97 E Pre-Earth FMLB | Pre-Earth Connector

The pre-earth connector performance of the 97 E Pre-Earth FMLB is critical in applications where operator protection, equipment integrity, and controlled grounding must work together from the moment connection begins. The 97 E Pre-Earth FMLB from Amphenol Industrial Operations is engineered for these environments, combining a cylindrical multi-pin format with first-mate last-break functionality and a grounded shell design to help redirect stray voltage safely to ground. For engineers and buyers evaluating a pre-earth connector for industrial equipment, this design offers an effective balance of safety, durability, and proven connection performance.

For OEMs, integrators, and maintenance teams, this pre-earth connector supports safer power and signal connections in demanding operating conditions where reliability cannot be left to chance. With a proven industrial connector architecture, multiple insert arrangements, and rugged environmental performance, the 97 E Pre-Earth FMLB is designed to support both new designs and retrofit applications.

Table of Contents

• Key Features & Benefits
• Typical Applications
• Technical Details
• Resources & Support

Key Features & Benefits

The 97 E Pre-Earth FMLB is designed for applications that require a protective circuit to be established between the ground contact and the connector shell before the remaining contacts engage. This sequence is especially valuable in systems where fault protection and shell grounding are essential to reducing electrical risk. By mating the ground path first and breaking it last during disconnect, the connector helps maintain a safer electrical transition during both installation and service.

This pre-earth connector also builds on a familiar industrial form factor with threaded coupling, durable construction, and intermating capability with MS 5015 and 97 Series connectors. That combination of protective sequencing and established mechanical architecture makes it a practical choice for engineers seeking dependable interconnect performance with improved grounding behavior.

One of the main benefits of this pre-earth connector is its ability to support safer operation in equipment where exposed conductive surfaces or fault conditions could create risk for personnel or sensitive electronics. The grounded-shell design helps direct stray voltage to a safe ground path, which can be important in reducing the chance of equipment damage or unsafe contact.

In applications where connectors may be mated and unmated during maintenance, testing, or field service, the first-mate last-break design adds another level of protection by preserving the grounding path throughout the connection cycle. Combined with IP67 protection in the receptacle unmated condition and the plug mated condition, this pre-earth connector supports both electrical protection and environmental durability in demanding industrial environments.

• First-mate last-break grounding sequence
• Grounded shell design to safely direct stray voltage
• Threaded coupling for secure mating
• IP67 sealing in key operating conditions
• Intermateable with MS 5015 and 97 Series connectors

Typical Applications

This pre-earth connector is a strong fit for industrial systems where grounding continuity and connection sequencing matter. That can include machinery, control equipment, power-related assemblies, ruggedized enclosures, and other environments where electrical faults, service access, or environmental exposure must be considered as part of the connector selection process.

Because the 97 E Pre-Earth FMLB is intermateable with MS 5015 and 97 Series connectors, it can also be attractive in retrofit, replacement, or platform standardization projects. Design teams working with legacy footprints or existing connector ecosystems may be able to improve grounding behavior and safety performance without completely redesigning surrounding hardware. This makes the pre-earth connector especially useful for upgrades where safety and compatibility both matter.

• Industrial machinery and equipment
• Electrical enclosures and control systems
• Power distribution assemblies
• Maintenance-intensive service applications
• Retrofit and replacement projects using legacy cylindrical interfaces

Technical Details

The 97 E Pre-Earth FMLB is available in multiple configurations to support varying electrical and mechanical requirements. It supports voltage ranges from 2000V to 3000V AC, current ratings from 13A to 80A, and contact counts from 3 to 9. Contact sizes range from 16 to 4, with 12 insert arrangements and shell sizes from 10SL to 32, helping engineers select the right pre-earth connector configuration based on circuit load, available space, and equipment design requirements.

From a materials standpoint, the connector is built for industrial service. It uses copper alloy contacts with silver plating, aluminum shells, and insert materials that include plastic resin and silicon rubber. Standard plating is black zinc alloy, with green zinc and other plating options available. The pre-earth connector is rated for operation from -55°C to 125°C and supports RoHS and REACH requirements along with UL and TUV certifications.

• Voltage: 2000V to 3000V AC
• Current rating: 13A to 80A
• Contact quantity: 3 to 9
• Contact sizes: 16 to 4
• Insert arrangements: 12
• Shell sizes: 10SL to 32
• Operating temperature: -55°C to 125°C
• Compliance: RoHS and REACH
• Certifications: UL and TUV

Resources & Support

For buyers, the value of the 97 E Pre-Earth FMLB goes beyond specifications. It addresses a functional safety need by helping protect people and equipment during connection and disconnection. For engineers, this pre-earth connector provides a combination of grounding assurance, industrial durability, and familiar mechanical architecture in a practical connector platform.

Review the available technical data, configuration options, and supporting product literature to match the right pre-earth connector to your application requirements. For design assistance, quote requests, or help selecting the correct configuration, contact the Amphenol Industrial Operations team.