EM221808H Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The EM221808H is an 8-position terminal block header manufactured by Eaton Electronics Division, designed for through-hole solder mounting applications. This component features male pins with 4-side shrouding, 90° right-angle orientation, and 0.200" (5.08mm) pitch spacing. The part is actively produced and maintains inventory availability of 1120 pieces in new original condition. Terminal block headers of this specification are essential for applications requiring reliable electrical connections in industrial control systems, power distribution, and signal routing where standardized pitch and voltage ratings are critical design parameters.

Substiute Parts

EM221808H

Eaton - Electronics DivisionIn Stock: 1183EM221808H Datasheet

Current PartRFQ

796866-8

TE Connectivity AMP ConnectorsIn Stock: 784796866-8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EM221808H is determined by strict alignment of the following critical parameters:

Position and Pitch Compatibility: The substitute part must maintain 8 positions with 0.200" (5.08mm) pitch spacing to ensure mechanical and electrical compatibility with mating connectors and PCB layouts.

Orientation and Mounting: The 90° right-angle orientation and through-hole solder termination are non-negotiable for form-factor compatibility in existing designs.

Electrical Ratings: Substitute parts must meet or exceed the 300 V UL voltage rating. Current rating of the substitute (15 A for TE Connectivity 796866-8) exceeds the main part specification (12 A), providing equivalent or superior performance.

Shrouding Configuration: The 4-side shrouded male pin header configuration must be maintained for mechanical protection and proper mating interface.

Compliance and Material Standards: Both parts must maintain UL94 V-0 flammability rating and active product status to ensure regulatory compliance and supply chain continuity.

The TE Connectivity AMP Connectors part number 796866-8 meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - EM221808H (Eaton Electronics Division): The EM221808H remains the primary specification when original design validation and exact parameter matching are required. This part carries ROHS3 compliance certification and maintains active production status with substantial inventory availability (1120 pieces). The operating temperature range of -55°C to 105°C supports extended environmental applications.

Substitute Selection - 796866-8 (TE Connectivity AMP Connectors): The 796866-8 qualifies as a direct substitute based on matching mechanical form factor, electrical ratings, and compliance certifications. The substitute provides enhanced current capacity (15 A versus 12 A) and extended upper operating temperature (110°C versus 105°C), representing equivalent or superior performance within the specified parameter set. RoHS compliance is confirmed. Inventory availability is 700 pieces in new original condition.

Selection Criteria: Choose the EM221808H when design documentation explicitly specifies Eaton Euro-Mag EM2218 series components or when supply chain continuity with the original manufacturer is a contractual requirement. Select the 796866-8 when equivalent electrical and mechanical performance is acceptable and TE Connectivity supply chain integration is preferred, or when the enhanced current rating provides operational margin for the application.

Both parts carry identical HTSUS classification (8536.69.4040) and ECCN designation (EAR99), confirming regulatory equivalence for export and procurement purposes.

Frequently Asked Questions (FAQ)

Q: Can the 796866-8 be used as a direct replacement for the EM221808H in existing PCB designs?

A: Yes. Both parts maintain identical 8-position configuration, 0.200" (5.08mm) pitch spacing, 90° right-angle orientation, and through-hole solder termination. The mechanical footprint and electrical interface are equivalent. The substitute part will function identically in existing circuit board layouts without modification.

Q: What is the difference in current rating between these parts, and does it affect compatibility?

A: The EM221808H is rated for 12 A (UL), while the 796866-8 is rated for 15 A (UL). The substitute part exceeds the original specification. This difference does not create compatibility issues; rather, the substitute provides additional current capacity margin. Applications designed for 12 A operation will function within the 15 A rated capacity of the substitute.

Q: Are there differences in operating temperature ranges that affect substitution?

A: The EM221808H operates from -55°C to 105°C, while the 796866-8 operates from -40°C to 110°C. The substitute part has a higher minimum temperature (-40°C versus -55°C) and higher maximum temperature (110°C versus 105°C). For applications requiring operation below -40°C, the original EM221808H must be specified. For standard industrial temperature ranges, both parts are equivalent.

Q: Do the different contact materials (Brass versus Copper Alloy) affect electrical performance?

A: Both brass and copper alloy contacts provide equivalent electrical conductivity and mating reliability for this application category. The contact material difference does not create functional incompatibility. Both materials are tin-plated for corrosion resistance and solder compatibility.

Q: Are both parts RoHS compliant?

A: Yes. The EM221808H carries ROHS3 compliance certification. The 796866-8 carries RoHS compliance certification. Both parts meet lead-free and hazardous substance restriction requirements for current regulatory standards.

Q: What is the difference in housing material, and does it affect mechanical compatibility?

A: The EM221808H uses thermoplastic housing, while the 796866-8 uses polyamide (PA66) nylon 6/6. Both materials provide equivalent mechanical strength, UL94 V-0 flammability rating, and dimensional stability. The housing material difference does not affect form factor, mating interface, or mechanical compatibility.

Q: Can I mix EM221808H and 796866-8 parts in the same assembly?

A: Yes. Both parts maintain identical pitch, position count, and mating interface specifications. They can be used interchangeably within the same assembly or production batch without functional impact.

Q: What is the inventory status for each part?

A: The EM221808H has 1120 pieces available in new original condition. The 796866-8 has 700 pieces available in new original condition. Both parts maintain active production status with ongoing supply availability.