ELL-8TP151MB Equivalent & Substitute Parts

Part Overview

The ELL-8TP151MB is a 150 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, designed for surface mount applications with a rated current of 800 mA and DC resistance of 340mOhm. This component operates across the temperature range of -40°C to 105°C and is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, identifying equivalent substitute parts is essential for ongoing design support and production continuity.

Substiute Parts

ELL-8TP151MB

Panasonic Electronic ComponentsIn Stock: 888ELL-8TP151MB Datasheet

Current PartRFQ

74404084151

Würth ElektronikIn Stock: 891574404084151 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELL-8TP151MB is determined by the following critical parameters:

• Inductance Value: Must be 150 µH with ±20% tolerance
• Current Rating: Minimum 800 mA to support the original design current
• DC Resistance: Should remain within acceptable limits for power loss calculations (original: 340mOhm)
• Mounting Type: Surface mount configuration required
• Package Footprint: 8.00mm x 8.00mm physical dimensions
• Shielding: Shielded or semi-shielded construction acceptable for EMI control
• Temperature Range: Must support -40°C to 105°C minimum
• RoHS Compliance: ROHS3 compliant status required

The Würth Elektronik 74404084151 meets these substitution criteria with equivalent inductance, superior current rating, and compatible physical dimensions.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 74404084151 is a direct functional substitute for the obsolete ELL-8TP151MB. Both components maintain identical inductance values and tolerance specifications. The substitute provides superior electrical performance with 910 mA current rating versus 800 mA, and higher saturation current of 1.25A compared to 700mA. The extended operating temperature range of -40°C to 125°C exceeds the original specification.

The primary design consideration is the increased DC resistance of 478mOhm versus 340mOhm, which results in approximately 41% higher resistive losses. Applications sensitive to power dissipation must evaluate this parameter against thermal and efficiency requirements. The substitute's semi-shielded construction versus full shielding may affect EMI performance in sensitive applications; however, both components share identical footprint dimensions and MSL ratings.

The Würth Elektronik part carries AEC-Q200 automotive qualification and active product status, ensuring long-term availability and supply chain stability compared to the obsolete Panasonic component.

Frequently Asked Questions (FAQ)

Q: Can the 74404084151 be used as a direct replacement without PCB modifications?

A: Yes. Both components share identical footprint dimensions of 8.00mm x 8.00mm and surface mount configuration. The substitute is 0.80mm shorter in seated height (4.20mm vs 5.00mm), which presents no clearance issues in standard applications.

Q: What is the impact of the higher DC resistance in the substitute part?

A: The 74404084151 exhibits 478mOhm DCR compared to 340mOhm in the original part. This 138mOhm difference increases resistive power loss proportionally to the square of the current. At 800 mA operation, the additional loss is approximately 86 mW. Thermal analysis is required for applications with strict power budget constraints.

Q: Are there shielding differences between the parts?

A: The ELL-8TP151MB is fully shielded, while the 74404084151 is semi-shielded. Shielding effectiveness differs; applications requiring maximum EMI attenuation should evaluate the specific shielding performance characteristics against circuit requirements.

Q: Does the extended temperature range of the substitute affect compatibility?

A: The substitute's -40°C to 125°C range exceeds the original -40°C to 105°C specification. This provides additional thermal margin and is compatible with all applications designed for the original part's temperature range.

Q: What certifications does the substitute carry?

A: The 74404084151 is AEC-Q200 qualified and ROHS3 compliant. Both components carry MSL 1 (Unlimited) moisture sensitivity ratings, indicating equivalent handling requirements.