TSM-125-03-T-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-125-03-T-DH-A-K-TR is a 50-position dual-row SMT terminal strip at 0.100" (2.54 mm) pitch with a dual-height housing and keying feature for reliable orientation-safe board-to-board connectivity. Tail-post configuration with surface-mount termination enables automated reflow assembly in high-pin-count industrial and commercial applications. Available from global distributors with fast worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 50
- Lifecycle
- ACTIVE
- Datasheet
- TSM-125-03-T-DH-A-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TSM-125-03-T-DH-A-K-TR?
- 50-position dual-row SMT terminal strip at 2.54 mm (0.100 inch) pitch for large-scale board-to-board or wire-to-board signal and power interconnection
- Keyed (K) housing prevents incorrect mating orientation across all 50 positions, ensuring polarity safety in dense connector systems
- Double-height (DH) housing provides extra clearance above the PCB, accommodating thick cable harnesses and strain relief in industrial installations
- Tail-post (T) contact style designed for surface-mount reflow soldering, enabling automated high-volume PCB assembly without through-hole drilling
What is TSM-125-03-T-DH-A-K-TR used for?
The TSM-125-03-T-DH-A-K-TR is used in large embedded computing backplanes, industrial control expansion boards, and signal-distribution panels where a 50-pin 2.54 mm pitch SMT terminal strip with keying is required. Its double-height housing and keyed design suit field-serviceable PLCs, power management modules, and data acquisition systems where correct mating across 50 positions must be ensured even under time pressure or limited visibility during maintenance.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-125-03-T-DH-A-K-TR datasheet?
TSM-125-03-T-DH-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-125-03-T-DH-A-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the pin count and row configuration of the TSM-125-03-T-DH-A-K-TR?
The TSM-125-03-T-DH-A-K-TR is a 50-position dual-row terminal strip with 25 contacts per row at a 2.54 mm (0.100 inch) pitch. The dual-row layout spans approximately 60 mm in length, providing a high-density interconnect suitable for carrying many parallel signal, power, and ground lines across two stacked PCBs in a single connector footprint.
How does the keying feature of the TSM-125-03-T-DH-A-K-TR prevent costly assembly or field service errors?
The keying (K) option adds a mechanical polarization feature to the TSM-125-03-T-DH-A-K-TR that physically blocks mating in the wrong orientation. With 50 positions in a dual-row layout, an inverted connection could swap 25 signal pairs, potentially damaging components or causing system faults. Keying eliminates this risk during both automated factory assembly and field technician maintenance.
What advantages does the tail-post (T) style provide over long-post or short-post variants for SMT assembly?
The tail-post (T) style on the TSM-125-03-T-DH-A-K-TR has a contact geometry optimized for surface-mount solder joints, with a flared or flat tail designed to sit reliably on SMT pads during reflow. Compared to long-post or short-post variants intended for through-hole or tall-receptacle mating, the tail-post style produces lower-profile, mechanically stable solder joints suitable for high-vibration industrial environments.
For a 50-position backplane design, when should a designer choose the TSM-125-03-T-DH-A-K-TR over a higher-density 1.27 mm pitch alternative?
The 2.54 mm pitch TSM-125-03-T-DH-A-K-TR is preferred over 1.27 mm pitch alternatives when the design uses larger wire gauges (20-24 AWG), requires hand-soldering capability for prototyping, or must interface with existing 2.54 mm pitch mating connectors in the system. The larger pitch also provides greater creepage distance between adjacent contacts, supporting higher working voltages in mixed-signal or power-carrying 50-pin backplane designs.
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