SDH2812-1R5-R Equivalent & Substitute Parts

Part Overview

The SDH2812-1R5-R is a 1.5 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 1.33 A continuous current with a maximum DC resistance of 102 mOhm and operates across the temperature range of -40°C to 125°C. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

SDH2812-1R5-R

Eaton - Electronics DivisionIn Stock: 1151SDH2812-1R5-R Datasheet

Current PartRFQ

ASPI-0312FS-1R5N-T2

Abracon LLCIn Stock: 683ASPI-0312FS-1R5N-T2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete SDH2812-1R5-R is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Inductance value: 1.5 µH with ±30% tolerance
• Inductance test frequency: 100 kHz
• Core type: Ferrite drum core, shielded construction
• Mounting: Surface mount technology
• Package classification: Nonstandard form factor

Secondary Compatibility Parameters:

• Current rating must meet or exceed 1.33 A
• DC resistance must not exceed 102 mOhm
• Saturation current (Isat) must support circuit operating conditions
• Operating temperature range must encompass or match the original specification
• Physical dimensions must accommodate existing PCB layouts

The ASPI-0312FS-1R5N-T2 from Abracon LLC satisfies all primary equivalence criteria and maintains compatibility across secondary parameters with specific trade-offs noted in the comparison table below.

Parameter Comparison

Engineering Selection Recommendations

The ASPI-0312FS-1R5N-T2 from Abracon LLC is the identified substitute for the obsolete SDH2812-1R5-R. Selection of this substitute is supported by the following engineering factors:

Product Status: The substitute is in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Electrical Equivalence: Both components share identical inductance values (1.5 µH) and tolerance specifications (±30%), with inductance measurements performed at the same test frequency (100 kHz). The substitute provides a lower DC resistance (60 mOhm versus 102 mOhm maximum), which reduces power dissipation in the circuit.

Current Handling: The substitute is rated for 1.4 A continuous current, exceeding the original 1.33 A specification. However, the saturation current (Isat) of the substitute (1.36 A) is lower than the original (1.71 A). Circuit designs operating near saturation limits require evaluation to confirm the substitute remains within acceptable operating margins.

Compliance and Certifications: The substitute carries ROHS3 compliance and REACH unaffected status, meeting modern regulatory requirements. The original part status information does not include equivalent compliance documentation.

Temperature Operating Range: The substitute operates across -25°C to 120°C, which is narrower than the original -40°C to 125°C range. Applications requiring operation at temperatures below -25°C or above 120°C must be evaluated for compatibility.

Physical Compatibility: Both components maintain identical height (1.20 mm) and length (3.00 mm). The substitute width is 3.00 mm compared to the original 2.80 mm, representing a 0.20 mm increase. PCB layout verification is required to confirm this dimensional variance does not create placement conflicts.

Frequently Asked Questions (FAQ)

Q: Can the ASPI-0312FS-1R5N-T2 be used as a direct replacement for the SDH2812-1R5-R?

A: The ASPI-0312FS-1R5N-T2 is electrically equivalent in inductance value and tolerance. Direct substitution is possible for most applications. However, three factors require circuit-level evaluation: (1) the lower saturation current (1.36 A versus 1.71 A) must not compromise circuit performance under peak current conditions, (2) the narrower operating temperature range (-25°C to 120°C versus -40°C to 125°C) must accommodate the application environment, and (3) the slightly larger width (3.00 mm versus 2.80 mm) must fit within PCB layout constraints.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The substitute ASPI-0312FS-1R5N-T2 has a DC resistance of 60 mOhm compared to the original 102 mOhm maximum. Lower DC resistance reduces resistive losses and heat generation during operation. This is a beneficial characteristic that improves efficiency. No circuit redesign is required to accommodate this parameter difference.

Q: Why is the saturation current lower in the substitute?

A: The saturation current (Isat) specification indicates the current level at which the inductor's inductance begins to degrade due to core saturation. The substitute's Isat of 1.36 A is lower than the original 1.71 A. For circuits operating with peak currents below 1.36 A, this difference is not significant. Circuits designed to operate near or above 1.36 A require verification that the substitute's saturation characteristics remain acceptable for the application.

Q: Does the temperature range difference affect substitution suitability?

A: The substitute operates from -25°C to 120°C, while the original operates from -40°C to 125°C. If the application requires operation below -25°C or above 120°C, the substitute is not suitable. For applications within the -25°C to 120°C window, the substitute is fully compatible. Environmental and thermal analysis of the specific application determines whether the narrower range presents a limitation.

Q: What is the impact of the physical size difference?

A: The substitute is 3.00 mm wide compared to the original 2.80 mm width, a difference of 0.20 mm. Height and length remain identical. This dimensional variance is minor but must be verified against PCB layout artwork to confirm no placement conflicts exist with adjacent components or board features. Standard PCB design tools can quickly validate this compatibility.

Q: Why is the substitute packaged in Tape & Reel format while the original shows nonstandard packaging?

A: The substitute ASPI-0312FS-1R5N-T2 is supplied in standard Tape & Reel (TR) format, which is the industry standard for surface mount components and facilitates automated assembly. The original part's nonstandard packaging designation reflects its obsolete status and limited availability. Tape & Reel packaging is compatible with standard pick-and-place assembly equipment and represents an improvement in manufacturing efficiency.

Q: Are there any compliance or regulatory differences between the two parts?

A: The substitute carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic components. The original part's compliance status is not documented in the available specifications. For applications subject to ROHS or REACH regulations, the substitute's documented compliance status is advantageous.