MMSZ4686-E3-08 Vishay Zener Diode (Other) In Stock
The MMSZ4686-E3-08 is a surface-mount silicon Zener diode from Vishay with a 3.9 V nominal breakdown voltage in a SOD-123 (2-pin) package. It provides precision voltage clamping and regulation for low-voltage signal protection in consumer and industrial electronics.
- Manufacturer
- Vishay
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- MMSZ4686-E3-08 Datasheet PDF
- Category
- Zener Diode
- Temp Range
- -55.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 3.9 V Zener breakdown voltage in a compact SOD-123 2-pin SMD package for high-density PCB layouts
- Silicon Zener diode construction with low dynamic impedance ensuring tight voltage regulation across the operating current range
- RoHS-compliant (Pb-free, JESD-609 e3) plastic/epoxy package suitable for lead-free reflow soldering processes
Applications
The MMSZ4686-E3-08 is used in voltage clamping networks, bias stabilization circuits, and overvoltage protection stages for microcontroller I/O lines operating at 3.3 V or lower. Its SOD-123 footprint makes it straightforward to place alongside decoupling capacitors in tight PCB layouts for consumer electronics and IoT sensor modules. Industrial signal-conditioning boards also rely on this Zener diode to clamp reference voltage rails and protect sensitive analog input stages from transient spikes.
Specifications
| Pbfree Code | Yes |
| Factory Lead Time | 11Weeks |
| YTEOL | 6.65 |
| Configuration | SINGLE |
| Diode Element Material | SILICON |
| Diode Type | ZENER DIODE |
| JESD-30 Code | R-PDSO-G2 |
| JESD-609 Code | e3 |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Polarity | UNIDIRECTIONAL |
| Power Dissipation-Max | 0.5W |
| Reference Voltage-Nom | 3.9V |
| Surface Mount | YES |
| Technology | ZENER |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 10 |
| Voltage Tol-Max | 5% |
| Working Test Current | 0.05mA |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.50 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the nominal Zener voltage and power dissipation rating of the MMSZ4686-E3-08?
The MMSZ4686-E3-08 has a nominal Zener breakdown voltage of 3.9 V at the test current specified in the datasheet, with a typical power dissipation of 500 mW in the SOD-123 package. This rating is sufficient for signal-level clamping on 3.3 V and 5 V microcontroller I/O lines with typical leakage currents in the microampere range.
How does the SOD-123 package of the MMSZ4686-E3-08 compare to through-hole Zener diodes in terms of board space?
The SOD-123 package measures approximately 2.68 mm x 1.6 mm with a 2-pin footprint, occupying roughly 4.3 mm² of board area versus 15 mm² or more for a DO-35 through-hole equivalent. This compact SMD footprint supports automated pick-and-place assembly and reduces PCB real estate by more than 70% compared to traditional leaded Zener diodes.
In which overvoltage protection topologies is the MMSZ4686-E3-08 typically used?
The MMSZ4686-E3-08 is commonly placed in shunt regulator configurations on 3.3 V reference rails, I2C or SPI bus clamp circuits, and ESD protection networks at analog sensor inputs. Because its 3.9 V breakdown is close to the 3.3 V logic level, it begins conducting within a few hundred millivolts of the normal supply, providing fast clamping response in less than 1 nanosecond for transient events.
Is the MMSZ4686-E3-08 RoHS compliant, and what reflow soldering profile is compatible with the SOD-123 package?
Yes, the MMSZ4686-E3-08 is JESD-609 e3 Pb-free and fully RoHS compliant. The plastic/epoxy SOD-123 package supports standard lead-free reflow profiles with a peak temperature of 260 °C for up to 30 seconds, consistent with IPC/JEDEC J-STD-020 MSL 1 or MSL 3 rated small-signal SMD components.
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