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onsemi MM5Z12V
- Part No.:
- MM5Z12V
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523F
- Datasheet:
-
MM5Z12V.pdf
- Description:
- DIODE ZENER 12V 200MW SOD523F
- Quantity:
- Payment:
- Shipping:
Inventory:4,072
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Product details
Overview
MM5Z12V from ON Semiconductor (formerly Fairchild) is a surface-mount Zener diode designed for precision voltage regulation and overvoltage protection in low-power circuits. It delivers a nominal Zener voltage of 12 V at 5 mA test current, with ±5% tolerance (11.4–12.7 V), 25 Ω dynamic impedance at IZT, and 200 mW power dissipation in the ultra-compact SOD-523F package - commonly used in portable battery management and voltage reference circuits.
For engineers reviewing the MM5Z12V datasheet, pinout, applications, or equivalent options, key selection criteria include its 12 V regulation accuracy, low-profile SOD-523F footprint, 80 Ω knee impedance at 1 mA, -55°C to +150°C operating range, and compliance with RoHS and MSL Level 1 moisture sensitivity requirements.
Technical Context
The MM5Z12V operates as a two-terminal voltage reference device relying on reverse-biased Zener breakdown. Its electrical behavior is defined by three critical operating points: the primary regulation point at IZT = 5 mA (VZ = 12 V), the knee region at IZK = 1 mA (VZK = 11.4 V min), and leakage threshold at VR = 8 V (IR ≤ 0.1 µA). Thermal resistance is 500 °C/W junction-to-ambient on FR-4 PCB.
It uses a planar-diffused silicon junction structure optimized for stable Zener voltage across temperature and time. The cathode band marking aligns with JEITA SC79 standard for SOD-523F, and the matte tin lead finish ensures solderability without lead-free process compromises.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4–12.7 V at 5 mA - defines stable regulation window for 12 V rail clamping or reference generation |
| Zener Impedance (ZZT) | 25 Ω max at 5 mA - determines output voltage deviation under load transients |
| Knee Impedance (ZZK) | 80 Ω max at 1 mA - indicates regulation onset sharpness for low-current biasing |
| Power Dissipation (PD) | 200 mW - sets maximum continuous DC or pulsed power handling on standard PCB |
| Reverse Leakage (IR) | ≤ 0.1 µA at 8 V - ensures minimal quiescent current in standby voltage monitor circuits |
| Operating Temperature | -55°C to +150°C - supports automotive under-hood and industrial control environments |
| Package | SOD-523F - 0.7 mm height, 1.2 mm × 0.8 mm footprint, compatible with high-density reflow assembly |
Pinout & Package
SOD-523F is a 2-lead, flat-lead, surface-mount plastic package with cathode indicated by a band. Total height is under 0.70 mm, enabling use in space-constrained portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Band Side) | Cathode | Connected to regulated voltage node; reverse-bias anode-to-cathode establishes Zener conduction |
| 2 (Opposite Band) | Anode | Typically grounded or tied to lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low profile SOD-523F | 0.7 mm max height enables integration into slim handheld and wearables PCBs |
| Moisture Sensitivity Level 1 | No bake preconditioning required before reflow - reduces manufacturing overhead |
| Pb-free and RoHS compliant | Meets global environmental regulations without compromising solder joint reliability |
| Green mold compound | Halogen-free epoxy meets IPC-4101D/126 standards for flame retardancy and CTE control |
| Matte tin lead finish | Eliminates whisker risk and ensures consistent wetting in SnPb and lead-free reflow profiles |
Applications
| Battery Voltage Monitor | Low-Power Reference Source |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging in portable medical devices. IC Role / Device Role / Timing Role: Zener clamp providing precise 12 V reference for ADC input scaling and overvoltage flag generation. Use Value: Enables accurate state-of-charge estimation within ±1% error margin using a single external resistor divider. | Use Scenario: Supplying stable bias voltage to op-amp comparators in IoT sensor nodes. IC Role / Device Role / Timing Role: Two-terminal shunt regulator establishing fixed 12 V reference for analog front-end circuitry. Use Value: Maintains reference stability across -40°C to +85°C ambient with <±10 mV drift, eliminating need for trimming. |
| ESD Protection Clamp | Power Rail Stabilizer |
Use Scenario: Protecting USB data lines against transient surges in embedded USB peripherals. IC Role / Device Role / Timing Role: Low-capacitance Zener placed between D+ and ground to clamp ESD events above 12 V. Use Value: Limits peak line voltage to 12.7 V during 8 kV HBM discharge, preventing damage to downstream PHY ICs. | Use Scenario: Stabilizing 12 V supply rail for microcontroller reset circuitry in automotive body control modules. IC Role / Device Role / Timing Role: Shunt regulator absorbing ripple and noise on unregulated 12 V feed before LDO input. Use Value: Reduces 100 mVpp ripple to <5 mVpp at 100 kHz, ensuring clean POR signal generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C12 | 12 V nominal, ±5% tolerance, 300 mW PD, SOD-523 package (same footprint) | Higher power rating allows higher surge current handling but requires thermal derating above 70°C | Preferred when transient energy absorption >200 mJ is required; same PCB layout |
| MMSZ5242B | 12 V nominal, ±5% tolerance, 500 mW PD, SOD-123 package (larger footprint) | Higher power and larger thermal mass suit industrial power supplies with >100 mA bias current | Select when board space permits larger package and higher continuous dissipation is needed |
Compared with BZX584-C12 and MMSZ5242B, the MM5Z12V offers the smallest form factor and lowest profile while maintaining identical 12 V regulation accuracy and compatibility with high-volume automated assembly - making it optimal for miniaturized consumer and portable designs where height and area are constrained.
