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Vishay General Semiconductor - Diodes Division TZQ5258B-GS18
- Part No.:
- TZQ5258B-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-80 Variant
- Datasheet:
-
TZQ5258B-GS18.pdf
- Description:
- DIODE ZENER 36V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:9,406
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Product details
Overview
TZQ5258B-GS18 from Vishay Semiconductors is a precision small-signal Zener diode with nominal zener voltage of 36 V, ±5 % tolerance, 3.4 mA test current (IZT), < 0.1 μA reverse leakage at VR, and 27 Ω dynamic resistance at IZT - designed for stable voltage reference and regulation in low-power analog circuits.
For engineers reviewing the TZQ5258B-GS18 datasheet, TZQ5258B-GS18 pinout, TZQ5258B-GS18 application, or TZQ5258B-GS18 equivalent, this device is selected for high-stability biasing, precision shunt regulation, and low-noise voltage clamping where thermal drift control and tight VZ tolerance are critical.
Technical Context
This Zener operates under DC conditions at thermal equilibrium with case temperature maintained at 30 °C ± 2 °C; its voltage regulation relies on sharp reverse breakdown with low noise and very high stability over time and temperature.
The device exhibits a positive temperature coefficient of +0.093 %/K and is rated for 500 mW total power dissipation with junction temperature up to 175 °C - enabling reliable operation in compact, thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal, ±5 % tolerance - ensures predictable clamping level across production lots and operating life. |
| Test Current (IZT) | 3.4 mA - defines the standard operating point for VZ specification and dynamic resistance measurement. |
| Dynamic Resistance (ZZ) | 27 Ω at IZT - indicates low AC impedance for effective ripple suppression in reference circuits. |
| Reverse Leakage (IR) | < 0.1 μA at VR - minimizes parasitic current draw in high-impedance bias networks. |
| Temperature Coefficient (TKVZ) | +0.093 %/K - enables predictable VZ drift compensation in temperature-sensitive designs. |
| Power Dissipation (Ptot) | 500 mW - supports continuous operation at ambient temperatures up to 95 °C on standard FR-4 PCBs. |
| Junction Temperature (Tj) | 175 °C maximum - allows use in industrial and automotive under-hood environments with proper thermal design. |
Pinout & Package
QuadroMELF (SOD-80) glass-body surface-mount package: cylindrical, axial-leaded, cathode identified by band; no discrete pins - terminals are anode and cathode ends of the glass-encapsulated silicon die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit ground or lower-potential rail when used in shunt regulation configuration. |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 36 V reference relative to anode; marked with color band for polarity identification. |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables precise, low-hysteresis voltage clamping without soft knee behavior near VZ. |
| Low reverse leakage current | < 0.1 μA at VR ensures negligible loading in high-Z feedback or reference divider networks. |
| High stability over time and temperature | Specified for thermal equilibrium operation with < ±0.093 %/K TKVZ and minimal long-term drift. |
| Low noise performance | Supports use in precision analog signal chains where Zener-induced noise must be minimized. |
| UL 94 V-0 molding compound | Meets flammability safety requirements for industrial and consumer end-equipment certifications. |
Applications
| Industrial Sensor Signal Conditioning | Programmable Logic Controller (PLC) Input Protection |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter front-end op-amps and ADC biasing in harsh factory environments. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 36 V rail for precision current loop excitation and isolation amplifier biasing. Use Value: Tight ±5 % VZ tolerance and +0.093 %/K TKVZ allow accurate sensor scaling over -40 °C to +85 °C without calibration drift. |
Use Scenario: Overvoltage clamping on 24 V DC digital input channels exposed to field wiring transients and ESD events. IC Role / Device Role / Timing Role: Passive transient suppressor placed across input optocoupler terminals to limit voltage to safe levels during surge events. Use Value: Low 27 Ω dynamic resistance ensures fast response to fast-rising transients while maintaining < 0.1 μA leakage during normal operation. |
| Medical Instrumentation Power Rails | Automotive Body Control Module (BCM) Reference |
|
Use Scenario: Generating stable bias for low-noise instrumentation amplifiers in portable diagnostic devices with battery-powered operation. IC Role / Device Role / Timing Role: Low-noise Zener reference source feeding precision DACs and analog front-ends requiring clean, drift-free voltage references. Use Value: Very low noise and high stability enable sub-mV accuracy in EEG/ECG signal paths without additional filtering or trimming. |
Use Scenario: Providing regulated 36 V reference for window comparator circuits monitoring battery voltage and load-dump protection thresholds. IC Role / Device Role / Timing Role: Zener-based threshold detector element in analog supervisor ICs or discrete fault-monitoring subsystems. Use Value: 175 °C max junction temperature rating and MSL Level 1 handling support under-hood BCM placement with no derating required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C36 (ON Semiconductor) | Same 36 V nominal VZ, ±5 %, but higher ZZ (40 Ω) and higher IR (≤ 0.5 μA); DO-35 package (larger footprint). | Less suitable for space-constrained PCBs and ultra-low-leakage bias networks due to higher IR and larger SOD-35 body. | Select TZQ5258B-GS18 when QuadroMELF's smaller SOD-80 footprint, lower leakage, and tighter thermal response are required. |
| MMBZ5258BLT1G (onsemi) | SOT-23 package, same 36 V VZ, ±5 %, but higher ZZ (35 Ω) and higher IR (≤ 0.5 μA); rated for only 225 mW Ptot. | Not recommended for continuous 500 mW operation or high-temperature ambient environments (> 70 °C). | Choose TZQ5258B-GS18 for higher power handling, superior thermal stability, and proven long-term reliability in industrial-grade applications. |
Compared with BZX55C36 and MMBZ5258BLT1G, TZQ5258B-GS18 delivers lower dynamic resistance, lower leakage, higher power rating, and superior thermal coefficient control - making it optimal for precision shunt regulation where stability, size, and reliability are jointly critical.
