LHLP12NB681KB Equivalent & Substitute Parts

Part Overview

The LHLP12NB681KB is a 680 µH shielded inductor manufactured by Taiyo Yuden, rated for 580 mA continuous current with a maximum DC resistance of 1.1 Ohm. This through-hole component features a radial, vertical cylinder package and operates across a temperature range of -25°C to 105°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

LHLP12NB681KB

Taiyo YudenIn Stock: 1096LHLP12NB681KB Datasheet

Current PartRFQ

RCP1317NP-681L

Sumida America Components Inc.In Stock: 861RCP1317NP-681L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LHLP12NB681KB is determined by the following critical parameters:

Inductance Value: The substitute part must maintain 680 µH inductance to ensure circuit performance and frequency response characteristics remain unchanged.

Shielding Configuration: Both the main part and substitute must feature shielded construction to maintain electromagnetic compatibility and prevent interference in the target application.

Core Material: Ferrite core material is required to match thermal stability and frequency response characteristics.

Mounting Type: Through-hole mounting is mandatory for mechanical compatibility with existing PCB designs.

Package Geometry: Radial, vertical cylinder configuration ensures physical fit within the designated PCB footprint.

RoHS Compliance: ROHS3 compliance is required to meet environmental and regulatory standards.

The RCP1317NP-681L from Sumida America Components Inc. satisfies all substitution criteria while offering enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The RCP1317NP-681L is the qualified substitute for the obsolete LHLP12NB681KB based on the following engineering criteria:

Functional Equivalence: Both inductors maintain identical 680 µH inductance values with ferrite core construction and shielded configuration, ensuring circuit performance parity.

Compliance Status: The RCP1317NP-681L carries active product status with ROHS3 compliance certification, providing long-term availability and regulatory alignment.

Electrical Performance: The substitute part delivers superior electrical characteristics, including a 1 A current rating (versus 580 mA) and reduced DC resistance of 780 mOhm (versus 1.1 Ohm maximum), resulting in lower power dissipation and improved thermal performance.

Physical Compatibility: Both components utilize identical through-hole, radial vertical cylinder packaging. Dimensional variations (0.531" diameter and 0.689" height for the substitute versus 0.512" diameter and 0.630" height for the original) are within typical PCB layout tolerances for radial component placement.

Temperature Operating Range: The substitute operates across -40°C to 100°C, providing extended low-temperature performance while maintaining the upper temperature limit within acceptable margins for most applications.

Frequently Asked Questions (FAQ)

Q: Can the RCP1317NP-681L directly replace the LHLP12NB681KB in existing designs?

A: Yes. Both components share identical inductance values, shielded ferrite core construction, through-hole mounting, and radial vertical cylinder packaging. The substitute meets all functional substitution criteria.

Q: What are the dimensional differences between these inductors?

A: The RCP1317NP-681L has a slightly larger diameter (0.531" versus 0.512") and height (0.689" versus 0.630"). These variations are typical for radial component families and generally accommodate standard PCB layout spacing.

Q: Does the higher current rating of the RCP1317NP-681L affect circuit operation?

A: No. A higher current rating indicates the substitute can safely handle greater current loads without saturation. For applications requiring 580 mA or less, the substitute operates within its rated specifications with improved thermal margin.

Q: How do the DC resistance values compare?

A: The RCP1317NP-681L exhibits lower DC resistance (780 mOhm maximum) compared to the LHLP12NB681KB (1.1 Ohm maximum). This reduction decreases resistive losses and heat generation in the inductor.

Q: Are both parts RoHS compliant?

A: Yes. Both the LHLP12NB681KB and RCP1317NP-681L carry ROHS3 compliance certification, meeting environmental and regulatory requirements.

Q: What is the significance of the product status difference?

A: The LHLP12NB681KB is classified as obsolete, indicating discontinued manufacturing and limited availability. The RCP1317NP-681L maintains active product status, ensuring reliable long-term procurement and supply chain continuity.

Q: How do the inductance tolerances differ?

A: The LHLP12NB681KB specifies ±10% tolerance, while the RCP1317NP-681L specifies ±15%. Both tolerances fall within acceptable ranges for most inductor applications; however, designs requiring tighter inductance control should account for the wider tolerance of the substitute.

Q: What packaging format is the RCP1317NP-681L supplied in?

A: The RCP1317NP-681L is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. The LHLP12NB681KB packaging format is not specified in the available data.