Keystone Electronics 8721 Terminal Block - Equivalent & Substitute Parts

Part Overview

The Keystone Electronics 8721 is a 3-position wire-to-board terminal block with a 45° mounting angle and 5.00mm pitch, designed for through-hole PCB assembly. This component features screw-leaf spring wire termination with integrated wire guard protection and side interlocking capability. The part is actively manufactured and maintains full RoHS3 compliance with unlimited moisture sensitivity rating. Substitute parts are identified when original stock becomes unavailable or when design requirements permit alternative terminal block configurations that maintain electrical and mechanical compatibility within specified parameter ranges.

Substiute Parts

8721

Keystone ElectronicsIn Stock: 12038721 Datasheet

Current PartRFQ

ED3000/3

On Shore Technology Inc.In Stock: 2013ED3000/3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Keystone Electronics 8721 is determined by strict alignment of the following critical parameters:

• Positions Per Level: Must equal 3
• Pitch: Must equal 0.197" (5.00mm)
• Mating Orientation: Must equal 45° (135°) Angle with Board
• Mounting Type: Must equal Through Hole
• Current Rating: Must be ≥ 16 A
• Voltage Rating: Must be ≥ 250 V
• Wire Gauge Compatibility: Must accommodate 14-22 AWG range
• Operating Temperature Range: Must encompass -30°C minimum
• Compliance: Must maintain RoHS3 and REACH compliance status

The On Shore Technology Inc. ED3000/3 terminal block meets all substitution criteria within these parameter boundaries, permitting direct functional replacement in applications where the specified electrical and mechanical requirements are satisfied.

Parameter Comparison

Engineering Selection Recommendations

Both the Keystone Electronics 8721 and On Shore Technology ED3000/3 maintain active product status with full RoHS3 compliance and REACH unaffected designation, qualifying both for use in regulated applications. The ED3000/3 provides enhanced voltage margin (300 V versus 250 V) and extended wire gauge accommodation (14-28 AWG versus 14-22 AWG), supporting broader design flexibility. Selection between these components should account for termination method requirements: the 8721 employs screw-based termination with integrated wire guard, while the ED3000/3 utilizes screwless push-in spring termination. Operating temperature ceiling differs by 15°C, with the 8721 rated to 120°C and the ED3000/3 to 105°C. Housing material composition varies between PBT and polyamide, affecting mechanical and thermal characteristics in specific application environments.

Frequently Asked Questions (FAQ)

Q: Can the On Shore Technology ED3000/3 directly replace the Keystone Electronics 8721 in existing designs?

A: Direct replacement is possible when application requirements do not mandate screw-based termination or the 120°C upper temperature rating. The ED3000/3 meets all critical electrical parameters and maintains identical pitch, position count, and mounting orientation. PCB layout compatibility requires verification due to potential dimensional variations between manufacturers.

Q: What is the primary difference in wire termination between these two parts?

A: The Keystone 8721 uses screw-leaf spring termination with integrated wire guard, requiring tool-based wire insertion and screw tightening. The On Shore ED3000/3 employs screwless push-in spring termination, enabling tool-free wire insertion. This functional difference may impact assembly procedures and maintenance accessibility.

Q: Are both parts suitable for high-temperature applications?

A: The Keystone 8721 operates to 120°C, supporting higher-temperature environments. The On Shore ED3000/3 operates to 105°C. Applications requiring sustained operation above 105°C necessitate the Keystone part or alternative components rated for higher temperatures.

Q: Do both parts support the same wire gauge range?

A: The Keystone 8721 accommodates 14-22 AWG wire. The On Shore ED3000/3 accommodates 14-28 AWG wire, providing compatibility with smaller gauge conductors. Both support the standard 14-22 AWG range, ensuring compatibility for conventional applications within this overlap.

Q: What compliance certifications apply to both parts?

A: Both the Keystone 8721 and On Shore ED3000/3 maintain RoHS3 compliance and REACH unaffected status, qualifying for use in regulated markets and applications subject to environmental compliance requirements.