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onsemi MM3Z4V7ST1
- Part No.:
- MM3Z4V7ST1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z4V7ST1.pdf
- Description:
- DIODE ZENER 4.7V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,950
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Product details
Overview
MM3Z4V7ST1 from onsemi is a 4.7 V, ±5% tolerance Zener diode in SOD−323 package with 200 mW power rating, 80 Ω dynamic impedance at 5 mA, and 2.0 μA reverse leakage at 3.0 V. It provides precision voltage regulation for low-power signal conditioning and reference circuits in space-constrained portable electronics.
For engineers reviewing the MM3Z4V7ST1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, dynamic impedance at test current, thermal resistance (635 °C/W), ESD robustness (>16 kV HBM), and Pb-free SOD−323 footprint compatibility.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or supply conditions. Its 4.7 V nominal Zener voltage is specified at 5 mA test current (IZT), with tight ±5% initial tolerance and temperature coefficient of +0.2 mV/°C.
The device exhibits 80 Ω maximum Zener impedance (ZZT) at IZT and 800 Ω maximum impedance at knee current (IZK = 0.5 mA), supporting reliable regulation down to low-current operation. Its 260 pF capacitance at 0 V bias enables use in moderate-frequency noise suppression without compromising signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.55 V to 4.75 V at 5 mA - defines regulated output voltage range under nominal bias |
| Power Dissipation | 200 mW - limits continuous thermal load on FR-5 PCB at 25°C ambient |
| Zener Impedance (ZZT) | 80 Ω max at 5 mA - determines voltage deviation under load transients |
| Reverse Leakage (IR) | 2.0 μA max at 3.0 V - ensures minimal quiescent current in standby mode |
| Capacitance (C) | 260 pF max at 0 V, 1 MHz - constrains high-frequency filtering capability |
| ESD Rating | Class 3 (>16 kV HBM) - supports direct handling in assembly without special precautions |
| Package | SOD−323 (Case 477) - 1.7 mm × 1.25 mm × 0.9 mm surface-mount footprint |
Pinout & Package
SOD−323 package with cathode indicated by polarity band; body dimensions 1.7 mm × 1.25 mm × 0.9 mm; weight 4.507 mg/unit; Pb-free plating option available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection point | Connected to higher-potential node; reverse-biased during regulation |
| 2 (Anode) | Zener cathode connection point | Connected to lower-potential node (typically ground or reference rail) |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener voltage tolerance | ±5% at 5 mA - reduces calibration overhead in precision reference designs |
| Low-profile SOD−323 package | 0.9 mm height - enables routing under adjacent components on dense PCBs |
| High ESD immunity | >16 kV HBM - eliminates need for external ESD protection in handheld interfaces |
| Pb-free compliant construction | Sn-only or Pb−Sn plating - meets RoHS and JEDEC J-STD-020 reflow requirements |
Applications
| Battery Voltage Monitoring | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in wearables to trigger low-battery alerts before cutoff. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 4.7 V threshold for comparator input. Use Value: ±5% VZ tolerance ensures consistent trip point across production units without per-unit trimming. | Use Scenario: Clamping transient surges on USB D+ line during hot-plug events. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to 4.75 V peak during ESD events. Use Value: 260 pF capacitance avoids signal distortion on 480 Mbps USB 2.0 data lines. |
| Low-Power Sensor Biasing | Microcontroller Reset Circuit |
Use Scenario: Providing stable bias voltage to MEMS microphone preamplifier in always-on voice detection. IC Role / Device Role / Timing Role: Low-quiescent-current Zener reference supplying 4.7 V to analog front-end. Use Value: 2.0 μA leakage at 3.0 V minimizes battery drain in multi-year IoT deployments. | Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCU during power-up sequencing. IC Role / Device Role / Timing Role: Shunt regulator holding reset line at known voltage until supply stabilizes. Use Value: 80 Ω dynamic impedance ensures <10 mV droop during 100 μA reset-line sink current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V7,115 | Same 4.7 V nominal, ±5% tolerance, but SOD-323 package with 300 mW rating and 90 Ω ZZT | Higher power margin allows use in 5 mA–10 mA regulation zones where MM3Z4V7ST1 reaches thermal limit | Select when sustained >5 mA Zener current or wider ambient temperature range is required |
| MMSZ4700T1G | 4.7 V nominal, ±5% tolerance, SOD-123 package (2.7 mm × 1.7 mm), 500 mW rating, 150 Ω ZZT | Larger footprint accommodates higher thermal mass but occupies ~2.5× board area of MM3Z4V7ST1 | Select when PCB layout permits larger package and higher power dissipation is needed |
Compared with BZX384-B4V7,115 and MMSZ4700T1G, the MM3Z4V7ST1 offers the smallest footprint and lowest profile among 4.7 V Zeners, making it optimal for ultra-compact designs where board space and component height are constrained, though with lower absolute power handling.
