ASPI-2010-3R3M-T Equivalent & Substitute Parts

Part Overview

The ASPI-2010-3R3M-T is a 3.3 µH shielded drum core wirewound inductor manufactured by Abracon LLC, designed for surface mount applications in compact form factors. This component operates at 980 mA rated current with a maximum DC resistance of 335 mOhm and is specified for operating temperatures from -40°C to 125°C. The part maintains Active product status and is fully RoHS3 compliant. Substitute parts are necessary when addressing inventory constraints, extended lead times, or when design requirements permit operation within the electrical and mechanical tolerances of alternative qualified inductors.

Key Parameters

Parameter	Value
Inductance	3.3 µH
Inductance Tolerance	±20%
Current Rating	980 mA
Current - Saturation (Isat)	1.05 A
DC Resistance (DCR) Max	335 mOhm
Core Material	Ferrite
Shielding	Shielded
Mounting Type	Surface Mount
Size / Dimension	0.079" L x 0.063" W (2.00mm x 1.60mm)
Height - Seated (Max)	0.039" (1.00mm)
Operating Temperature Range	-40°C ~ 125°C
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the ASPI-2010-3R3M-T are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Inductance value: 3.3 µH with ±20% tolerance
Core type: Ferrite, shielded drum core wirewound construction
Mounting: Surface mount, nonstandard package
Footprint dimensions: 2.00mm L x 1.60mm W
Inductance test frequency: 1 MHz

Electrical Compatibility Parameters:

Current rating must support the application's maximum current requirement
DC resistance must not exceed design thermal or efficiency limits
Saturation current must remain above the application's peak current
Operating temperature range must encompass the application environment

Mechanical Compatibility Parameters:

Height seated dimension must fit within PCB assembly constraints
Package type: Tape & Reel (TR) for automated assembly
RoHS3 compliance required for regulatory conformance

The substitute parts VLS201612ET-3R3M and VLS201612ET-3R3M-CA from TDK Corporation meet the core electrical and mechanical requirements while operating within the specified parameter tolerances.

Parameter Comparison

Parameter	ASPI-2010-3R3M-T (Abracon)	VLS201612ET-3R3M (TDK)	VLS201612ET-3R3M-CA (TDK)
Inductance	3.3 µH	3.3 µH	3.3 µH
Inductance Tolerance	±20%	±20%	±20%
Current Rating (Amps)	980 mA	790 mA	850 mA
Current - Saturation (Isat)	1.05 A	790 mA	790 mA
DC Resistance (DCR) Max	335 mOhm	357 mOhm	357 mOhm
Core Material	Ferrite	Ferrite	Ferrite
Shielding	Shielded	Shielded	Shielded
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size / Dimension	0.079" L x 0.063" W (2.00mm x 1.60mm)	0.079" L x 0.063" W (2.00mm x 1.60mm)	0.079" L x 0.063" W (2.00mm x 1.60mm)
Height - Seated (Max)	0.039" (1.00mm)	0.047" (1.20mm)	0.047" (1.20mm)
Operating Temperature Range	-40°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
Product Status	Active	Not For New Designs	Not For New Designs

Engineering Selection Recommendations

ASPI-2010-3R3M-T (Primary Selection)

The ASPI-2010-3R3M-T maintains Active product status and is the preferred choice for new designs. This part provides the highest current rating (980 mA) and saturation current (1.05 A) among the three options, along with the lowest DC resistance (335 mOhm). The extended operating temperature range (-40°C to 125°C) accommodates demanding thermal environments. RoHS3 compliance and REACH unaffected status satisfy regulatory requirements.

VLS201612ET-3R3M (Secondary Substitute)

The VLS201612ET-3R3M from TDK Corporation is designated "Not For New Designs" but remains available with substantial inventory (4,744 pcs). This part is suitable for legacy system support, field replacements, or applications where current requirements do not exceed 790 mA. The saturation current specification (790 mA) equals the rated current, requiring careful margin analysis. The increased height dimension (1.20mm vs. 1.00mm) must be evaluated against PCB assembly constraints. Operating temperature range is limited to -40°C to 105°C.

VLS201612ET-3R3M-CA (Secondary Substitute)

The VLS201612ET-3R3M-CA from TDK Corporation is designated "Not For New Designs" and provides an intermediate current rating (850 mA) between the other two options. This variant is suitable for applications requiring higher current capacity than the standard VLS201612ET-3R3M but lower than the primary ASPI-2010-3R3M-T. The same height and temperature range limitations apply. Inventory availability is 3,010 pcs.

Frequently Asked Questions (FAQ)

Q: Can VLS201612ET-3R3M or VLS201612ET-3R3M-CA be used in place of ASPI-2010-3R3M-T in new designs?

A: No. Both TDK substitutes carry "Not For New Designs" status. New designs must use ASPI-2010-3R3M-T. The TDK parts are qualified only for legacy system support or field replacements where design changes are not feasible.

Q: What are the current rating differences, and how do they affect substitution?

A: The ASPI-2010-3R3M-T is rated for 980 mA with 1.05 A saturation current. VLS201612ET-3R3M is rated for 790 mA with 790 mA saturation current. VLS201612ET-3R3M-CA is rated for 850 mA with 790 mA saturation current. Substitution is only valid if the application's maximum current requirement does not exceed the substitute part's current rating and saturation current specifications.

Q: How do the DC resistance values compare?

A: ASPI-2010-3R3M-T specifies 335 mOhm maximum DC resistance. Both TDK substitutes specify 357 mOhm maximum. The 22 mOhm difference may impact thermal performance and efficiency in current-limited applications. Thermal analysis is required if power dissipation is a design constraint.

Q: Are there height dimension concerns with the TDK substitutes?

A: Yes. ASPI-2010-3R3M-T has a maximum seated height of 0.039" (1.00mm), while both TDK substitutes are 0.047" (1.20mm). This 0.20mm increase must be evaluated against PCB assembly clearances, component stacking, and conformal coating processes.

Q: What is the impact of the reduced operating temperature range in TDK substitutes?

A: ASPI-2010-3R3M-T operates from -40°C to 125°C. Both TDK substitutes operate from -40°C to 105°C. Applications requiring operation above 105°C cannot use the TDK substitutes. The 20°C reduction in maximum temperature may affect reliability in high-temperature environments.

Q: Are all three parts RoHS3 compliant?

A: Yes. ASPI-2010-3R3M-T, VLS201612ET-3R3M, and VLS201612ET-3R3M-CA are all RoHS3 compliant and REACH unaffected, satisfying regulatory requirements for EU and similar markets.

Q: What is the significance of the "Not For New Designs" status?

A: "Not For New Designs" indicates that the manufacturer (TDK) is not recommending these parts for new product development. These parts may have limited long-term availability, reduced design support, or planned obsolescence. They are suitable only for sustaining production of existing products or field service replacements.

Q: Can inductance tolerance affect substitution decisions?

A: All three parts specify ±20% inductance tolerance at 1 MHz. This tolerance is identical across all options and does not differentiate substitution suitability. Circuit designs must account for this tolerance range regardless of which part is selected.

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