Chip Carrier Socket 3M 8420-21B1-RK-TP Surface Mount 8400 Series with High Temperature Insulator and RoHS Compliance
Product Overview
The 3M Chip Carrier Sockets Surfacemount 8400 Series are designed to accept chip carriers conforming to JEDEC outline MO-047 for square and MO-052 for rectangular configurations. These sockets feature a high-temperature insulator compatible with IR reflow and wave soldering, and are designed for automated loading equipment. The open-top design ensures unrestricted airflow, while molded slots facilitate 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
- Moisture Sensitivity Level: 1 (per J-STD-020C)
- Certifications: RoHS Compliant (RIA E1 and C1 apply)
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 on Tin Plating: 3M PLCC products are tin plated on the contact wiping surface. This is necessary for mated reliability, as standard PLCC contacts are also tin plated. Tin whiskers are an inherent characteristic of tin, and mechanical stress can drive whisker growth. It is possible for the PLCC and PLCC socket to exhibit tin whisker growth after mating. 3M follows iNEMI plating recommendations using whisker-mitigating tin plating chemistry to reduce the likelihood of growth. Users should consider the suitability of a PLCC socket for their specific application, taking into account product lifespan, environment, mechanical stresses, humidity, and thermal cycling.
| 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] |
| Alignment Feature | Packaging |
|---|---|
| A = With Location Post (tube packaging only) | TP = Tube Pack |
| B = Without Location Post | TR = Tape and Reel (contact 3M customer service or distributor for dimensions) |
Tolerance: Unless Noted: .3 mm, .20 [Inch], .000 [Inch]
Contact Information: For technical, sales or ordering information call 800-225-5373 or visit www.3Mconnector.com.
2410121845_3M-8420-21B1-RK-TP_C5355988.pdf
