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onsemi MMSZ3V0T1
- Part No.:
- MMSZ3V0T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ3V0T1.pdf
- Description:
- DIODE ZENER 3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,391
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Product details
Overview
MMSZ3V0T1 from onsemi is a 3.0 V ±5% Zener voltage regulator diode in SOD−123 surface-mount package, rated for 500 mW power dissipation at 75°C, with 95 Ω dynamic impedance at 5 mA test current and 10 µA reverse leakage at 1 V reverse bias - used for precision low-voltage reference and overvoltage protection in power management circuits.
For engineers reviewing the MMSZ3V0T1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, AEC−Q101 qualification status, ESD robustness (Class 3, >16 kV HBM), and direct replacement guidance for low-power voltage regulation design.
Technical Context
This device operates as a two-terminal silicon Zener diode optimized for stable reverse-bias voltage regulation at nominal 3.0 V. It exhibits a temperature coefficient of approximately +2.1 mV/°C near its nominal Zener voltage and maintains regulation under DC currents from 0.1 mA to 20 mA.
The SOD−123 package enables automated placement and reflow soldering with UL 94 V−0 flammability rating and 260°C/10s maximum soldering temperature tolerance. Its junction-to-ambient thermal resistance is 340°C/W on FR−5 board, supporting operation across −55°C to +150°C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.85 V min / 3.0 V nom / 3.15 V max @ IZT = 5 mA - defines tight ±5% regulation window for low-voltage reference stability |
| Dynamic Impedance (ZZT) | 95 Ω max @ IZT = 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | 10 µA max @ VR = 1 V - guarantees low standby current in battery-powered sensing nodes |
| Power Dissipation (PD) | 500 mW @ TL = 75°C, derated 6.7 mW/°C above - sets practical continuous operating limit on standard PCB |
| Thermal Resistance (RJA) | 340°C/W - determines junction temperature rise under given ambient and layout conditions |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - supports robust handling in non-cleanroom assembly environments |
| Junction Temp Range | −55°C to +150°C - enables use in automotive under-hood and industrial control applications |
Pinout & Package
SOD−123 surface-mount plastic package (Case 425, Style 1), 1.60 mm × 2.69 mm × 1.16 mm, cathode indicated by polarity band. Void-free thermosetting case with corrosion-resistant, solderable finish and UL 94 V−0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables regulation in space-constrained, low-power systems without external heat sinking |
| AEC−Q101 Qualified | Validates reliability for automotive electronics including body control modules and sensor interfaces |
| Pb−Free (RoHS Compliant) | Meets global environmental compliance requirements for commercial and industrial production |
| Small SOD−123 Footprint | Supports high-density PCB layouts in portable medical devices and IoT edge nodes |
| Class 3 ESD Robustness | Reduces need for external transient suppression in handheld and field-deployable equipment |
Applications
| Automotive Sensor Reference | Industrial PLC Input Protection |
|---|---|
Use Scenario: Providing stable 3.0 V reference for analog front-end circuitry in engine coolant temperature sensors. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference and overvoltage clamp for ADC input stage. Use Value: Maintains ±5% reference accuracy across −40°C to +125°C while limiting fault current during load dump events. |
Use Scenario: Protecting digital input channels of programmable logic controllers from 24 V field wiring surges. IC Role / Device Role / Timing Role: Shunt clamping device that diverts excess energy before it reaches downstream optocoupler or MCU GPIO. Use Value: Limits transient voltage to ≤3.15 V with <10 µA leakage, preserving signal integrity and reducing false triggering. |
| USB-C Port Voltage Clamp | Low-Power Wearable Battery Monitor |
Use Scenario: Clamping CC line voltage in USB-C receptacles to prevent damage from miswired adapters. IC Role / Device Role / Timing Role: Bidirectional overvoltage protector leveraging forward conduction (<0.95 V @ 10 mA) and reverse Zener action. Use Value: Responds within nanoseconds to fast transients while adding negligible capacitance (<2 pF at 1 V bias). |
Use Scenario: Monitoring lithium coin-cell voltage in hearables using a microcontroller's internal ADC. IC Role / Device Role / Timing Role: Precision shunt reference enabling accurate battery state-of-charge estimation. Use Value: Delivers 3.0 V ±5% regulation with only 10 µA leakage, extending battery life beyond 12 months in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V0 | 3.0 V ±5%, 300 mW rating, SOT−23 package, higher ZZT (150 Ω) | Lower power handling limits use in high-current regulation; smaller footprint but higher thermal resistance | Select when board space is critical and peak power remains below 300 mW |
| MM3Z3V0T1 | 3.0 V ±5%, 200 mW rating, SOD−323 package, 120 Ω ZZT, same AEC−Q101 qualification | Reduced power capability restricts use to ultra-low-power signal conditioning only | Prefer for miniaturized wearables where 200 mW suffices and 0.85 mm height is mandatory |
Compared with MMSZ3V0T1, BZX84-C3V0 offers smaller SOT−23 size but sacrifices 40% power margin and increases dynamic impedance; MM3Z3V0T1 matches automotive qualification but halves power capacity and raises impedance - making MMSZ3V0T1 optimal for balanced performance in space-constrained yet thermally demanding designs.
