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MM3Z4V7
Diotec Semiconductor
ZENER SOD323F 4.7V 0.3W 5%
33113 Pcs New Original In Stock
Zener Diode 4.7 V 300 mW ±5% Surface Mount SOD-323
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5.0 / 5.0
- (163 Ratings)
MM3Z4V7
Product Overview
12944026
DiGi Electronics Part Number
MM3Z4V7-DGManufacturer
Diotec Semiconductor
MM3Z4V7
Description
ZENER SOD323F 4.7V 0.3W 5%Inventory
33113 Pcs New Original In Stock
Zener Diode 4.7 V 300 mW ±5% Surface Mount SOD-323
Quantity
Minimum 1
Minimum 1
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MM3Z4V7 Technical Specifications
Category
Diodes, Zener, Single Zener Diodes
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Voltage - Zener (Nom) (Vz)
4.7 V
Tolerance
±5%
Power - Max
300 mW
Impedance (Max) (Zzt)
80 Ohms
Current - Reverse Leakage @ Vr
2 µA @ 1 V
Voltage - Forward (Vf) (Max) @ If
1 V @ 10 mA
Operating Temperature
-50°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
SC-90, SOD-323F
Supplier Device Package
SOD-323
Datasheet & Documents
Datasheets
Download MM3Z4V7 Product Specification (PDF)
HTML Datasheet
MM3Z4V7-DG
Environmental & Export Classification
RoHS Status
Not applicable
Moisture Sensitivity Level (MSL)
Not Applicable
REACH Status
Vendor Undefined
ECCN
EAR99
HTSUS
8541.10.0000
Additional Information
Other Names
2796-MM3Z4V7TR
Standard Package
3,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
디지 일렉트로닉스는 가격이 착하고, 서비스도 아주 만족스럽습니다.
Dec 02, 2025
디지 일렉트로닉스는 고객 만족을 위해 최선을 다하는 회사입니다. 배송도 빠르고 반응도 빠릅니다.
Dec 02, 2025
包裝的用心讓我印象深刻，每個商品都包裝得嚴密，沒有任何破損的跡象。
Dec 02, 2025
Leur communication claire et directe facilite grandement notre collaboration.
Dec 02, 2025
Support staff respond patiently and professionally, making after-sales issues much easier to handle.
Dec 02, 2025
I am always satisfied with the reliability and price of DiGi Electronics’ products.
Dec 02, 2025
DiGi Electronics’ quick response times help me resolve unexpected issues efficiently.
Dec 02, 2025
Prompt delivery and immediate support response made my experience very satisfying.
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Frequently Asked Questions (FAQ)
How does the MM3Z4V7 Zener diode's dynamic impedance affect voltage regulation stability in low-current biasing circuits?
The MM3Z4V7 has a maximum impedance (Zzt) of 80 Ohms, which can cause noticeable output voltage variation under fluctuating load conditions, especially at currents below 5mA. In low-power applications such as sensor biasing or reference circuits, this impedance may introduce regulation errors due to insufficient stabilization. To mitigate this, ensure the operating current through the MM3Z4V7 is maintained above 10mA using a suitable series resistor, or consider pairing it with a buffer amplifier to isolate load variations. For ultra-stable references, evaluate low-impedance alternatives like the TL431, though the MM3Z4V7 remains a cost-effective choice for moderate precision with proper design margins.
What thermal derating considerations should be applied when using the MM3Z4V7 in a sealed industrial enclosure near 100°C ambient?
The MM3Z4V7 is rated for 300mW maximum power at 25°C, but its power dissipation must be derated linearly above this temperature. In a sealed enclosure operating at 100°C ambient, the allowable power drops significantly—typically around 120mW depending on PCB layout and airflow. This means even a modest 4.7V × 15mA load exceeds thermal limits. Use wide copper traces for heat dissipation and limit average current to 8–10mA. Monitor junction temperature using TJ = TA + (P × RθJA), and consider the SMA variant (e.g., MMBZ4V7) for better thermal performance if sustained high power is needed.
Can the MM3Z4V7 replace the BZX84-C4V7 in a SOT-23 circuit without adjusting the PCB layout or biasing network?
While the MM3Z4V7 and BZX84-C4V7 share a similar 4.7V nominal Zener voltage and ±5% tolerance, the MM3Z4V7 is housed in an SOD-323F (SC-90) package, which is smaller than the BZX84-C4V7’s SOT-23 (SOT-23-3) footprint. A direct replacement without PCB modification will result in poor solder joints or misalignment. Only proceed if your design uses footprint-compatible pads or you rework the board. Electrically, both have comparable leakage and impedance, so if mechanical fit is resolved, the MM3Z4V7 can serve as a functional substitute with identical biasing.
How does the MM3Z4V7 perform in ESD protection roles compared to dedicated TVS diodes like the SMBJ4.7A?
The MM3Z4V7 can provide minor transient suppression due to its Zener action, but it is not designed as a transient voltage suppressor (TVS). While it handles continuous 300mW, it lacks the surge current rating (e.g., 30A peak pulse) of dedicated devices like the SMBJ4.7A. Using MM3Z4V7 for ESD clamping in USB or HDMI lines risks early degradation or failure under repeated ESD events (e.g., IEC 61000-4-2). For robust protection, use MM3Z4V7 only in conjunction with a series resistor for minor overvoltage, and pair it with a proper TVS diode for line-level ESD. Never rely on it as the primary protection element in high-exposure environments.
What are the long-term reliability risks of using the MM3Z4V7 in a high-humidity automotive under-hood application?
The MM3Z4V7’s SOD-323 package lacks hermetic sealing, making it susceptible to moisture ingress under high humidity and thermal cycling—common under-hood conditions. Prolonged exposure can increase leakage current or cause parametric drift, especially near its 150°C TJ limit. Although RoHS status is listed as not applicable, verify conformal coating is applied during PCB assembly to prevent electrochemical migration. For automotive-grade reliability, consider AEC-Q101 qualified alternatives like the SZMM3Z4V7T1G (ON Semiconductor), which offers identical specs but validated stress testing. If using the standard MM3Z4V7, implement rigorous environmental qualification testing to avoid field failures.
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MM3Z4V7 CAD Models
Diotec Semiconductor MM3Z4V7 PCB symbols & footprints
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