My Inquiry
My Account
onsemi MM3Z30VT1G
- Part No.:
- MM3Z30VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z30VT1G.pdf
- Description:
- DIODE ZENER 30V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:50,578
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MM3Z30VT1G from onsemi is a 30 V, 2 mA Zener voltage regulator diode in SOD−323 package with 300 mW power dissipation, ±5% voltage tolerance, 80 Ω dynamic impedance at 2 mA, and 0.05 μA leakage current at 21.0 V reverse bias - used for precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the MM3Z30VT1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, ESD robustness (Class 3, >16 kV HBM), Pb-free SOD−323 mechanical dimensions, and validated alternative Zeners for low-power regulation design.
Technical Context
The MM3Z30VT1G operates as a two-terminal voltage reference device relying on controlled reverse-biased Zener breakdown. Its nominal 30 V regulation is specified at IZT = 2 mA, with dynamic impedance ZZT = 80 Ω and temperature coefficient of +24.4 mV/°C - enabling stable reference generation across −65°C to +150°C junction range.
Designed for surface-mount use on FR-4 PCBs, it delivers 300 mW steady-state dissipation at 25°C ambient, derating linearly at 2.4 mW/°C above that point. Its SOD−323 package (1.7 mm × 1.25 mm × 0.9 mm) supports high-density layouts while maintaining UL 94 V−0 flammability rating and 260°C soldering tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal, 28–32 V min/max range at IZT = 2 mA - defines precise clamping threshold for protection or reference circuits. |
| Power Dissipation (PD) | 300 mW at TA = 25°C - sets maximum continuous power handling before thermal derating applies. |
| Zener Impedance (ZZT) | 80 Ω max at IZT = 2 mA - determines output voltage stability under varying load or ripple conditions. |
| Leakage Current (IR) | 0.05 μA max at VR = 21.0 V - ensures minimal standby current in battery-powered systems. |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - provides robust handling immunity during assembly and field operation. |
| Package | SOD−323 (Case 477) - 1.7 mm × 1.25 mm footprint with cathode band marking, compatible with standard pick-and-place and reflow processes. |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood, industrial control, and extended-temperature portable environments. |
Pinout & Package
SOD−323 surface-mount package with molded plastic case, cathode indicated by polarity band. Dimensions: 1.7 mm × 1.25 mm × 0.9 mm (L × W × H); weight: 4.507 mg/unit; mounting position: any.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener cathode terminal | Connected to regulated voltage node; reverse-biased during regulation; marked with polarity band. |
| 2 (Anode) | Zener anode terminal | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free Construction | RoHS-compliant SOD−323 package with Sn-only or Pb−Sn plating - meets global environmental compliance without performance trade-off. |
| Low Profile Height | 0.9 mm max body height - enables stacking under shields or integration into ultra-thin handheld PCBs. |
| High ESD Robustness | Class 3 HBM (>16 kV) - eliminates need for external ESD protection in consumer interface circuits. |
| Thermal Stability | Temperature coefficient +24.4 mV/°C - enables predictable drift compensation in reference designs across operating temperature range. |
| Small Outline Footprint | 1.7 mm × 1.25 mm pad area - reduces board space by >50% vs. traditional DO-35 or SOD-123 packages. |
Applications
| Smartphone Power Rail Protection | IoT Sensor Reference Voltage |
|---|---|
Use Scenario: Clamping 3.3 V or 5 V supply rails against transient surges in LTE/Wi-Fi modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector downstream of DC-DC converters. Use Value: Prevents latch-up or damage to baseband processors using only 300 mW dissipation and sub-1 mm height. | Use Scenario: Providing stable 30 V reference for analog front-end gain calibration in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC reference divider networks. Use Value: Enables <±0.5% initial accuracy and <50 ppm/°C drift tracking via tight 28–32 V VZ tolerance and known tempco. |
| Wearable Battery Monitoring | Industrial PLC Input Conditioning |
Use Scenario: Monitoring Li-ion cell voltage during charging cycles in hearables and smartwatches. IC Role / Device Role / Timing Role: Zener-based voltage divider element feeding microcontroller ADC inputs. Use Value: Delivers consistent scaling ratio with 0.05 μA leakage - extending battery life beyond 72 hours per charge cycle. | Use Scenario: Level-shifting and surge suppression for 24 V digital input channels in factory automation controllers. IC Role / Device Role / Timing Role: Passive clamp protecting optocoupler input stages from induced transients. Use Value: Withstands repeated 1 kV/μs fast transients without degradation due to 300 mW pulse-rated capability and AEC-Q101 qualification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B30,115 | Same 30 V nominal Zener, but SOD-323 package with 400 mW PD, 60 Ω ZZT, and higher leakage (1 μA @ 24 V). | Higher power margin suits intermittent surge clamping; less suitable for ultra-low-leakage reference use. | Select when needing extra thermal headroom or tighter dynamic impedance, accepting higher standby current. |
| MMSZ5256ET1G | 30 V Zener in SOD-123 package, 500 mW PD, 35 Ω ZZT, but larger footprint (3.5 mm × 1.6 mm) and no AEC-Q101 rating. | Preferred for high-reliability industrial power supplies where board space is less constrained. | Choose when prioritizing lower impedance and higher power over miniaturization and automotive qualification. |
Compared with BZX384-B30,115 and MMSZ5256ET1G, the MM3Z30VT1G offers the smallest footprint and AEC-Q101 qualification among 30 V Zeners, making it optimal for space-limited, automotive-grade, or battery-sensitive designs - though with slightly higher ZZT and lower PD than alternatives.
