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Molex 3878 Series

15 variants · Molex

About the Molex 3878 Series

The Molex 3878 Series series groups 15 related part numbers, each listed with full specifications, a datasheet where available, and an RFQ option. Every variant in the range shares a common barrier type of 2 Wall (Dual), bottom termination of Closed and color of Black. Variants differ by number of circuits, number of wire entries and package, so you can match the exact number of circuits your application requires using the selection guide below. All listed Molex 3878 Series part numbers are active and orderable.

Select a variant by

Number of circuits
2 · 4 · 5 · 6 · 7 · 8 · 9 · 12 · 14 · 16
Number of wire entries
4 · 8 · 10 · 12 · 14 · 16 · 18 · 24 · 28 · 32
Package
Bulk · Tray
Terminal screw finish
Nickel · Zinc, Clear Chromate
Terminal screw material
Brass · Steel
Top termination
Screws · Screws with Captive Plate

Shared specifications

Barrier type
2 Wall (Dual)
Bottom termination
Closed
Color
Black
Current rating
15A
Features
Flange
Material - insulation
Thermoplastic
Material flammability rating
UL94 V-0
Mounting type
Chassis, Panel
Pitch
0.438\" (11.12mm)
Rows
2
Terminal block type
Barrier Block
Voltage rating
300V

Variant comparison

Parameter387800102387800104387800105387800106387800107387800109
Number of circuits245679
Number of wire entries4810121418
PackageBulkBulkBulkBulkBulkBulk
Terminal screw finishZinc, Clear ChromateZinc, Clear ChromateZinc, Clear ChromateZinc, Clear ChromateZinc, Clear ChromateZinc, Clear Chromate
Terminal screw materialSteelSteelSteelSteelSteelSteel
Top terminationScrewsScrewsScrewsScrewsScrewsScrews

Request a quote on any Molex 3878 Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.

Frequently asked questions

How do the Molex 3878 Series variants differ?
Molex 3878 Series part numbers differ by number of circuits, number of wire entries, package and terminal screw finish. Use the selection guide above to pick by number of circuits.
How many Molex 3878 Series part numbers are listed?
15 Molex 3878 Series part numbers are listed, each with specifications and a datasheet where available.
How do I get pricing and lead time for Molex 3878 Series?
Request a quote (RFQ) for any Molex 3878 Series part number and we confirm price, availability and lead time per line — including end-of-life and hard-to-find variants.

All variants