EMI2124MTTAG Equivalent & Substitute Parts

Part Overview

The EMI2124MTTAG is a 2-line common mode choke (CMC) surface mount component manufactured by onsemi, designed for signal line filtering applications. This component integrates TVS diode ESD protection and operates at 100mA maximum current with 8Ohm typical DC resistance. The part is classified as Last Time Buy, indicating limited future availability. Identifying equivalent substitute parts ensures design continuity and supply chain resilience for applications requiring this specific filtering and protection functionality.

Substiute Parts

EMI2124MTTAG

onsemiIn Stock: 5741EMI2124MTTAG Datasheet

Current PartRFQ

EMI2121MTTAG

onsemiIn Stock: 6253EMI2121MTTAG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EMI2124MTTAG is determined by strict parametric equivalence across the following critical specifications:

• Filter Type & Line Configuration: Signal line, 2-line common mode choke architecture
• Electrical Performance: 100mA maximum current rating and 8Ohm typical DC resistance
• Protection Feature: Integrated TVS diode ESD protection
• Physical Form Factor: 8-WFDFN Exposed Pad package with identical dimensions (0.087" L x 0.079" W, 0.032" max height)
• Operating Environment: -40°C to 85°C temperature range
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status

The EMI2121MTTAG qualifies as a parametric equivalent substitute, matching all specified electrical, mechanical, and environmental parameters while maintaining identical package geometry and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the EMI2124MTTAG and EMI2121MTTAG are Last Time Buy components from onsemi's EMI21 series. Selection between these parts should be based on current inventory availability and supply chain requirements rather than technical differentiation, as they are parametrically identical across all specified electrical, mechanical, and compliance parameters.

The EMI2121MTTAG currently maintains higher inventory levels (6200 pcs vs. 5685 pcs), making it the preferred selection for new designs or replenishment orders where supply continuity is a consideration. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Are EMI2124MTTAG and EMI2121MTTAG direct substitutes?

A: Yes. Both parts are parametrically equivalent across all specified electrical parameters (100mA current rating, 8Ohm DCR), mechanical form factor (8-WFDFN Exposed Pad, identical dimensions), operating temperature range (-40°C to 85°C), and integrated TVS diode ESD protection. They are interchangeable for signal line common mode choke applications.

Q: Do these parts require PCB layout modifications if substituted?

A: No. Both parts share identical package geometry (0.087" L x 0.079" W, 0.032" max height) and 8-WFDFN Exposed Pad configuration. PCB footprints, trace routing, and assembly processes remain unchanged.

Q: What is the significance of Last Time Buy status?

A: Last Time Buy indicates that onsemi will discontinue these components after current inventory is depleted. Designers should evaluate long-term supply requirements and consider design alternatives if extended component availability is critical for future production runs.

Q: Are there compliance differences between these parts?

A: No. Both EMI2124MTTAG and EMI2121MTTAG maintain identical ROHS3 compliance and REACH unaffected status. Regulatory requirements are satisfied equally by either part.

Q: How should inventory levels influence part selection?

A: The EMI2121MTTAG maintains higher current inventory (6200 pcs) compared to EMI2124MTTAG (5685 pcs). For applications requiring immediate procurement or larger volume orders, the EMI2121MTTAG may offer better supply availability.