SFM-121-02-L-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-121-02-L-D-A-K is a high-reliability 42-position dual-row surface-mount socket strip on 0.050-inch (1.27 mm) pitch with gold-over-nickel contacts and beryllium copper spring for consistent mating. Polarized housing prevents incorrect insertion, ensuring reliable signal integrity. Available from authorized distributors with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- SFM-121-02-L-D-A-K Datasheet PDF
- Category
- Connector
- Price
- From $3.1000(MOQ 500)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-121-02-L-D-A-K?
- 42-position dual-row socket strip on 0.050-inch (1.27 mm) pitch enabling high-density board-to-board interconnects
- Gold (10 microinch) over nickel (50 microinch) mating contact finish provides low contact resistance and long mating cycle life
- Beryllium copper contact material ensures consistent spring force and reliable electrical connection across thousands of mating cycles
- Polarized housing prevents incorrect mating orientation, reducing assembly errors in dense PCB environments
What is SFM-121-02-L-D-A-K used for?
The SFM-121-02-L-D-A-K is designed for high-reliability board-to-board and mezzanine socket applications in telecommunications, defense electronics, and industrial computing systems. Its 42-position dual-row layout on 0.050-inch pitch supports high channel-count signal routing while minimizing PCB footprint. The gold-plated beryllium copper contacts make it suitable for high-cycle interfaces such as test fixture sockets and removable module connectors.
What are the specifications of SFM-121-02-L-D-A-K?
| YTEOL | 9.4 |
| Additional Feature | POLARIZED |
| Body/Shell Style | SOCKET |
| Connector Type | BOARD CONNECTOR |
| Contact Finish Mating | GOLD (10) OVER NICKEL (50) |
| Contact Finish Termination | Matte Tin (Sn) - with Nickel (Ni) barrier |
| Contact Gender | FEMALE |
| Contact Material | BERYLLIUM COPPER |
| DIN Conformance | NO |
| Filter Feature | NO |
| IEC Conformance | NO |
| JESD-609 Code | e3 |
| MIL Conformance | NO |
| Mixed Contacts | NO |
| Mounting Style | STRAIGHT |
| Mounting Type | BOARD |
| Number Of Connectors | ONE |
| Number of Rows Loaded | 2 |
| Option | GENERAL PURPOSE |
| Rated Current (Signal) | 3.2A |
| Terminal Pitch | 1.27mm |
| Termination Type | SURFACE MOUNT |
| Total Number of Contacts | 42 |
| UL Flammability Code | 94V-0 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.69.40.40 |
| Country of Origin | USA |
Where can I find the SFM-121-02-L-D-A-K datasheet?
SFM-121-02-L-D-A-K Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-121-02-L-D-A-K?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What contact material and plating does the SFM-121-02-L-D-A-K use for reliable mating?
The SFM-121-02-L-D-A-K uses beryllium copper contacts plated with gold (10 microinch) over nickel (50 microinch) at the mating interface. Beryllium copper provides excellent spring resilience, maintaining consistent contact force over thousands of mating cycles, while the gold finish ensures low and stable contact resistance even in humid or mildly corrosive environments.
How does the polarization feature of the SFM-121-02-L-D-A-K prevent assembly errors?
The SFM-121-02-L-D-A-K includes a polarized housing that physically keys the socket to allow mating in only one orientation. This prevents reversed insertion of the 42-position dual-row connector during PCB assembly or field replacement, eliminating the risk of applying signals to incorrect pins, which could damage components operating at 3.3 V or 5 V signal levels.
For a mezzanine PCB design requiring 42 signals on a 0.050-inch pitch, how does the SFM-121-02-L-D-A-K compare to a through-hole socket?
The SFM-121-02-L-D-A-K's surface-mount termination eliminates the need for drilled through-holes, reducing PCB layer count requirements and saving board space. At 0.050-inch pitch, the 42-position SMT socket occupies roughly half the board footprint of an equivalent 0.100-inch through-hole socket, enabling higher routing density on adjacent PCB layers.
Which procurement channels offer the SFM-121-02-L-D-A-K and what lead times should engineers plan for?
The SFM-121-02-L-D-A-K is available through SAMTEC's authorized global distribution network, including major electronics distributors. Standard stock availability supports same-day or next-day shipping for small quantities, while larger production volumes may require 4 to 8 weeks lead time. Engineers should verify the current stock level and pricing, which typically ranges from a few dollars per unit for small quantities down to below one dollar per unit at high volumes.
Related Guides
STM32H753VIT6 High-Performance MCU Design Guide
Practical STM32H753VIT6 design guidance for power, clocks, memory, DMA, PCB layout, bring-up, and production recovery.
Aug 3, 2026
STM32H753ZIT6 Selection Guide for High-Performance Embedded Systems
Select the STM32H753ZIT6 by evaluating compute, memory, LQFP144 pinout, power, interfaces, security, and sourcing requirements.
Aug 3, 2026
ICL7660ACPAZ Negative Voltage Charge Pump Design Guide
Design a reliable ICL7660ACPAZ negative rail with capacitor equations, layout rules, startup checks, and practical troubleshooting.
Aug 2, 2026
C0402C103K3RACTU 10 nF MLCC Design Guide
Practical guidance for applying the C0402C103K3RACTU 10 nF, 25 V X7R MLCC in decoupling, filtering, timing, and EMI-control networks.
Aug 2, 2026
Why Buy from FindMyChip
About SAMTEC
SAMTEC is a leading electronic component manufacturer. FindMyChip sources SAMTEC ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 500+ | $4.0090 | $2004.50 |
| 1000+ | $3.5200 | $3520.00 |
| 2000+ | $3.2490 | $6498.00 |
| 2500+ | $3.1400 | $7850.00 |
| 5000+ | $3.1000 | $15500.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
10214-6212PC
3M
Connector
1778573
Phoenix Contact
Connector
5227222-3
TE Connectivity
Connector
S4B-XH-SM4-TB(LF)(SN)
JST (JAPAN SOLDERLESS TERMINALS)
Connector
185226-2
TE Connectivity
Connector
0533980571
Molex
Connector
0360-0-15-01-34-27-10-0
Mill-Max
Connector
7850-0006PR
3M
Connector
AVB 1,5/2/12
BLOCK
Connector
N3764-5002RB
3M
Connector
N3627-6002RB
3M
Connector
N3627-5002RB
3M
Connector
N3440-6002RB
3M
Connector
929715-03-36-I
3M
Connector
929667-02-36-I
3M
Connector
929665-04-36-I
3M
Connector
929665-02-36-I
3M
Connector
929647-04-36-I
3M
Connector
929647-03-36-I
3M
Connector
7834-0006PR
3M
Connector
7826-0006PR
3M
Connector
7820-0006PR
3M
Connector
3440-5002
3M
Connector
3433-5302
3M
Connector