TSM-124-03-LM-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-124-03-LM-DH-A-K-TR is a 48-position dual-row surface mount terminal strip with 2.54 mm (0.100 inch) pitch and left-middle polarization key. Contacts are rated at 3 A per pin and 250 V AC with gold plating over nickel. Available in tape-and-reel format from stock with worldwide same-day shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 48
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TSM-124-03-LM-DH-A-K-TR?
- 48-position dual-row SMT terminal strip on standard 2.54 mm pitch, offering 24 contacts per row for high pin-count backplane designs
- Gold-plated contacts rated 3 A per pin and 250 V AC provide low contact resistance and reliable performance across industrial temperature ranges
- Left-middle (LM) polarization key combined with tape-and-reel (TR) packaging prevents mis-mating and supports automated high-volume SMT assembly
What is TSM-124-03-LM-DH-A-K-TR used for?
The TSM-124-03-LM-DH-A-K-TR is suited for daughter-card interconnects, embedded control modules, and industrial computing backplanes where a 48-pin SMT connector with reliable polarization is required. Its dual-height (DH) body provides adequate board-to-board clearance for cable routing, making it a practical choice for rackmount systems, FPGA carrier boards, and test-and-measurement fixtures.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-124-03-LM-DH-A-K-TR datasheet?
TSM-124-03-LM-DH-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-124-03-LM-DH-A-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the LM suffix mean on the TSM-124-03-LM-DH-A-K-TR, and how does it benefit assembly?
The LM suffix designates a left-middle polarization key position on the 48-pin dual-row connector body. This asymmetric key prevents 180-degree mis-mating during automated pick-and-place assembly, eliminating a potential error that could damage 48 pins worth of circuitry and reducing rework costs at volumes of thousands of units.
What current and voltage can each contact of the TSM-124-03-LM-DH-A-K-TR handle?
Each of the 48 gold-plated contacts is rated at 3 A continuous current and 250 V AC working voltage. At full load the connector dissipates roughly 0.18 W per pin assuming 20 mΩ contact resistance, well within the thermal limits of the 2.54 mm pitch SMT strip in a typical 25°C ambient environment.
How does TSM-124-03-LM-DH-A-K-TR compare to TSM-124-03-TL-DH-A-K-TR in practical PCB designs?
Both parts are 48-position dual-row SMT strips on 2.54 mm pitch rated at 3 A per pin, but they differ only in polarization key placement: LM positions the key on the left-middle while TL positions it at the top-left. A designer chooses LM when the mating housing's mechanical guide aligns at the board center rather than the corner, a common requirement in symmetric module form factors.
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