TSM-128-04-STL-DH-P-TR SAMTEC Connector (Other) In Stock
The TSM-128-04-STL-DH-P-TR is a 56-position dual-row surface-mount terminal strip from SAMTEC with a 0.100" (2.54 mm) pitch and a low-profile SMT right-angle lead style. It features polarized (P) keying and tape-and-reel delivery for high-volume automated assembly, offering reliable board-to-board connectivity in embedded computing, instrumentation, and industrial control applications.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 56
- Lifecycle
- ACTIVE
- Datasheet
- TSM-128-04-STL-DH-P-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TSM-128-04-STL-DH-P-TR?
- 56 positions in dual-row layout at 0.100" (2.54 mm) pitch for high-density signal and power routing
- Polarized (-P) keying prevents mis-insertion and ensures correct mating orientation every time
- Surface-mount right-angle lead style for low-profile horizontal mating in height-constrained enclosures
- Tape-and-reel (-TR) packaging compatible with automated SMT pick-and-place production lines
- SAMTEC TSM series construction with consistent contact plating for low contact resistance across 56 positions
What is TSM-128-04-STL-DH-P-TR used for?
The TSM-128-04-STL-DH-P-TR is designed for high-density dual-row header connections in industrial control modules, embedded single-board computers, and test-and-measurement equipment where 56-pin connectivity at 0.100" pitch is specified. Its polarized keying prevents assembly errors on boards with multiple adjacent connectors, while the surface-mount right-angle footprint suits flat-panel enclosures and stacked PCB architectures with strict vertical height limits.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-128-04-STL-DH-P-TR datasheet?
TSM-128-04-STL-DH-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-128-04-STL-DH-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does polarized keying on TSM-128-04-STL-DH-P-TR prevent mating errors in multi-connector PCB assemblies?
The -P (polarized) feature introduces an asymmetric key position within the 56-pin dual-row housing that physically prevents insertion into an adjacent non-keyed socket or a connector rotated 180 degrees. On boards with multiple 0.100" pitch dual-row headers placed side by side, this eliminates cross-connector mis-insertion that could damage 56 pins of circuitry or blow protection circuits on a 3.3 V or 5 V bus.
What is the pin-count difference between TSM-128-04-STL-DH-P-TR and the 60-position TSM-130 series, and when does 56 pins suffice?
TSM-128-04-STL-DH-P-TR provides 56 positions (2 rows of 28) versus 60 positions in the TSM-130 series, saving 4 pins and reducing connector body length by approximately 5.08 mm at 0.100" (2.54 mm) pitch. Designers choose the 56-pin version when the bus architecture fits within 28 columns, freeing board space that the slightly shorter connector vacates.
What SMT reflow profile is suitable for soldering TSM-128-04-STL-DH-P-TR onto a board?
SAMTEC TSM series surface-mount connectors are compatible with standard SAC305 lead-free reflow profiles peaking at 260°C for no more than 30 seconds above 217°C, per IPC/JEDEC J-STD-020 MSL guidelines. The -STL lead style holds the connector flush during reflow, and tape-and-reel (-TR) packaging feeds directly to pick-and-place without traying, supporting continuous reflow assembly at high throughput for boards carrying 56-position dual-row headers.
How many power and signal circuits can TSM-128-04-STL-DH-P-TR carry in a mixed-function bus application?
With 56 total positions at 0.100" pitch, designers typically allocate 4 to 8 pins in parallel for power delivery at 1 A per pin, and dedicate the remaining 48 to 52 pins to address, data, control, and ground signals. This mixed allocation satisfies standard embedded bus connectivity without requiring a larger 60- or 64-pin connector.
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