Availability
MM3Z30VT1G is available at Aetrix Electronics and suitable for smartphone power rail protection, IoT sensor reference voltage generation, and wearable battery monitoring requiring stable component supply with full traceability and lifecycle support.
Supply support for MM3Z30VT1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and edge applications.
The MM3Z30VT1G belongs to the MM3ZxxxT1G Zener regulator series designed specifically for compact, high-reliability voltage reference and overvoltage protection in portable and automotive electronics.
FAQ
What is the Zener voltage tolerance of MM3Z30VT1G?
The MM3Z30VT1G has a Zener voltage tolerance of ±5% around its nominal 30 V rating, meaning the actual measured VZ falls between 28 V and 32 V when tested at IZT = 2 mA and TA = 25°C. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the official datasheet and applies to all units shipped under this part number.
Does MM3Z30VT1G support automotive applications?
Yes, the MM3Z30VT1G is AEC-Q101 qualified and PPAP capable when ordered as SZMM3Z30VT1G. The standard MM3Z30VT1G variant shares identical electrical and mechanical specifications but is not certified for automotive use; designers requiring automotive qualification must specify the SZ-prefix version to ensure compliance with stress testing and process controls mandated by AEC-Q101.
What is the maximum reverse leakage current for MM3Z30VT1G?
The maximum reverse leakage current for MM3Z30VT1G is 0.05 μA at VR = 21.0 V and TA = 25°C, as specified in the Electrical Characteristics table. This ultra-low leakage supports long battery life in always-on sensor nodes and portable devices where standby current directly impacts operational duration.
Can MM3Z30VT1G be used in place of a 24 V Zener diode?
No - the MM3Z30VT1G is a fixed 30 V Zener diode with no user-adjustable voltage. It cannot substitute for a 24 V Zener such as MM3Z24VT1G because its regulation threshold (28–32 V) is outside the 24 V device's 22.8–25.6 V range. Using it in a 24 V circuit would result in insufficient clamping or unintended forward conduction, risking system malfunction.
What is the thermal resistance junction-to-ambient for MM3Z30VT1G?
The thermal resistance junction-to-ambient (RJA) for MM3Z30VT1G is 416°C/W when mounted on a single-sided FR-4 PCB with 1 cm² copper pad, as stated in the Maximum Ratings table. This value governs temperature rise under load and must be applied when calculating safe operating area for continuous 300 mW dissipation or pulsed operation.
MM3Z30VT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±7%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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-323
MM3Z30VT1G FAQ
1.How can I place an order for MM3Z30VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z30VT1G 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 MM3Z30VT1G reliable?
The price and inventory of MM3Z30VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z30VT1G is usually 5 days.
3.What payment methods are accepted for MM3Z30VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z30VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z30VT1G?
MM3Z30VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z30VT1G 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 MM3Z30VT1G?
For technical support, including MM3Z30VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z30VT1G requirements.
6.How does Aetrix verify that MM3Z30VT1G is sourced from the original manufacturer or authorized distributors?
All MM3Z30VT1G 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 MM3Z30VT1G meets industry standards.
7.What is the process for return or replacement of MM3Z30VT1G?
All MM3Z30VT1G units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z30VT1G, 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 MM3Z30VT1G part is unused and in its original packaging.
Return procedure for MM3Z30VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z30VT1G 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…
