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Vishay General Semiconductor - Diodes Division TZX7V5B-TAP
- Part No.:
- TZX7V5B-TAP
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
TZX7V5B-TAP.pdf
- Description:
- DIODE ZENER 7.5V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:8,142
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Product details
Overview
TZX7V5B-TAP from Vishay Semiconductors is a silicon planar Zener diode optimized for precision voltage regulation and stabilization in low-power analog circuits. It delivers a nominal Zener voltage of 7.5 V (min 7.2 V, max 7.6 V) at 5 mA test current, with dynamic resistance of 15 Ω and reverse leakage current ≤30 μA at 5 V, housed in the DO-35 (DO-204AH) glass package.
For engineers reviewing the TZX7V5B-TAP datasheet, TZX7V5B-TAP pinout, TZX7V5B-TAP application, or TZX7V5B-TAP equivalent, this device serves as a stable reference in power supply feedback loops, sensor biasing networks, and overvoltage protection circuits where tight tolerance and low noise are critical.
Technical Context
The TZX7V5B-TAP operates as a single-element, two-terminal voltage reference diode with sharp reverse breakdown characteristics and high long-term stability. Its thermal resistance junction-to-ambient is 300 K/W (lead length = 4 mm), and maximum junction temperature is rated at 175 °C.
Designed for operation at 5 mA test current, it exhibits a temperature coefficient of approximately +6 × 10⁻⁴/K near 7.5 V, enabling predictable drift behavior across industrial temperature ranges. The device supports continuous DC dissipation up to 500 mW under specified thermal conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.2–7.6 V at IZT = 5 mA - defines precise regulation window for feedback or reference use |
| Dynamic Resistance (ZZ) | 15 Ω at IZT = 5 mA - ensures minimal output impedance and high regulation accuracy under load variation |
| Reverse Leakage Current (IR) | ≤30 μA at VR = 5 V - guarantees low standby power loss and stable quiescent behavior |
| Power Dissipation (Ptot) | 500 mW at TL = 25 °C, l = 4 mm - sets maximum continuous DC operating limit with standard lead mounting |
| Junction Temperature (Tj) | −65 to +175 °C - enables reliable operation in extended industrial and automotive ambient environments |
| Forward Voltage (VF) | ≤1.5 V at IF = 200 mA - confirms low-conduction-loss forward conduction for bidirectional clamp applications |
Pinout & Package
Package: DO-35 (DO-204AH), axial glass body with cathode band marking; total weight ≈125 mg; UL 94 V-0 molding compound; MSL Level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / high-side connection | Marked by band; connected to input rail or regulated node; carries reverse current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables clean, well-defined breakdown onset-critical for accurate threshold detection and low-hysteresis clamping |
| Low reverse leakage current | ≤30 μA at 5 V ensures minimal error contribution in high-impedance reference paths and battery-powered systems |
| High long-term stability | Guarantees <±2% parametric shift over 1000 hours at rated stress-supports design longevity without recalibration |
| Low noise performance | Reduces voltage reference jitter in precision ADCs, DACs, and analog signal chains requiring clean DC bias |
| DO-35 glass package | Provides hermetic reliability, compatibility with wave/reflow soldering (peak 260 °C), and proven field history in industrial designs |
Applications
| Voltage Reference for Op-Amp Circuits | Overvoltage Clamp in Sensor Interfaces |
|---|---|
|
Use Scenario: Provides stable 7.5 V reference for instrumentation amplifier biasing and offset trimming in industrial transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference establishing fixed DC potential for analog front-end calibration. Use Value: Tight 7.2–7.6 V tolerance and 15 Ω dynamic resistance minimize gain error and improve measurement repeatability. |
Use Scenario: Protects 8-bit microcontroller ADC inputs from transient overvoltage events in HVAC sensor nodes. IC Role / Device Role / Timing Role: Bidirectional clamp limiting input voltage to safe levels while maintaining low-leakage signal integrity. Use Value: ≤30 μA leakage at 5 V preserves sensor output accuracy; fast response prevents latch-up during ESD pulses. |
| Feedback Element in Linear Regulators | Threshold Detector in Power Sequencing |
|
Use Scenario: Sets output voltage in discrete 12 V → 7.5 V linear regulator for FPGA auxiliary rails. IC Role / Device Role / Timing Role: Precision shunt element in TL431-like feedback network controlling pass transistor gate. Use Value: 500 mW power rating allows robust operation under line/load transients; DO-35 form factor eases board layout. |
Use Scenario: Triggers reset logic when main supply exceeds 7.5 V during cold-start sequencing in motor control drives. IC Role / Device Role / Timing Role: Zener-based comparator input threshold generator with defined hysteresis via resistor divider. Use Value: Sharp reverse knee enables repeatable trip point; low temperature coefficient minimizes drift across −40 to +125 °C. |
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 |
|---|---|---|---|
| BZX55C7V5 (Nexperia) | Same 7.5 V nominal rating, but wider tolerance (6.8–8.2 V); higher ZZ = 30 Ω; DO-35 package | Lower regulation accuracy; suitable for non-critical biasing where cost is prioritized over precision | Select when ±7% VZ tolerance and higher dynamic impedance are acceptable in cost-sensitive consumer designs |
| 1N4733A (ON Semiconductor) | 7.5 V nominal, tighter 7.14–7.88 V range; higher Ptot = 1 W; DO-41 package (larger footprint) | Higher power handling but requires PCB real estate adjustment; not drop-in due to different package dimensions | Choose when >500 mW dissipation is needed and board layout permits DO-41 footprint change |
Compared with TZX7V5B-TAP, BZX55C7V5 trades regulation precision for lower unit cost, while 1N4733A offers higher power margin at the expense of board space and thermal interface redesign-neither is pin-compatible, but both serve overlapping functional roles in voltage reference and clamp circuits.
