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Nexperia USA Inc. MM5Z18VT5GF
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- Part No.:
- MM5Z18VT5GF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z18VT5GF.pdf
- Description:
- DIODE ZENER 18V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:39
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Product details
Overview
MM5Z18VT5GF from Nexperia is a 18 V ±2 % tolerance Zener voltage regulator diode in SOD523 (SC-79) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, with 12.6 Ω typical differential resistance at IZ = 5 mA and 12.4–16.0 mV/K temperature coefficient - used for precision low-power voltage reference and overvoltage clamping in space-constrained consumer and industrial PCBs.
For engineers reviewing the MM5Z18VT5GF datasheet, MM5Z18VT5GF pinout, MM5Z18VT5GF application, or MM5Z18VT5GF equivalent, this part supports stable 18 V regulation under low-current bias (IZ = 5 mA), delivers low thermal drift across −55 °C to +150 °C ambient, and integrates into compact DC-DC feedback networks, ESD protection shunts, and analog sensor reference rails.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable 18 V reference across its cathode-anode terminals. Its 12.6 Ω differential resistance ensures minimal voltage deviation under load current shifts up to ±1 mA around nominal IZ, while the 12.4–16.0 mV/K temperature coefficient defines predictable VZ drift versus junction temperature.
The device complies with IEC 60134 absolute maximum ratings, supports 200 mA forward current capability, and achieves 65 K/W thermal resistance from junction to solder point when mounted on FR4 with 35 mm² copper area - enabling reliable operation in thermally dense layouts without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17.64 V to 18.36 V at IZ = 5 mA - defines tight 18 V regulation window for feedback and reference circuits |
| Tolerance | ±2 % - enables accurate voltage setting without post-production trimming in production-grade designs |
| Differential Resistance (rdiff) | 12.6 Ω max at IZ = 5 mA - limits output voltage variation to < ±12.6 mV per ±1 mA load change |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave - supports transient surge suppression in ESD and inductive kickback protection |
| Reverse Current (IR) | ≤ 10 µA at VR = 14.4 V - ensures low leakage in high-impedance bias networks and standby circuits |
| Junction Temperature (Tj) | −55 °C to +150 °C - allows deployment in extended-temperature industrial and automotive-adjacent environments |
Pinout & Package
SOD523 (SC-79) ultra-small surface-mount plastic package with 2 leads, 1.25 mm × 0.85 mm footprint, 0.65 mm height, and cathode band marking on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal; carries reverse-bias current during Zener operation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes reverse-bias path required for voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 package | Enables placement in high-density layouts where board space is constrained to < 1.1 mm² per device |
| ±2 % Zener voltage tolerance | Reduces need for external calibration in 18 V reference applications such as ADC voltage references and LDO feedback dividers |
| Low 12.6 Ω differential resistance | Maintains regulation accuracy within ±0.1 V across 1–10 mA load variations in precision analog circuits |
| 150 °C maximum junction temperature | Supports uninterrupted operation in sealed enclosures or near heat-generating components without derating |
| 40 W non-repetitive surge rating | Provides single-event transient immunity for IEC 61000-4-2 Level 4 ESD (±15 kV air/±8 kV contact) protection shunts |
Applications
| Power Supply Feedback Reference | ESD Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing output voltage of isolated DC-DC converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener diode provides precise 18 V reference to TL431 or optocoupler LED anode, defining regulation threshold. Use Value: Tight ±2 % tolerance and low rdiff ensure converter output remains within ±0.3 % over line/load/temperature variations. |
Use Scenario: Protecting USB data lines against electrostatic discharge events in portable electronics. IC Role / Device Role / Timing Role: Shunt clamp placed between D+ and ground, conducting only above 18 V to divert ESD current. Use Value: 40 W peak surge rating absorbs IEC 61000-4-2 contact discharge energy without degradation or latch-up. |
| Temperature-Stable Sensor Bias | Low-Power Microcontroller Reset Circuit |
|
Use Scenario: Providing excitation voltage to RTD or bridge-based pressure sensors in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Zener supplies constant 18 V bias to sensor Wheatstone bridge, referenced against internal ADC. Use Value: 12.4–16.0 mV/K temperature coefficient enables software compensation using onboard temperature sensor readings. |
