BK/GDA-1.6A Equivalent & Substitute Parts

Part Overview

The BK/GDA-1.6A is a ceramic cartridge fuse rated at 1.6 A, 250 V AC/DC with a 5mm x 20mm form factor manufactured by Eaton - Electronics Division. This fast-blow fuse is designed for applications requiring circuit protection in AC and DC systems operating at 250 volts. The part is currently active in production with 725 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when alternative sourcing is required.

Substiute Parts

BK/GDA-1.6A

Eaton - Electronics DivisionIn Stock: 778BK/GDA-1.6A Datasheet

Current PartRFQ

GDA-1.6A

Eaton - Electronics DivisionIn Stock: 984GDA-1.6A Datasheet

Parametric EquivalentRFQ

0001.1006

SCHURTER Inc.In Stock: 13040001.1006 Datasheet

DirectRFQ

021601.6HXP

Littelfuse Inc.In Stock: 1197021601.6HXP Datasheet

DirectRFQ

5HF 1.6-R

Bel Fuse Inc.In Stock: 17975HF 1.6-R Datasheet

DirectRFQ

021601.6MXP

Littelfuse Inc.In Stock: 1876021601.6MXP Datasheet

SimilarRFQ

FCD-1.6A

OptiFuseIn Stock: 2355FCD-1.6A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/GDA-1.6A is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 1.6 A
• Voltage Rating - AC: 250 V
• Fuse Type: Cartridge, Ceramic
• Package / Case: 5mm x 20mm
• Response Time: Fast Blow
• Breaking Capacity @ Rated Voltage: 1.5 kA
• Mounting Type: Requires Holder

All substitute parts listed below meet these mandatory requirements. Variations in secondary parameters such as melting I²t, DC cold resistance, and operating temperature ranges do not disqualify substitution eligibility when primary electrical and mechanical specifications are identical. All substitute parts maintain active product status and are available in production quantities.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the BK/GDA-1.6A based on matching electrical and mechanical specifications. Selection among equivalent parts should be based on the following criteria:

Compliance and Certification Coverage: The BK/GDA-1.6A carries CCC, SEMKO, and UL approvals. Substitute parts offer expanded certification coverage:

• 021601.6HXP and 021601.6MXP (Littelfuse) provide CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE certifications
• 5HF 1.6-R (Bel Fuse) provides CCC, CE, CSA, cURus, IMQ, PSE, SEMKO, and VDE certifications
• 0001.1006 (SCHURTER) provides CCC, cURus, KC, PSE/JET, and VDE certifications

Product Status and Availability: All substitute parts maintain active production status. Inventory levels vary: FCD-1.6A (OptiFuse) has the highest stock at 2280 units, followed by 021601.6MXP (Littelfuse) at 1799 units and 5HF 1.6-R (Bel Fuse) at 1687 units.

Environmental and Regulatory Compliance: All substitute parts are ROHS3 compliant and REACH unaffected, with the exception of GDA-1.6A (Eaton) which does not specify RoHS status. All substitute parts specify operating temperature ranges of -55°C to 125°C, providing broader thermal performance documentation than the primary part.

Parametric Equivalence: GDA-1.6A (Eaton) is a direct parametric equivalent with identical melting I²t (0.748) and DC cold resistance (0.113 Ohms) to the primary part BK/GDA-1.6A, differing only in approval agency listing.

Frequently Asked Questions (FAQ)

Q: Can I substitute any of these parts for the BK/GDA-1.6A in my application?

A: Yes. All listed parts meet the mandatory electrical and mechanical specifications: 1.6 A current rating, 250 V AC voltage rating, 5mm x 20mm package, fast-blow response, 1.5 kA breaking capacity, and ceramic cartridge construction. Physical and electrical compatibility is assured.

Q: What is the difference between the various Littelfuse parts (021601.6HXP and 021601.6MXP)?

A: Both Littelfuse parts are from the 216 series and share identical electrical specifications: 1.6 A, 250 V, 1.5 kA breaking capacity, 1.005 melting I²t, and 0.1112 Ohms DC cold resistance. The designation suffix (HXP vs. MXP) indicates different internal construction or packaging variants within the same electrical specification class. Both are functionally equivalent substitutes.

Q: Why do the melting I²t values differ across substitute parts?

A: Melting I²t is a secondary parameter that reflects the thermal energy required to melt the fuse element. While all parts are rated at 1.6 A with fast-blow response, variations in element design and material composition result in different I²t values. These variations do not affect substitution eligibility when primary specifications (current, voltage, breaking capacity, response time) are identical.

Q: Does the DC cold resistance variation matter for my application?

A: DC cold resistance is a secondary parameter that reflects the resistance of the fuse element at room temperature. Variations from 0.072 Ohms (5HF 1.6-R) to 0.113 Ohms (BK/GDA-1.6A) are within normal manufacturing tolerances for ceramic cartridge fuses. This parameter does not affect substitution eligibility when primary electrical specifications match.

Q: Are all substitute parts available in the same package dimensions?

A: All substitute parts use the 5mm x 20mm form factor. The 5HF 1.6-R has a slightly different diameter specification (0.201" vs. 0.205"), but this falls within standard manufacturing tolerances for this package class and does not affect holder compatibility.

Q: Which substitute part has the broadest regulatory approval?

A: The 021601.6HXP and 021601.6MXP (Littelfuse) parts carry the most comprehensive certification coverage, including CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE approvals. The 5HF 1.6-R (Bel Fuse) also provides extensive coverage with CCC, CE, CSA, cURus, IMQ, PSE, SEMKO, and VDE certifications.

Q: Can I use these parts in both AC and DC applications?

A: The primary part BK/GDA-1.6A is rated for 250 V AC/DC. Most substitute parts specify 250 V AC rating. The FCD-1.6A (OptiFuse) explicitly specifies both 250 V AC and 250 V DC ratings. For DC applications, verify the specific part's DC voltage rating in the manufacturer's datasheet.

Q: What is the difference between the Eaton GDA-1.6A and BK/GDA-1.6A?

A: Both are Eaton GDA series parts with identical electrical and mechanical specifications. The BK prefix on BK/GDA-1.6A may indicate a specific packaging or distribution variant. Both are functionally equivalent and interchangeable.