MLF2012C330MT Equivalent & Substitute Parts

Part Overview

The MLF2012C330MT is a 33 µH shielded multilayer inductor manufactured by TDK Corporation in 0805 (2012 Metric) surface mount package. This component is rated for 5 mA maximum current with 1.1 Ohm maximum DC resistance and operates across -55°C to 125°C. The part carries a "Not For New Designs" product status, indicating it has been superseded in TDK's current product portfolio. Identifying equivalent substitute parts is necessary for ongoing production support, legacy system maintenance, and design continuity where this inductor specification is required.

Key Parameters

Parameter	Value
Inductance	33 µH
Tolerance	±20%
Current Rating	5 mA
DC Resistance (Max)	1.1 Ohm
Shielding	Shielded
Package	0805 (2012 Metric)
Operating Temperature Range	-55°C to 125°C
Self Resonant Frequency	15 MHz
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MLF2012C330MT is determined by the following critical parameters:

Inductance value: 33 µH (exact match required)
Package type: 0805 (2012 Metric) surface mount (exact match required)
Current rating: 5 mA minimum (equal or higher acceptable)
DC resistance: 1.1 Ohm maximum (equal or lower acceptable)
Shielding type: Shielded (required for EMI performance)
Self resonant frequency: 15 MHz (equal or higher acceptable)
RoHS compliance: ROHS3 Compliant (required for regulatory conformance)

The MLF2012C330KT000 qualifies as a direct substitute based on matching inductance, package, current rating, DC resistance, shielding, and self resonant frequency specifications. Tolerance differences and operating temperature range variations do not preclude substitution when the electrical performance envelope remains within application requirements.

Parameter Comparison

Parameter	MLF2012C330MT	MLF2012C330KT000	Compatibility
Manufacturer	TDK Corporation	TDK Corporation	Match
Inductance	33 µH	33 µH	Match
Tolerance	±20%	±10%	Substitute tighter
Current Rating	5 mA	5 mA	Match
DC Resistance (Max)	1.1 Ohm	1.1 Ohm	Match
Shielding	Shielded	Shielded	Match
Package / Case	0805 (2012 Metric)	0805 (2012 Metric)	Match
Size / Dimension	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.079" L x 0.049" W (2.00mm x 1.25mm)	Match
Height - Seated (Max)	0.057" (1.45mm)	0.057" (1.45mm)	Match
Self Resonant Frequency	15 MHz	15 MHz	Match
Operating Temperature	-55°C to 125°C	-40°C to 85°C	Substitute narrower
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Match
Product Status	Not For New Designs	Active	Substitute active

Engineering Selection Recommendations

The MLF2012C330KT000 is the recommended substitute for the MLF2012C330MT based on the following factors:

The MLF2012C330MT carries "Not For New Designs" status, indicating TDK has transitioned this part to end-of-life. The MLF2012C330KT000 maintains active product status with TDK Corporation, ensuring continued availability and manufacturing support.

Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, satisfying regulatory and environmental requirements. The substitute part features tighter inductance tolerance (±10% versus ±20%), which provides improved consistency in production environments.

The operating temperature range of the substitute (-40°C to 85°C) is narrower than the original part (-55°C to 125°C). Applications requiring operation below -40°C or above 85°C must evaluate whether the substitute's temperature envelope is acceptable for the intended use case.

All critical electrical parameters—inductance, current rating, DC resistance, shielding, and self resonant frequency—are identical between the two parts, ensuring functional equivalence in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can MLF2012C330KT000 be used as a direct replacement for MLF2012C330MT in existing designs?

A: Yes, the MLF2012C330KT000 is electrically and mechanically compatible with the MLF2012C330MT. Both parts share identical inductance (33 µH), current rating (5 mA), DC resistance (1.1 Ohm max), package dimensions (0805/2012 Metric), and self resonant frequency (15 MHz). Verify that your application's operating temperature requirements fall within -40°C to 85°C, as the substitute has a narrower temperature range than the original part.

Q: What is the significance of the tolerance difference between ±20% and ±10%?

A: The MLF2012C330KT000 offers tighter inductance tolerance (±10%) compared to the MLF2012C330MT (±20%). This means the substitute part will have inductance values closer to the nominal 33 µH specification. For applications sensitive to inductance variation, the tighter tolerance of the substitute may provide improved circuit performance and reduced design margin requirements.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity levels (MSL 1 - Unlimited). No compliance or certification differences exist between the two parts.

Q: What does "Not For New Designs" mean for the MLF2012C330MT?

A: "Not For New Designs" indicates that TDK Corporation has discontinued this part for new product development. While existing inventory may remain available, the manufacturer recommends using the active substitute (MLF2012C330KT000) for new designs to ensure long-term supply chain stability and manufacturing support.

Q: Will the substitute part fit in the same PCB footprint?

A: Yes. Both the MLF2012C330MT and MLF2012C330KT000 use the 0805 (2012 Metric) surface mount package with identical dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm) and maximum seated height (0.057" / 1.45mm). No PCB layout modifications are required.

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