Availability
TZQ5258B-GS18 is available at Aetrix Electronics and suitable for industrial sensor conditioning, PLC input protection, and medical instrumentation requiring stable component supply with full traceability and lifecycle continuity.
Supply support for TZQ5258B-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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors with emphasis on reliability, precision, and ruggedized performance.
The TZQ52xxB series is part of Vishay's precision Zener portfolio engineered for high-stability voltage reference and regulation in industrial, medical, and automotive systems demanding low noise and long-term repeatability.
FAQ
What is the nominal zener voltage and tolerance of TZQ5258B-GS18?
The TZQ5258B-GS18 has a nominal zener voltage of 36 V with a tolerance of ±5 %, specified at 3.4 mA test current under thermal equilibrium conditions. This tolerance ensures consistent voltage regulation across manufacturing batches and supports accurate design margining in precision analog circuits.
What package type does TZQ5258B-GS18 use, and what are its key mechanical features?
TZQ5258B-GS18 uses the QuadroMELF (SOD-80) package: a glass-encapsulated cylindrical surface-mount device weighing approximately 34 mg, with UL 94 V-0 flammability rating and MSL Level 1 moisture sensitivity. Its cathode is marked with a visible band, and it requires no PCB footprint changes versus other SOD-80 Zeners.
How does the temperature coefficient of TZQ5258B-GS18 affect its performance in varying ambient conditions?
TZQ5258B-GS18 has a temperature coefficient of +0.093 %/K, meaning its zener voltage increases predictably with rising junction temperature. This positive TKVZ allows designers to compensate for thermal drift in multi-stage reference circuits and ensures monotonic behavior across -65 °C to +175 °C storage and operational ranges.
What is the maximum power dissipation rating for TZQ5258B-GS18, and how is it validated?
TZQ5258B-GS18 is rated for 500 mW total power dissipation under conditions where thermal resistance from junction to ambient (RthJA) is ≤ 300 K/W. This rating is validated per JEDEC standards and assumes mounting on a standard 50 mm × 50 mm × 1.6 mm FR-4 PCB - enabling robust operation without forced cooling in most industrial applications.
Can TZQ5258B-GS18 be used in low-noise analog signal paths, and why?
Yes, TZQ5258B-GS18 is explicitly characterized for low-noise operation, supported by its "very low noise" feature and sharp reverse breakdown characteristic. Its low dynamic resistance (27 Ω) and minimal leakage (< 0.1 μA) prevent signal corruption in precision op-amp biasing, ADC reference, and sensor excitation circuits where noise floor integrity is essential.
TZQ5258B-GS18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- SOD-80 Variant
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 27 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-80 QuadroMELF
TZQ5258B-GS18 FAQ
1.How can I place an order for TZQ5258B-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TZQ5258B-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 TZQ5258B-GS18 reliable?
The price and inventory of TZQ5258B-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZQ5258B-GS18 is usually 5 days.
3.What payment methods are accepted for TZQ5258B-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZQ5258B-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TZQ5258B-GS18?
TZQ5258B-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TZQ5258B-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 TZQ5258B-GS18?
For technical support, including TZQ5258B-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZQ5258B-GS18 requirements.
6.How does Aetrix verify that TZQ5258B-GS18 is sourced from the original manufacturer or authorized distributors?
All TZQ5258B-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 TZQ5258B-GS18 meets industry standards.
7.What is the process for return or replacement of TZQ5258B-GS18?
All TZQ5258B-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TZQ5258B-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 TZQ5258B-GS18 part is unused and in its original packaging.
Return procedure for TZQ5258B-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TZQ5258B-GS18 Tags
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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