Surfacemount Chip Carrier Socket 3M 8428-21B1-RK-TP with Molded Slots and Optional PCB Locating Posts
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 devices. These sockets feature a high-temperature insulator compatible with IR reflow and wave soldering processes, 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, and the product is 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
- Certifications: RoHS Compliant (RIA E1 and C1 apply)
- Moisture Sensitivity Level: 1 (per J-STD-020C)
- Packaging Options: Tube Pack (TP), Tape and Reel (TR)
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) |
Model Dimensions (mm [Inch])
| Contact Quantity | A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|---|
| 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] |
Note on Dimensions: [ ] Dimensions for Reference Only. Tolerance Unless Noted: .3 mm, .20 [ ].
Alignment Feature: A = With Location Post (tube packaging only), B = Without Location Post.
Important Notice: 3M PLCC products have tin-plated contact wiping surfaces. Tin whiskers are an inherent characteristic of tin, and mechanical stress can promote whisker growth. 3M follows iNEMI plating recommendations with whisker-mitigating tin plating chemistry. Users should evaluate the suitability of PLCC sockets for their specific applications, considering lifespan, environment, mechanical stresses, humidity, and thermal cycling.
2410121845_3M-8428-21B1-RK-TP_C3170889.pdf
