TFM-120-11-S-D Equivalent & Substitute Parts

Part Overview

The TFM-120-11-S-D is an active Samtec Tiger Eye™ TFM series rectangular connector header designed for through-hole board-to-board or cable applications. This 40-position, dual-row connector operates at 0.050" (1.27mm) pitch with gold-plated mating contacts and tin-plated posts. The connector features shrouded 4-wall construction with push-pull fastening and is rated for 2.9A per contact at 275VAC across an operating temperature range of -55°C to 125°C. Alternative models within the same series provide enhanced mechanical features while maintaining core electrical and dimensional compatibility.

Substiute Parts

TFM-120-11-S-D

Samtec Inc.In Stock: 737TFM-120-11-S-D Datasheet

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TFM-120-31-S-D-A

Samtec Inc.In Stock: 1240TFM-120-31-S-D-A Datasheet

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TFM-120-31-S-D-LC

Samtec Inc.In Stock: 856TFM-120-31-S-D-LC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution within the TFM-120 series is determined by electrical and mechanical compatibility across the following critical parameters:

• Connector type, contact type, and gender (Header, Male Pin)
• Number of positions and rows (40 positions, 2 rows)
• Mating pitch and row spacing (0.050" / 1.27mm)
• Contact material, finish, and current rating (Phosphor Bronze, Gold/Tin plating, 2.9A per contact)
• Voltage rating and operating temperature range (275VAC, -55°C ~ 125°C)
• Mounting method and termination (Through Hole, Solder)
• Shrouding configuration (Shrouded - 4 Wall)
• Fastening mechanism (Push-Pull)

The substitute parts TFM-120-31-S-D-A and TFM-120-31-S-D-LC maintain all core electrical specifications and contact characteristics. Differences are limited to insulation height and mechanical features (Board Guide or Board Lock), which do not affect electrical interchangeability or contact performance.

Parameter Comparison

Engineering Selection Recommendations

All three connectors maintain identical electrical specifications, contact performance, and compliance certifications. Selection between TFM-120-11-S-D, TFM-120-31-S-D-A, and TFM-120-31-S-D-LC is determined by mechanical requirements and board integration features.

The TFM-120-11-S-D features a lower insulation height of 0.290" (7.37mm) and is suitable for applications with space constraints or standard board-to-board configurations.

The TFM-120-31-S-D-A incorporates a Board Guide feature with increased insulation height of 0.435" (11.05mm), providing mechanical alignment assistance during mating operations.

The TFM-120-31-S-D-LC includes a Board Lock feature with the same 0.435" (11.05mm) insulation height, offering positive mechanical retention after connection.

All parts are ROHS3 compliant, rated for -55°C to 125°C operation, and carry UL94 V-0 flammability certification. The substitute parts TFM-120-31-S-D-A and TFM-120-31-S-D-LC are classified as MSL 1 (Unlimited), while the main part TFM-120-11-S-D is not subject to moisture sensitivity limitations.

Frequently Asked Questions (FAQ)

Q: Are TFM-120-31-S-D-A and TFM-120-31-S-D-LC electrically interchangeable with TFM-120-11-S-D?

A: Yes. All three connectors share identical electrical specifications, including contact material, current rating (2.9A per contact), voltage rating (275VAC), operating temperature range (-55°C to 125°C), and contact geometry. Electrical performance and signal integrity are equivalent.

Q: What is the difference between Board Guide and Board Lock features?

A: Board Guide (TFM-120-31-S-D-A) provides mechanical alignment assistance during connector mating. Board Lock (TFM-120-31-S-D-LC) provides positive mechanical retention after connection. Both features are mechanical only and do not affect electrical characteristics.

Q: Does the increased insulation height of the substitute parts affect PCB layout?

A: The substitute parts TFM-120-31-S-D-A and TFM-120-31-S-D-LC have an insulation height of 0.435" (11.05mm) compared to 0.290" (7.37mm) for the TFM-120-11-S-D. This difference must be considered in board-level clearance planning and component placement. Contact geometry and mating pitch remain unchanged.

Q: Are all three parts RoHS compliant?

A: Yes. All three connectors are ROHS3 compliant and carry UL94 V-0 flammability certification.

Q: What is the difference in moisture sensitivity between the main part and substitute parts?

A: The TFM-120-11-S-D is not subject to moisture sensitivity limitations. The substitute parts TFM-120-31-S-D-A and TFM-120-31-S-D-LC are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Can these connectors be used in high-temperature applications?

A: Yes. All three connectors are rated for continuous operation from -55°C to 125°C, suitable for industrial and automotive applications within this temperature range.

Q: Are the contact finishes identical across all three parts?

A: Yes. All three connectors feature gold-plated mating contacts (30.0µin / 0.76µm thickness) and tin-plated posts, ensuring consistent contact resistance and corrosion resistance.