My Inquiry
My Account
onsemi MM5Z12VST1G
- Part No.:
- MM5Z12VST1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z12VST1G.pdf
- Description:
- DIODE ZENER 12V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,108
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MM5Z12VST1G from onsemi is a 12 V, ±4.2% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C with 80 Ω maximum Zener impedance at 5 mA test current and 0.1 μA reverse leakage at 9.6 V. It delivers precision voltage regulation in space-constrained portable electronics such as smartphone power rails and USB interface protection circuits.
For engineers reviewing the MM5Z12VST1G datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 12 V Zener voltage tolerance (11.74–12.24 V), low 130 pF capacitance at 0 V, Class 3 ESD rating (>16 kV HBM), thermal resistance of 250 °C/W, and compatibility with Pb-free reflow up to 260 °C.
Technical Context
This device operates as a two-terminal voltage reference and transient clamp, leveraging avalanche breakdown in silicon PN junction. Its 12 V nominal Zener voltage is specified at 5 mA test current (IZT), with temperature coefficient of +6.0 mV/°C and maximum Zener impedance of 80 Ω at IZT and 25 °C.
The SOD-523 package enables high-density PCB layout with footprint of 1.20 mm × 0.80 mm and height of 0.7 mm. It meets AEC-Q101 stress requirements when ordered as SZ prefix variant and supports MSL 1 handling with no floor life limitation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.74–12.24 V at IZT = 5 mA - defines regulated clamping level for overvoltage protection |
| Power Dissipation (PD) | 500 mW at TA = 25 °C - sets maximum continuous power handling on FR-4 board |
| Zener Impedance (ZZT) | ≤80 Ω at IZT = 5 mA - determines voltage regulation stability under load variation |
| Reverse Leakage (IR) | ≤0.1 μA at VR = 9.6 V - ensures minimal standby current in bias networks |
| Capacitance (C) | ≤130 pF at VR = 0 V, f = 1 MHz - limits high-frequency signal coupling in RF-sensitive circuits |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust electrostatic discharge immunity without external protection |
| Thermal Resistance (RJA) | 250 °C/W - defines junction-to-ambient temperature rise per watt dissipated |
Pinout & Package
SOD-523 surface-mount package: 1.20 mm × 0.80 mm body, 0.7 mm height, matte tin lead finish, void-free thermosetting epoxy meeting UL 94 V-0. Mounting position unrestricted; qualified for 260 °C reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener cathode terminal | Connected to higher-potential node; reverse-biased during regulation/clamping |
| 2 (Anode) | Zener anode terminal | Connected to lower-potential node (typically ground or return path) |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±4.2% (11.74–12.24 V) - enables accurate voltage reference without trimming |
| Low-profile packaging | 0.7 mm max height - fits under low-clearance shields and stacked modules |
| Pb-free and RoHS compliant | 100% matte Sn finish - satisfies global environmental compliance and solderability requirements |
| High ESD robustness | Class 3 HBM (>16 kV) - eliminates need for discrete ESD diodes in many I/O protection schemes |
| MSL 1 rating | No floor life restriction - simplifies inventory management and eliminates bake requirements |
Applications
| Smartphone Power Rail Protection | USB 2.0 Data Line Clamping |
|---|---|
Use Scenario: Protects 12 V bias rail in camera module power supply against load dump transients. IC Role / Device Role / Timing Role: Two-terminal shunt regulator clamping voltage to 12 V during overvoltage events. Use Value: Prevents damage to CMOS image sensor ICs by limiting rail excursion to ≤12.24 V with <0.1 μA leakage at 9.6 V. | Use Scenario: Shields USB D+ and D− lines from ESD strikes during hot-plug insertion. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor operating in reverse breakdown mode. Use Value: Provides >16 kV HBM ESD immunity while adding only 130 pF capacitance to maintain USB 2.0 signal integrity. |
| IoT Sensor Node Reference | Industrial PLC Input Conditioning |
Use Scenario: Supplies stable 12 V reference for analog front-end ADC biasing in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Precision Zener voltage reference with low temperature coefficient (+6.0 mV/°C). Use Value: Maintains reference accuracy within ±0.5% over −40 to +85 °C ambient due to tight 5 mA IZT specification. | Use Scenario: Conditions 24 V DC input signals before feeding into microcontroller GPIO pins. IC Role / Device Role / Timing Role: Overvoltage clamp limiting input to 12.24 V to prevent MCU I/O latch-up. Use Value: Enables direct connection to 24 V industrial bus with only series resistor-no active circuitry required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C12LT1G | Same 12 V nominal, ±5% tolerance (11.4–12.6 V); 300 mW rating; SOD-523 package | Lower power rating reduces thermal margin in sustained clamp scenarios | Select when lower cost and reduced power capability are acceptable trade-offs |
| MMSZ5242B-TP | 12 V nominal, ±5% tolerance; 500 mW rating; SOD-123 package (2.7 × 1.6 mm) | Larger footprint increases PCB area use but improves thermal dissipation margin | Select when board space permits and higher thermal reliability is prioritized over miniaturization |
Compared with BZX584C12LT1G and MMSZ5242B-TP, MM5Z12VST1G offers tighter voltage tolerance (±4.2% vs. ±5%), identical 500 mW rating to MMSZ5242B-TP but in a 55% smaller footprint, making it optimal for ultra-compact designs where regulation precision and space efficiency are jointly critical.
