AGRF700 Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The AGRF700 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., rated for 16V maximum voltage and 7A hold current. This component is designed for overcurrent protection in electronic circuits, automatically resetting after a fault condition is cleared. The part is currently in active production status with 1396 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Max	16	V
Current - Hold (Ih) (Max)	7	A
Current - Trip (It)	13.2	A
Current - Max	100	A
Time to Trip	4	s
Resistance - Initial (Ri) (Min)	6.6	mOhms
Resistance - Post Trip (R1) (Max)	20	mOhms
Operating Temperature Range	-40 to 85	°C
Mounting Type	Through Hole	—
Package / Case	Radial, Disc	—
Size / Dimension	11.20 x 3.00	mm
Height - Seated (Max)	21.00	mm
Lead Spacing	5.05	mm
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

The 16R700GMR qualifies as a direct substitute for the AGRF700 based on the following critical parameters:

Voltage rating: Both rated at 16V maximum
Hold current (Ih): Both rated at 7A maximum
Maximum current: Both rated at 100A
Post-trip resistance: Both maintain 20 mOhms maximum
Operating temperature range: Both operate across -40°C to 85°C
Mechanical compatibility: Identical radial disc package, through-hole mounting, matching lead spacing (5.05mm vs 5.10mm)
Compliance: Both ROHS3 compliant

Minor variations in trip current (13.2A vs 11.9A) and time to trip (4s vs 4.6s) remain within acceptable tolerance for polymeric PTC fuse operation. Initial resistance differs slightly (6.6 mOhms vs 7.7 mOhms) but both values fall within standard manufacturing ranges for this device class.

Parameter Comparison

Parameter	AGRF700	16R700GMR	Unit
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	—
Series	PolySwitch®, AGRF	POLY-FUSE®, 16R	—
Product Status	Active	Active	—
Type	Polymeric	Polymeric	—
Voltage - Max	16	16	V
Current - Hold (Ih) (Max)	7	7	A
Current - Trip (It)	13.2	11.9	A
Current - Max	100	100	A
Time to Trip	4	4.6	s
Resistance - Initial (Ri) (Min)	6.6	7.7	mOhms
Resistance - Post Trip (R1) (Max)	20	20	mOhms
Operating Temperature	-40 to 85	-40 to 85	°C
Mounting Type	Through Hole	Through Hole	—
Package / Case	Radial, Disc	Radial, Disc	—
Size / Dimension	11.20 x 3.00	11.20 x 3.00	mm
Height - Seated (Max)	21.00	19.70	mm
Lead Spacing	5.05	5.10	mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—
Approval Agency	—	cURus, TUV	—

Engineering Selection Recommendations

Both the AGRF700 and 16R700GMR are active production components from Littelfuse Inc. and maintain ROHS3 compliance. The 16R700GMR carries additional third-party certifications (cURus, TUV) and is available in cut tape packaging, which may provide advantages for automated assembly environments. The AGRF700 is supplied in bag packaging and currently maintains higher inventory levels (1396 units vs 1566 units).

Selection between these parts should be based on packaging requirements, lead time availability, and any specific certification mandates within the application. Both components are electrically and mechanically compatible for direct substitution in 16V, 7A polymeric PTC fuse applications.

Frequently Asked Questions (FAQ)

Q: Can the 16R700GMR replace the AGRF700 in existing designs?

A: Yes. Both components share identical voltage and hold current ratings, matching mechanical dimensions, and compatible thermal operating ranges. The minor differences in trip current and time to trip fall within normal polymeric PTC fuse performance variation.

Q: What is the significance of the different trip current values (13.2A vs 11.9A)?

A: Trip current defines the threshold at which the fuse transitions to high-resistance state. The 16R700GMR trips at a lower threshold, providing slightly faster fault response. Both values are within the specified 7A hold current envelope and do not affect basic substitutability.

Q: Are there packaging differences between these parts?

A: Yes. The AGRF700 is supplied in bag packaging, while the 16R700GMR is supplied in cut tape. Cut tape packaging is preferred for automated pick-and-place assembly. Bag packaging is suitable for manual assembly and reel-based operations.

Q: Do the certifications differ between these parts?

A: The 16R700GMR carries cURus and TUV approvals, while the AGRF700 does not list specific approval agencies. Both are ROHS3 compliant. If application requirements mandate specific third-party certifications, the 16R700GMR is the appropriate selection.

Q: What is the impact of the 1.3mm height difference?

A: The AGRF700 seated height is 21.00mm while the 16R700GMR is 19.70mm. This 1.3mm difference is negligible for most PCB layouts and does not affect electrical performance or mechanical fit in standard through-hole applications.

Q: Can these parts be used interchangeably in production?

A: Yes, provided that packaging format and any certification requirements are compatible with the application. Both components are active production items with stable supply availability.

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