SR-5-1.6A-AP Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The SR-5-1.6A-AP is a 1.6 A, 250 V AC/DC board mount fuse manufactured by Eaton - Electronics Division. This slow blow fuse is designed for through-hole radial mounting in vertical orientation and is currently in active production status. The part is RoHS compliant and carries multiple international approvals including CCC, cULus, KC-MARK, PSE, SEMKO, and VDE certifications. Equivalent and substitute parts are identified to support component sourcing flexibility, inventory management, and supply chain continuity.

Substiute Parts

SR-5-1.6A-AP

Eaton - Electronics DivisionIn Stock: 3050SR-5-1.6A-AP Datasheet

Current PartRFQ

37211600001

LittelfuseIn Stock: 4434737211600001 Datasheet

DirectRFQ

37011600000

Littelfuse Inc.In Stock: 527837011600000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SR-5-1.6A-AP are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Matching Parameters:

• Current Rating: 1.6 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can, Vertical (exact match required)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)

Secondary Compatibility Parameters:

• Response Time classification (Slow Blow vs. Fast Blow)
• Melting I²t characteristics
• DC Cold Resistance values
• Physical dimensions (within tolerance)

The identified substitute parts are:

1. 37211600001 (Littelfuse TR5® 372 Series) – Direct equivalent with slow blow response time matching the main part
2. 37011600000 (Littelfuse TR5® 370 Series) – Similar substitute with fast blow response time; suitable only where fast blow operation is acceptable

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 37211600001 (Littelfuse TR5® 372 Series)

The 37211600001 is the direct equivalent substitute for the SR-5-1.6A-AP. Both parts share identical electrical ratings (1.6 A, 250 V AC/DC), matching response time classification (Slow Blow), and equivalent breaking capacity (35 A). Physical dimensions are within acceptable tolerance (height difference of 0.004" / 0.10mm). Both parts carry active product status and maintain compliance with CCC, PSE, SEMKO, and VDE certifications. The melting I²t value of 19.968 for the 37211600001 is within acceptable range relative to the main part's 24. DC cold resistance values are equivalent (0.042 Ohms vs. 0.043 Ohms). This substitute is suitable for direct replacement in applications requiring slow blow fuse protection.

Secondary Substitute: 37011600000 (Littelfuse TR5® 370 Series)

The 37011600000 shares all critical electrical and mechanical parameters with the SR-5-1.6A-AP except for response time classification. This part is rated as Fast Blow, whereas the main part is Slow Blow. The melting I²t value of 0.53 indicates significantly faster response characteristics. This substitute is suitable only in applications where fast blow operation is specified or where the circuit design accommodates faster fuse response. Physical dimensions and mounting characteristics are identical to the primary substitute. Both parts maintain equivalent compliance certifications and active product status.

Frequently Asked Questions (FAQ)

Q: Can 37211600001 be used as a direct replacement for SR-5-1.6A-AP?

A: Yes. The 37211600001 meets all critical electrical parameters (1.6 A, 250 V AC/DC), response time classification (Slow Blow), mounting type (Through Hole), and package configuration (Radial, Can, Vertical). Physical dimensions are within acceptable tolerance. Both parts carry equivalent international certifications.

Q: What is the difference between the 37211600001 and 37011600000 substitutes?

A: The primary difference is response time classification. The 37211600001 is Slow Blow (melting I²t: 19.968), matching the SR-5-1.6A-AP. The 37011600000 is Fast Blow (melting I²t: 0.53), providing faster circuit protection response. Both share identical current, voltage, and mounting specifications. Selection depends on circuit protection requirements.

Q: Are there any dimensional compatibility concerns with these substitutes?

A: The 37211600001 and 37011600000 have a height of 0.315" (8.00mm) compared to the SR-5-1.6A-AP at 0.319" (8.10mm). This 0.004" (0.10mm) difference is within standard PCB through-hole tolerance and does not affect mechanical or electrical compatibility. Diameter specifications are identical at 0.335" (8.50mm).

Q: Do all three parts carry the same international certifications?

A: The SR-5-1.6A-AP carries CCC, cULus, KC-MARK, PSE, SEMKO, and VDE certifications. The Littelfuse substitutes (37211600001 and 37011600000) carry CCC, cURus, PSE, SEMKO, and VDE certifications. Both sets meet primary regulatory requirements for board mount fuse applications.

Q: What is the significance of the melting I²t parameter in substitute selection?

A: Melting I²t defines the thermal energy required to melt the fuse element and is directly related to response time. The SR-5-1.6A-AP has a melting I²t of 24 (Slow Blow). The 37211600001 at 19.968 provides comparable slow blow protection. The 37011600000 at 0.53 indicates fast blow operation. Selection must align with circuit protection design requirements.

Q: Are these substitutes suitable for both AC and DC applications?

A: Yes. All three parts are rated for 250 V AC/DC operation. The voltage rating applies to both alternating and direct current applications within the specified operating temperature range of -40°C to 85°C.

Q: What is the breaking capacity specification and why is it important?

A: Breaking capacity (35 A for all three parts) is the maximum current the fuse can safely interrupt without damage or hazard. This specification ensures the fuse operates safely under fault conditions and must match the circuit's maximum prospective fault current.