AGRF1400 Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The AGRF1400 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., rated for 16V maximum voltage and 14A 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 968 units in stock. Finding equivalent substitute parts is necessary to ensure supply chain flexibility, optimize inventory management, and maintain design compatibility across manufacturing batches or alternative sourcing scenarios.

Substiute Parts

AGRF1400

Littelfuse Inc.In Stock: 1005AGRF1400 Datasheet

Current PartRFQ

16R1400GH

Littelfuse Inc.In Stock: 1216216R1400GH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The AGRF1400 has one identified substitute part: 16R1400GH, also manufactured by Littelfuse Inc. Substitution eligibility is determined by the following critical parameters:

• Maximum voltage rating: 16V (both parts match)
• Hold current (Ih): 14A (both parts match)
• Mounting type: Through Hole (both parts match)
• Package configuration: Radial, Disc (both parts match)
• Physical dimensions: 0.925" L x 0.138" W (both parts match)
• Lead spacing: 0.400" nominal (both parts within tolerance)
• Operating temperature range: -40°C ~ 85°C (both parts match)
• RoHS compliance: ROHS3 Compliant (both parts match)

The 16R1400GH operates within the same electrical and mechanical envelope as the AGRF1400, making it a direct functional substitute for circuit protection applications requiring identical voltage and current ratings.

Parameter Comparison

Engineering Selection Recommendations

Both the AGRF1400 and 16R1400GH are active production components from Littelfuse Inc. and maintain full ROHS3 compliance. The 16R1400GH offers additional third-party certifications (cURus, TUV) and higher inventory availability (12,083 units versus 968 units), making it advantageous for high-volume procurement scenarios.

The primary electrical difference is the trip current specification: the 16R1400GH trips at 23.8A compared to the AGRF1400's 27.3A. This lower trip threshold in the 16R1400GH provides more sensitive overcurrent protection. Initial resistance is marginally higher in the 16R1400GH (2.6 mOhms versus 2.2 mOhms), and seated height is slightly lower (27.90mm versus 28.70mm). These variations remain within acceptable mechanical and electrical tolerances for direct substitution in standard through-hole PCB applications.

Selection between these parts should be based on specific circuit protection requirements, inventory availability, and certification needs for the target application.

Frequently Asked Questions (FAQ)

Q: Can the 16R1400GH directly replace the AGRF1400 in existing designs?

A: Yes. Both parts share identical voltage ratings (16V), hold current (14A), mounting type (Through Hole), package configuration (Radial, Disc), and physical dimensions (0.925" L x 0.138" W). Lead spacing is within tolerance (0.400" versus 0.402"). PCB layouts designed for the AGRF1400 will accommodate the 16R1400GH without modification.

Q: What is the significance of the different trip current values?

A: The AGRF1400 trips at 27.3A while the 16R1400GH trips at 23.8A. This means the 16R1400GH will activate overcurrent protection at a lower threshold. Circuit designers must evaluate whether this difference aligns with the intended protection strategy. If the original design specifically requires the 27.3A trip point, the AGRF1400 is the appropriate choice.

Q: Are there compliance or certification differences?

A: The 16R1400GH carries cURus and TUV certifications, while the AGRF1400 does not list specific approval agencies. Both parts are ROHS3 compliant and active production status. Applications requiring specific third-party certifications should specify the 16R1400GH.

Q: How do the resistance specifications compare?

A: Initial resistance (Ri) is 2.2 mOhms for the AGRF1400 and 2.6 mOhms for the 16R1400GH. Post-trip resistance (R1) is identical at 6.4 mOhms for both parts. The slight difference in initial resistance is negligible for most circuit protection applications.

Q: What packaging differences exist between these parts?

A: The AGRF1400 is supplied in Bag packaging, while the 16R1400GH is supplied in Bulk packaging. This distinction affects procurement and handling but does not impact electrical or mechanical performance.

Q: Which part should be selected for new designs?

A: Selection depends on application-specific requirements. The 16R1400GH offers higher inventory availability and additional certifications. The AGRF1400 provides the higher trip current threshold (27.3A). Both are active production components suitable for new designs; the choice should align with protection requirements and supply chain strategy.