TR/3216FF-2A Surface Mount Fuse Board Mount Equivalent & Substitute Parts

Part Overview

The TR/3216FF-2A is a 2 A, 32 V AC / 63 V DC surface mount board mount fuse manufactured by Eaton - Electronics Division in the 1206 (3216 Metric) package. This component is classified as obsolete product status. Due to its obsolete designation, locating direct inventory from the original manufacturer may present supply chain challenges. Equivalent and substitute parts with active product status are available from alternative manufacturers while maintaining electrical and mechanical compatibility within specified parameters.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating - AC	32 V
Voltage Rating - DC	63 V
Response Time	Fast Blow
Package / Case	1206 (3216 Metric)
Mounting Type	Surface Mount
Fuse Type	Board Mount (Cartridge Style Excluded)
Operating Temperature Range	-55°C ~ 125°C
Breaking Capacity @ Rated Voltage	50 A
Approval Agencies	CSA, UL

Substitute Part Grouping Explanation

Substitution eligibility for the TR/3216FF-2A is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Current Rating: 2 A (exact match required)
Voltage Rating - DC: 63 V (exact match required)
Package / Case: 1206 (3216 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)
Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
Response Time: Fast Blow (exact match required)

Allowable Variation Parameters:

Voltage Rating - AC: May exceed 32 V (higher voltage rating provides backward compatibility in AC applications)
Operating Temperature Range: May exceed -55°C ~ 125°C (wider range provides enhanced capability)
Breaking Capacity: May equal or exceed 50 A
Melting I²t: Variation permitted within fast blow classification
DC Cold Resistance: Minor variation permitted
RoHS Status: Active product status preferred; RoHS3 compliance preferred for new designs
Approval Agencies: CSA and/or UL required; additional certifications acceptable

Substitute Categories:

Direct Equivalent: TR/3216FF2-R (Eaton - Electronics Division) - Identical electrical specifications with active product status and improved RoHS compliance.

Compatible Substitutes: C1Q 2 (Bel Fuse Inc.) and 0437002.WR / 0437002.WRA (Littelfuse Inc.) - Meet all mandatory parameters with enhanced AC voltage ratings and active product status.

Parameter Comparison

Parameter	TR/3216FF-2A (Main)	TR/3216FF2-R	C1Q 2	0437002.WR	0437002.WRA
Manufacturer	Eaton	Eaton	Bel Fuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (A)	2	2	2	2	2
Voltage Rating - AC (V)	32	32	125	63	63
Voltage Rating - DC (V)	63	63	63	63	63
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow	Fast Blow
Package / Case	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Breaking Capacity @ Rated Voltage	50 A	50 A	100 A AC / 50 A DC	50 A	50 A
Melting I²t	0.116	0.126	0.005	0.144	0.197
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 150°C	-55°C ~ 150°C
DC Cold Resistance (Ohms)	0.066	0.066	0.054	0.058	Not specified
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active
Approval Agencies	CSA, UL	CSA, UL	CE, CSA, cULus	CSA, UR	CSA, cURus

Engineering Selection Recommendations

TR/3216FF2-R (Eaton - Electronics Division) is the primary direct equivalent. This part maintains identical electrical specifications (2 A, 32 V AC, 63 V DC) and mechanical form factor as the TR/3216FF-2A while offering active product status and ROHS3 compliance. Selection of TR/3216FF2-R is appropriate for applications requiring continuity with the original design specification and Eaton component ecosystem.

0437002.WR (Littelfuse Inc.) provides an upgrade path with enhanced AC voltage rating (63 V AC versus 32 V AC) and extended operating temperature range (-55°C ~ 150°C). This part is suitable for applications where higher AC voltage margin or elevated temperature operation is beneficial. Breaking capacity and melting I²t characteristics remain within fast blow classification.

0437002.WRA (Littelfuse Inc.) offers similar upgrade characteristics to 0437002.WR with extended operating temperature capability. This variant is available with active product status and ROHS3 compliance.

C1Q 2 (Bel Fuse Inc.) provides the highest AC voltage rating (125 V AC) and enhanced breaking capacity (100 A AC). This part is suitable for applications requiring maximum voltage margin in AC circuits. The significantly lower melting I²t value (0.005) indicates faster response characteristics within the fast blow category.

All substitute parts carry active product status and ROHS3 compliance, addressing supply chain sustainability and regulatory requirements compared to the obsolete TR/3216FF-2A.

Frequently Asked Questions (FAQ)

Q: Can TR/3216FF2-R directly replace TR/3216FF-2A in existing designs?

A: Yes. TR/3216FF2-R maintains identical electrical ratings (2 A, 32 V AC, 63 V DC), mechanical package (1206 / 3216 Metric), and mounting type (surface mount). The primary difference is product status (active versus obsolete) and RoHS compliance improvement. No circuit redesign is required.

Q: What is the difference between the Littelfuse 0437002.WR and 0437002.WRA parts?

A: Both parts share identical electrical specifications (2 A, 63 V AC, 63 V DC) and mechanical form factor. The primary differences are melting I²t values (0.144 versus 0.197) and approval agency certifications (CSA/UR versus CSA/cURus). Selection between these variants depends on specific certification requirements for the application.

Q: Why does C1Q 2 have a lower melting I²t value (0.005) compared to other substitutes?

A: Melting I²t is a characteristic of fuse element design and material composition. The C1Q 2 exhibits faster thermal response within the fast blow classification. This does not indicate incompatibility; rather, it reflects different fuse element engineering. Compatibility is determined by current rating, voltage ratings, response time classification, and package form factor, all of which are identical across substitutes.

Q: Can I use 0437002.WR or 0437002.WRA in a 32 V AC circuit?

A: Yes. These parts are rated for 63 V AC, which exceeds the 32 V AC requirement of the original circuit. Higher voltage rating provides backward compatibility and additional safety margin in AC applications. No circuit modification is required.

Q: Are all substitute parts available in the same packaging options?

A: Packaging availability varies by manufacturer and distributor. TR/3216FF2-R is available in Cut Tape (CT) and Digi-Reel packaging. C1Q 2, 0437002.WR, and 0437002.WRA are available in Tape & Reel (TR) packaging. Verify packaging availability with your component supplier for production requirements.

Q: Which substitute part should I select for new designs?

A: For new designs, TR/3216FF2-R (direct Eaton equivalent) is appropriate if design specifications require 32 V AC rating. For applications benefiting from higher voltage margin, 0437002.WR or 0437002.WRA (Littelfuse) provide 63 V AC rating with extended temperature range. C1Q 2 (Bel Fuse) offers maximum AC voltage rating (125 V AC) for applications requiring highest voltage margin. All substitutes carry active product status and ROHS3 compliance suitable for current manufacturing standards.

Q: What certifications do these parts carry?

A: TR/3216FF-2A and TR/3216FF2-R carry CSA and UL certifications. C1Q 2 carries CE, CSA, and cULus certifications. 0437002.WR carries CSA and UR certifications. 0437002.WRA carries CSA and cURus certifications. Verify certification alignment with your application and regional requirements.

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