5SFP 1.6-R Equivalent & Substitute Parts

Part Overview

The 5SFP 1.6-R is a 1.6 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm through-hole axial package. This component is actively produced and widely used in circuit protection applications requiring fast response characteristics. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in compatible designs.

Substiute Parts

5SFP 1.6-R

Bel Fuse Inc.In Stock: 20985SFP 1.6-R Datasheet

Current PartRFQ

021701.6MXEP

Littelfuse Inc.In Stock: 1817021701.6MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 021701.6MXEP (Littelfuse Inc., Series 217) qualifies as a direct substitute for the 5SFP 1.6-R based on the following critical parameters:

• Current Rating: 1.6 A (identical)
• Voltage Rating (AC): 250 V (identical)
• Fuse Type: Cartridge, Glass (identical)
• Response Time: Fast Blow (identical)
• Mounting Type: Through Hole (identical)
• Breaking Capacity @ Rated Voltage: 35 A (identical)
• Operating Temperature Range: -55°C ~ 125°C (identical)
• RoHS Status: ROHS3 Compliant (identical)

Both parts meet international approval standards including CE, CSA, SEMKO, and VDE certifications. Physical dimensions are within acceptable tolerance for through-hole mounting applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 5SFP 1.6-R and 021701.6MXEP are active production components with equivalent electrical and mechanical specifications. Selection between these parts is based on:

• Availability: Both parts maintain active inventory (2031 pcs and 1754 pcs respectively)
• Certifications: Both hold CE, CSA, SEMKO, and VDE approvals; the 021701.6MXEP additionally carries K-MARK, PSE, and UL certifications
• Thermal Performance: Both operate across -55°C to 125°C
• Compliance: Both are ROHS3 compliant and REACH unaffected

Minor variations in DC cold resistance (0.05 Ω vs. 0.0528 Ω) and melting I²t (4 vs. 4.615) are within acceptable tolerance for fast-blow cartridge fuse applications and do not affect functional interchangeability.

Frequently Asked Questions (FAQ)

Q: Can the 021701.6MXEP replace the 5SFP 1.6-R in existing designs?

A: Yes. Both parts share identical current ratings (1.6 A), voltage ratings (250 V AC), fuse type (cartridge glass), response time (fast blow), and package dimensions (5mm x 20mm axial through-hole). They are functionally equivalent for circuit protection applications.

Q: Are there dimensional differences between these parts?

A: The 5SFP 1.6-R measures 0.217" diameter x 0.827" length (5.50mm x 21.00mm). The 021701.6MXEP measures 0.228" diameter x 0.886" length (5.80mm x 22.50mm). These minor variations remain within acceptable tolerance for standard through-hole fuse holders.

Q: Do both parts meet the same regulatory standards?

A: Both parts are CE, CSA, SEMKO, and VDE certified. The 021701.6MXEP carries additional K-MARK, PSE, and UL certifications, providing broader geographic compliance coverage.

Q: What is the significance of the melting I²t difference?

A: The melting I²t values (4 vs. 4.615) represent thermal energy thresholds. Both values fall within the fast-blow cartridge fuse classification and do not affect substitution suitability for standard circuit protection applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the 5SFP 1.6-R and 021701.6MXEP are ROHS3 compliant and REACH unaffected.