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Vishay General Semiconductor - Diodes Division TZX8V2C-TAP
- Part No.:
- TZX8V2C-TAP
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
TZX8V2C-TAP.pdf
- Description:
- DIODE ZENER 8.2V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:29,975
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Product details
Overview
TZX8V2C-TAP from Vishay Semiconductors is a silicon planar Zener diode optimized for precision voltage regulation and stabilization in low-power analog circuits, with a nominal Zener voltage of 8.2 V (min 8.1 V, max 8.5 V) at 5 mA test current, 20 Ω dynamic resistance, and ≤0.1 μA reverse leakage at 6.2 V, widely used in reference supplies and overvoltage protection for microcontroller I/O rails.
For engineers reviewing the TZX8V2C-TAP datasheet, TZX8V2C-TAP pinout, TZX8V2C-TAP application, or TZX8V2C-TAP equivalent, this device delivers stable 8.2 V regulation under 1 mA to 5 mA operating currents, supports DO-35 through-hole mounting, meets MSL Level 1 handling requirements, and offers low noise and high long-term stability for industrial sensor signal conditioning and power rail monitoring.
Technical Context
This Zener diode operates in reverse breakdown mode with sharp knee characteristics and low dynamic impedance (20 Ω at 5 mA), enabling tight voltage tolerance in feedback loops. Its thermal resistance junction-to-ambient is 300 K/W at 4 mm lead length, supporting reliable operation up to 175 °C junction temperature.
The device exhibits a positive temperature coefficient near 8.2 V (≈+5 × 10⁻⁴/K per Fig. 4), low capacitance (<25 pF at 2 V reverse bias), and forward voltage ≤1.5 V at 200 mA - confirming suitability for bidirectional clamping and dual-role reference/clamp applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.1–8.5 V at IZT = 5 mA - defines precise regulation window for 8.2 V nominal reference design |
| Dynamic Resistance (ZZ) | 20 Ω at IZT = 5 mA - ensures minimal output voltage shift under load transients |
| Reverse Leakage Current (IR) | ≤0.1 μA at VR = 6.2 V - guarantees negligible error current in high-impedance reference nodes |
| Power Dissipation (Ptot) | 500 mW at TL = 25 °C - sets maximum continuous DC power limit for PCB layout thermal design |
| Junction Temperature Range | −65 to +175 °C - enables deployment in extended-temperature industrial and automotive under-hood environments |
| Package | DO-35 (DO-204AH) - standard axial-leaded through-hole package with cathode band marking and 125 mg mass |
Pinout & Package
DO-35 (DO-204AH) glass-passivated axial package with 26 mm minimum body length, 3.9 mm maximum diameter, and cathode identified by a single band. Leads are tinned copper-clad steel, suitable for wave and hand soldering per J-STD-020 MSL Level 1 (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in shunt regulator | Connected to ground or lower-potential node; carries full load current during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply via series resistor; provides stable 8.2 V reference to downstream circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables clean, predictable turn-on at 8.2 V with minimal knee spread - critical for accurate threshold detection |
| Low reverse current level | ≤0.1 μA at 6.2 V allows use in nanoamp-biased references without degrading accuracy |
| Very high stability | Long-term Zener voltage drift <0.1 %/1000 h under rated conditions - supports calibration-critical instrumentation |
| Low noise | Typical noise <10 μVrms in 10 Hz–10 kHz band - preserves SNR in precision ADC reference paths |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller I/O Rail Protection |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 8.2 V bias to Wheatstone bridge, rejecting supply ripple. Use Value: Maintains bridge output linearity within ±0.05 % across −40 to +85 °C ambient due to low tempco and high stability. |
Use Scenario: Clamping 3.3 V or 5 V MCU GPIO pins against ESD and transient overvoltage. IC Role / Device Role / Timing Role: Bidirectional clamp (forward + reverse) limiting pin voltage to safe range during surge events. Use Value: Sub-μA leakage prevents false triggering; fast response protects against 8 kV HBM ESD per IEC 61000-4-2. |
| Programmable Logic Controller Power Monitoring | Legacy Analog Instrumentation Reference |
Use Scenario: Detecting undervoltage/fault conditions on 12 V auxiliary rails in industrial controllers. IC Role / Device Role / Timing Role: Precision Zener element in comparator-based supervisor circuit with hysteresis. Use Value: Tight 8.1–8.5 V tolerance ensures repeatable trip point; low dynamic resistance minimizes hysteresis error. |
Use Scenario: Generating stable 8.2 V reference for 4–20 mA transmitter loop-powered circuits. IC Role / Device Role / Timing Role: Primary voltage reference in two-wire current loop DAC output stage. Use Value: Low noise and high stability maintain 12-bit effective resolution over 10-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C8V2 (Nexperia) | Same 8.2 V nominal, but higher ZZ = 35 Ω and IR = 0.5 μA at 6.2 V | Less suitable for low-noise references; acceptable for basic overvoltage clamping | Select when cost sensitivity outweighs noise/stability requirements |
| 1N4736A (ON Semiconductor) | Higher Ptot = 1 W, larger DO-41 package, ZZ = 7 Ω, but wider VZ tolerance (7.7–8.7 V) | Better for higher-power dissipation; less precise for tight-tolerance references | Select when >500 mW power handling or lower dynamic impedance is required |
Compared with BZX55C8V2 and 1N4736A, the TZX8V2C-TAP offers superior voltage stability and lower leakage for precision reference use, while maintaining compact DO-35 form factor - making it optimal for space-constrained, low-power industrial analog designs where long-term accuracy is critical.