Availability
MM5Z12VST1G is available at Aetrix Electronics and suitable for smartphone power rail protection, USB 2.0 data line clamping, and IoT sensor node reference applications requiring stable component supply and consistent Zener voltage performance across production lots.
Supply support for MM5Z12VST1G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM5ZxxxST1G series is designed specifically for compact, high-reliability voltage regulation and ESD protection in portable and space-constrained electronics, emphasizing tight tolerance, low capacitance, and robust manufacturability.
FAQ
What is the Zener voltage tolerance of MM5Z12VST1G?
The MM5Z12VST1G has a Zener voltage range of 11.74 V to 12.24 V at 5 mA test current, corresponding to a ±4.2% tolerance about the nominal 12 V value. This tight tolerance is confirmed in the Electrical Characteristics table on page 2 of the onsemi datasheet and enables precise voltage clamping without post-production calibration. The MM5Z12VST1G achieves this via process-controlled doping and geometry in the SOD-523 die.
Does MM5Z12VST1G support Pb-free reflow soldering?
Yes, MM5Z12VST1G features 100% matte tin (Sn) lead finish and is qualified for Pb-free reflow up to 260 °C peak temperature, meeting JEDEC J-STD-020 MSL 1 requirements. The device's thermosetting epoxy package is UL 94 V-0 rated and void-free, ensuring reliable interconnect formation without voiding or delamination. This makes MM5Z12VST1G fully compatible with standard lead-free assembly processes.
What is the maximum reverse leakage current for MM5Z12VST1G?
The maximum reverse leakage current for MM5Z12VST1G is 0.1 μA at VR = 9.6 V, as specified in the Electrical Characteristics table. This low leakage ensures minimal power loss in standby bias networks and preserves battery life in portable systems. The MM5Z12VST1G maintains this performance across its full operating temperature range of −65 °C to +150 °C.
How does the ESD rating of MM5Z12VST1G compare to typical I/O protection requirements?
MM5Z12VST1G is rated Class 3 per Human Body Model (>16 kV), exceeding the IEC 61000-4-2 Level 4 requirement (8 kV contact, 15 kV air). This allows MM5Z12VST1G to serve as primary ESD protection on exposed interfaces without supplemental TVS devices. Its 130 pF capacitance at 0 V ensures compatibility with high-speed data lines like USB 2.0, where the MM5Z12VST1G adds negligible signal distortion.
Can MM5Z12VST1G be used in automotive applications?
The SZMM5Z12VST1G variant is AEC-Q101 qualified and PPAP capable for automotive use, while the standard MM5Z12VST1G is intended for commercial and industrial applications. The MM5Z12VST1G shares identical electrical specifications and SOD-523 packaging with the SZ version but lacks automotive-specific traceability and qualification documentation. For non-safety-critical automotive subsystems, MM5Z12VST1G may be considered with customer validation.
MM5Z12VST1G 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:
- ±2%
- Power - Max:
- 500 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
MM5Z12VST1G FAQ
1.How can I place an order for MM5Z12VST1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z12VST1G 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 MM5Z12VST1G reliable?
The price and inventory of MM5Z12VST1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z12VST1G is usually 5 days.
3.What payment methods are accepted for MM5Z12VST1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z12VST1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z12VST1G?
MM5Z12VST1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z12VST1G 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 MM5Z12VST1G?
For technical support, including MM5Z12VST1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z12VST1G requirements.
6.How does Aetrix verify that MM5Z12VST1G is sourced from the original manufacturer or authorized distributors?
All MM5Z12VST1G 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 MM5Z12VST1G meets industry standards.
7.What is the process for return or replacement of MM5Z12VST1G?
All MM5Z12VST1G units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z12VST1G, 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 MM5Z12VST1G part is unused and in its original packaging.
Return procedure for MM5Z12VST1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z12VST1G 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
