My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TLZ24A-GS18
- Part No.:
- TLZ24A-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
TLZ24A-GS18.pdf
- Description:
- DIODE ZENER 24V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:2,276
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLZ24A-GS18 from Vishay Semiconductors is a precision small-signal Zener diode in MiniMELF (SOD-80) package, rated for 22.05 V to 23.18 V nominal zener voltage at 5 mA test current, with dynamic resistance of 35 Ω and reverse leakage ≤0.04 μA at 20.9 V, used for low-noise voltage reference and stabilization in power supply feedback loops.
For engineers reviewing the TLZ24A-GS18 datasheet, TLZ24A-GS18 pinout, TLZ24A-GS18 application, or TLZ24A-GS18 equivalent, key selection considerations include its tight 5% zener tolerance, ultra-low leakage, high stability over temperature, and suitability for space-constrained analog reference designs requiring long-term drift <0.1%/1000 h.
Technical Context
This device operates as a two-terminal voltage reference with sharp reverse breakdown characteristic and low noise performance, optimized for stable DC biasing and regulation in low-current (<10 mA) applications. Its thermal coefficient is +0.035 %/°C (typical), and junction-to-ambient thermal resistance is 500 K/W on standard PCB layout.
The TLZ24A-GS18 exhibits minimal voltage hysteresis and excellent long-term stability due to high-reliability silicon construction and hermetically sealed glass passivation. It supports operation across -65 °C to +175 °C storage range and maintains specified parameters up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.05 V min. to 23.18 V max. at IZT = 5 mA - defines precise regulation point for feedback networks |
| Dynamic Resistance (ZZ) | 35 Ω max. at IZT = 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current (IR) | ≤0.04 μA at VR = 20.9 V - enables ultra-low quiescent current in battery-powered references |
| Power Dissipation (Ptot) | 500 mW max. - supports continuous operation at ambient temperatures up to 125 °C with derating |
| Junction Temperature (Tj) | 175 °C max. - allows use in high-temperature industrial and automotive under-hood environments |
| Package | MiniMELF (SOD-80) - cylindrical glass-body package with 3.3 mm diameter × 5.0 mm length, enabling high reliability and thermal performance |
| Forward Voltage (VF) | 1.5 V max. at IF = 200 mA - supports bidirectional protection or dual-use in clamp circuits |
Pinout & Package
MiniMELF (SOD-80) package: cylindrical glass body with axial leads; cathode identified by black band. Total weight ≈31 mg; UL 94 V-0 molding compound; MSL level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to ground or lower potential in zener mode | Provides low-impedance path for forward conduction; must be held at ≤1.5 V below cathode to avoid forward turn-on |
| Cathode | Negative terminal in forward bias; connected to regulated voltage node in zener mode | Serves as stable reference output; reverse-biased to maintain fixed VZ across varying load currents |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse breakdown | Enables precise, repeatable regulation onset with <100 mV knee spread - critical for low-tolerance feedback |
| Low reverse leakage current | ≤0.04 μA at 90% of VZ minimizes error contribution in high-impedance reference dividers |
| High long-term stability | <0.1% typical drift over 1000 h ensures consistent accuracy in mission-critical instrumentation |
| Low noise performance | Sub-μV RMS noise supports clean references in ADC/DAC biasing and sensor signal conditioning |
| MiniMELF ruggedness | Hermetic glass seal and high-reliability construction deliver >1000 h life at 175 °C junction temperature |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Reference |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference providing stable 22.6 V threshold for TL431-like comparator input. Use Value: Tight 5% VZ tolerance and 35 Ω ZZ ensure ±0.5% output regulation accuracy across line/load/temperature. |
Use Scenario: Biasing bridge-based pressure sensors in engine control units (ECUs). IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric excitation of strain-gauge bridges. Use Value: Ultra-low 0.04 μA leakage prevents offset errors in microamp-level bridge currents. |
| Medical Instrumentation Reference | Test & Measurement Calibration |
|
Use Scenario: Generating stable reference for portable ECG front-end amplifiers. IC Role / Device Role / Timing Role: Low-noise DC reference source for op-amp biasing and ADC reference buffers. Use Value: Sub-μV noise floor preserves signal integrity in sub-μV biomedical signal chains. |
Use Scenario: On-board calibration reference in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Primary voltage standard traceable to factory characterization at 25 °C and 75 °C. Use Value: <0.1% long-term drift supports 1-year calibration intervals without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C24LT1G | 24 V nominal, ±5% tolerance, SOT-23 package, 15 Ω ZZ, 100 nA IR at 20 V | Higher leakage and smaller package limit thermal stability and long-term drift performance | Preferred for cost-sensitive, board-space-constrained designs where ultra-low drift is not required |
| MMBZ5242B | 24 V nominal, ±5% tolerance, SOT-23, 33 Ω ZZ, 100 nA IR at 20 V, Ptot = 350 mW | Lower power rating and higher thermal resistance reduce usable current range in high-temp environments | Suitable for general-purpose regulation where 500 mW dissipation and 175 °C Tj are not needed |
Compared with TLZ24A-GS18, BZX84-C24LT1G offers lower dynamic resistance but sacrifices long-term stability and high-temperature capability, while MMBZ5242B matches tolerance and ZZ closely but lacks the MiniMELF's proven reliability in extended-life industrial deployments.
