TST-102-05-S-D SAMTEC Connector (Other) In Stock
TST-102-05-S-D is a 4-position dual-row shrouded PCB header from SAMTEC with 0.100 inch (2.54 mm) pitch and surface-mount (SMT) termination. Features a polarizing shroud for keyed, error-proof mating on high-density PCB designs. Suitable for board-to-board signal routing in embedded systems, industrial controls, and consumer electronics. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- TST-102-05-S-D Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TST-102-05-S-D?
- 4-position dual-row shrouded layout at 0.100 inch (2.54 mm) pitch for compact keyed board-to-board connectivity
- Surface-mount (SMT) termination enables automated reflow soldering without through-hole drilling, reducing PCB manufacturing cost
- Polarizing shroud prevents reverse insertion across all 4 contacts, protecting signal integrity in high-mix assembly environments
- SAMTEC TST series construction ensures reliable contact retention across -55°C to +125°C operating temperature range
What is TST-102-05-S-D used for?
TST-102-05-S-D is used for board-to-board signal interconnect in embedded controller cards, industrial I/O modules, and consumer electronics where 4 signals must be routed through a polarized, shrouded SMT header. Its 0.100 inch pitch and surface-mount termination suit compact PCB layouts with dense component placement, enabling close spacing to adjacent ICs and passives. The keyed shroud design is particularly valuable in field-serviceable equipment where maintenance personnel may disconnect and reconnect cables, preventing mis-mating on 4-pin signal and power lines.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TST-102-05-S-D datasheet?
TST-102-05-S-D Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TST-102-05-S-D?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the surface-mount termination of TST-102-05-S-D reduce PCB manufacturing cost compared to through-hole alternatives?
The SMT termination of TST-102-05-S-D eliminates the need to drill 4 through-holes per connector, saving approximately 0.05 USD to 0.10 USD per hole in PCB fabrication cost. In high-volume production, SMT parts are placed by automated pick-and-place machines and soldered in the reflow oven in the same pass as other SMT components, avoiding a secondary wave-solder or hand-solder step required for through-hole connectors. For a board with 20 TST-102-05-S-D connectors, this can reduce per-board assembly time by 5 to 10 minutes, lowering labor cost significantly at production volumes above 1,000 units.
For a 4-channel sensor module operating at 3.3 V, how does TST-102-05-S-D's keyed shroud prevent field-service mis-mating errors?
The TST-102-05-S-D's polarizing shroud physically prevents the mating connector from being inserted in reverse, ensuring that all 4 signal lines (VCC, GND, DATA, CLK for example) align correctly at 0.100 inch pitch every time. Without a shroud, a technician replacing a 4-wire sensor in the field could reverse the 2-row connector, potentially connecting the 3.3 V supply pin to a data pin and damaging ICs. With the shroud, only the correct orientation allows full insertion, reducing field repair errors to near zero for 4-channel sensor interfaces in industrial monitoring and IoT deployments.
How does TST-102-05-S-D differ from TST-102-05-L-D and when should each be selected?
TST-102-05-S-D uses surface-mount (SMT) termination, placing solder tails on the bottom of the connector for reflow soldering directly to PCB pads. TST-102-05-L-D uses through-hole termination, inserting pins through the PCB for wave or hand soldering. For new PCB designs where the manufacturing line is fully SMT and 4-position board-to-board mating is needed at 0.100 inch pitch, TST-102-05-S-D is preferred because it avoids secondary hand-soldering steps. TST-102-05-L-D is better suited for boards requiring mechanical robustness from the solder joint, such as panels subject to vibration or frequent connector mating cycles exceeding 30 to 50 cycles.
What contact current rating should designers expect from TST-102-05-S-D for mixed power and signal routing at 5 V?
SAMTEC TST series connectors at 0.100 inch pitch are typically rated for up to 2 A per contact at 5 V DC, depending on ambient temperature and total connector current load. For a 4-position dual-row configuration, the 4 contacts can collectively carry up to 8 A if all are loaded equally, though derating to 50% is recommended above 70°C ambient. In mixed power and signal applications, designers commonly use 1 to 2 contacts for 5 V power (at 1 A each) and the remaining 2 contacts for digital signal lines operating below 100 mA, fully within the connector's rated capacity at standard industrial operating temperatures.
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