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onsemi MM5Z12VT1
- Part No.:
- MM5Z12VT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z12VT1.pdf
- Description:
- DIODE ZENER 12V 100MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,844
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Product details
Overview
MM5Z12VT1 from onsemi is a 12 V, 100 mW Zener diode in SOD−523 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 12.0 V at 5 mA test current, with ±0.7 V tolerance (11.4–12.7 V), 25 Ω dynamic impedance at IZT, and 0.1 µA reverse leakage at 8.0 V.
For engineers reviewing the MM5Z12VT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its low-profile 1.20 mm × 0.80 mm footprint, Class 3 ESD rating (>16 kV HBM), −65 °C to +150 °C operating range, and suitability for portable power rail clamping and reference stabilization.
Technical Context
The MM5Z12VT1 operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain stable voltage across its cathode-anode terminals under regulated current conditions. Its thermal coefficient of +6.0 mV/°C ensures predictable drift behavior near room temperature, and its 130 pF capacitance at 0 V supports high-frequency noise suppression in DC bias networks.
Designed for surface-mount assembly on FR-5 boards, it meets MSL 1 reflow requirements (260 °C peak) and features 100% matte tin lead finish. The SOD−523 package enables placement in ultra-dense layouts where height ≤ 0.7 mm is critical - such as cellular phone power management IC bypass paths and sensor signal conditioning front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.0 V nominal at 5 mA; ensures stable 11.4–12.7 V regulation window for 3.3 V/5 V rail monitoring. |
| Power Rating (PD) | 100 mW at TA = 25 °C; limits continuous dissipation to avoid thermal runaway in compact PCB areas. |
| Zener Impedance (ZZT) | 25 Ω at IZT = 5 mA; maintains tight voltage regulation under varying load currents in feedback loops. |
| Reverse Leakage (IR) | 0.1 µA max at VR = 8.0 V; minimizes standby current draw in battery-powered systems. |
| ESD Rating | Class 3 (>16 kV HBM); protects downstream circuitry during handling and board-level integration. |
| Package Dimensions | 1.20 mm × 0.80 mm × 0.70 mm; fits within 1.6 mm² area, enabling use in wearables and miniaturized IoT sensors. |
Pinout & Package
SOD−523 surface-mount package: ultra-compact, void-free thermosetting plastic case with matte tin leads; mounting position unrestricted; qualified for 260 °C reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked) | Cathode | Connected to higher-potential node; reverse-biased terminal where Zener breakdown occurs. |
| 2 | Anode | Connected to lower-potential node (e.g., ground or return path); completes conduction path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD−523 package | Height ≤ 0.7 mm enables stacking under shields and routing beneath fine-pitch BGAs. |
| Stable 12 V reference with ±5.8% tolerance | Supports accurate threshold detection in 12 V supply supervisors and reset generators. |
| 100% matte tin lead finish | Ensures solderability compatibility with lead-free and SnPb processes without whisker risk. |
| High ESD immunity (Class 3) | Reduces need for external TVS devices in handheld product ESD protection schemes. |
Applications
| Smartphone Power Rail Clamp | IoT Sensor Bias Reference |
|---|---|
|
Use Scenario: Clamping transient spikes on 12 V camera module power input in LTE-enabled smartphones. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing surge energy above 12.7 V while maintaining safe voltage for image sensor ICs. Use Value: Prevents latch-up in CMOS image sensors by limiting overvoltage to <13 V with sub-µA leakage at nominal bias. |
Use Scenario: Providing stable 12 V reference for analog front-end amplifiers in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Passive voltage reference source for ADC reference dividers and op-amp biasing networks. Use Value: Delivers 12.0 V ±0.7 V with 25 Ω dynamic impedance, minimizing reference error contribution to <0.3% full-scale in 12-bit measurements. |
| Wearable Battery Monitor | Industrial PLC Input Protection |
|
Use Scenario: Regulating charging voltage sense line in compact fitness trackers using Li-ion cells with 12 V boost converters. IC Role / Device Role / Timing Role: Precision Zener element in resistive divider network feeding battery fuel gauge IC. Use Value: Enables ±1% state-of-charge accuracy via 12.0 V reference stability across −20 °C to +70 °C operating range. |
Use Scenario: Protecting 12 V digital input channels on programmable logic controllers against field-wiring transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed before optocoupler input stage. Use Value: Absorbs 100 mW surges without degradation, extending optocoupler lifetime and reducing false-trigger events in factory automation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C12 | 12 V, 300 mW, SOD-323 package (1.7 × 1.3 mm); 15 Ω ZZT; 0.5 µA IR @ 8 V | Higher power handling but larger footprint; better for sustained 10–20 mA regulation | Select when >100 mW dissipation or lower dynamic impedance is required; not drop-in due to size and thermal mass mismatch |
| MMSZ5242B | 12 V, 500 mW, SOD-123 package (3.7 × 1.6 mm); 30 Ω ZZT; 0.1 µA IR @ 8 V | Higher power rating and same leakage, but 3× larger area and 2× height | Choose for legacy designs with SOD-123 footprints or where thermal margin >300 mW is needed; requires PCB layout change |
Compared with BZX584-C12 and MMSZ5242B, the MM5Z12VT1 offers the smallest board area and lowest profile for 12 V regulation, trading off power capacity for miniaturization - ideal when space is constrained and average dissipation stays below 100 mW.
