Excavator Spare Parts

161-3128 24V 5-Pin Micro Relay for Cat 320D, 336F and 345C

Name: 161-3128 24V 5-Pin Micro Relay for Cat 320D, 336F and 345C
Brand: EexcavaStart
SKU: 161-3128

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OEM / reference161-3128

Specification24V 5-Pin Micro Relay

Catalog ID79449009

161-3128 is an environmentally sealed 24V, five-pin plug-in micro relay for switching electrical components in heavy-duty equipment. The official Cat record lists 320D, 336F and 345C excavators among many compatible machines. Confirm the complete number, voltage, pin layout, socket and machine serial range before ordering.

Product Type: Plug-in micro relay
Voltage: 24V
Pins: 5
Protection: Environmentally sealed
Material: Carbon steel and alloy copper
Condition: New replacement part

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Part-number relationships

Relationship	Reference family	Number
Primary Equipment Part Number	Official Cat parts reference	161-3128

Product fitment guide

Part numbers and compatible models

Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.

Part identification

Reference numbers

Primary number

161-3128

Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.

Product summary

24V 5-Pin Micro Relay

Category: Excavator Spare Parts
Catalog ID: 79449009
Photo views: 6

Before ordering

Confirm these details

Match the complete part number on the original component.
Compare connectors, mounting points and visible dimensions with the product photos.
Confirm the exact machine or engine model and serial range before ordering.

Machine fitment

Compatible model references

4 model references

Function: Switches electrical components on or off
Excavator Examples: Cat 320D / 336F / 345C
Additional Published Equipment: Cat wheeled excavators, compact excavators, loaders, graders and pavers
Fitment Limitation: Confirm 161-3128, 24V rating, five-pin socket and machine serial range

Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.

Quick fitment answers

Common questions about 161-3128

Which machines use 161-3128?

Recorded compatible model references include Function: Switches electrical components on or off, Excavator Examples: Cat 320D / 336F / 345C, Additional Published Equipment: Cat wheeled excavators, compact excavators, loaders, graders and pavers, Fitment Limitation: Confirm 161-3128, 24V rating, five-pin socket and machine serial range. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 161-3128?

No alternate number is listed for 161-3128. Send the original nameplate for an alternate-number check.

How do I confirm 161-3128 before ordering?

Match the complete part number on the original component. Compare connectors, mounting points and visible dimensions with the product photos. Confirm the exact machine or engine model and serial range before ordering. Send clear photos of the original unit and connector layout when requesting a quote.

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