ELL-8TP221MB Equivalent & Substitute Parts

Part Overview

The ELL-8TP221MB is a 220 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 700 mA continuous current with 480mOhm DC resistance. This component features nonstandard corner terminals and surface mount packaging in an 8.00mm × 8.00mm footprint. The product is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

ELL-8TP221MB

Panasonic Electronic ComponentsIn Stock: 934ELL-8TP221MB Datasheet

Current PartRFQ

CLF7045NIT-221M-D

TDK CorporationIn Stock: 3256CLF7045NIT-221M-D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-8TP221MB is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 220 µH ±20% tolerance
• Shielding requirement: Shielded construction
• Mounting type: Surface Mount
• Inductance test frequency: 100 kHz

Secondary Compatibility Factors:

• Current rating must meet or exceed 700 mA continuous operation
• DC resistance (DCR) must remain within acceptable limits for the application circuit
• Operating temperature range must encompass the design operating window
• Package footprint and height must accommodate PCB layout constraints
• RoHS3 compliance and MSL rating must match or exceed the original specification

The CLF7045NIT-221M-D from TDK Corporation qualifies as a functional substitute based on matching inductance value, tolerance, shielding type, and surface mount configuration. However, substitution feasibility depends on application-specific current and thermal requirements.

Parameter Comparison

Engineering Selection Recommendations

The CLF7045NIT-221M-D presents a viable substitute for the obsolete ELL-8TP221MB based on the following engineering factors:

Compliance & Availability: The TDK component maintains active product status with 3176 units in stock, ensuring procurement continuity. Both components achieve ROHS3 compliance and MSL 1 rating, satisfying environmental and moisture handling requirements.

Current Rating Consideration: The CLF7045NIT-221M-D is rated for 560 mA continuous current, compared to the original 700 mA rating. Applications operating at or below 560 mA continuous current are directly compatible. Designs requiring the full 700 mA rating require circuit-level evaluation to determine if the reduced current rating impacts system performance.

DC Resistance Impact: The substitute exhibits 660 mOhm maximum DCR versus 480 mOhm for the original. This 180 mOhm increase results in proportionally higher resistive losses. Power dissipation calculations must account for this difference in applications sensitive to thermal performance.

Thermal Operating Range: The TDK component extends the upper operating temperature to 150°C, exceeding the original 105°C maximum. This provides enhanced thermal margin for applications operating near temperature limits.

Physical Footprint: The CLF7045NIT-221M-D occupies a slightly smaller footprint (7.40mm × 7.00mm versus 8.00mm × 8.00mm) with marginally reduced height (4.80mm versus 5.00mm). PCB layout compatibility must be verified for designs with tight component spacing.

Frequently Asked Questions (FAQ)

Q: Can the CLF7045NIT-221M-D directly replace the ELL-8TP221MB in all applications?

A: Direct substitution is valid for applications operating at 560 mA or below. Applications requiring the full 700 mA rating require circuit analysis. The increased DCR (660 mOhm vs. 480 mOhm) must be evaluated for thermal and efficiency impact.

Q: What is the significance of the different core types (wirewound vs. drum core wirewound)?

A: Both components employ wirewound construction with shielding. The TDK component uses a drum core geometry, which influences the magnetic field distribution and core loss characteristics. Both maintain the same 220 µH inductance value at 100 kHz test frequency.

Q: Are there package compatibility issues between these components?

A: The CLF7045NIT-221M-D has a smaller footprint (7.40mm × 7.00mm) compared to the original (8.00mm × 8.00mm). PCB layouts designed for the larger footprint can accommodate the smaller substitute. Layouts with minimal clearance must be verified for fit.

Q: How does the extended temperature range of the TDK component affect substitution?

A: The CLF7045NIT-221M-D operates from -55°C to 150°C, compared to -40°C to 105°C for the original. This provides additional thermal margin and enables use in wider temperature environments. No derating is required for applications within the original temperature range.

Q: What is the impact of the 180 mOhm DCR increase on circuit performance?

A: The higher DCR increases resistive losses proportionally to the square of the current. At 560 mA, the TDK component dissipates approximately 207 mW compared to 188 mW for the original at 700 mA. Thermal analysis is required for power-sensitive applications.

Q: Are both components RoHS and MSL compliant?

A: Yes. Both the ELL-8TP221MB and CLF7045NIT-221M-D are ROHS3 compliant with MSL 1 rating (unlimited moisture sensitivity level), meeting standard environmental and handling requirements.