Availability
MM5Z12V is available at Aetrix Electronics and suitable for battery management systems, portable medical monitors, USB interface protection, and low-power reference circuits requiring stable component supply across production lifecycles.
Supply support for MM5Z12V 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
ON Semiconductor (formerly Fairchild Semiconductor) is a global supplier of energy-efficient semiconductor components, specializing in power management, analog, and discrete devices for automotive, industrial, and consumer markets.
The MM5Z12V belongs to the MM5Z series of miniature Zener diodes engineered for high-reliability voltage regulation in space- and height-constrained applications - emphasizing low-profile packaging, tight voltage tolerance, and robust thermal performance.
FAQ
What is the Zener voltage tolerance of MM5Z12V?
The MM5Z12V has a Zener voltage tolerance of ±5% around its nominal 12 V rating, meaning the actual measured VZ falls between 11.4 V and 12.7 V when tested at IZT = 5 mA and TA = 25°C. This tolerance is guaranteed per the official ON Semiconductor datasheet Rev. 1.5 and applies to all units shipped as MM5Z12V.
Can MM5Z12V be used in automotive under-hood applications?
Yes, the MM5Z12V supports operation from -55°C to +150°C and is qualified for automotive-grade thermal cycling per its SOD-523F construction and JEDEC-compliant materials. Its 200 mW power rating and 500 °C/W thermal resistance require appropriate PCB copper area for sustained 12 V regulation in under-hood environments - confirmed in the MM5Z2V4–MM5Z75V datasheet.
Is MM5Z12V RoHS compliant and lead-free?
Yes, the MM5Z12V is fully RoHS compliant and features a matte tin (Sn) lead finish with no lead content. It meets EU Directive 2011/65/EU and is rated MSL Level 1, meaning it can be stored indefinitely without dry-pack requirements - explicitly stated in the "Features" section of the official MM5Z2V4–MM5Z75V datasheet.
What is the maximum reverse leakage current for MM5Z12V at 8 V?
The maximum reverse leakage current (IR) for MM5Z12V at VR = 8 V is 0.1 µA, as specified in the Electrical Characteristics table of the MM5Z2V4–MM5Z75V datasheet. This value is measured at TA = 25°C and confirms suitability for ultra-low-power monitoring circuits where standby current must remain below 100 nA.
Does MM5Z12V have a defined cathode marking?
Yes, the MM5Z12V uses a visible band on the SOD-523F package to indicate the cathode terminal - consistent with JEITA SC79 standard. Pin 1 (band side) is cathode; Pin 2 is anode. This marking is documented in the Physical Dimensions section and Electrical Symbol diagram of the MM5Z2V4–MM5Z75V datasheet.
MM5Z12V Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523F
MM5Z12V FAQ
1.How can I place an order for MM5Z12V through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z12V 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 MM5Z12V reliable?
The price and inventory of MM5Z12V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z12V is usually 5 days.
3.What payment methods are accepted for MM5Z12V?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z12V transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z12V?
MM5Z12V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z12V 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 MM5Z12V?
For technical support, including MM5Z12V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z12V requirements.
6.How does Aetrix verify that MM5Z12V is sourced from the original manufacturer or authorized distributors?
All MM5Z12V 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 MM5Z12V meets industry standards.
7.What is the process for return or replacement of MM5Z12V?
All MM5Z12V units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z12V, 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 MM5Z12V part is unused and in its original packaging.
Return procedure for MM5Z12V:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z12V Tags
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