MMSZ4686-E3-08 Vishay Zener Diode (Other) In Stock

Name: MMSZ4686-E3-08
Brand: Vishay
SKU: MMSZ4686-E3-08
Availability: InStock

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.

ACTIVEZener DiodeVerified Jun 2026

Package / Visual Reference

MMSZ4686-E3-08Other

Quick Facts

Manufacturer: Vishay
Package: Other
Pin Count: 2
Lifecycle: ACTIVE
Datasheet: MMSZ4686-E3-08 Datasheet PDF
Category: Zener Diode
Price: From $0.0328(MOQ 100)
Temp Range: -55.0°C to 150.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of MMSZ4686-E3-08?

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

What is MMSZ4686-E3-08 used for?

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.

What are the specifications of MMSZ4686-E3-08?

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

Where can I find the MMSZ4686-E3-08 datasheet?

MMSZ4686-E3-08 Datasheet Download

Official datasheet from Vishay

What are equivalent replacements for MMSZ4686-E3-08?

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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Reference Price (USD)

From $0.0328

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
100+	$0.2142	$21.42
500+	$0.1608	$80.42
1000+	$0.1436	$143.59
6000+	$0.1250	$750.00
9000+	$0.1090	$981.00
12000+	$0.0328	$393.60

pcs

Unit price: $0.2142 · Total: $21.42

In Stock · 24h Response · Worldwide Shipping

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Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

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