Equivalent & Substitute Parts for TWW5JR30

Part Overview

The TWW5JR30 is a 300 mOhms ±5% 5W through-hole radial wirewound resistor manufactured by Ohmite. This component is classified as obsolete, which necessitates identification of suitable alternatives for ongoing applications and new designs. The part features flame-proof and safety-rated construction suitable for industrial and high-reliability applications.

Key Parameters

Parameter	Value
Resistance	300 mOhms
Tolerance	±5%
Power Rating	5W
Composition	Wirewound
Package Type	Radial
Operating Temperature Range	-55°C to 275°C
Temperature Coefficient	±400ppm/°C
Physical Dimensions	0.492" L x 0.354" W (12.50mm x 9.00mm)
Height - Seated (Max)	1.024" (26.00mm)
Terminations	2

Substitute Part Grouping Explanation

Substitution eligibility for the TWW5JR30 is determined by strict equivalence across the following critical parameters:

Resistance value: 300 mOhms
Tolerance: ±5%
Power rating: 5W
Composition: Wirewound
Package configuration: Radial
Operating temperature range: -55°C to 275°C
Temperature coefficient: ±400ppm/°C
Physical dimensions and height specifications
Number of terminations: 2

The TWW5JR30E qualifies as a direct substitute based on complete alignment with all specified electrical and mechanical parameters. The primary distinction is product status and compliance certification.

Parameter Comparison

Parameter	TWW5JR30	TWW5JR30E
Manufacturer	Ohmite	Ohmite
Series	TWW	TWW
Resistance	300 mOhms	300 mOhms
Tolerance	±5%	±5%
Power Rating	5W	5W
Composition	Wirewound	Wirewound
Features	Flame Proof, Safety	Flame Proof, Safety
Temperature Coefficient	±400ppm/°C	±400ppm/°C
Operating Temperature	-55°C to 275°C	-55°C to 275°C
Package / Case	Radial	Radial
Dimensions	0.492" L x 0.354" W (12.50mm x 9.00mm)	0.492" L x 0.354" W (12.50mm x 9.00mm)
Height - Seated (Max)	1.024" (26.00mm)	1.024" (26.00mm)
Terminations	2	2
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8533.21.0080	8533.21.0080

Engineering Selection Recommendations

The TWW5JR30E is the direct equivalent for the obsolete TWW5JR30. Both components share identical electrical specifications, mechanical dimensions, and thermal characteristics. The TWW5JR30E is currently in active production status with improved compliance certification. For applications requiring RoHS3 compliance, the TWW5JR30E is the appropriate selection. Both parts maintain REACH unaffected status and identical export classification under EAR99.

Frequently Asked Questions (FAQ)

Q: Can TWW5JR30E be used as a direct replacement for TWW5JR30?

A: Yes. The TWW5JR30E is electrically and mechanically identical to the TWW5JR30 across all specified parameters including resistance, tolerance, power rating, temperature range, and physical dimensions.

Q: What is the primary difference between TWW5JR30 and TWW5JR30E?

A: The TWW5JR30 is obsolete, while the TWW5JR30E is active production. The TWW5JR30E also carries ROHS3 compliance certification, whereas the TWW5JR30 is RoHS non-compliant.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.492" L x 0.354" W (12.50mm x 9.00mm) with a maximum seated height of 1.024" (26.00mm). Radial package configuration is identical.

Q: Do both parts operate across the same temperature range?

A: Yes. Both the TWW5JR30 and TWW5JR30E operate from -55°C to 275°C with a temperature coefficient of ±400ppm/°C.

Q: What packaging options are available?

A: The TWW5JR30 is available in standard packaging. The TWW5JR30E is supplied in bulk packaging.

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