Why I’m Comparing These Two Samtec Parts
I’ve been handling connector and cable orders for 9 years. I’ve personally made (and documented) 7 significant mistakes, totaling roughly $18,400 in wasted budget. Now I maintain our team’s pre-order checklist. The list keeps growing because I keep finding new ways to confuse similar-looking Samtec parts.
This is not a lab report. I’m comparing samtec ssw and samtec ftsh-105-01-l-dv-k because they show up in the same enclosure builds on my desk—and because mixing them up cost me $1,240 in rework plus a 6-day delay in September 2022.
My comparison criteria: pitch and density, mating and hardware, enclosure fit, and total cost of ownership (TCO). TCO means unit price plus setup, freight, rework, delay, and risk. If you only compare the per-piece price, you’re probably going to miss the expensive part.
Per Samtec's FTSH series documentation (accessed January 2025), the FTSH-105-01-L-DV-K is a .050-inch pitch, dual-row, vertical terminal strip with a locking clip. The SSW series is a .100-inch pitch socket strip. Verify current specs and mating charts at samtec.com before you design either one in.
Dimension 1: Pitch and Density
Samtec SSW is a .100-inch pitch socket strip. It’s the familiar workhorse: easy to probe, easy to hand-solder in low volume, and usually more forgiving for prototypes. The FTSH-105-01-L-DV-K is a .050-inch pitch header. It’s denser, smaller, and better when board real estate is tight.
Here’s the counterintuitive part: the denser part is not automatically cheaper or easier. In my experience, .050-inch pitch parts often mean tighter assembly tolerances, more careful paste stencils, and less room for rework. On a recent order, we saved 0.6 square inches of board space with the FTSH part, but we spent that savings on inspection time. I think that trade-off is worth it only if your assembly house is comfortable with fine-pitch SMT.
If you’re searching for samtec ssw because you need a robust .100-inch socket, don’t switch to FTSH just because it looks smaller. They solve different layout problems. My experience is based on about 140 connector orders, mostly medium-volume industrial and instrumentation work. If you’re doing high-volume consumer electronics, your tolerances and cost model might be different.
Dimension 2: Mating and Hardware
This is where I lost money. SSW is a socket strip. FTSH-105-01-L-DV-K is a terminal strip—a header. They are not drop-in replacements for each other. You need the correct mating half, and you need to check the mating chart, not just the series name.
In September 2022, I ordered 250 SSW socket strips for an enclosure build without checking the mating height. The header we planned to use was from a different family. It looked fine on my screen. The result came back with a 3.2 mm stack mismatch. 250 pieces, $1,240 in rework, straight to the scrap bin. That’s when I learned to keep a mating-height column in our checklist.
For FTSH-105-01-L-DV-K, the locking clip is useful, but it also changes the insertion and removal force. On one prototype, the clip made the connection feel secure—then we realized we couldn’t unmate it without a small pry tool and a lot of patience. That’s not a Samtec problem; it’s a design problem. If your enclosure needs field service, think about how a technician will actually unplug the thing.
Dimension 3: Enclosure Fit and the 7.1 mm Problem
Enclosures are where connector choices get real. You can have a perfect electrical part and still fail because the lid won’t close.
Our drawing for a recent project called out a 7.1 mm maximum component height above the PCB. I specified the samtec ftsh-105-01-l-dv-k because the header itself was low profile. What I forgot was the mating socket height plus the PCB thickness tolerance plus the pick-and-place pad. The stack exceeded 7.1 mm. The enclosure lid sat 0.8 mm too high.
SSW would not have solved that automatically. A .100-inch pitch socket strip is usually taller, not shorter. But the lesson is the same: compare the full mated stack, not the single connector. For enclosures, I now add three numbers to every quote: mated height, minimum clearance, and the tolerance stack. If a supplier quote doesn’t list those, I ask. If they can’t answer, that’s a risk cost.
(Note to self: update the enclosure checklist to include cable bend radius too. I keep forgetting that one.)
Dimension 4: Total Cost of Ownership
The $0.38-per-piece SSW quote looked cheaper than the $0.74-per-piece FTSH quote on one project. But the SSW order needed a different header family, a new stencil aperture, and a rework loop. The FTSH order needed a $250 setup fee and a 2-week lead time. After freight, inspection, and one revision, the FTSH path was actually cheaper by roughly $300. Don’t hold me to that exact number—it was project-specific—but the direction was clear.
TCO includes:
- Unit price (obvious, and rarely the whole story)
- Setup fees and tooling
- Minimum order quantity and excess inventory
- Freight and customs
- Incoming inspection time
- Rework, scrap, and delay
- Risk of a wrong mating half or a 7.1 mm clearance miss
I now calculate TCO before comparing any vendor quotes. Most of the time, the lowest unit price is not the lowest total cost. Occasionally it is—usually when the design is simple and the volume is high. But I’ve been burned enough times that I check.
Dimension 5: Documentation and Support
Good documentation is a real cost saver. Bad documentation is a hidden cost. I once spent 25 minutes on a supplier portal trying to confirm a mating chart. One search result looked promising but turned out to be a generic help page—less useful than how to unblock a number on phone. I wish I were joking. Since then, I keep PDF datasheets in our project folder and verify the part number against the Samtec website before release.
For Samtec specifically, the mating charts and 3D models are usually available. That helps. But you still have to open them. A part number that looks right in a spreadsheet can be wrong in an enclosure. I’ve caught 47 potential part-number errors using our pre-check list in the past 18 months. Not all were Samtec, but enough were.
Which One Should You Choose?
Choose Samtec SSW if you need a .100-inch pitch socket strip, you’re prototyping or doing low-volume through-hole work, and you have room in the enclosure. It’s easier to probe, easier to rework, and usually more forgiving for mixed-technology assemblies.
Choose the Samtec FTSH-105-01-L-DV-K if you need a .050-inch pitch, dual-row header, you’re comfortable with fine-pitch SMT, and you’ve verified the mating half, the locking clip behavior, and the full mated height. It’s a good part for dense board-to-board connections—but it is not a generic substitute for an SSW socket.
If you’re not sure, don’t pick based on unit price. Pick based on the full TCO and the enclosure constraints. That’s the checklist I wish I had in 2017. I didn’t fully understand TCO until a $1,240 rework bill came back with my name on it. Now I do.