Equivalent & Substitute Parts for 04T1003FF

Part Overview

The 04T1003FF is an NTC thermistor manufactured by Vishay Dale, featuring a 100kΩ resistance at 25°C with a bead package configuration. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing applications requiring NTC temperature sensing functionality. The part operates across a temperature range of -40°C to 125°C with a maximum power dissipation of 50 mW and is fully RoHS3 compliant.

Substiute Parts

04T1003FF

Vishay DaleIn Stock: 92204T1003FF Datasheet

Current PartRFQ

DG104410

AmethermIn Stock: 1380DG104410 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 04T1003FF is determined by the following critical parameters:

• Resistance Value: Both parts must maintain 100kΩ at 25°C to ensure circuit compatibility
• B Value Characteristics: The B25/75 parameter (4247K for the main part) defines the thermistor's temperature response curve; substitute parts must demonstrate comparable B value performance within acceptable engineering tolerances
• Mounting Configuration: Through-hole bead package is required to maintain mechanical compatibility
• Operating Temperature Range: The substitute must support the application's thermal operating window
• Power Dissipation: Maximum power rating must meet or exceed circuit requirements
• Compliance Standards: RoHS3 compliance is mandatory for current procurement

The DG104410 from Ametherm qualifies as a functional equivalent based on matching resistance value, bead package type, through-hole mounting, and RoHS3 compliance status.

Parameter Comparison

Engineering Selection Recommendations

The DG104410 is an active equivalent for the obsolete 04T1003FF. Both components share identical 100kΩ resistance values and comparable B25/75 characteristics (4247K vs. 4246K), ensuring equivalent temperature sensing performance within the specified operating range.

Key considerations for selection:

• The DG104410 features a wider operating temperature range (-55°C to 300°C) compared to the 04T1003FF (-40°C to 125°C), providing extended thermal capability for applications requiring broader temperature coverage
• The DG104410 has a lower maximum power dissipation (30 mW versus 50 mW); circuit designs must confirm that thermal dissipation requirements do not exceed 30 mW
• Resistance tolerance widens from ±1% to ±5%, and B value tolerance increases from ±1% to ±3%; applications requiring tighter tolerance specifications must evaluate impact on measurement accuracy
• Both components maintain RoHS3 compliance and through-hole bead package configuration, supporting direct mechanical and electrical substitution

Frequently Asked Questions (FAQ)

Q: Can the DG104410 directly replace the 04T1003FF in existing designs?

A: Direct substitution is possible when circuit power dissipation does not exceed 30 mW and tolerance specifications permit the wider ±5% resistance tolerance and ±3% B value tolerance of the DG104410. The matching 100kΩ resistance and comparable B25/75 values (4247K vs. 4246K) ensure functional equivalence for temperature sensing applications within the overlapping operating range of -40°C to 125°C.

Q: What is the significance of B value parameters in thermistor substitution?

A: The B value defines the thermistor's temperature response curve. The B25/75 parameter (4247K for 04T1003FF, 4246K for DG104410) indicates the resistance change between 25°C and 75°C. The near-identical values ensure comparable temperature sensing accuracy across the operating range.

Q: Are there mechanical compatibility concerns between these parts?

A: Both components use through-hole bead package configurations. The DG104410 specifies a glass bead variant with a lead wire length of 2.56" (65.00mm) compared to the 04T1003FF at 3.00" (76.20mm). Lead length differences may require circuit board layout verification but do not prevent substitution.

Q: What compliance certifications apply to both parts?

A: Both the 04T1003FF and DG104410 are RoHS3 compliant and carry EAR99 ECCN classification. The DG104410 additionally holds REACH Unaffected status. Both components satisfy current regulatory requirements for electronic component procurement.

Q: How does the power dissipation difference affect circuit design?

A: The DG104410 maximum power rating of 30 mW is lower than the 04T1003FF at 50 mW. Circuit designs must confirm that actual thermal dissipation remains within the 30 mW limit. Exceeding this threshold may cause measurement inaccuracy or component degradation.