MAX-20 Automotive Fuse Equivalent & Substitute Parts

Part Overview

The MAX-20 is a 20A 32VDC automotive blade fuse manufactured by Eaton - Bussmann Electrical Division. This fast-blow fuse is designed for automotive electrical circuits requiring holder-based mounting and provides 1kA breaking capacity at rated voltage. The part maintains active product status with 891 units in current inventory. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and functional characteristics align with the original specification.

Substiute Parts

MAX-20

Eaton - Bussmann Electrical DivisionIn Stock: 928MAX-20 Datasheet

Current PartRFQ

0299020.ZXNV

LittelfuseIn Stock: 134690299020.ZXNV Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX-20 is determined by strict alignment of the following critical parameters:

• Current Rating: 20 A (exact match required)
• Voltage Rating (DC): 32 V (exact match required)
• Package / Case: Blade, Max (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Fuse Type: Automotive (exact match required)
• Breaking Capacity @ Rated Voltage: 1 kA (exact match required)

The substitute part 0299020.ZXNV (Littelfuse MAXI®) meets all critical electrical and mechanical parameters. Dimensional tolerance between the main part and substitute (0.350" W vs. 0.348" W) falls within acceptable mechanical compatibility for blade fuse holder applications. Both parts maintain active product status and RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the MAX-20 and 0299020.ZXNV maintain active product status and meet RoHS compliance requirements. The substitute part 0299020.ZXNV is electrically and mechanically compatible based on matching current rating, voltage rating, package type, and breaking capacity specifications. Dimensional variance (0.002" width difference) is within acceptable tolerance for blade fuse holder compatibility. Selection between these parts should be based on application-specific response time requirements: the MAX-20 provides fast-blow response, while the 0299020.ZXNV provides slow-blow response. Inventory availability and supply chain considerations may also influence part selection.

Frequently Asked Questions (FAQ)

Q: Can the 0299020.ZXNV replace the MAX-20 in all applications?

A: The 0299020.ZXNV is mechanically and electrically compatible with the MAX-20 based on matching current rating (20A), voltage rating (32VDC), package type (Blade, Max), and breaking capacity (1kA). However, the response time differs: MAX-20 is fast-blow while 0299020.ZXNV is slow-blow. Application requirements determine whether this difference is acceptable.

Q: What is the significance of the dimensional difference between these parts?

A: The width variance (0.350" vs. 0.348") represents a 0.002" difference. This tolerance is within acceptable mechanical compatibility for standard blade fuse holder applications and does not affect electrical performance or physical fit.

Q: Are both parts RoHS compliant?

A: Yes. The MAX-20 is RoHS Compliant, and the 0299020.ZXNV is ROHS3 Compliant. Both meet current RoHS requirements.

Q: What does "Requires Holder" mean for mounting type?

A: Both parts are designed for use with automotive fuse holders. They are not soldered directly to circuit boards but inserted into dedicated fuse holder sockets.

Q: Why is response time listed differently for these parts?

A: Response time (fast-blow vs. slow-blow) indicates how quickly the fuse element melts under overcurrent conditions. Fast-blow fuses respond to transient overcurrents more quickly, while slow-blow fuses tolerate brief overcurrent spikes. Application circuit characteristics determine which response type is appropriate.