Use Scenario: Generating clean reset signal for ARM Cortex-M0 microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Configured with RC network to hold reset pin low until supply reaches stable 18 V threshold. Use Value: Low 10 µA reverse leakage at 14.4 V prevents premature release and ensures deterministic reset timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C18 | Same 18 V nominal, ±5 % tolerance, 200 mW Ptot, SOD523 package | Higher voltage tolerance reduces accuracy in precision feedback; lower power rating limits surge margin | Select when cost sensitivity outweighs regulation accuracy and transient robustness requirements |
| MM3Z18VT1G | Same 18 V nominal, ±2 %, 200 mW Ptot, SOD323 package (larger footprint) | Larger SOD323 increases board area use by 2.5×; identical electrical specs otherwise | Choose only if legacy layout compatibility with SOD323 is mandatory and space permits |
Compared with BZX584-C18 and MM3Z18VT1G, MM5Z18VT5GF uniquely combines ±2 % tolerance, 300 mW power handling, and SOD523 size - making it optimal for next-generation miniaturized power management and protection circuits where accuracy, surge resilience, and footprint are jointly critical.
Availability
MM5Z18VT5GF is available at Aetrix Electronics and suitable for power supply feedback reference, ESD protection clamp, temperature-stable sensor bias, and low-power microcontroller reset circuits requiring stable component supply and consistent parametric performance across production batches.
Supply support for MM5Z18VT5GF 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, delivering optimized solutions for automotive, industrial, mobile, and computing markets.
The MM5Z series targets general-purpose voltage regulation and protection in space-constrained, cost-sensitive applications - emphasizing ultra-small packaging, tight tolerances, and robust surge capability without sacrificing manufacturability.
FAQ
What is the maximum continuous reverse current this Zener can handle at 18 V?
The MM5Z18VT5GF is rated for 300 mW total power dissipation at 25 °C ambient. At 18 V, this corresponds to a maximum continuous reverse current of 16.7 mA (300 mW ÷ 18 V). Derating applies above 25 °C per the 350 K/W junction-to-ambient thermal resistance.
Does this diode meet JEDEC J-STD-020 moisture sensitivity level (MSL) requirements?
Yes - the SOD523 package of MM5Z18VT5GF is rated MSL 1 (unlimited floor life) per JEDEC J-STD-020, meaning it may be stored indefinitely at ≤30 °C/85 % RH without bake preconditioning prior to reflow soldering.
Can this Zener be used in series to achieve higher regulated voltages?
No - series connection of Zener diodes is not recommended due to mismatched temperature coefficients and differential resistances, which cause unequal voltage division and thermal runaway risk. For >18 V regulation, use a single higher-voltage Zener or active regulation.
Is the cathode marking visible under standard optical inspection after reflow?
Yes - the cathode band is a laser-marked black bar on the top surface of the SOD523 package, fully visible under 10× magnification and compatible with automated optical inspection (AOI) systems used in high-volume SMT lines.
MM5Z18VT5GF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- MM5Z
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
MM5Z18VT5GF FAQ
1.How can I place an order for MM5Z18VT5GF through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z18VT5GF 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 MM5Z18VT5GF reliable?
The price and inventory of MM5Z18VT5GF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z18VT5GF is usually 5 days.
3.What payment methods are accepted for MM5Z18VT5GF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z18VT5GF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z18VT5GF?
MM5Z18VT5GF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z18VT5GF 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 MM5Z18VT5GF?
For technical support, including MM5Z18VT5GF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z18VT5GF requirements.
6.How does Aetrix verify that MM5Z18VT5GF is sourced from the original manufacturer or authorized distributors?
All MM5Z18VT5GF 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 MM5Z18VT5GF meets industry standards.
7.What is the process for return or replacement of MM5Z18VT5GF?
All MM5Z18VT5GF units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z18VT5GF, 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 MM5Z18VT5GF part is unused and in its original packaging.
Return procedure for MM5Z18VT5GF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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