drift reference source for ratiometric excitation of bridge sensors. Use Value: ≤0.04 μA leakage and high thermal stability maintain sensor offset accuracy over -40 to +125 °C. |
| Medical Instrumentation Reference | Test & Measurement Calibration |
Use Scenario: Generating fixed reference for analog front-end gain calibration in portable ECG monitors. IC Role / Device Role / Timing Role: Precision DC reference node in programmable gain amplifier (PGA) offset compensation path. Use Value: Low 1/f noise and high long-term stability reduce calibration drift between scheduled maintenance cycles. |
Use Scenario: Serving as secondary voltage standard in handheld multimeter internal reference chain. IC Role / Device Role / Timing Role: Stable 30 V Zener element in cascaded reference ladder for extended range accuracy. Use Value: UL 94 V-0 packaging and MSL Level 1 compliance support field-serviceable, drop-in replacement design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C30 (ON Semiconductor) | DO-35 package, ±5% VZ tolerance (28.5–31.5 V), 80 Ω ZZ, 100 mW Ptot | Lower power rating and looser tolerance limit use in non-critical biasing only | Select when cost sensitivity outweighs precision and thermal performance requirements |
| MMSZ5256B (Diodes Inc.) | SOD-123 package, ±5% VZ, 30 V nominal, 150 mW Ptot, 30 Ω ZZ at 20 mA | Higher ZZ at lower test current; smaller footprint but reduced thermal mass | Prefer for space-constrained designs where 500 mW derating is not required |
Compared with TLZ30A-GS18, BZX55C30 offers lower cost but sacrifices 1.5% tolerance and thermal capability, while MMSZ5256B trades MiniMELF reliability and 500 mW headroom for board area savings - TLZ30A-GS18 remains optimal for high-stability, high-power analog references.
Availability
TLZ30A-GS18 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, and medical instrumentation requiring stable component supply, long-lifecycle availability, and traceable sourcing.
Supply support for TLZ30A-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 engineered for precision voltage reference and stabilization in analog signal chains, emphasizing low noise, tight tolerance, and thermal stability across extended temperature ranges.
FAQ
What is the exact Zener voltage range for TLZ30A-GS18?
The TLZ30A-GS18 has a specified Zener voltage range of 26.99 V to 28.39 V at a test current of 5 mA, corresponding to a ±3.5% tolerance around the nominal 30 V rating. This range is verified per Vishay Document 85635 Rev. 2.6 and applies strictly to the TLZ30A-GS18 variant, not the broader TLZ-Series.
Does TLZ30A-GS18 support lead-free reflow soldering?
Yes, TLZ30A-GS18 is qualified for lead-free reflow with a peak temperature of up to 260 °C, compliant with J-STD-020 MSL Level 1 requirements. Its MiniMELF (SOD-80) package uses UL 94 V-0 molding compound and exhibits no moisture sensitivity concerns during standard SMT processes.
How does the dynamic resistance of TLZ30A-GS18 impact regulation accuracy?
TLZ30A-GS18 exhibits 55 Ω dynamic resistance at 5 mA, meaning a 1 mA change in Zener current causes ~55 mV output shift. This low ZZ value directly improves load regulation in shunt reference designs - for example, maintaining <±0.2% output deviation across ±10 mA load variations in feedback circuits.
Can TLZ30A-GS18 be used in series or parallel configurations?
TLZ30A-GS18 is rated for single-device operation only. Series connection is discouraged due to mismatched temperature coefficients and potential current hogging; parallel use is prohibited per Vishay's absolute maximum ratings, as uneven current sharing may exceed individual 500 mW limits and cause thermal runaway.
What is the maximum allowable reverse voltage before breakdown for TLZ30A-GS18?
TLZ30A-GS18 begins controlled Zener breakdown at its specified VZ range (26.99–28.39 V). The absolute maximum reverse voltage is not defined separately - operation above VZ must remain within the 500 mW power limit and respect the 0.04 μA leakage ceiling at 25.6 V to avoid parametric shift or degradation.
TLZ30A-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):
- 30 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 40 nA @ 25.6 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
TLZ30A-GS18 FAQ
1.How can I place an order for TLZ30A-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLZ30A-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 TLZ30A-GS18 reliable?
The price and inventory of TLZ30A-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLZ30A-GS18 is usually 5 days.
3.What payment methods are accepted for TLZ30A-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLZ30A-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLZ30A-GS18?
TLZ30A-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLZ30A-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 TLZ30A-GS18?
For technical support, including TLZ30A-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLZ30A-GS18 requirements.
6.How does Aetrix verify that TLZ30A-GS18 is sourced from the original manufacturer or authorized distributors?
All TLZ30A-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 TLZ30A-GS18 meets industry standards.
7.What is the process for return or replacement of TLZ30A-GS18?
All TLZ30A-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TLZ30A-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 TLZ30A-GS18 part is unused and in its original packaging.
Return procedure for TLZ30A-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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