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Chip Carrier Socket 3M 8420-21A1-RK-TP with High Temperature Insulator and Matte Tin Contact Plating

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Chip Carrier Socket 3M 8420-21A1-RK-TP with High Temperature Insulator and Matte Tin Contact Plating

Description : PLCC-20 IC Sockets RoHS

Mfr. Part # : 8420-21A1-RK-TP

Package : PLCC-20

Model Number : 8420-21A1-RK-TP

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Product Overview

The 3M Chip Carrier Sockets Surfacemount 8400 Series are designed to accept chip carriers conforming to JEDEC outlines MO-047 for square and MO-052 for rectangular configurations. These sockets feature a high-temperature insulator compatible with IR reflow and wave soldering processes, and are also compatible with automated loading equipment. The open-top design facilitates unrestricted airflow, while molded slots allow for easy device extraction. Optional PCB locating posts are available. These sockets are RoHS Compliant.

Product Attributes

Brand: 3M
Series: 8400 Series
Insulation Material: Glass Filled Polyphenylene Sulfide (PPS)
Flammability: UL 94V-0
Color: Black
Contact Material: Copper Alloy
Underplating: 50 " [ 1.27 m ] Nickel
Overall Wiping Area Plating: 160 ", [ 4.06 m ] Matte Tin
RoHS Compliance: Yes (RIA E1 and C1 apply)
Moisture Sensitivity Level: 1 (per J-STD-020C)

Technical Specifications

Specification	Value
Contact Resistance	15 m
Insulation Resistance	>10³ M minimum
Capacitance	<1 pF at 1 MHz
Temperature Rating	-40C to +105C
Process Rating	Maximum 260C, single pass (profile per J-STD-020C)

Ordering Information

Note: For Tape and Reel Packaging dimensions, contact 3M customer service or your preferred 3M distributor.

Alignment Feature:

A = With Location Post (tube packaging only)
B = Without Location Post

Packaging:

TP = Tube Pack
TR = Tape and Reel

Contact Quantity	A [mm (Inch)]	B [mm (Inch)]	C [mm (Inch)]	D [mm (Inch)]	E [mm (Inch)]	F [mm (Inch)]	G [mm (Inch)]	H [mm (Inch)]
20	15.65 [0.616]	15.65 [0.616]	5.08 [0.200]	5.08 [0.200]	10.03 [0.395]	10.03 [0.395]	12.70 [0.500]	6.35 [0.250]
28	18.18 [0.716]	18.18 [0.716]	7.62 [0.300]	7.62 [0.300]	12.57 [0.495]	12.57 [0.495]	15.24 [0.600]	7.62 [0.300]
32	18.18 [0.716]	20.75 [0.817]	7.62 [0.300]	10.16 [0.400]	12.57 [0.495]	15.11 [0.595]	17.78 [0.700]	7.62 [0.300]
44	23.28 [0.917]	23.28 [0.917]	12.70 [0.500]	12.70 [0.500]	17.65 [0.695]	17.65 [0.695]	20.32 [0.800]	10.16 [0.400]
52	25.84 [1.017]	25.84 [1.017]	15.24 [0.600]	15.24 [0.600]	20.19 [0.795]	20.19 [0.795]	22.86 [0.900]	11.43 [0.450]
68	30.95 [1.219]	30.95 [1.219]	20.32 [0.800]	20.32 [0.800]	25.27 [0.995]	25.27 [0.995]	27.94 [1.100]	13.97 [0.550]
84	36.00 [1.417]	36.00 [1.417]	25.40 [1.000]	25.40 [1.000]	30.35 [1.195]	30.35 [1.195]	33.02 [1.300]	16.51 [0.650]

Tolerance Unless Noted:

mm	Inch	Tolerance
.0	.00	.3
.000	.00	.20

Important Notice: 3M PLCC products are tin plated on the contact wiping surface. This is necessary to ensure mated reliability since standard PLCC contacts are also tin plated. Tin whiskers are an inherent characteristic of tin, and mechanically stressing the tin is a known driver of whisker growth. It is possible the PLCC and PLCC socket may exhibit tin whisker growth after mating. 3M follows iNEMI plating recommendations, which include whisker mitigating tin plating chemistry to reduce the likelihood of tin whisker growth. Customers should consider whether a PLCC socket is suitable for their particular needs after considering product application lifespan and environment, including mechanical stresses, humidity, and thermal cycling, all of which have been shown to stimulate tin whisker growth.

2410121845_3M-8420-21A1-RK-TP_C5841309.pdf

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