THS503K3J Equivalent & Substitute Parts

Part Overview

The THS503K3J is a 3.3 kOhms ±5% 50W wirewound chassis mount resistor manufactured by TE Connectivity Passive Product. This component is designed for high-power applications requiring stable resistance values across extended operating temperature ranges. The part is currently Active in product status with 694 pieces available in stock. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component, enabling direct replacement in circuit designs without performance degradation.

Key Parameters

Parameter	Value
Resistance	3.3 kOhms
Tolerance	±5%
Power Rating	50W
Composition	Wirewound
Temperature Coefficient	±30ppm/°C
Operating Temperature Range	-55°C ~ 200°C
Housing Type	Aluminum
Mounting Feature	Flanges
Dimensions	2.008" L x 1.181" W (51.00mm x 30.00mm)
Height - Seated (Max)	0.669" (17.00mm)
Lead Style	Solder Lugs
Package Type	Axial, Box
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the THS503K3J are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic requires exact matching of the following specifications:

Resistance value: 3.3 kOhms
Tolerance: ±5%
Power rating: 50W
Composition: Wirewound
Temperature coefficient: ±30ppm/°C
Operating temperature range: -55°C ~ 200°C
Housing material: Aluminum
Mounting configuration: Flanges with solder lugs
Physical dimensions: 2.008" L x 1.181" W x 0.669" H maximum
Package configuration: Axial, Box
Compliance: ROHS3 Compliant

The HSA503K3J meets all these criteria and is classified as a parametric equivalent. Both parts are manufactured by TE Connectivity Passive Product and share identical electrical performance characteristics and mechanical form factors.

Parameter Comparison

Parameter	THS503K3J	HSA503K3J	Match Status
Manufacturer	TE Connectivity Passive Product	TE Connectivity Passive Product	Identical
Resistance	3.3 kOhms	3.3 kOhms	Identical
Tolerance	±5%	±5%	Identical
Power Rating	50W	50W	Identical
Composition	Wirewound	Wirewound	Identical
Temperature Coefficient	±30ppm/°C	±30ppm/°C	Identical
Operating Temperature	-55°C ~ 200°C	-55°C ~ 200°C	Identical
Housing Type	Aluminum	Aluminum	Identical
Mounting Feature	Flanges	Flanges	Identical
Dimensions (L x W)	2.008" x 1.181" (51.00mm x 30.00mm)	2.008" x 1.181" (51.00mm x 30.00mm)	Identical
Height - Seated (Max)	0.669" (17.00mm)	0.669" (17.00mm)	Identical
Lead Style	Solder Lugs	Solder Lugs	Identical
Package Type	Axial, Box	Axial, Box	Identical
Product Status	Active	Active	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
ECCN	EAR99	EAR99	Identical
HTSUS Code	8533.29.0000	8533.29.0000	Identical

Engineering Selection Recommendations

Both the THS503K3J and HSA503K3J are Active products manufactured by TE Connectivity Passive Product with full ROHS3 compliance. The HSA503K3J is available with 863 pieces in stock compared to 694 pieces for the THS503K3J, providing enhanced supply availability. Both parts carry identical ECCN (EAR99) and HTSUS classifications, ensuring equivalent regulatory treatment in procurement and export scenarios. Selection between these parts should be based on inventory availability and lead time requirements, as all electrical performance and mechanical specifications are identical.

Frequently Asked Questions (FAQ)

Q: Can the HSA503K3J be used as a direct replacement for the THS503K3J?

A: Yes. The HSA503K3J is a parametric equivalent with identical resistance, tolerance, power rating, temperature coefficient, operating temperature range, physical dimensions, and mounting configuration. Direct substitution is supported without circuit redesign.

Q: Are there differences in the series designation between these parts?

A: The THS503K3J belongs to the THS and CGS series, while the HSA503K3J belongs to the HS and CGS series. Both are manufactured by TE Connectivity Passive Product and share the same base product specifications for the 50W chassis mount resistor platform.

Q: What is the significance of the different base product numbers?

A: The THS503K3J uses base product number THS50, while the HSA503K3J uses base product number HSA50. These designations reflect different product lines within TE Connectivity's wirewound resistor portfolio, but the specific 3.3 kOhm 50W variants are electrically and mechanically equivalent.

Q: Are both parts compliant with environmental regulations?

A: Both parts are ROHS3 Compliant. The THS503K3J has REACH Status listed as Vendor Undefined, while the HSA503K3J has REACH Status listed as REACH Unaffected. Both carry EAR99 ECCN classification and 8533.29.0000 HTSUS code.

Q: What are the physical mounting considerations for these chassis mount resistors?

A: Both parts feature aluminum housing with flanged mounting and solder lugs for connection. The identical dimensions of 2.008" L x 1.181" W x 0.669" H (maximum seated height) ensure mechanical compatibility in existing PCB layouts and chassis designs.

Q: Is there a difference in inventory availability between these parts?

A: The HSA503K3J has 863 pieces in stock compared to 694 pieces for the THS503K3J. For applications requiring immediate availability, the HSA503K3J may offer shorter lead times.

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