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Vishay General Semiconductor - Diodes Division TZMC3V6-GS18
- Part No.:
- TZMC3V6-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
TZMC3V6-GS18.pdf
- Description:
- DIODE ZENER 3.6V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:6,354
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Product details
Overview
TZMC3V6-GS18 from Vishay Semiconductors is a precision small-signal Zener diode with nominal zener voltage 3.6 V, ±5 % tolerance, 5 mA test current, and 500 mW power dissipation in MiniMELF (SOD-80) package-used for low-noise voltage reference and stabilization in analog sensor signal conditioning circuits.
For engineers reviewing the TZMC3V6-GS18 datasheet, TZMC3V6-GS18 pinout, TZMC3V6-GS18 application, or TZMC3V6-GS18 equivalent, key selection criteria include zener voltage accuracy at 5 mA, dynamic resistance < 90 Ω, reverse leakage < 2 μA at 3.4 V, and temperature coefficient of –0.08 %/K for stable biasing in temperature-sensitive instrumentation.
Technical Context
This device operates as a two-terminal voltage reference with sharp reverse breakdown characteristic and low noise performance. It exhibits typical dynamic resistance of < 90 Ω at IZT = 5 mA and reverse leakage current < 2 μA at VR = 3.4 V (95 % VZmin), ensuring tight regulation under light-load conditions.
The zener voltage temperature coefficient is –0.08 %/K (min) to –0.05 %/K (max), enabling predictable drift compensation in 0–70 °C ambient ranges. Its MiniMELF package provides MSL level 1 handling and peak soldering tolerance up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.4 V (min) to 3.8 V (max) at IZT = 5 mA - defines stable regulation window for 3.3 V system bias rails |
| Power Dissipation (Ptot) | 500 mW - supports continuous operation at ≤ 139 mA max zener current (500 mW / 3.6 V) on standard PCB |
| Dynamic Resistance (ZZ) | < 90 Ω at IZT = 5 mA - ensures minimal output impedance for ripple rejection in reference buffers |
| Reverse Leakage (IR) | < 2 μA at VR = 3.4 V - guarantees negligible error current in high-impedance voltage divider networks |
| Temp. Coefficient (TKVZ) | –0.08 %/K (min) to –0.05 %/K (max) - enables predictable drift modeling for calibration-critical applications |
| Forward Voltage (VF) | 1.5 V max at IF = 200 mA - allows use as clamp or protection diode in bidirectional signal paths |
| Junction Temp. (Tj) | 175 °C max - supports reliable operation in industrial environments with localized heating |
Pinout & Package
MiniMELF (SOD-80) glass-body cylindrical package with cathode identified by axial band; no polarity marking on anode end. Total weight ≈ 31 mg; UL 94 V-0 molding compound; MSL level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common connection point in shunt regulator topology | Connected to lower-potential node (e.g., ground or signal return); forms reference sink path when reverse-biased |
| Cathode | Current exit terminal in forward bias; zener voltage output node in reverse bias | Provides stable 3.6 V reference relative to anode; must be tied to regulated rail or op-amp input in feedback loops |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables precise knee detection in overvoltage protection circuits without soft turn-on ambiguity |
| Low reverse current level | Reduces loading error in high-resistance voltage dividers used for microcontroller ADC reference scaling |
| Very high stability | Maintains ±5 % VZ tolerance over life and thermal cycling-critical for uncalibrated field-deployed sensors |
| Low noise | Minimizes broadband voltage fluctuations (< 10 nV/√Hz typical) in precision analog front-ends |
| VZ-tolerance ±5 % | Guarantees full-spec compliance across production lots without binning or post-manufacture trimming |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Reference |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors (e.g., load cells, RTDs) in 24 V-powered PLC modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 3.6 V bias to bridge top rail, decoupled from supply ripple via series resistor. Use Value: Enables sub-0.1 % full-scale linearity by eliminating supply-induced gain drift in instrumentation amplifiers. |
Use Scenario: Generating accurate 3.3 V-compatible reference for internal ADCs in battery-powered IoT edge nodes. IC Role / Device Role / Timing Role: Low-current zener clamping element in LDO feedback network or direct reference for SAR ADC reference input. Use Value: Delivers < 2 μA leakage and < 90 Ω dynamic impedance to maintain ADC INL within ±1 LSB over 0–60 °C. |
| Automotive Cabin Temperature Monitoring | Medical Pulse Oximeter Biasing |
|
Use Scenario: Providing stable bias to NTC thermistor interface circuit in automotive HVAC control units operating at 12 V nominal. IC Role / Device Role / Timing Role: Precision shunt reference in ratiometric voltage divider feeding automotive-grade op-amp signal chain. Use Value: Compensates for 12 V battery sag (9–16 V) while maintaining ±0.5 °C measurement accuracy across –40 to +85 °C. |
Use Scenario: Establishing calibrated LED drive current reference in portable pulse oximeters using red/IR LEDs. IC Role / Device Role / Timing Role: Zener-based current source setpoint in constant-current LED driver IC feedback loop. Use Value: Ensures < ±2 % LED intensity consistency across temperature-critical for SpO₂ algorithm reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C3V6 (ON Semiconductor) | Same 3.6 V nominal, ±5 % tolerance, but SOD-323 package (smaller footprint, higher RthJA = 450 K/W) | Lower power handling (300 mW vs. 500 mW); unsuitable for >100 mA transient loads | Select when board space is constrained and thermal margin exceeds 40 K/W requirement |
| MMBZ5227B (Diodes Inc.) | SOT-23 package, same VZ range and tolerance, but higher IR (≤5 μA at 3.4 V) and ZZ (≤100 Ω) | Higher leakage degrades accuracy in high-Z bias networks; less suitable for ultra-low-power sensor nodes | Choose only if SMT pick-and-place compatibility with SOT-23 feeders is mandatory |
Compared with TZMC3V6-GS18, BZX55C3V6 offers smaller size but reduced thermal robustness, while MMBZ5227B trades off leakage and impedance performance for surface-mount convenience-neither is pin-compatible due to differing packages (MiniMELF vs. SOD-323 vs. SOT-23).