Availability
TZX7V5B-TAP is available at Aetrix Electronics and suitable for industrial sensor conditioning, power supply feedback networks, and overvoltage protection circuits requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for TZX7V5B-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 part of Vishay's small-signal Zener diode family engineered for precision voltage stabilization in space-constrained, low-power analog systems-emphasizing stability, low noise, and manufacturability in DO-35 packaging.
FAQ
What is the Zener voltage tolerance of the TZX7V5B-TAP?
The TZX7V5B-TAP has a guaranteed Zener voltage range of 7.2 V to 7.6 V at 5 mA test current, corresponding to ±0.2 V absolute tolerance around the nominal 7.5 V rating. This tight spread supports high-accuracy regulation without external trimming. The TZX7V5B-TAP achieves this via process-controlled doping and wafer-level screening per Vishay's Rev. 2.7 specification.
Can the TZX7V5B-TAP be used in surface-mount designs?
No-the TZX7V5B-TAP is only offered in the axial DO-35 (DO-204AH) through-hole glass package and is not available in SMD variants such as SOD-123 or SOD-323. For surface-mount alternatives, engineers should consider Vishay's PLZ series or other manufacturer equivalents explicitly rated for SMT assembly. The TZX7V5B-TAP requires manual or wave soldering with lead length ≥4 mm for thermal derating compliance.
What is the maximum allowable power dissipation for the TZX7V5B-TAP at 75 °C ambient?
At 75 °C ambient temperature, the TZX7V5B-TAP's maximum power dissipation is derated to approximately 333 mW, calculated using its 300 K/W thermal resistance and 175 °C maximum junction temperature (Pmax = (Tj(max) − Tamb) / RthJA). This ensures safe operation without exceeding thermal limits. Always verify actual board-level thermal performance when using the TZX7V5B-TAP in enclosed or high-airflow-limited environments.
Does the TZX7V5B-TAP have a specified temperature coefficient?
Yes-the TZX7V5B-TAP exhibits a typical temperature coefficient of +6 × 10⁻⁴/K near its 7.5 V operating point, as shown in Figure 4 of the Vishay datasheet (Doc. #85614). This positive coefficient means its Zener voltage increases ~0.045 V per 75 °C rise above 25 °C. Designers must account for this drift in precision references; the TZX7V5B-TAP is best suited for applications where ±1% total variation across −40 to +125 °C is acceptable.
Is the TZX7V5B-TAP suitable for bidirectional ESD protection?
No-the TZX7V5B-TAP is a unidirectional Zener diode optimized for DC voltage regulation, not transient suppression. While it conducts in forward bias (VF ≤ 1.5 V at 200 mA), its reverse breakdown is not characterized for fast ESD pulse handling (e.g., IEC 61000-4-2). For ESD protection, dedicated TVS diodes such as Vishay's ESD9L series are recommended. The TZX7V5B-TAP should not be substituted for ESD-rated devices in safety-critical interfaces.
TZX7V5B-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):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- 175°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
TZX7V5B-TAP FAQ
1.How can I place an order for TZX7V5B-TAP through Aetrix?
Please submit a Request for Quotation (RFQ) for TZX7V5B-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 TZX7V5B-TAP reliable?
The price and inventory of TZX7V5B-TAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZX7V5B-TAP is usually 5 days.
3.What payment methods are accepted for TZX7V5B-TAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZX7V5B-TAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TZX7V5B-TAP?
TZX7V5B-TAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TZX7V5B-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 TZX7V5B-TAP?
For technical support, including TZX7V5B-TAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZX7V5B-TAP requirements.
6.How does Aetrix verify that TZX7V5B-TAP is sourced from the original manufacturer or authorized distributors?
All TZX7V5B-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 TZX7V5B-TAP meets industry standards.
7.What is the process for return or replacement of TZX7V5B-TAP?
All TZX7V5B-TAP units undergo pre-shipment inspection (PSI). If there is an issue with TZX7V5B-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 TZX7V5B-TAP part is unused and in its original packaging.
Return procedure for TZX7V5B-TAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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