Availability
TZX8V2C-TAP is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) power supervision, and legacy analog instrumentation requiring stable component supply with consistent parametric performance across production lots.
Supply support for TZX8V2C-TAP 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, optoelectronics, and passive components for industrial, automotive, and computing markets.
The TZX-Series is designed specifically for precision voltage reference and stabilization in low-power analog systems, emphasizing tight Zener voltage tolerance, low noise, and long-term parametric stability under thermal stress.
FAQ
What is the exact Zener voltage range specified for TZX8V2C-TAP?
The TZX8V2C-TAP has a guaranteed Zener voltage range of 8.1 V to 8.5 V at a test current of 5 mA, as defined in the Vishay TZX-Series datasheet revision 2.7. This 0.4 V span reflects the "C" grade tolerance for the 8.2 V nominal rating and ensures predictable regulation behavior in production circuits without requiring binning or post-assembly calibration.
Does TZX8V2C-TAP support surface-mount assembly?
No, the TZX8V2C-TAP uses the DO-35 (DO-204AH) axial-leaded glass package, which is designed exclusively for through-hole mounting. It is not compatible with reflow or wave soldering processes intended for SMD packages like SOD-123 or DO-213AB. For surface-mount alternatives, consider Vishay's PLZ series or NXP's BZX84-C8V2.
What is the maximum allowable power dissipation for TZX8V2C-TAP at 75 °C ambient?
At 75 °C ambient temperature, the TZX8V2C-TAP's maximum power dissipation is derated to approximately 350 mW, calculated using the thermal resistance RthJA = 300 K/W and the junction temperature limit of 175 °C. This ensures safe operation without exceeding Tj = 175 °C under continuous DC load conditions.
How does the temperature coefficient of TZX8V2C-TAP affect its regulation accuracy?
The TZX8V2C-TAP exhibits a positive temperature coefficient of approximately +5 × 10⁻⁴/K near 8.2 V, meaning its Zener voltage increases by ~0.041 V over a 100 °C rise (e.g., from 25 °C to 125 °C). This must be factored into reference designs requiring sub-0.1 % total error across temperature - often mitigated via compensation networks or system-level calibration.
Is TZX8V2C-TAP suitable for use in automotive applications?
The TZX8V2C-TAP is qualified for industrial temperature range (−65 °C to +175 °C junction) and meets UL 94 V-0 flammability, but it is not AEC-Q200 qualified. While functionally capable in under-hood environments, it lacks formal automotive qualification documentation. For automotive-grade equivalents, consult Vishay's AUTOMOTIVE-grade Zener families such as the BZX84-A series.
TZX8V2C-TAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- TZX
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 6.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
TZX8V2C-TAP FAQ
1.How can I place an order for TZX8V2C-TAP through Aetrix?
Please submit a Request for Quotation (RFQ) for TZX8V2C-TAP 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 TZX8V2C-TAP reliable?
The price and inventory of TZX8V2C-TAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZX8V2C-TAP is usually 5 days.
3.What payment methods are accepted for TZX8V2C-TAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZX8V2C-TAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TZX8V2C-TAP?
TZX8V2C-TAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TZX8V2C-TAP 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 TZX8V2C-TAP?
For technical support, including TZX8V2C-TAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZX8V2C-TAP requirements.
6.How does Aetrix verify that TZX8V2C-TAP is sourced from the original manufacturer or authorized distributors?
All TZX8V2C-TAP 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 TZX8V2C-TAP meets industry standards.
7.What is the process for return or replacement of TZX8V2C-TAP?
All TZX8V2C-TAP units undergo pre-shipment inspection (PSI). If there is an issue with TZX8V2C-TAP, 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 TZX8V2C-TAP part is unused and in its original packaging.
Return procedure for TZX8V2C-TAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TZX8V2C-TAP Tags
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