Equivalent & Substitute Parts: 04M4702JF

Part Overview

The Vishay Dale 04M4702JF is an NTC thermistor with 47kΩ resistance at 25°C, packaged as a bead element with free-hanging leads. This component is classified as obsolete, necessitating identification of active substitute parts for new designs and ongoing production requirements. The part maintains ROHS3 compliance and is suitable for temperature sensing applications requiring stable resistance characteristics within the specified tolerance band.

Substiute Parts

04M4702JF

Vishay DaleIn Stock: 79704M4702JF Datasheet

Current PartRFQ

ND03Q00473J--

KYOCERA AVXIn Stock: 1230ND03Q00473J-- Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 04M4702JF is based on the following critical parameters:

Electrical Equivalence:

• Resistance value of 47kΩ at 25°C (exact match required)
• Resistance tolerance of ±5% or tighter (ensures interchangeability within circuit design margins)

Thermal Characteristics:

• B-value specifications where provided (determines temperature response curve)
• Operating temperature range compatibility with application requirements

Physical and Mechanical Compatibility:

• Lead length within acceptable range for circuit board layout
• Package form factor suitable for intended mounting method

Regulatory and Compliance Alignment:

• RoHS compliance status for applicable markets
• ECCN and HTSUS classifications for supply chain consistency

The KYOCERA AVX ND03Q00473J-- meets the core electrical requirements of 47kΩ resistance at ±5% tolerance and provides active product status for continued availability. Physical form factor differences (disc versus bead) and mounting type variations (through-hole versus free-hanging) require circuit-level evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: KYOCERA AVX ND03Q00473J--

The ND03Q00473J-- provides electrical equivalence to the 04M4702JF with identical 47kΩ resistance and ±5% tolerance specifications. The substitute is classified as an active product, ensuring supply chain availability for current and future production requirements.

Compliance Considerations:

The substitute part carries RoHS non-compliant status, whereas the original 04M4702JF is ROHS3 compliant. Applications subject to RoHS regulatory requirements must evaluate this compliance difference against regional market obligations.

Physical Integration Factors:

The substitute employs a disc package form factor (3.5mm diameter × 3.0mm width) with through-hole mounting, differing from the original bead package with free-hanging leads. Lead length is comparable (1.38" versus 1.42"), with a 1mm difference that typically accommodates standard circuit board layouts. Circuit board design modifications may be required to accommodate the different package geometry and mounting approach.

Thermal Performance:

The substitute provides a B25/85 value of 4300K, specifying the thermal response characteristic. The operating temperature range of -55°C to 150°C establishes the functional limits for the substitute component.

Frequently Asked Questions (FAQ)

Q: Can the ND03Q00473J-- directly replace the 04M4702JF without circuit modifications?

A: Electrical substitution is valid based on matching 47kΩ resistance and ±5% tolerance. Physical substitution requires evaluation of the package form factor change (disc versus bead) and mounting method difference (through-hole versus free-hanging). Circuit board layout and mechanical mounting provisions must be assessed for compatibility.

Q: What is the significance of the 1mm lead length difference?

A: The lead length difference (36mm original versus 35mm substitute) is within typical manufacturing tolerances and circuit board design margins. Standard through-hole spacing accommodates this variation. Verification against specific circuit board hole spacing is recommended for applications with tight mechanical constraints.

Q: Does the RoHS non-compliance of the substitute affect electrical performance?

A: RoHS compliance status is a regulatory and supply chain classification, not an electrical performance parameter. The non-compliant status indicates the substitute may contain restricted substances. Applications subject to RoHS requirements must address this compliance difference through design review or alternative part selection.

Q: What does the B25/85 value of 4300K indicate?

A: The B25/85 value specifies the thermistor's thermal response characteristic, representing the resistance change between 25°C and 85°C. This parameter defines the temperature sensing accuracy and response curve of the component within its operating range.

Q: Are there inventory considerations for the substitute part?

A: The substitute part (ND03Q00473J--) is listed as active with 1122 pieces in stock, providing supply availability. The original 04M4702JF is obsolete with 754 pieces remaining in inventory. New designs should transition to the active substitute to ensure long-term supply continuity.

Q: How do the package differences affect thermal response?

A: The disc package geometry (3.5mm diameter × 3.0mm width) differs from the bead form factor. Package geometry influences thermal time constant and heat transfer characteristics. Applications requiring specific thermal response times should evaluate the substitute's thermal performance against original design specifications.