J1012F21C Equivalent & Substitute Parts

Part Overview

The J1012F21C is a 1-port RJ45 through-hole modular connector manufactured by Pulse Electronics, designed for 10/100 Base-TX Ethernet applications with AutoMDIX capability. This connector features a 90° right-angle orientation, integrated LED indicators (Yellow-Green), and shielded design with EMI finger protection. The part is currently classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

J1012F21C

Pulse ElectronicsIn Stock: 672J1012F21C Datasheet

Current PartRFQ

J1012F21CNL

Pulse ElectronicsIn Stock: 15953J1012F21CNL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the J1012F21C is determined by strict equivalence across the following critical parameters:

• Connector Type & Port Configuration: RJ45, single port
• Mechanical Interface: Through-hole mounting, 90° right-angle orientation, 0.550" (13.97mm) height above board
• Electrical Performance: 10/100 Base-TX with AutoMDIX support
• Physical Design: Shielded construction with EMI finger, solder termination
• Environmental Specifications: Operating temperature 0°C ~ 70°C, contact material and finish specifications

The J1012F21CNL meets all these criteria and is classified as a direct substitute. Both parts belong to the PULSEJACK™ J1 series and maintain identical mechanical and electrical characteristics, with the primary distinction being product status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The J1012F21CNL is the direct substitute for the obsolete J1012F21C. Both parts are electrically and mechanically identical across all functional parameters. The J1012F21CNL is the preferred selection for new designs and ongoing production due to its active product status and RoHS compliance. The J1012F21CNL maintains full compatibility with existing PCB layouts and assembly processes designed for the J1012F21C, requiring no design modifications.

For applications subject to RoHS regulations or environmental compliance requirements, the J1012F21CNL is the only compliant option between these two parts. Both parts share identical ECCN and HTSUS classifications, ensuring consistent export and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Can J1012F21CNL be used as a direct replacement for J1012F21C on existing PCBs?

A: Yes. The J1012F21CNL is mechanically and electrically identical to the J1012F21C. No PCB layout modifications are required. Both parts have identical mounting footprints, solder pad configurations, and mechanical envelope specifications.

Q: What is the primary difference between J1012F21C and J1012F21CNL?

A: The J1012F21CNL is the active production variant with RoHS compliance, while the J1012F21C is obsolete and RoHS non-compliant. The J1012F21CNL is supplied in tube packaging. All electrical and mechanical specifications are identical.

Q: Are there any compliance considerations when switching from J1012F21C to J1012F21CNL?

A: The J1012F21CNL is RoHS compliant, making it suitable for applications subject to RoHS regulations. The J1012F21C is RoHS non-compliant. Both parts are REACH unaffected and classified as EAR99 for export purposes.

Q: What packaging is available for the J1012F21CNL?

A: The J1012F21CNL is supplied in tube packaging. The original J1012F21C packaging specification is not provided in the technical documentation.

Q: Are the electrical performance characteristics identical between these parts?

A: Yes. Both parts support 10/100 Base-TX with AutoMDIX, feature identical LED indicators (Yellow-Green), and operate across the same temperature range (0°C ~ 70°C). Contact material, finish, and shielding specifications are identical.