FHC32402ADTP Equivalent & Substitute Parts

Part Overview

The FHC32402ADTP is a 4 A, 32 V DC surface mount fuse in 1206 (3216 Metric) package manufactured by Kamaya Inc. This fast blow fuse is designed for board-level circuit protection in applications requiring rapid response to overcurrent conditions. The part is currently active in production with full inventory availability. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements necessitate alternative electrical or mechanical characteristics.

Substiute Parts

FHC32402ADTP

Kamaya Inc.In Stock: 1083FHC32402ADTP Datasheet

Current PartRFQ

SF-1206S400-2

Bourns Inc.In Stock: 110298SF-1206S400-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FHC32402ADTP are identified based on electrical and mechanical parameter compatibility. The following parameters must align for valid substitution:

Critical Matching Parameters:

• Current Rating: 4 A
• Voltage Rating (DC): 32 V
• Package / Case: 1206 (3216 Metric)
• Mounting Type: Surface Mount
• Breaking Capacity: 50 A @ Rated Voltage
• RoHS Compliance: ROHS3 Compliant

Variable Parameters (Application-Dependent):

• Response Time (Fast Blow vs. Slow Blow)
• Operating Temperature Range
• DC Cold Resistance
• Approval Agencies

The substitute part SF-1206S400-2 from Bourns Inc. meets all critical electrical and mechanical parameters. Differences in response time characteristics and operating temperature range reflect design variations that may be suitable depending on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

FHC32402ADTP (Kamaya Inc.) is the primary part specification and remains the first choice for applications requiring fast blow response characteristics and extended operating temperature range (-55°C ~ 125°C). This part carries CSA and UL approvals and is actively produced with substantial inventory availability.

SF-1206S400-2 (Bourns Inc.) serves as a direct electrical substitute for applications where slow blow response is acceptable or preferred. This part carries UL approval and is part of the SinglFuse™ SF-1206S series. The operating temperature range (-20°C ~ 105°C) is narrower than the primary part, and this difference must be evaluated against specific application thermal requirements. The lower DC cold resistance (0.014 Ohms vs. 0.019 Ohms) results in reduced resistive heating characteristics.

Both parts maintain ROHS3 compliance, REACH unaffected status, and identical current, voltage, and breaking capacity ratings. Selection between these parts depends on response time requirements and operating temperature constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can SF-1206S400-2 be used as a direct replacement for FHC32402ADTP?

A: SF-1206S400-2 is electrically and mechanically compatible for applications where slow blow response is acceptable. The critical parameters—current rating (4 A), voltage rating (32 V), package (1206), mounting type (surface mount), and breaking capacity (50 A)—are identical. However, the response time characteristic differs (slow blow vs. fast blow), and the operating temperature range is narrower (-20°C ~ 105°C vs. -55°C ~ 125°C). Verify that these differences align with application requirements before substitution.

Q: What is the significance of response time differences between these parts?

A: FHC32402ADTP is specified as fast blow, meaning it responds rapidly to overcurrent conditions. SF-1206S400-2 is specified as slow blow, which allows brief current surges to pass without interruption. Fast blow fuses are used in circuits sensitive to transient overcurrents, while slow blow fuses tolerate temporary inrush currents. Application circuit characteristics determine which response time is appropriate.

Q: Are both parts suitable for the same PCB layout?

A: Yes. Both parts use identical 1206 (3216 Metric) surface mount packages with matching footprints. Physical dimensions are similar (FHC32402ADTP: 3.20mm x 1.60mm x 0.65mm; SF-1206S400-2: 3.10mm x 1.55mm x 0.60mm), and both are compatible with standard 1206 PCB land patterns.

Q: What compliance certifications apply to each part?

A: FHC32402ADTP carries CSA and UL approvals. SF-1206S400-2 carries UL approval. Both parts are ROHS3 compliant and REACH unaffected. Verify that the specific approval agencies required by your application are present on the selected part.

Q: How do the DC cold resistance values affect circuit performance?

A: DC cold resistance (0.019 Ohms for FHC32402ADTP vs. 0.014 Ohms for SF-1206S400-2) contributes to resistive heating in the fuse element. The lower resistance of SF-1206S400-2 results in reduced power dissipation. For applications with tight thermal budgets or high continuous current operation near the 4 A rating, this difference may be significant.

Q: What is the operating temperature constraint for each part?

A: FHC32402ADTP operates across -55°C to 125°C, providing extended low-temperature and high-temperature capability. SF-1206S400-2 operates across -20°C to 105°C, which is narrower at both extremes. Applications requiring operation below -20°C or above 105°C must use FHC32402ADTP.