TSM-121-05-G-SH-A SAMTEC Connector (Other) In Stock
The TSM-121-05-G-SH-A is a SAMTEC 21-position dual-row 0.100" (2.54 mm) pitch surface-mount terminal strip with horizontal (right-angle) orientation and a gold-plated shrouded housing. Each contact is rated for up to 3 A, making it suitable for signal and moderate-power board-to-board connections. Available in stock worldwide with competitive pricing and fast shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 21
- Lifecycle
- ACTIVE
- Datasheet
- TSM-121-05-G-SH-A Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 21-position dual-row layout at 0.100" (2.54 mm) pitch provides 42 total contacts in a compact right-angle SMT footprint for dense board-to-board interconnects
- Gold-plated contacts (G suffix) deliver superior corrosion resistance and lower contact resistance, ensuring reliable signal integrity over the product lifetime
- Shrouded housing provides mechanical polarization to prevent mis-mating in multi-connector assemblies, reducing field service errors
- Right-angle (horizontal) orientation allows mating in the plane of the PCB, ideal for edge-access connectors in rack-mounted or modular chassis designs
Applications
The TSM-121-05-G-SH-A is commonly used in modular embedded computing systems, test-and-measurement backplanes, and industrial controller boards where a 42-pin right-angle connector provides horizontal mating access from the PCB edge. Its gold-plated contacts ensure reliable performance in environments with temperature cycling from -55°C to +125°C, making it suitable for harsh industrial and mil-aero derivative applications. The shrouded design simplifies blind-mate assembly in rack systems where connectors are not directly visible during installation.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many total contacts and what current rating does the TSM-121-05-G-SH-A provide?
The TSM-121-05-G-SH-A has 21 positions in a dual-row configuration, yielding 42 total contacts, each rated at up to 3 A. This allows the connector to carry a combined maximum of 42 signal or power channels on a single 0.100" pitch footprint, reducing the number of discrete connectors required for complex multi-channel interface designs.
What advantage does gold plating on the TSM-121-05-G-SH-A contacts offer over tin-plated alternatives?
Gold-plated contacts on the TSM-121-05-G-SH-A provide a contact resistance typically below 20 mΩ and maintain this value across more than 500 mating cycles, whereas tin-plated contacts can oxidize and increase resistance after as few as 50 insertions in humid or industrial environments. Gold plating is particularly beneficial in low-voltage digital signal applications where even a 10 mΩ increase in contact resistance can cause voltage drop issues at 3.3 V logic levels.
How does the right-angle orientation of the TSM-121-05-G-SH-A benefit rack-mount or panel-mount system designs?
The right-angle (horizontal) orientation of the TSM-121-05-G-SH-A positions the mating direction parallel to the PCB surface, allowing connectors to be accessed from the side edge of the board. In a rack-mount chassis with 1U vertical card slots, this edge-access mating permits hot-plug card insertion without requiring access to the top or bottom of the PCB, significantly simplifying the mechanical enclosure design and reducing assembly time.
What SMT assembly and soldering specifications apply to the TSM-121-05-G-SH-A for automated production lines?
The TSM-121-05-G-SH-A is designed for standard lead-free SMT reflow processes with a peak temperature of 260°C for up to 10 seconds, compliant with IPC/JEDEC J-STD-020. The 0.100" (2.54 mm) pitch SMT pads align with IPC-7351 land pattern guidelines, and the shrouded housing provides a stable resting surface during paste printing and component placement, reducing tombstoning risk on 42-pad SMT layouts.
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