NANOSMDC020F Equivalent & Substitute Parts

Part Overview

The NANOSMDC020F is a Polymeric PTC Resettable Fuse manufactured by Littelfuse Inc., rated for 24V maximum voltage with 200 mA hold current. This component is classified as Obsolete, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter tolerances for 1206 (3216 Metric) surface mount applications.

Key Parameters

Parameter	Value	Unit
Voltage - Max	24	V
Current - Hold (Ih) (Max)	200	mA
Current - Trip (It)	420	mA
Resistance - Initial (Ri) (Min)	650	mOhms
Mounting Type	Surface Mount	-
Package / Case	1206 (3216 Metric), Concave	-
Type	Polymeric	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the NANOSMDC020F is determined by the following critical parameters:

Voltage Rating: Maximum voltage must equal or exceed 24V
Current - Hold (Ih): Must equal 200 mA maximum
Package / Case: Must be 1206 (3216 Metric), Concave form factor
Mounting Type: Must be Surface Mount
Type: Must be Polymeric PTC Resettable Fuse
RoHS Compliance: Must maintain ROHS3 Compliant status

The identified substitute parts meet all mandatory electrical and mechanical parameters. Variations in Current - Trip (It), Resistance - Initial (Ri), and Time to Trip values remain within acceptable engineering tolerances for this product category and do not preclude functional equivalence.

Parameter Comparison

Parameter	NANOSMDC020F	NANOSMDC020F-2	MF-NSMF020-2
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Bourns Inc.
Product Status	Obsolete	Active	Active
Voltage - Max	24V	24V	24V
Current - Hold (Ih) (Max)	200 mA	200 mA	200 mA
Current - Trip (It)	420 mA	420 mA	460 mA
Current - Max	100 A	100 A	10 A
Time to Trip	100 ms	0.1 s	600 ms
Resistance - Initial (Ri) (Min)	650 mOhms	650 mOhms	600 mOhms
Resistance - Post Trip (R1) (Max)	-	3.1 Ohms	2.6 Ohms
Operating Temperature	-	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	1206 (3216 Metric), Concave	1206 (3216 Metric), Concave	1206 (3216 Metric), Concave
Size / Dimension	0.126" L x 0.063" W (3.20mm x 1.60mm)	0.126" L x 0.063" W (3.20mm x 1.59mm)	0.126" L x 0.063" W (3.20mm x 1.60mm)
Thickness (Max)	0.032" (0.82mm)	0.028" (0.70mm)	0.033" (0.85mm)
Approval Agency	CSA, TUV, UL	CSA, TUV, UL	cURus, TUV
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2A (4 Weeks)	2A (4 Weeks)	1 (Unlimited)

Engineering Selection Recommendations

NANOSMDC020F-2 (Littelfuse Inc.) is the primary direct substitute. This part maintains identical electrical specifications to the obsolete NANOSMDC020F while offering Active product status with full manufacturing support. It carries the same CSA, TUV, and UL approvals and is ROHS3 Compliant. The NANOSMDC020F-2 is available in higher inventory quantities (41,400 Pcs) with Cut Tape and Digi-Reel packaging options.

MF-NSMF020-2 (Bourns Inc.) is an alternative substitute manufactured by Bourns Inc. under the Multifuse® series. This part meets all critical electrical parameters and maintains ROHS3 compliance with cURus and TUV approvals. The MF-NSMF020-2 offers superior moisture sensitivity rating (MSL 1, Unlimited) compared to the Littelfuse alternatives. However, the Current - Max specification differs (10 A versus 100 A), which may affect suitability depending on application-specific requirements.

Frequently Asked Questions (FAQ)

Q: Can NANOSMDC020F-2 be used as a direct replacement for NANOSMDC020F?

A: Yes. The NANOSMDC020F-2 maintains identical voltage (24V), hold current (200 mA), trip current (420 mA), and initial resistance (650 mOhms) specifications. Both components use the same 1206 (3216 Metric) Concave package and Surface Mount configuration. The primary difference is product status: NANOSMDC020F-2 is Active with ongoing manufacturing support.

Q: What are the key differences between NANOSMDC020F-2 and MF-NSMF020-2?

A: Both parts share identical voltage (24V) and hold current (200 mA) ratings. The MF-NSMF020-2 has a slightly higher trip current (460 mA versus 420 mA) and lower initial resistance (600 mOhms versus 650 mOhms). The most significant difference is Current - Max: NANOSMDC020F-2 is rated 100 A while MF-NSMF020-2 is rated 10 A. Additionally, MF-NSMF020-2 offers superior moisture sensitivity (MSL 1, Unlimited versus MSL 2A, 4 Weeks).

Q: Are all substitute parts ROHS3 Compliant?

A: Yes. NANOSMDC020F-2 and MF-NSMF020-2 are both ROHS3 Compliant, maintaining regulatory equivalence with the obsolete NANOSMDC020F.

Q: What packaging options are available for substitute parts?

A: NANOSMDC020F-2 is supplied in Cut Tape (CT) and Digi-Reel® packaging. MF-NSMF020-2 is also available in Cut Tape (CT) and Digi-Reel® packaging. Both options support automated assembly processes.

Q: Do the substitute parts have the same physical dimensions?

A: All three parts use the 1206 (3216 Metric) Concave package. Length and width are identical (0.126" L x 0.063" W / 3.20mm x 1.60mm). Thickness varies slightly: NANOSMDC020F (0.032" / 0.82mm), NANOSMDC020F-2 (0.028" / 0.70mm), and MF-NSMF020-2 (0.033" / 0.85mm). These variations remain within standard PCB assembly tolerances.

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