PR502J2 NTC Thermistor 5kΩ Bead - Equivalent & Substitute Parts

Part Overview

The PR502J2 is an NTC (Negative Temperature Coefficient) thermistor manufactured by Littelfuse Inc., designed for temperature sensing applications. This component features a 5kΩ resistance at 25°C with a B0/50 value of 3892K, housed in an epoxy bead package with 1.50" lead wire length. The PR502J2 is classified as obsolete, making identification of active equivalent parts essential for ongoing procurement and system maintenance.

Substiute Parts

PR502J2

Littelfuse Inc.In Stock: 882PR502J2 Datasheet

Current PartRFQ

PS502J2

Littelfuse Inc.In Stock: 2881PS502J2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PR502J2 is determined by the following critical parameters:

• Resistance Value: 5kΩ at 25°C (must match exactly)
• B-Value Characteristic: B0/50 = 3892K (defines temperature response curve)
• Power Dissipation: 30 mW maximum (thermal handling capability)
• Package Type: Bead, Epoxy with 1.50" lead wire length (physical and thermal interface)
• Mounting Configuration: Free Hanging (installation method)

The PS502J2 qualifies as a direct substitute based on identical values across all critical parameters. The primary distinction is product status: PS502J2 is active and currently manufactured, whereas PR502J2 is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The PS502J2 is the direct equivalent for PR502J2 replacement. Both components share identical electrical characteristics (5kΩ resistance, 3892K B-value) and thermal specifications (30 mW power rating). Both maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.

The PS502J2 offers an extended operating temperature range (-80°C to 150°C versus -55°C to 80°C), providing broader application flexibility without compromising the core thermal sensing function. As an active product with current manufacturing status, PS502J2 ensures long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can PS502J2 replace PR502J2 in existing designs? A: Yes. Both components have identical resistance values (5kΩ), B-value characteristics (3892K), power ratings (30 mW), and physical dimensions (1.50" lead wire, bead epoxy package). Electrical and thermal performance are equivalent.

Q: What is the primary difference between PR502J2 and PS502J2? A: PR502J2 is obsolete; PS502J2 is active. PS502J2 also features an extended operating temperature range (-80°C to 150°C) compared to PR502J2 (-55°C to 80°C).

Q: Are there packaging differences between these parts? A: PR502J2 packaging is unspecified in available data. PS502J2 is supplied in bulk packaging. Both use identical bead epoxy case construction with free-hanging mounting.

Q: Do both parts meet current regulatory standards? A: Yes. Both PR502J2 and PS502J2 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Is the extended temperature range of PS502J2 a concern for PR502J2 applications? A: No. The PS502J2 temperature range encompasses the PR502J2 range. Applications operating within -55°C to 80°C will function identically with either component.