Availability
TLZ24A-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 availability and traceable sourcing.
Supply support for TLZ24A-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 with emphasis on precision, ruggedness, and longevity.
The TLZ-Series is designed specifically for high-stability voltage reference applications demanding low noise, ultra-low leakage, and exceptional thermal robustness in harsh environments.
FAQ
What is the exact zener voltage range for TLZ24A-GS18 at 5 mA test current?
The TLZ24A-GS18 has a guaranteed zener voltage range of 22.05 V minimum to 23.18 V maximum when tested at IZT = 5 mA and Tamb = 25 °C. This 5% tolerance window is tightly controlled during production screening and is documented in Vishay's official datasheet revision 2.6 (June 2024), document number 85635.
Does TLZ24A-GS18 support operation above 125 °C ambient temperature?
Yes, TLZ24A-GS18 supports continuous operation up to 125 °C ambient temperature when mounted on a standard 50 mm × 50 mm × 1.6 mm PCB, with appropriate power derating per the datasheet's Fig. 1. Its maximum junction temperature is rated at 175 °C, and storage temperature extends from -65 °C to +175 °C - making it suitable for under-hood automotive and industrial control applications.
What is the cathode identification method on TLZ24A-GS18 in MiniMELF package?
The cathode of TLZ24A-GS18 is identified by a black band (cathode ring) on the glass body of the MiniMELF (SOD-80) package. Per Vishay's marking diagram (page 6 of datasheet 85635), the band is visible when viewing the device from the top, and the lead adjacent to the band is the cathode terminal - essential for correct polarity in zener regulation circuits.
How does the dynamic resistance of TLZ24A-GS18 affect regulation accuracy?
TLZ24A-GS18 specifies a maximum dynamic resistance (ZZ) of 35 Ω at IZT = 5 mA. This value directly determines output voltage change under load variation: for example, a 1 mA change in zener current causes ≤35 mV shift in VZ. Lower ZZ improves regulation stiffness, especially critical in feedback loops where loop gain depends on reference stability.
Is TLZ24A-GS18 RoHS-compliant and halogen-free?
Yes, TLZ24A-GS18 complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material categorization standard (document 99912). The MiniMELF package uses UL 94 V-0 compliant molding compound, and full compliance documentation is available through Vishay's website and authorized distribution channels.
TLZ24A-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):
- 24 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 40 nA @ 20.9 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
TLZ24A-GS18 FAQ
1.How can I place an order for TLZ24A-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLZ24A-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 TLZ24A-GS18 reliable?
The price and inventory of TLZ24A-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLZ24A-GS18 is usually 5 days.
3.What payment methods are accepted for TLZ24A-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLZ24A-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLZ24A-GS18?
TLZ24A-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLZ24A-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 TLZ24A-GS18?
For technical support, including TLZ24A-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLZ24A-GS18 requirements.
6.How does Aetrix verify that TLZ24A-GS18 is sourced from the original manufacturer or authorized distributors?
All TLZ24A-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 TLZ24A-GS18 meets industry standards.
7.What is the process for return or replacement of TLZ24A-GS18?
All TLZ24A-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TLZ24A-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 TLZ24A-GS18 part is unused and in its original packaging.
Return procedure for TLZ24A-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLZ24A-GS18 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
