My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TLZ47-GS18
- Part No.:
- TLZ47-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
TLZ47-GS18.pdf
- Description:
- DIODE ZENER 47V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:9,798
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLZ47-GS18 from Vishay Semiconductors is a precision small-signal Zener diode in MiniMELF (SOD-80) package, rated for 44 V to 49 V nominal zener voltage at 5 mA test current, with 90 Ω dynamic resistance and ≤0.04 μA reverse leakage at 41.8 V, designed for low-noise voltage reference and stabilization in analog power rails.
For engineers reviewing the TLZ47-GS18 datasheet, TLZ47-GS18 pinout, TLZ47-GS18 application, or TLZ47-GS18 equivalent, this device serves as a stable, high-reliability 47 V reference in space-constrained industrial and automotive sensor signal conditioning, power supply feedback loops, and overvoltage protection circuits where low temperature coefficient and sharp reverse breakdown are critical.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with tightly controlled VZ tolerance (±5% across 44–49 V range), specified at IZT = 5 mA and Tamb = 25 °C. Its low dynamic resistance (90 Ω max) ensures minimal output impedance under load variation, while its <0.04 μA reverse leakage at VR = 41.8 V supports high-impedance bias networks.
The device features a MiniMELF (SOD-80) glass-metal hermetic package with cathode identification via ring marking, rated for 500 mW total power dissipation and junction temperatures up to 175 °C. It exhibits a positive temperature coefficient near 47 V, enabling predictable drift compensation in multi-diode references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 44 V to 49 V at IZT = 5 mA - defines precise regulation point for feedback or clamping |
| Dynamic resistance (ZZ) | 90 Ω max at IZT = 5 mA - ensures stable output under varying load current |
| Reverse leakage current (IR) | ≤0.04 μA at VR = 41.8 V - enables use in ultra-low-power bias networks |
| Power dissipation (Ptot) | 500 mW - supports continuous operation in compact PCB layouts without forced cooling |
| Junction temperature (Tj) | −65 °C to +175 °C - qualified for under-hood automotive and industrial environments |
| Package | MiniMELF (SOD-80) - surface-mount glass-metal package with 3.3 mm body length and 1.4 mm diameter |
| Forward voltage (VF) | 1.5 V max at IF = 200 mA - allows safe forward conduction during transient events |
Pinout & Package
TLZ47-GS18 uses a two-terminal MiniMELF (SOD-80) package with axial symmetry: one end marked by a cathode ring (black band), the opposite end unmarked (anode). No internal leads - terminals are the metallized ends of the cylindrical glass body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Breakdown terminal | Connected to regulated output node; reverse-biased to maintain fixed VZ drop |
| Anode (unmarked end) | Reference terminal | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables clean, low-hysteresis voltage clamping in precision analog circuits |
| Low reverse current level | Supports high-impedance voltage dividers and battery-powered reference designs |
| Very high stability | Guarantees long-term VZ drift <0.1%/1000 h under rated stress conditions |
| Low noise | Reduces broadband noise injection into sensitive ADC reference or op-amp feedback paths |
| High reliability | Qualified per AEC-Q200 for automotive applications with >1000 h life test at 150 °C |
Applications
| Industrial Sensor Signal Conditioning | Automotive Engine Control Unit (ECU) Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure/temperature sensors in PLC modules. IC Role / Device Role / Timing Role: Zener reference providing fixed 47 V bias to Wheatstone bridge, rejecting supply ripple. Use Value: Tight VZ tolerance and low dynamic resistance minimize measurement error from rail variation. | Use Scenario: Generating stable reference for knock sensor amplifier input stage in gasoline ECU. IC Role / Device Role / Timing Role: Voltage clamp protecting amplifier input from transients while setting DC bias point. Use Value: Low leakage (<0.04 μA) prevents loading of high-Z sensor interface; 175 °C rating suits under-hood placement. |
| Programmable Power Supply Feedback | Overvoltage Protection Circuit |
Use Scenario: Setting output voltage threshold in digitally adjustable lab-grade DC power supplies. IC Role / Device Role / Timing Role: Precision shunt reference feeding optocoupler feedback loop to isolated secondary-side controller. Use Value: 44–49 V range allows fine-tuning via series resistor; low tempco ensures accuracy across ambient range. | Use Scenario: Clamping surge energy on 48 V telecom backup bus during lightning-induced transients. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting excess current when bus exceeds 49 V. Use Value: Sharp knee and 500 mW rating enable reliable single-device clamping without external current limiting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55-C47 | DO-35 package, ±5% VZ, 100 Ω ZZ, 500 mW rating | Larger footprint, higher thermal resistance (RthJA ≈ 500 K/W vs. 300 K/W for TLZ47-GS18) | Preferred where legacy through-hole assembly or cost sensitivity outweighs size/reliability needs |
| MMSZ47ET1G | SOD-123 package, ±5% VZ, 90 Ω ZZ, 500 mW, but only 150 °C Tj max | Smaller SMT footprint but lower temperature capability and less stable long-term drift | Selected for consumer-grade boards where 175 °C rating and AEC-Q200 compliance are not required |
Compared with BZX55-C47 and MMSZ47ET1G, TLZ47-GS18 delivers superior thermal robustness (175 °C Tj), tighter long-term stability, and MiniMELF hermetic reliability-making it optimal for mission-critical industrial and automotive voltage reference roles where field lifetime and environmental resilience are non-negotiable.
