FCC16631ADTP Equivalent & Substitute Parts

Part Overview

The FCC16631ADTP is a surface mount fuse chip manufactured by Kamaya Inc., rated for 630 mA at 36 V DC with fast-blow response characteristics. This component is designed for circuit protection in compact 0603 (1608 Metric) package form factor. The part maintains active product status with full RoHS3 compliance and international approvals including CSA, cUL, and UL certification. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit operation within modified electrical parameters.

Substiute Parts

FCC16631ADTP

Kamaya Inc.In Stock: 975FCC16631ADTP Datasheet

Current PartRFQ

SF-0603S063-2

Bourns Inc.In Stock: 21791SF-0603S063-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FCC16631ADTP is determined by the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 630 mA (exact match required)
• Package / Case: 0603 (1608 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)

Allowable Parameter Variations:

• Voltage Rating - DC: The substitute part SF-0603S063-2 operates at 32 V DC, which is lower than the primary part's 36 V DC rating. This substitution is valid only in applications where the circuit voltage does not exceed 32 V DC.
• Response Time: The substitute part features slow-blow response, differing from the primary part's fast-blow characteristic. This variation affects circuit protection behavior and is acceptable only when slow-blow response meets application requirements.
• Operating Temperature Range: The substitute part operates within -20°C ~ 105°C, which is narrower than the primary part's -55°C ~ 125°C range. Substitution is valid only when the application operates within the substitute part's temperature limits.
• Breaking Capacity: The substitute part provides 50 A breaking capacity compared to the primary part's 35 A. This higher capacity does not restrict substitution.
• DC Cold Resistance: The substitute part exhibits 0.13 Ohms compared to the primary part's 0.28 Ohms. Lower resistance is acceptable for circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both the FCC16631ADTP and SF-0603S063-2 maintain active product status with full RoHS3 compliance and international regulatory approvals. The FCC16631ADTP carries CSA, cUL, and UL certifications, while the SF-0603S063-2 carries UL certification.

Selection between these parts depends on circuit voltage requirements and protection response characteristics:

Select FCC16631ADTP when:

• Circuit voltage reaches or exceeds 32 V DC and does not exceed 36 V DC
• Fast-blow response is required for circuit protection
• Operating temperature range extends below -20°C or above 105°C
• The application requires CSA or cUL certification

Select SF-0603S063-2 when:

• Circuit voltage does not exceed 32 V DC
• Slow-blow response is acceptable or required
• Operating temperature remains within -20°C ~ 105°C
• UL certification is sufficient for the application
• Lower DC cold resistance is beneficial for the circuit design

Both parts share identical current rating (630 mA) and package form factor (0603), ensuring mechanical and electrical compatibility at the component level within their respective voltage and temperature operating ranges.

Frequently Asked Questions (FAQ)

Q: Can SF-0603S063-2 be used as a direct replacement for FCC16631ADTP in all applications?

A: No. The SF-0603S063-2 has a lower DC voltage rating (32 V versus 36 V) and different response time (slow-blow versus fast-blow). Substitution is valid only when the circuit voltage does not exceed 32 V DC and slow-blow response meets protection requirements.

Q: What is the significance of the response time difference between fast-blow and slow-blow?

A: Fast-blow fuses interrupt circuits quickly upon overcurrent detection, providing immediate protection against transient surges. Slow-blow fuses tolerate temporary current spikes and interrupt only during sustained overcurrent conditions. The appropriate response type depends on the circuit's inrush current characteristics and protection objectives.

Q: Are both parts physically identical in the 0603 package?

A: Both parts use the 0603 (1608 Metric) surface mount package with identical length (0.063" / 1.60 mm) and height (0.018" / 0.45 mm). Width differs slightly (0.031" for FCC16631ADTP versus 0.032" for SF-0603S063-2), which does not affect PCB placement compatibility.

Q: What does the difference in DC cold resistance mean for circuit performance?

A: DC cold resistance affects voltage drop across the fuse during normal operation. The SF-0603S063-2 exhibits lower resistance (0.13 Ohms versus 0.28 Ohms), resulting in reduced voltage drop and heat generation. This characteristic is generally beneficial but does not restrict substitution eligibility.

Q: Which certifications apply to each part?

A: The FCC16631ADTP carries CSA, cUL, and UL approvals. The SF-0603S063-2 carries UL approval. Verify that the substitute part's certification meets your application's regulatory requirements before selection.

Q: Can the SF-0603S063-2 be used in applications requiring the full -55°C ~ 125°C temperature range?

A: No. The SF-0603S063-2 operates only within -20°C ~ 105°C. If your application requires operation outside this range, the FCC16631ADTP must be used.

Q: What is the breaking capacity and why does it matter?

A: Breaking capacity is the maximum current the fuse can safely interrupt without damage. The FCC16631ADTP provides 35 A breaking capacity, while the SF-0603S063-2 provides 50 A. Both values exceed the 630 mA rated current, ensuring safe operation. The higher breaking capacity of the substitute part does not restrict its use.