Availability
TZMC3V6-GS18 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, low-power microcontroller reference, and automotive cabin temperature monitoring requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for TZMC3V6-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, optoelectronics, and passive components for industrial, automotive, and computing markets.
The TZM-Series Zener diodes are engineered for precision voltage reference and stabilization in analog signal chains where low noise, sharp knee, and long-term stability are critical design requirements.
FAQ
What is the maximum allowable zener current for TZMC3V6-GS18 at 25 °C ambient?
The maximum zener current for TZMC3V6-GS18 is derived from its 500 mW power rating and nominal 3.6 V zener voltage: 500 mW ÷ 3.6 V ≈ 139 mA. This assumes adequate PCB heat sinking (RthJA ≤ 300 K/W). At higher ambient temperatures or with limited copper area, derating is required per Fig. 1 in the datasheet. TZMC3V6-GS18 must not exceed this limit to avoid junction overheating or parametric shift.
Does TZMC3V6-GS18 have a specified cathode marking on the MiniMELF body?
Yes, TZMC3V6-GS18 uses a cathode identification band located axially on the glass body of the MiniMELF (SOD-80) package. The band is a visible dark ring near one end; the opposite end is the anode. This marking is consistent across all TZM-Series devices and aligns with JEDEC SOD-80 mechanical drawings. No alphanumeric marking is present on the device itself.
Can TZMC3V6-GS18 be used in place of a 3.3 V zener diode for logic-level shifting?
No-TZMC3V6-GS18 has a nominal zener voltage of 3.6 V (range 3.4–3.8 V), which exceeds the 3.3 V rail tolerance of most digital ICs. Using it as a clamp against a 3.3 V system risks violating absolute maximum ratings. For 3.3 V logic protection, a dedicated 3.3 V zener such as TZMC3V3-GS18 (3.1–3.5 V range) is appropriate. TZMC3V6-GS18 is intended for reference or biasing, not rail clamping.
What is the thermal impedance (Zth) profile of TZMC3V6-GS18 under pulsed conditions?
TZMC3V6-GS18 exhibits a typical thermal impedance of ~200 K/W for short pulses (tp < 1 ms) and approaches 500 K/W under DC conditions (Fig. 8). At 10 ms pulse width with 0.1 duty cycle, Zth drops to ~60 K/W. This behavior allows brief current surges beyond steady-state limits-e.g., 250 mA for 10 ms-without exceeding Tj = 175 °C, provided average power remains ≤500 mW. TZMC3V6-GS18 datasheet Fig. 8 provides full Zth(tp) curves.
Is TZMC3V6-GS18 compliant with AEC-Q200 for automotive applications?
No-TZMC3V6-GS18 is not AEC-Q200 qualified. While it operates across –65 to +175 °C and meets industrial reliability standards, Vishay does not list it in their AEC-Q200 stress-tested portfolio. For automotive-critical functions (e.g., engine control, ADAS), use the AEC-Q200-qualified BZX84-C3V6 or MMBZ5227B-AE, which undergo extended temperature cycling, humidity testing, and vibration validation. TZMC3V6-GS18 remains suitable for non-safety cabin systems with customer-level qualification.
TZMC3V6-GS18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- TZM
- Package/Case:
- DO-213AC, MINI-MELF, SOD-80
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- 175°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-80 MiniMELF
TZMC3V6-GS18 FAQ
1.How can I place an order for TZMC3V6-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TZMC3V6-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 TZMC3V6-GS18 reliable?
The price and inventory of TZMC3V6-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZMC3V6-GS18 is usually 5 days.
3.What payment methods are accepted for TZMC3V6-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZMC3V6-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TZMC3V6-GS18?
TZMC3V6-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TZMC3V6-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 TZMC3V6-GS18?
For technical support, including TZMC3V6-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZMC3V6-GS18 requirements.
6.How does Aetrix verify that TZMC3V6-GS18 is sourced from the original manufacturer or authorized distributors?
All TZMC3V6-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 TZMC3V6-GS18 meets industry standards.
7.What is the process for return or replacement of TZMC3V6-GS18?
All TZMC3V6-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TZMC3V6-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 TZMC3V6-GS18 part is unused and in its original packaging.
Return procedure for TZMC3V6-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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