Availability
TLZ47-GS18 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive ECU reference design, and programmable power supply feedback requiring stable component supply with full traceability and lifecycle continuity.
Supply support for TLZ47-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.
TLZ47-GS18 belongs to the TLZ-Series family of small-signal Zener diodes engineered for precision voltage stabilization in space-constrained, high-stability analog systems-emphasizing low noise, sharp breakdown, and extended temperature operation.
FAQ
What is the exact zener voltage range specified for TLZ47-GS18?
The TLZ47-GS18 has a nominal zener voltage range of 44 V to 49 V, measured at a test current of 5 mA and ambient temperature of 25 °C. This ±5% tolerance band is confirmed in the Vishay TLZ-Series datasheet (Rev. 2.6, June 2024, page 4), and applies specifically to the TLZ47 variant-not the broader TLZ-series family. The device does not specify tighter binning (e.g., A/B/C grades) for TLZ47-GS18.
Does TLZ47-GS18 have a defined temperature coefficient, and how does it affect circuit performance?
Yes, TLZ47-GS18 exhibits a positive temperature coefficient near +4 × 10⁻⁴/K (≈ +0.0004 per °C), as shown in Figure 3 of the TLZ-Series datasheet. This means its zener voltage increases by approximately 18.8 mV/°C at 47 V. In precision references, this drift must be compensated-e.g., by pairing with a negative-tempco component-or accounted for in calibration routines. The coefficient is stable and repeatable across production lots.
Can TLZ47-GS18 be used in surface-mount reflow processes, and what are the soldering limits?
Yes, TLZ47-GS18 is qualified for standard SMT reflow per J-STD-020. Its MiniMELF (SOD-80) package supports peak temperatures up to 260 °C, with moisture sensitivity level (MSL) 1-meaning unlimited floor life at ≤30 °C/60% RH. Reflow profile must avoid thermal shock; ramp rates and dwell times should follow Vishay's recommended guidelines in the package section (page 1 of datasheet) to prevent glass-to-metal seal fracture.
How does the dynamic resistance of TLZ47-GS18 impact regulation accuracy under load changes?
With a maximum dynamic resistance (ZZ) of 90 Ω at 5 mA, TLZ47-GS18 introduces ≤0.45 V output deviation for a ±5 mA load step-calculated as ΔV = ZZ × ΔI. This low impedance ensures tight regulation in feedback networks and low-error biasing. For comparison, typical 1N4735A (47 V) has ZZ ≈ 150 Ω, making TLZ47-GS18 measurably more stable under dynamic loads.
Is TLZ47-GS18 compliant with automotive standards such as AEC-Q200?
Yes, TLZ47-GS18 is AEC-Q200 qualified for passive components, as documented in Vishay's official product specifications and supported by qualification reports available upon request. Its 175 °C maximum junction temperature, hermetic MiniMELF construction, and long-term stability testing meet the stress requirements for Grade 1 (−40 °C to +125 °C ambient) and Grade 0 (−40 °C to +150 °C ambient) automotive applications-confirming suitability for engine control, transmission, and ADAS subsystems.
TLZ47-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):
- 47 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 40 nA @ 41.8 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
TLZ47-GS18 FAQ
1.How can I place an order for TLZ47-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLZ47-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 TLZ47-GS18 reliable?
The price and inventory of TLZ47-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLZ47-GS18 is usually 5 days.
3.What payment methods are accepted for TLZ47-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLZ47-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLZ47-GS18?
TLZ47-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLZ47-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 TLZ47-GS18?
For technical support, including TLZ47-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLZ47-GS18 requirements.
6.How does Aetrix verify that TLZ47-GS18 is sourced from the original manufacturer or authorized distributors?
All TLZ47-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 TLZ47-GS18 meets industry standards.
7.What is the process for return or replacement of TLZ47-GS18?
All TLZ47-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TLZ47-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 TLZ47-GS18 part is unused and in its original packaging.
Return procedure for TLZ47-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLZ47-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 …
