My Inquiry
My Account
onsemi MMSZ4V7T3
- Part No.:
- MMSZ4V7T3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4V7T3.pdf
- Description:
- DIODE ZENER 4.7V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,387
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSZ4V7T3 from onsemi is a 4.7 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at 75°C, with 80 Ω dynamic impedance at 5 mA and ≤3 µA reverse leakage at 2 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMSZ4V7T3 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, AEC−Q101 qualification status, and direct alternatives for automotive and industrial voltage regulation designs.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable 4.7 V output across load variations by conducting reverse current above its breakdown threshold. It exhibits a temperature coefficient near 0 mV/°C (per Figure 1), enabling minimal drift in bias networks over −55°C to +150°C.
Designed for surface-mount assembly on FR−4/FR−5 boards, it supports automated placement and reflow soldering up to 260°C for 10 seconds. Its 1.60 × 2.69 × 1.16 mm SOD−123 outline enables high-density PCB layouts while meeting UL 94 V−0 flammability and Class 3 ESD (>16 kV HBM) requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.47–4.94 V @ IZT = 5 mA; ensures tight 4.7 V regulation with ±5% tolerance for reference stability |
| Power Dissipation (PD) | 500 mW @ TL = 75°C; derates linearly at 6.7 mW/°C above 75°C for thermal-aware board layout |
| Zener Impedance (ZZT) | 80 Ω max @ IZT = 5 mA, 1 kHz AC signal; limits output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | ≤3 µA @ VR = 2 V; minimizes quiescent current in battery-powered sensing nodes |
| Junction Temp Range | −55°C to +150°C; supports operation in under-hood automotive and industrial control environments |
| ESD Rating | Class 3 (>16 kV) per Human Body Model; withstands handling and board-level ESD events without parameter shift |
Pinout & Package
SOD−123 surface-mount package: 2-lead, cathode-indicated band, dimensions 1.60 × 2.69 × 1.16 mm, void-free thermosetting plastic case with corrosion-resistant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower potential; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive applications including engine control modules and body electronics |
| Pb−Free Construction | RoHS-compliant SOD−123 package with "G" suffix marking and microdot indicator |
| Low Dynamic Impedance | 80 Ω max ensures <10 mV output deviation under 0.5 mA load step changes |
| High ESD Robustness | Class 3 HBM rating eliminates need for external ESD protection in compact sensor interfaces |
Applications
| Automotive Sensor Biasing | Industrial Analog Front-End Protection |
|---|---|
Use Scenario: Providing stable 4.7 V reference for Hall-effect position sensors in transmission control units. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise bias point for sensor Wheatstone bridge excitation. Use Value: Enables <±1% sensor output accuracy over −40°C to +125°C ambient due to low TC and tight VZ tolerance. | Use Scenario: Clamping transient overvoltage on 5 V ADC input lines in programmable logic controllers. IC Role / Device Role / Timing Role: Overvoltage protection element diverting surge energy before damage to downstream precision converters. Use Value: Limits input voltage to ≤4.94 V during EFT bursts, preserving 16-bit ADC linearity without sacrificing bandwidth. |
| Portable Medical Instrument Reference | IoT Node Power Rail Stabilization |
Use Scenario: Generating calibrated reference for analog front-end of handheld pulse oximeters. IC Role / Device Role / Timing Role: Low-leakage Zener reference source for transimpedance amplifier feedback network. Use Value: ≤3 µA leakage prevents signal offset drift in nanoamp-level photodiode current measurement paths. | Use Scenario: Regulating 4.7 V supply rail for BLE SoC RF section in battery-operated asset trackers. IC Role / Device Role / Timing Role: Passive voltage clamp stabilizing LDO output during RF transmit bursts. Use Value: Maintains RF PA bias within 50 mV window during 200 mA peak current pulses, preventing TX frequency drift. |
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-C4V7 | Same 4.7 V ±5%, but SOT−23 package (2.9 × 1.3 × 1.0 mm); 350 mW PD; higher ZZT = 90 Ω | Less thermal margin in high-density layouts; unsuitable for AEC−Q101 automotive use | Select when footprint constraints favor SOT−23 and automotive qualification is not required. |
| MMSZ4703T1G | Identical SOD−123 package, same 4.7 V spec, but 3,000-piece tape-and-reel vs. MMSZ4V7T3's 10,000-piece reel | No functional difference; differs only in packaging quantity and order code suffix | Choose MMSZ4V7T3 for high-volume production requiring optimized reel count and logistics efficiency. |
Compared with BZX84-C4V7, MMSZ4V7T3 offers 43% higher power rating and automotive qualification; versus MMSZ4703T1G, it provides identical performance with larger reel size for reduced changeover frequency in SMT lines.
Availability
MMSZ4V7T3 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog front-end protection, and portable medical instrument reference requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for MMSZ4V7T3 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT markets.
The MMSZxxxT1G Series targets cost-sensitive, space-constrained applications needing reliable, AEC−Q101-qualified Zener regulation in miniature SOD−123 packages.
FAQ
What is the Zener voltage tolerance for MMSZ4V7T3?
The MMSZ4V7T3 has a nominal Zener voltage of 4.7 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 4.47 V and 4.94 V when tested at IZT = 5 mA and TA = 25°C. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet for the MMSZxxxT1G Series.
Is MMSZ4V7T3 qualified for automotive applications?
Yes, MMSZ4V7T3 is AEC−Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. This qualification validates its reliability for automotive use cases such as engine control, body electronics, and ADAS sensor interfaces operating across −55°C to +150°C junction temperatures.
What is the maximum reverse leakage current for MMSZ4V7T3?
The maximum reverse leakage current for MMSZ4V7T3 is 3 µA at VR = 2 V and TA = 25°C, per the Electrical Characteristics table on page 2 of the onsemi datasheet. This low leakage supports precision biasing in ultra-low-power analog circuits like medical sensor front-ends.
Does MMSZ4V7T3 have Pb−Free packaging?
Yes, MMSZ4V7T3 is supplied in a Pb−Free SOD−123 package, indicated by the "G" suffix in its part number and confirmed in the Ordering Information table. The device complies with RoHS Directive 2011/65/EU and features a corrosion-resistant, easily solderable finish.
What is the thermal resistance junction-to-ambient for MMSZ4V7T3?
The thermal resistance junction-to-ambient (RJA) for MMSZ4V7T3 is 340°C/W, measured via infrared scan method on FR−5 board per Note 2 in the Maximum Ratings table. This value guides thermal design when mounting on standard PCBs and determines safe operating area under continuous power conditions.
MMSZ4V7T3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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
MMSZ4V7T3 FAQ
1.How can I place an order for MMSZ4V7T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4V7T3 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 MMSZ4V7T3 reliable?
The price and inventory of MMSZ4V7T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4V7T3 is usually 5 days.
3.What payment methods are accepted for MMSZ4V7T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4V7T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4V7T3?
MMSZ4V7T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4V7T3 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 MMSZ4V7T3?
For technical support, including MMSZ4V7T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4V7T3 requirements.
6.How does Aetrix verify that MMSZ4V7T3 is sourced from the original manufacturer or authorized distributors?
All MMSZ4V7T3 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 MMSZ4V7T3 meets industry standards.
7.What is the process for return or replacement of MMSZ4V7T3?
All MMSZ4V7T3 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4V7T3, 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 MMSZ4V7T3 part is unused and in its original packaging.
Return procedure for MMSZ4V7T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ4V7T3 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…