Availability
MM5Z12VT1 is available at Aetrix Electronics and suitable for smartphone power rail clamping, IoT sensor bias reference, and wearable battery monitor applications requiring stable component supply, consistent parametric performance, and long-term sourcing continuity.
Supply support for MM5Z12VT1 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MM5Z12VT1 belongs to the MM5Z series of miniature Zener regulators, engineered specifically for space-critical portable electronics where ultra-small size, high reliability, and robust ESD performance are mandatory design requirements.
FAQ
What is the maximum steady-state power dissipation of the MM5Z12VT1?
The MM5Z12VT1 has a maximum steady-state power rating of 100 mW at ambient temperature (TA) = 25 °C on an FR-5 board. Derating is required above 25 °C per the datasheet's thermal resistance curve; at 70 °C ambient, usable power drops to approximately 70 mW to maintain junction temperature within −65 °C to +150 °C limits. This makes the MM5Z12VT1 suitable for low-duty-cycle clamping or reference roles, not continuous high-current regulation.
Does the MM5Z12VT1 have a specified temperature coefficient, and how does it affect regulation accuracy?
Yes, the MM5Z12VT1 has a maximum temperature coefficient of +6.0 mV/°C. This means its Zener voltage increases by up to 6.0 mV per degree Celsius rise in junction temperature. Over a −20 °C to +85 °C operating range, this contributes up to ±630 mV drift from nominal 12.0 V - a ±5.25% variation. For precision references, this must be compensated in system-level calibration or paired with temperature-stable circuit topologies.
What is the reverse leakage current specification for the MM5Z12VT1, and why does it matter in battery-powered designs?
The MM5Z12VT1 specifies a maximum reverse leakage current (IR) of 0.1 µA at VR = 8.0 V and TA = 25 °C. In battery-powered applications like wearables or remote sensors, this ultra-low leakage directly extends battery life - for example, in a 200 mAh coin cell powering a sensor node drawing 1 µA sleep current, adding 0.1 µA leakage from the MM5Z12VT1 increases total quiescent draw by only 10%, preserving runtime integrity without requiring active switching.
Can the MM5Z12VT1 be used as a substitute for the MM5Z12V in a design?
Yes, the MM5Z12VT1 is the tape-and-reel packaged version of the MM5Z12V Zener diode - identical electrically and mechanically. The "T1" suffix denotes packaging format (3000 units per reel), not a functional variant. Both share identical Zener voltage (11.4–12.7 V), impedance (25 Ω), leakage (0.1 µA), and SOD−523 footprint. No redesign or validation is needed when migrating from MM5Z12V to MM5Z12VT1 for production builds.
What is the marking code for the MM5Z12VT1 on the SOD−523 package?
The MM5Z12VT1 is marked with "0N" on the top surface of the SOD−523 package, per the device marking table in the onsemi datasheet. This two-character code uniquely identifies the 12 V variant within the MM5Z series and is laser-etched or ink-marked for traceability. The marking appears adjacent to the cathode band, which is located at pin 1 - confirming polarity during automated optical inspection and manual placement.
MM5Z12VT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 100 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
MM5Z12VT1 FAQ
1.How can I place an order for MM5Z12VT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z12VT1 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 MM5Z12VT1 reliable?
The price and inventory of MM5Z12VT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z12VT1 is usually 5 days.
3.What payment methods are accepted for MM5Z12VT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z12VT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z12VT1?
MM5Z12VT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z12VT1 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 MM5Z12VT1?
For technical support, including MM5Z12VT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z12VT1 requirements.
6.How does Aetrix verify that MM5Z12VT1 is sourced from the original manufacturer or authorized distributors?
All MM5Z12VT1 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 MM5Z12VT1 meets industry standards.
7.What is the process for return or replacement of MM5Z12VT1?
All MM5Z12VT1 units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z12VT1, 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 MM5Z12VT1 part is unused and in its original packaging.
Return procedure for MM5Z12VT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z12VT1 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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SMAZ12-13-F
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