Littelfuse 0218.040TXP Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0218.040TXP is an active-status glass cartridge fuse rated at 40 mA, 250 V AC/DC with slow-blow response characteristics. This component is designed for circuit protection in applications requiring a 5mm x 20mm form factor with holder mounting. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and performance specifications to ensure direct functional interchangeability in circuit protection applications.

Substiute Parts

0218.040TXP

Littelfuse Inc.In Stock: 8850218.040TXP Datasheet

Current PartRFQ

0218.040HXP

Littelfuse Inc.In Stock: 7600218.040HXP Datasheet

Parametric EquivalentRFQ

0218.040MXP

Littelfuse Inc.In Stock: 13310218.040MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0218.040TXP are qualified based on the following critical parameters:

• Current Rating: 40 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package Dimensions: 5mm x 20mm (exact match required)
• Breaking Capacity: 35 A @ rated voltage (exact match required)
• Operating Temperature: -55°C to 125°C (exact match required)
• Compliance: ROHS3 Compliant, CCC, CE, CSA, SEMKO, UL, VDE certifications

The following Littelfuse Series 218 parts meet all substitution criteria:

• 0218.040HXP: Parametric equivalent with identical electrical and mechanical specifications
• 0218.040MXP: Parametric equivalent with identical electrical and mechanical specifications

Parameter Comparison

Engineering Selection Recommendations

All three parts—0218.040TXP, 0218.040HXP, and 0218.040MXP—are active-status components manufactured by Littelfuse Inc. and carry identical electrical ratings, mechanical dimensions, and regulatory certifications. Selection among these equivalents may be based on inventory availability:

• 0218.040TXP: 800 Pcs in stock
• 0218.040HXP: 720 Pcs in stock
• 0218.040MXP: 1,286 Pcs in stock

All parts comply with ROHS3, CCC, CE, CSA, SEMKO, UL, and VDE standards, confirming suitability for regulated applications. Direct substitution is supported across all three part numbers without circuit modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can 0218.040HXP or 0218.040MXP be used as direct replacements for 0218.040TXP?

A: Yes. Both parts are parametric equivalents with identical current rating (40 mA), voltage rating (250 V AC), fuse type (cartridge, glass), response time (slow blow), package dimensions (5mm x 20mm), breaking capacity (35 A), and operating temperature range (-55°C to 125°C). No circuit modification is required.

Q: Are there differences in DC cold resistance between these parts?

A: Yes. The 0218.040TXP has a DC cold resistance of 31.862 Ohms, while both 0218.040HXP and 0218.040MXP have 35.7 Ohms. This difference does not affect substitution eligibility for circuit protection applications.

Q: Are there differences in melting I²t values?

A: Yes. The 0218.040TXP has a melting I²t of 0.011, while both 0218.040HXP and 0218.040MXP have 0.00536. Both values fall within the slow-blow response classification and do not prevent substitution.

Q: Do all three parts require the same holder?

A: Yes. All three parts use the same 5mm x 20mm holder mounting configuration. No holder replacement is necessary when substituting between these parts.

Q: What regulatory certifications apply to all substitute parts?

A: All three parts carry CCC, CE, CSA, SEMKO, UL, and VDE certifications. The 0218.040TXP also includes KC approval, while 0218.040HXP and 0218.040MXP include K-MARK approval. All certifications confirm compliance with international safety and performance standards.

Q: Are these parts RoHS compliant?

A: Yes. All three parts are ROHS3 Compliant and REACH Unaffected, confirming compliance with environmental and hazardous substance regulations.