16R1100GF Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The 16R1100GF is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., part of the POLY-FUSE® 16R series. This through-hole radial disc component is rated for 16V maximum voltage with an 11A hold current (Ih) and 18.7A trip current (It). The device is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Voltage - Max	16V
Current - Hold (Ih) (Max)	11 A
Current - Trip (It)	18.7 A
Current - Max	100 A
Time to Trip	7 s
Resistance - Initial (Ri) (Min)	3.7 mOhms
Resistance - Post Trip (R1) (Max)	8.9 mOhms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Lead Spacing	0.201" (5.10mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 16R1100GF is determined by strict equivalence across the following critical parameters:

Voltage rating: 16V maximum
Hold current (Ih): 11A maximum
Trip current (It): 18.7A
Mounting configuration: Through hole radial disc
Lead spacing: 0.201" (5.10mm)
Operating temperature range: -40°C to 85°C
RoHS3 compliance

Three substitute parts meet these criteria and are grouped as follows:

MFR Recommended Substitute: RGEF1100 (Littelfuse PolySwitch® RGEF series) - Active product status with current manufacturing support.

Direct Manufacturer Equivalents: 0ZRA1100FF1A (Bel Fuse Inc. 0ZRA series) and MF-RG1100-0-14 (Bourns Inc. Multifuse® MF-RG series) - Both active products with identical electrical specifications.

Parameter Comparison

Parameter	16R1100GF	RGEF1100	0ZRA1100FF1A	MF-RG1100-0-14
Manufacturer	Littelfuse Inc.	Littelfuse	Bel Fuse Inc.	Bourns Inc.
Series	POLY-FUSE® 16R	PolySwitch® RGEF	0ZRA	Multifuse® MF-RG
Product Status	Obsolete	Active	Active	Active
Voltage - Max	16V	16V	16V	16V
Current - Hold (Ih) (Max)	11 A	11 A	11 A	11 A
Current - Trip (It)	18.7 A	18.7 A	18.7 A	18.7 A
Current - Max	100 A	100 A	100 A	100 A
Time to Trip	7 s	7 s	14.6 s	7 s
Resistance - Initial (Ri) (Min)	3.7 mOhms	3.7 mOhms	3 mOhms	3.7 mOhms
Resistance - Post Trip (R1) (Max)	8.9 mOhms	8.9 mOhms	10 mOhms	8.9 mOhms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc
Lead Spacing	0.201" (5.10mm)	0.199" (5.05mm)	0.201" (5.10mm)	0.201" (5.10mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	cURus, TUV	CSA, TUV, UL	cURus, TUV	cUL, cURus

Engineering Selection Recommendations

RGEF1100 is the primary recommended substitute. It is manufactured by Littelfuse, the original manufacturer of the 16R1100GF, and maintains active product status with current manufacturing support. This part carries expanded approval certifications (CSA, TUV, UL) and is available in standard packaging formats.

0ZRA1100FF1A (Bel Fuse Inc.) and MF-RG1100-0-14 (Bourns Inc.) are functionally equivalent alternatives. Both are active products with identical voltage, hold current, and trip current specifications. The 0ZRA1100FF1A includes AEC-Q200 automotive qualification. The MF-RG1100-0-14 also carries AEC-Q200 qualification and is available in bulk packaging.

All three substitute parts are ROHS3 compliant and operate across the same temperature range as the original 16R1100GF. Selection should be based on availability, packaging requirements, and any specific certification needs for the application.

Frequently Asked Questions (FAQ)

Q: Can RGEF1100 be used as a direct replacement for 16R1100GF?

A: Yes. RGEF1100 meets all critical electrical parameters: 16V voltage rating, 11A hold current, 18.7A trip current, and identical operating temperature range. The lead spacing differs by 0.002" (0.05mm), which is within typical PCB tolerance for through-hole radial components. Physical dimensions are comparable, with RGEF1100 being slightly smaller in length and width.

Q: What is the difference between the 7-second and 14.6-second trip times?

A: Trip time is the duration required for the PTC element to transition from normal to tripped state under overcurrent conditions. The 16R1100GF and most substitutes (RGEF1100, MF-RG1100-0-14) have a 7-second trip time. The 0ZRA1100FF1A has a 14.6-second trip time. This difference may affect circuit protection response in applications with strict timing requirements. Verify trip time compatibility with your circuit design before selection.

Q: Are there packaging differences between these parts?

A: Yes. The 16R1100GF is supplied in standard packaging (-). RGEF1100 is supplied in bags. 0ZRA1100FF1A is supplied in boxes. MF-RG1100-0-14 is supplied in bulk. Packaging does not affect electrical performance but may impact procurement, storage, and handling procedures.

Q: Which substitute has the best compliance certifications?

A: RGEF1100 carries the broadest certification set (CSA, TUV, UL). Both 0ZRA1100FF1A and MF-RG1100-0-14 include AEC-Q200 automotive qualification, which the original 16R1100GF does not list. Select based on your specific application requirements and regional compliance standards.

Q: Can I use 0ZRA1100FF1A if my circuit requires a 7-second trip time?

A: No. The 0ZRA1100FF1A has a 14.6-second trip time, which differs from the 7-second specification of the 16R1100GF. This variance may affect overcurrent protection timing. Use only if your circuit design accommodates the longer trip time, or select RGEF1100 or MF-RG1100-0-14 for identical trip time performance.

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