How do the 3M 4521 Series variants differ?

3M 4521 Series part numbers differ by contact finish thickness - mating, contact finish thickness - post, fastening type and features. Use the selection guide above to pick by contact finish thickness - mating.

How many 3M 4521 Series part numbers are listed?

11 3M 4521 Series part numbers are listed, each with specifications and a datasheet where available.

3M 4521 Series

11 variants · 3M

About the 3M 4521 Series

The 3M 4521 Series series groups 11 related part numbers, each listed with full specifications, a datasheet where available, and an RFQ option. Every variant in the range shares a common connector type of Header, contact finish - mating of Gold and contact finish - post of Tin. Variants differ by contact finish thickness - mating, contact finish thickness - post and fastening type, so you can match the exact contact finish thickness - mating your application requires using the selection guide below. All listed 3M 4521 Series part numbers are active and orderable.

Select a variant by

Contact finish thickness - mating: 30.0µin (0.76µm) · Flash
Contact finish thickness - post: 100.0µin (2.54µm) · 200.0µin (5.08µm)
Fastening type: Latch Lock/Eject Hooks, Short · Push-Pull
Features: Keying Slot · Keying Slot, Pick and Place
Insulation height: 0.210\" (5.33mm) · 0.222\" (5.65mm)
Mounting type: Surface Mount · Through Hole · Through Hole, Right Angle
Package: Tape & Reel (TR); Cut Tape (CT) · Tray
Positions: 10 · 12 · 14 · 16

Shared specifications

Connector type: Header
Contact finish - mating: Gold
Contact finish - post: Tin
Contact material: Copper Alloy
Contact shape: Square
Current rating: 1A
Gender: Male Pin
Insulation material: Liquid Crystal Polymer (LCP)
Material flammability rating: UL94 V-0
Operating temperature: -65°C ~ 125°C
Pitch: 0.050\" (1.27mm)
Row spacing - mating: 0.050\" (1.27mm)

Variant comparison

Parameter	45210-200230	45210-500200	45210-600230	45212-220230	45212-520230	45212-600230
Contact finish thickness - mating	30.0µin (0.76µm)	Flash	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)
Contact finish thickness - post	200.0µin (5.08µm)	100.0µin (2.54µm)	200.0µin (5.08µm)	200.0µin (5.08µm)	200.0µin (5.08µm)	200.0µin (5.08µm)
Fastening type	Push-Pull	Push-Pull	Push-Pull	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short	Push-Pull
Features	Keying Slot, Pick and Place	Keying Slot	Keying Slot	Keying Slot, Pick and Place	Keying Slot	Keying Slot
Insulation height	0.222\" (5.65mm)	0.210\" (5.33mm)	0.222\" (5.65mm)	0.222\" (5.65mm)	0.210\" (5.33mm)	0.222\" (5.65mm)
Mounting type	Surface Mount	Through Hole, Right Angle	Through Hole	Surface Mount	Through Hole, Right Angle	Through Hole
Package	Tape & Reel (TR); Cut Tape (CT)	Tray	Tray	Tape & Reel (TR); Cut Tape (CT)	Tray	Tray
Positions	10	10	10	12	12	12

Request a quote on any 3M 4521 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 3M 4521 Series variants differ?: 3M 4521 Series part numbers differ by contact finish thickness - mating, contact finish thickness - post, fastening type and features. Use the selection guide above to pick by contact finish thickness - mating.
How many 3M 4521 Series part numbers are listed?: 11 3M 4521 Series part numbers are listed, each with specifications and a datasheet where available.
How do I get pricing and lead time for 3M 4521 Series?: Request a quote (RFQ) for any 3M 4521 Series part number and we confirm price, availability and lead time per line — including end-of-life and hard-to-find variants.