Availability
MMSZ3V0T1 is available at Aetrix Electronics and suitable for automotive sensor references, industrial PLC input protection, and low-power wearable battery monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MMSZ3V0T1 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, and consumer markets.
The MMSZxxxT1G series was designed specifically for high-reliability, surface-mount Zener regulation in space-constrained and thermally demanding applications - emphasizing AEC−Q101 qualification, low leakage, and consistent ±5% voltage tolerance.
FAQ
What is the Zener voltage tolerance for MMSZ3V0T1?
The MMSZ3V0T1 has a nominal Zener voltage of 3.0 V with a standard tolerance of ±5%, resulting in a guaranteed range of 2.85 V to 3.15 V at IZT = 5 mA and TA = 25°C. This tolerance remains valid across the full operating temperature range of −55°C to +150°C, as confirmed in the onsemi datasheet revision 13.
Is MMSZ3V0T1 qualified for automotive applications?
Yes, MMSZ3V0T1 is AEC−Q101 qualified and PPAP capable, meeting stress test requirements for automotive electronics including temperature cycling, humidity bias, and mechanical shock. It is explicitly listed in the datasheet as qualified for automotive and other high-reliability applications.
What is the maximum reverse leakage current for MMSZ3V0T1?
The maximum reverse leakage current for MMSZ3V0T1 is 10 µA at VR = 1 V and TA = 25°C. This value is specified in the Electrical Characteristics table on page 2 of the official onsemi datasheet and reflects worst-case leakage under nominal bias conditions.
Can MMSZ3V0T1 be used in place of MMSZ3V3T1G?
No - MMSZ3V0T1 and MMSZ3V3T1G regulate at different nominal voltages (3.0 V vs. 3.3 V) with non-overlapping tolerance bands (2.85–3.15 V vs. 3.14–3.47 V). Substitution would cause functional failure in circuits relying on precise 3.3 V reference or clamping thresholds.
What is the thermal resistance of MMSZ3V0T1 on FR−5 board?
The junction-to-ambient thermal resistance (RJA) of MMSZ3V0T1 is 340°C/W when mounted on FR−5 board, as measured via infrared scan method per Note 2 in the Maximum Ratings table. This value governs temperature rise under steady-state power dissipation and must be applied in thermal design calculations.
MMSZ3V0T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ3V0T1 FAQ
1.How can I place an order for MMSZ3V0T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ3V0T1 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 MMSZ3V0T1 reliable?
The price and inventory of MMSZ3V0T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ3V0T1 is usually 5 days.
3.What payment methods are accepted for MMSZ3V0T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ3V0T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ3V0T1?
MMSZ3V0T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ3V0T1 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 MMSZ3V0T1?
For technical support, including MMSZ3V0T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ3V0T1 requirements.
6.How does Aetrix verify that MMSZ3V0T1 is sourced from the original manufacturer or authorized distributors?
All MMSZ3V0T1 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 MMSZ3V0T1 meets industry standards.
7.What is the process for return or replacement of MMSZ3V0T1?
All MMSZ3V0T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ3V0T1, 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 MMSZ3V0T1 part is unused and in its original packaging.
Return procedure for MMSZ3V0T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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