FHC16322ADTP Equivalent & Substitute Parts

Part Overview

The FHC16322ADTP is a surface mount fuse chip manufactured by Kamaya Inc., rated for 3.15 A at 24 V DC with fast blow response characteristics. This component is designed for overcurrent protection in electronic circuits requiring compact 0603 (1608 Metric) package form factor. The part maintains active product status with full RoHS3 compliance and international safety certifications (CSA, cUL, UL). Substitute parts are identified to address application requirements including extended voltage ratings, alternative response times, or inventory availability while maintaining core electrical and mechanical compatibility.

Substiute Parts

FHC16322ADTP

Kamaya Inc.In Stock: 832FHC16322ADTP Datasheet

Current PartRFQ

SF-0603S315-2

Bourns Inc.In Stock: 18884SF-0603S315-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FHC16322ADTP are identified based on the following substitution criteria:

Mandatory Matching Parameters:

• Current Rating: 3.15 A (exact match required)
• Package / Case: 0603 (1608 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

Allowable Variation Parameters:

• Voltage Rating - DC: Substitutes with equal or higher ratings are acceptable (minimum 24 V)
• Response Time: Fast Blow or Slow Blow variants are functionally interchangeable depending on circuit protection strategy
• Breaking Capacity: Substitutes with equal or higher capacity are acceptable
• Approval Agencies: Substitutes must maintain recognized safety certifications (UL, cUL, CSA)

The substitute part SF-0603S315-2 meets all mandatory matching criteria and provides enhanced voltage rating (32 V vs. 24 V) and higher breaking capacity (50 A vs. 35 A), making it suitable for applications requiring additional safety margin.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (FHC16322ADTP): Select the FHC16322ADTP when the application requires fast blow response characteristics, extended operating temperature range (-55°C to 125°C), or when CSA and cUL certifications are mandatory regulatory requirements. This part is suitable for circuits requiring rapid fault detection and protection.

Substitute Part Selection (SF-0603S315-2): Select the SF-0603S315-2 when the application tolerates slow blow response time, operates within the -20°C to 105°C temperature range, and requires only UL certification. The higher voltage rating (32 V) and breaking capacity (50 A) provide additional safety margin for circuits with transient voltage spikes or higher fault current potential. The lower DC cold resistance (0.015 Ohms vs. 0.026 Ohms) results in reduced power dissipation during normal operation.

Both parts maintain identical current rating (3.15 A), package form factor (0603), and mounting type (surface mount), ensuring direct PCB footprint compatibility. Selection between these parts depends on circuit protection strategy (response time requirement) and regulatory certification scope rather than electrical or mechanical constraints.

Frequently Asked Questions (FAQ)

Q: Can SF-0603S315-2 be used as a direct replacement for FHC16322ADTP in all applications?

A: Direct replacement is possible from a physical and electrical standpoint due to matching current rating, package, and mounting type. However, the response time difference (slow blow vs. fast blow) must be evaluated against circuit protection requirements. Applications requiring fast fault detection may not tolerate the slower response characteristic of the substitute part.

Q: What is the significance of the voltage rating difference (24 V vs. 32 V)?

A: The FHC16322ADTP is rated for 24 V DC minimum, while SF-0603S315-2 is rated for 32 V DC. The substitute part can safely operate in 24 V circuits and provides additional voltage withstand capability. This is advantageous in circuits subject to transient overvoltage conditions or where voltage margin is desired.

Q: Are there certification differences between these parts?

A: Yes. The FHC16322ADTP carries CSA, cUL, and UL certifications, while SF-0603S315-2 carries only UL certification. Applications requiring CSA or cUL approval must use the primary part or identify alternative substitutes with matching certification scope.

Q: How does the operating temperature range affect part selection?

A: The FHC16322ADTP operates from -55°C to 125°C, while SF-0603S315-2 operates from -20°C to 105°C. Applications in extreme cold environments (below -20°C) or high temperature environments (above 105°C) require the primary part. Standard commercial and industrial applications typically operate within the SF-0603S315-2 range.

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

A: The SF-0603S315-2 has lower DC cold resistance (0.015 Ohms vs. 0.026 Ohms), resulting in approximately 42% less resistive power dissipation during normal circuit operation. This can be beneficial in power-sensitive applications or where thermal management is a concern.

Q: Are both parts available in the same packaging format?

A: Yes. Both parts are supplied in Tape & Reel (TR) packaging in 0603 (1608 Metric) form factor, ensuring compatibility with standard surface mount assembly processes and equipment.

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

A: Breaking capacity is the maximum fault current the fuse can safely interrupt. The FHC16322ADTP has 35 A breaking capacity, while SF-0603S315-2 has 50 A. Both exceed the 3.15 A rated current by significant margins. The substitute part provides additional safety margin in circuits with high fault current potential.