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Microchip Technology 1N6118US — Circuit Protection

1N6118US Zener TVS, 500W, Bidirectional, SQ-MELF, Active

MPN1N6118US
Active

Microchip Technology 1N6118US, Zener TVS Diode, 500W Peak Pulse Power, 25.1V Reverse Standoff, Bidirectional, SQ-MELF Surface Mount, -55°C to 175°C

$15.2400Ref. price · indicative, final on quote
Microchip Technology 1N6118US datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1N6118US specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown29.83V
Voltage - clamping (Max) @ ipp47.99V
Voltage - reverse standoff25.1V
Current - peak pulse (10/1000μs)10.36A
Power - peak pulse500W
Power line protectionNo
Operating temperature-55°C~175°C(TJ)
PackageBulk
ApplicationsGeneral Purpose
CaseSQ-MELF, B
Bidirectional channels1

Product details

Zener TVS for 24V Rail Protection

Bidirectional Clamping for Polarity-Agnostic Protection

Single bidirectional channel means the same device clamps surges of either polarity, simplifying BOM layout and reducing part count on AC-coupled or floating signal lines. The 29.83V minimum breakdown voltage ensures the TVS does not conduct during normal 24V operation, yet triggers well before the downstream circuitry sees damaging overvoltage.

The SQ-MELF (B, MELF-style) surface-mount package is widely available through distribution.

Frequently asked questions

Can I use 1N6118US for 24V system protection?

Yes. The 25.1V reverse standoff voltage sits comfortably above a nominal 24V rail, and the 29.83V minimum breakdown ensures no leakage during normal operation. The 500W peak pulse rating handles typical industrial surge events per IEC 61000-4-5.

What is the closest pin-compatible alternative to 1N6118US?

Within the same Microchip 1N6118 family, the 1N6118 (through-hole DO-13 variant) shares identical electrical ratings but differs in package. For a surface-mount alternative, devices from the 1N6118US series with different voltage grades (e.g., 1N6118US for 25.1V standoff) are direct pin-compatible in the same SQ-MELF footprint.