TOLC-135-02-L-Q-LC SAMTEC Connector (Other) In Stock
SAMTEC TOLC-135-02-L-Q-LC is a RoHS-compliant four-row board receptacle connector with phosphor bronze male contacts finished in 10 microinch gold over 50 microinch nickel for reliable low-resistance mating. The 1.85 inch body supports high-density signal routing in backplane and mezzanine card applications. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 140
- Lifecycle
- ACTIVE
- Datasheet
- TOLC-135-02-L-Q-LC Datasheet PDF
- Category
- Connector
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Four-row (FOURRAY) board receptacle configuration delivers high pin density for backplane and mezzanine applications requiring large signal counts in a compact 1.85 inch body
- 10 microinch gold over 50 microinch nickel contact finish ensures reliable low-resistance mating connections across hundreds of engagement cycles
- Phosphor bronze contact material provides excellent spring-back retention force, maintaining consistent contact pressure over the connector service life
Applications
The TOLC-135-02-L-Q-LC is well-suited for high-density mezzanine card sockets, backplane-to-daughtercard interconnects, and instrumentation chassis where a four-row receptacle configuration is required for large signal counts. Its gold-over-nickel finish and phosphor bronze contacts make it reliable in demanding industrial and laboratory environments with frequent card insertion cycles.
Specifications
| Pbfree Code | Yes |
| YTEOL | 9 |
| Additional Feature | FOURRAY |
| Body Length | 1.85inch |
| Body/Shell Style | RECEPTACLE |
| Connector Type | BOARD CONNECTOR |
| Contact Finish Mating | GOLD (10) OVER NICKEL (50) |
| Contact Finish Termination | Gold (Au) - with Nickel (Ni) barrier |
| Contact Gender | MALE |
| Contact Material | PHOSPHOR BRONZE |
| Contact Pattern | STAGGERED |
| DIN Conformance | NO |
| Filter Feature | NO |
| IEC Conformance | NO |
| Insulator Color | BLACK |
| Insulator Material | LIQUID CRYSTAL POLYMER |
| JESD-609 Code | e4 |
| MIL Conformance | NO |
| Mating Contact Pitch | 0.05inch |
| Mating Contact Row Spacing | 0.05inch |
| Mating Information | MULTIPLE MATING PARTS AVAILABLE |
| Mixed Contacts | NO |
| Mounting Style | STRAIGHT |
| Mounting Type | BOARD |
| Number Of Connectors | ONE |
| Number of Rows Loaded | 4 |
| Option | GENERAL PURPOSE |
| PCB Contact Pattern | RECTANGULAR |
| Plating Thickness | 10u inch |
| Rated Current (Signal) | 2.4A |
| Reference Standard | UL |
| Terminal Pitch | 0.635mm |
| Termination Type | SURFACE MOUNT |
| Total Number of Contacts | 140 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.69.40.40 |
| Country of Origin | Malaysia, USA |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What contact finish does the TOLC-135-02-L-Q-LC use and how does it affect connector reliability?
The TOLC-135-02-L-Q-LC uses 10 microinch gold over 50 microinch nickel on both the mating and termination surfaces. This finish provides low and stable contact resistance across hundreds of mating cycles, prevents oxidation in humid environments, and is fully RoHS compliant, making the connector suitable for industrial and medical equipment requiring long-term electrical reliability.
What does the FOURRAY configuration mean on the TOLC-135-02-L-Q-LC and which systems benefit from it?
FOURRAY denotes a four-row contact arrangement within the 1.85 inch connector body, which dramatically increases signal density compared to dual-row alternatives of the same length. High-speed test and measurement backplanes, FPGA mezzanine cards, and dense I/O industrial controller boards benefit from the four-row layout because it provides more than double the pin count of a 2-row connector occupying the same board length.
When should engineers choose phosphor bronze contacts like those in the TOLC-135-02-L-Q-LC over brass alternatives?
Phosphor bronze is preferred over brass when the connector will experience repeated mating cycles because phosphor bronze exhibits superior spring-back retention force, maintaining consistent contact pressure even after 500 or more engagement cycles. In card-cage and backplane applications where boards are inserted and removed during maintenance, phosphor bronze contacts ensure reliable 50 milliohm or better contact resistance is maintained over the product lifetime.
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