74455115 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74455115 is a 15 µH unshielded drum core wirewound inductor rated for 1.1 A continuous current with a maximum DC resistance of 230 mOhm. This component is designed for surface mount applications in nonstandard package configurations and is currently in active production status. Equivalent parts are identified when electrical characteristics, mechanical dimensions, and environmental ratings align within specified tolerances, enabling direct substitution in circuit designs without performance degradation.

Substiute Parts

74455115

Würth ElektronikIn Stock: 177774455115 Datasheet

Current PartRFQ

P0770.153NLT

Pulse ElectronicsIn Stock: 7759P0770.153NLT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Pulse Electronics P0770.153NLT qualifies as an equivalent substitute for the Würth Elektronik 74455115 based on the following alignment of critical electrical and mechanical parameters:

Matching Electrical Characteristics:

• Inductance value: 15 µH at 100 kHz test frequency
• Inductance tolerance: ±20%
• DC resistance: 230 mOhm maximum
• Saturation current: 900 mA
• Unshielded wirewound construction

Matching Mechanical Specifications:

• Package dimensions: 6.60 mm × 4.45 mm (length × width)
• Height (seated maximum): 2.92 mm
• Surface mount configuration
• Nonstandard package classification

Matching Compliance & Environmental:

• RoHS3 compliance
• Moisture sensitivity level 1 (unlimited)
• REACH unaffected status
• ECCN EAR99 classification

The primary distinction is the current rating specification: the 74455115 is rated for 1.1 A continuous current, while the P0770.153NLT is rated for 900 mA. The saturation current of both parts is 900 mA, establishing the practical current limit. The operating temperature range of the substitute extends to 130°C versus 100°C for the main part, providing broader thermal capability.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (74455115): Select this Würth Elektronik component when the application requires the full 1.1 A continuous current rating and operates within the -40°C to 100°C temperature envelope. This part maintains active production status with established supply availability.

Substitute Part (P0770.153NLT): The Pulse Electronics equivalent is suitable for applications where the actual operating current does not exceed 900 mA continuous. This substitute provides extended thermal operating range to 130°C, beneficial for high-temperature environments. Both parts maintain identical RoHS3 and REACH compliance certifications, ensuring regulatory equivalence.

Selection Criteria: Substitution is valid when circuit design current requirements remain at or below 900 mA. The saturation current specification of 900 mA for both parts represents the practical maximum current before inductance degradation occurs. Verify that the application's thermal environment aligns with the selected part's operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the P0770.153NLT substitute for the 74455115 in all applications?

A: Substitution is valid when the circuit design operates at 900 mA or below. The 74455115 is rated for 1.1 A continuous current, while the P0770.153NLT is rated for 900 mA. Both parts saturate at 900 mA, making this the practical current limit for the substitute. Applications requiring sustained current above 900 mA require the primary part.

Q: Are the physical dimensions identical?

A: Yes. Both parts share identical package dimensions of 6.60 mm length × 4.45 mm width with 2.92 mm maximum seated height. Surface mount footprints are compatible, and both use tape and reel packaging.

Q: What is the difference in operating temperature ranges?

A: The 74455115 operates from -40°C to 100°C, while the P0770.153NLT extends to 130°C maximum. For applications in elevated temperature environments, the substitute provides broader thermal capability.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the 74455115 and P0770.153NLT are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Q: What does the ±20% inductance tolerance mean for substitution?

A: Both parts carry ±20% inductance tolerance, meaning the actual inductance value may vary between 12 µH and 18 µH. This tolerance applies equally to both the primary and substitute parts, ensuring equivalent performance variation in circuit applications.

Q: Is the DC resistance specification critical for substitution?

A: Yes. Both parts specify 230 mOhm maximum DC resistance at the test frequency of 100 kHz. This parameter directly affects power dissipation and thermal performance. Identical DCR specifications ensure equivalent thermal behavior in the circuit.

Q: Can I use the substitute if my application operates at exactly 900 mA?

A: Operation at 900 mA is at the saturation current limit for both parts. At this current level, inductance begins to degrade. For sustained operation at 900 mA, design margin analysis is required. For continuous operation above 900 mA, the primary 74455115 part is required.