508AS500KDG2 Equivalent & Substitute Parts

Part Overview

The 508AS500KDG2 is a 48W ceramic chassis mount resistor manufactured by Ohmite, rated at 50 Ohms with ±10% tolerance. This component is designed for high-power applications requiring reliable thermal dissipation and pulse withstanding capability. The part maintains Active product status with 797 units in current inventory. Substitute parts are identified to provide alternatives when the primary specification is unavailable or when application requirements permit operation at reduced power ratings within the same electrical and mechanical parameter set.

Substiute Parts

508AS500KDG2

OhmiteIn Stock: 842508AS500KDG2 Datasheet

Current PartRFQ

502AS500KDG2

OhmiteIn Stock: 1013502AS500KDG2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 502AS500KDG2 qualifies as a parametric equivalent based on the following criteria:

Matching Parameters:

• Resistance value: 50 Ohms
• Tolerance: ±10%
• Composition: Ceramic
• Temperature Coefficient: 0 / -800ppm/°C
• Operating Temperature Range: -55°C to 230°C
• Lead Style: Solder Lugs
• Package Type: Radial, Flat Oval
• Series: 500 (same product family)

Differing Parameter:

• Power Rating: 12W (versus 48W for the main part)

The 502AS500KDG2 maintains electrical equivalence across all resistance, tolerance, and thermal characteristics. The reduced power rating of 12W represents a derating that restricts application scope but does not affect electrical compatibility for circuits operating within the 12W thermal envelope.

Parameter Comparison

Engineering Selection Recommendations

Both the 508AS500KDG2 and 502AS500KDG2 maintain identical electrical characteristics and thermal operating ranges. Selection between these parts depends on application power dissipation requirements:

• 508AS500KDG2 is specified for applications requiring the full 48W power rating with corresponding thermal management infrastructure.
• 502AS500KDG2 is suitable for applications where power dissipation does not exceed 12W, offering a lower-cost alternative within the same electrical specification.

Both parts carry identical RoHS non-compliant status and REACH Unaffected classification. Component selection should be based on actual circuit power requirements and thermal design constraints rather than availability alone.

Frequently Asked Questions (FAQ)

Q: Can the 502AS500KDG2 be used in place of the 508AS500KDG2?

A: The 502AS500KDG2 provides electrical equivalence for applications where power dissipation remains below 12W. Exceeding this power rating will cause the component to operate outside its thermal design envelope. Verify circuit power calculations before substitution.

Q: Are the physical dimensions compatible between these parts?

A: Both parts use identical lead styles (Solder Lugs) and package types (Radial, Flat Oval). The 508AS500KDG2 measures 8.000" L × 0.252" W with 1.500" seated height, while the 502AS500KDG2 measures 2.000" L × 0.252" W with identical 1.500" seated height. Width and height are identical; length differs due to power rating differences.

Q: Do these parts have different compliance certifications?

A: Both parts share identical RoHS non-compliant status and REACH Unaffected classification. No compliance advantage exists between the two options.

Q: What is the temperature coefficient significance for these resistors?

A: Both parts specify 0 / -800ppm/°C temperature coefficient across the -55°C to 230°C operating range. This specification is identical and does not differentiate the parts.

Q: Are there packaging differences between these parts?

A: The 508AS500KDG2 is supplied in standard packaging, while the 502AS500KDG2 is packaged in boxes. Both are new original stock. Packaging format does not affect electrical or mechanical compatibility.