My Inquiry
My Account
onsemi MM5Z4V3ST1G
- Part No.:
- MM5Z4V3ST1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z4V3ST1G.pdf
- Description:
- DIODE ZENER 4.3V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,087
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MM5Z4V3ST1G from onsemi is a 4.3 V ±3% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 90 Ω maximum Zener impedance at 5 mA test current and 1.0 µA reverse leakage at 3.0 V. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rail clamping and USB interface overvoltage protection.
For engineers reviewing the MM5Z4V3ST1G datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 4.17–4.43 V Zener voltage window, 16 kV HBM ESD rating, SOD-523 footprint compatibility, and automotive-grade AEC-Q101 qualification when ordered as SZ variant.
Technical Context
This device operates as a two-terminal voltage reference and transient clamp, leveraging silicon PN junction avalanche breakdown. Its thermal resistance of 250 °C/W (Junction-to-Ambient) and 4.0 mW/°C derating above 25 °C define safe operating limits on FR-4 PCBs with 1 cm² copper pad.
The MM5Z4V3ST1G exhibits a temperature coefficient of −3.5 mV/°C at 5 mA, enabling predictable drift compensation in bias networks. Its 450 pF capacitance at 0 V and 1 MHz supports high-frequency noise suppression without compromising signal integrity in RF front-end protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.17–4.43 V at 5 mA - defines precise clamping threshold for 3.3 V and 5 V rail protection |
| Power Rating (PD) | 500 mW at 25 °C - supports sustained energy absorption in compact layouts |
| Zener Impedance (ZZT) | ≤90 Ω at IZT = 5 mA - ensures low dynamic impedance for stable regulation under load transients |
| Reverse Leakage (IR) | ≤1.0 µA at VR = 3.0 V - minimizes standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for direct user-interface protection |
| Package | SOD-523 (1.20 × 0.80 × 0.70 mm) - enables placement in <1.0 mm² board area for ultra-dense PCBs |
Pinout & Package
SOD-523 surface-mount package with cathode marked by polarity band; body dimensions 1.20 mm × 0.80 mm × 0.70 mm; lead finish 100% matte tin; MSL 1 compliant; reflow capable up to 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±3% (4.17–4.43 V) - eliminates need for post-production trimming in 3.3 V system rails |
| Low-profile packaging | 0.7 mm height - allows stacking under shields or beneath connectors in slim mobile designs |
| High ESD robustness | 16 kV HBM - protects USB, SIM, and SD card interfaces without external TVS cascading |
| Pb-free & RoHS compliance | 100% matte Sn finish - satisfies IPC-J-STD-020 moisture sensitivity and lead-free assembly requirements |
Applications
| Smartphone Power Rail Clamping | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Clamp transient spikes on PMIC output rails during hot-plug or load dump events in LTE/5G handsets. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing fast (<1 ns response) voltage limiting at 4.3 V threshold. Use Value: Prevents latch-up in 3.3 V LDOs and baseband processors by holding rail voltage within ±5% of nominal during 100 ns surges. | Use Scenario: Protect differential D+/D− lines from ESD strikes during cable insertion in OTG-enabled devices. IC Role / Device Role / Timing Role: Bidirectional clamping diode placed between data line and ground, leveraging symmetric Zener behavior below forward threshold. Use Value: Maintains signal integrity up to 480 Mbps by limiting line-to-ground excursion to ≤0.9 V forward drop and ≤4.43 V reverse breakdown. |
| IoT Sensor Node Reference | Automotive Body Control Module (BCM) Input Conditioning |
Use Scenario: Stabilize ADC reference voltage for analog sensor outputs in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Low-current Zener reference supplying 5 µA bias to op-amp input stage in ratiometric measurement circuits. Use Value: Delivers <±0.5% drift over −40 to +85 °C due to matched TC and low ZZT, improving 12-bit ADC accuracy by ≥1 LSB. | Use Scenario: Condition 12 V switch inputs (e.g., door lock actuator feedback) before MCU GPIO sampling in Class A BCM modules. IC Role / Device Role / Timing Role: Overvoltage protector placed between pull-up resistor and microcontroller input pin. Use Value: Survives load-dump pulses per ISO 7637-2 Pulse 5a (120 V/100 ms) when paired with series resistor, preventing GPIO damage without active circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C4V3 | 4.3 V ±5%, 300 mW rating, SOD-323 package (1.7 × 1.3 × 0.9 mm) | Larger footprint; lower power handling; identical voltage range but looser tolerance | Select when board space permits larger package and ±5% regulation suffices |
| MMSZ4V3ET1G | 4.3 V ±5%, 500 mW, SOD-123 package (3.7 × 1.6 × 1.1 mm); no AEC-Q101 option | 3× larger area; lacks automotive qualification; higher thermal resistance (300 °C/W) | Choose for cost-sensitive industrial designs where AEC-Q101 is not required |
Compared with BZX584C4V3 and MMSZ4V3ET1G, the MM5Z4V3ST1G delivers tighter voltage control (±3% vs. ±5%), smaller footprint (SOD-523), and automotive qualification path via SZ prefix-making it optimal for next-gen portable and automotive edge nodes where size, precision, and reliability are co-constrained.
