WK73R2JTTE3243F Equivalent & Substitute Parts

Part Overview

The WK73R2JTTE3243F is a 324 kOhms ±1% 1W chip resistor manufactured by KOA Speer Electronics, Inc. in Wide 1812 (4532 Metric) package format. This component features automotive-grade AEC-Q200 qualification and moisture-resistant thick film construction, designed for high-reliability applications requiring stable resistance performance across extended temperature ranges.

The WK73R2JTTE3243F carries a "Not For New Designs" product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support ongoing production requirements for existing applications.

Substiute Parts

WK73R2JTTE3243F

KOA Speer Electronics, Inc.In Stock: 1007WK73R2JTTE3243F Datasheet

Current PartRFQ

WK73R2HTTE3243F

KOA Speer Electronics, Inc.In Stock: 878WK73R2HTTE3243F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WK73R2JTTE3243F is determined by the following critical parameters:

• Electrical Equivalence: Resistance value (324 kOhms), tolerance (±1%), power rating (1W), and temperature coefficient (±100ppm/°C) must remain identical
• Environmental Compliance: AEC-Q200 automotive qualification and moisture-resistant thick film construction must be maintained
• Thermal Performance: Operating temperature range (-55°C ~ 155°C) must be supported
• Regulatory Compliance: RoHS3 compliance and MSL 1 rating must be preserved

The substitute part WK73R2HTTE3243F meets all electrical and environmental criteria. The primary difference is the package format: Wide 2010 (5025 Metric) versus the original Wide 1812 (4532 Metric). This package change affects physical dimensions and board layout considerations but does not alter electrical performance or compliance status.

Parameter Comparison

Engineering Selection Recommendations

The WK73R2HTTE3243F is the qualified substitute for WK73R2JTTE3243F based on the following factors:

Compliance and Status: WK73R2HTTE3243F maintains Active product status, ensuring long-term availability and supply chain stability compared to the "Not For New Designs" classification of the original part. Both parts carry identical AEC-Q200 automotive qualification, RoHS3 compliance, and MSL 1 ratings.

Electrical Equivalence: All critical electrical parameters are identical: 324 kOhms resistance, ±1% tolerance, 1W power rating, ±100ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. Thick film composition and moisture-resistant construction are preserved.

Physical Considerations: The substitute part uses Wide 2010 (5025 Metric) packaging instead of Wide 1812 (4532 Metric). The dimensional change (0.098" L x 0.197" W versus 0.122" L x 0.181" W) requires PCB layout verification to confirm footprint compatibility. Height remains constant at 0.028" (0.70mm) maximum.

Frequently Asked Questions (FAQ)

Q: Can WK73R2HTTE3243F be used as a direct replacement for WK73R2JTTE3243F?

A: Electrical substitution is valid. All resistance, tolerance, power rating, temperature coefficient, and compliance parameters are identical. Physical substitution requires PCB layout verification due to package format change from Wide 1812 to Wide 2010.

Q: What is the primary difference between these two parts?

A: The package format differs. WK73R2JTTE3243F uses Wide 1812 (4532 Metric) with dimensions 0.122" L x 0.181" W. WK73R2HTTE3243F uses Wide 2010 (5025 Metric) with dimensions 0.098" L x 0.197" W. Electrical performance and compliance are identical.

Q: Are both parts AEC-Q200 qualified?

A: Yes. Both WK73R2JTTE3243F and WK73R2HTTE3243F carry AEC-Q200 automotive qualification and are suitable for automotive applications requiring this certification.

Q: What is the significance of the "Not For New Designs" status?

A: This designation indicates the WK73R2JTTE3243F is in end-of-life phase. The substitute WK73R2HTTE3243F carries Active status, providing assured long-term availability for production continuity.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are there any compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8533.21.0030).