Availability
MM3Z4V7ST1 is available at Aetrix Electronics and suitable for battery management systems, USB interface protection, sensor biasing circuits, and microcontroller reset networks requiring stable component supply and RoHS-compliant sourcing.
Supply support for MM3Z4V7ST1 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 MM3Z series is designed for space-constrained voltage regulation and protection in portable electronics, emphasizing tight tolerance, low profile, and high ESD robustness in miniature SOD−323 packaging.
FAQ
What is the Zener voltage tolerance of MM3Z4V7ST1?
The MM3Z4V7ST1 has a Zener voltage tolerance of ±5% at 5 mA test current, meaning its actual breakdown voltage falls between 4.55 V and 4.75 V under standard conditions. This tight tolerance is confirmed in the Electrical Characteristics table on page 2 of the official datasheet. The MM3Z4V7ST1 is specified for use in precision reference applications where minimal unit-to-unit variation is critical.
Does MM3Z4V7ST1 support Pb-free soldering processes?
Yes, MM3Z4V7ST1 is available in Pb-free configuration (denoted by the "G" suffix in MM3Z4V7ST1G), with Sn-only plating compatible with standard reflow profiles up to 260°C for 10 seconds. The device meets JEDEC J-STD-020 moisture sensitivity level 1 and RoHS Directive 2011/65/EU. MM3Z4V7ST1's Pb-free variant maintains identical electrical performance and thermal characteristics as the leaded version.
What is the maximum reverse leakage current for MM3Z4V7ST1?
The maximum reverse leakage current (IR) for MM3Z4V7ST1 is 2.0 μA at VR = 3.0 V and TA = 25°C, as specified in the Electrical Characteristics table. This low leakage supports ultra-low-power operation in battery-powered devices. The MM3Z4V7ST1 maintains this specification across its full operating temperature range of −65°C to +150°C, with leakage increasing predictably at elevated temperatures.
Can MM3Z4V7ST1 be used in USB 2.0 data line protection?
Yes, MM3Z4V7ST1 is suitable for USB 2.0 D+/D− line clamping due to its 260 pF capacitance at 0 V bias and fast response to transients. Its 4.75 V maximum Zener voltage ensures compliance with USB 2.0 signal swing limits (0–3.6 V), while its >16 kV HBM ESD rating protects against human-body model discharges. MM3Z4V7ST1's low capacitance prevents signal integrity degradation at 480 Mbps data rates.
What is the thermal resistance junction-to-ambient for MM3Z4V7ST1?
The thermal resistance junction-to-ambient (RJA) for MM3Z4V7ST1 is 635 °C/W on FR-5 board at TA = 25°C, as stated in the Maximum Ratings table. This value assumes minimum pad design per note 1. Derating is 1.5 mW/°C above 25°C ambient. For reliable operation at 200 mW, ambient temperature must remain below 125°C - a constraint verified using the MM3Z4V7ST1 derating curve in Figure 6 of the datasheet.
MM3Z4V7ST1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±2%
- Power - Max:
- 200 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
MM3Z4V7ST1 FAQ
1.How can I place an order for MM3Z4V7ST1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z4V7ST1 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 MM3Z4V7ST1 reliable?
The price and inventory of MM3Z4V7ST1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z4V7ST1 is usually 5 days.
3.What payment methods are accepted for MM3Z4V7ST1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z4V7ST1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z4V7ST1?
MM3Z4V7ST1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z4V7ST1 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 MM3Z4V7ST1?
For technical support, including MM3Z4V7ST1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z4V7ST1 requirements.
6.How does Aetrix verify that MM3Z4V7ST1 is sourced from the original manufacturer or authorized distributors?
All MM3Z4V7ST1 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 MM3Z4V7ST1 meets industry standards.
7.What is the process for return or replacement of MM3Z4V7ST1?
All MM3Z4V7ST1 units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z4V7ST1, 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 MM3Z4V7ST1 part is unused and in its original packaging.
Return procedure for MM3Z4V7ST1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z4V7ST1 Tags
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