Availability
MM5Z4V3ST1G is available at Aetrix Electronics and suitable for smartphone power management, USB interface protection, and IoT sensor reference applications requiring stable component supply across high-mix, low-volume production runs.
Supply support for MM5Z4V3ST1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM5ZxxxST1G series targets space-constrained, high-reliability voltage regulation-designed specifically for portable electronics, wearables, and automotive subsystems needing precision Zener clamping in sub-1 mm² footprints.
FAQ
What is the Zener voltage tolerance of MM5Z4V3ST1G?
The MM5Z4V3ST1G has a guaranteed Zener voltage range of 4.17 V to 4.43 V at 5 mA test current, corresponding to ±3% tolerance around the nominal 4.3 V rating. This tight tolerance is confirmed in the Electrical Characteristics table on page 2 of the onsemi datasheet and enables direct use in 3.3 V rail protection without calibration. The MM5Z4V3ST1G achieves this via process-controlled doping and laser trimming during wafer sort.
Does MM5Z4V3ST1G support automotive applications?
The MM5Z4V3ST1G itself is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMM5Z4V3ST1G is fully qualified and PPAP-capable. Both share identical electrical specs and SOD-523 packaging, differing only in traceability, lot control, and qualification documentation. For non-automotive designs, MM5Z4V3ST1G remains suitable; for automotive Tier 1 programs, the SZ prefix version must be specified.
What is the maximum power dissipation for MM5Z4V3ST1G at 85 °C ambient?
At 85 °C ambient, the MM5Z4V3ST1G's maximum power dissipation is 260 mW. This is calculated using the 4.0 mW/°C derating factor from the datasheet: 500 mW − (85 − 25) × 4.0 = 260 mW. Operation above this limit risks exceeding the 150 °C max junction temperature and accelerated parametric shift. The MM5Z4V3ST1G's thermal resistance of 250 °C/W assumes a 1 cm² FR-4 copper pad.
How is polarity identified on the MM5Z4V3ST1G SOD-523 package?
The MM5Z4V3ST1G uses a cathode band (dark stripe) on the SOD-523 body to identify Pin 1 (cathode); Pin 2 (anode) is the unmarked end. This marking aligns with the generic SOD-523 marking diagram in the datasheet (page 4), and the device marking "T8" appears adjacent to the band. Correct orientation is critical-reversing the MM5Z4V3ST1G will result in forward conduction instead of Zener regulation.
What is the reverse leakage current specification for MM5Z4V3ST1G at 3.0 V?
The MM5Z4V3ST1G specifies a maximum reverse leakage current (IR) of 1.0 µA at VR = 3.0 V and TA = 25 °C, per the Electrical Characteristics table. This low leakage ensures minimal quiescent current draw in always-on sensor nodes and battery-backed systems. At elevated temperatures, leakage increases exponentially-e.g., ~5 µA at 85 °C-so system-level validation is recommended for extended temperature operation of MM5Z4V3ST1G.
MM5Z4V3ST1G 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):
- 4.3 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 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
MM5Z4V3ST1G FAQ
1.How can I place an order for MM5Z4V3ST1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z4V3ST1G 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 MM5Z4V3ST1G reliable?
The price and inventory of MM5Z4V3ST1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z4V3ST1G is usually 5 days.
3.What payment methods are accepted for MM5Z4V3ST1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z4V3ST1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z4V3ST1G?
MM5Z4V3ST1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z4V3ST1G 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 MM5Z4V3ST1G?
For technical support, including MM5Z4V3ST1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z4V3ST1G requirements.
6.How does Aetrix verify that MM5Z4V3ST1G is sourced from the original manufacturer or authorized distributors?
All MM5Z4V3ST1G 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 MM5Z4V3ST1G meets industry standards.
7.What is the process for return or replacement of MM5Z4V3ST1G?
All MM5Z4V3ST1G units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z4V3ST1G, 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 MM5Z4V3ST1G part is unused and in its original packaging.
Return procedure for MM5Z4V3ST1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z4V3ST1G 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…
