HS300 R27 F Equivalent & Substitute Parts

Part Overview

The HS300 R27 F is a 300-watt wirewound chassis mount resistor manufactured by Ohmite, rated at 270 mOhms with ±1% tolerance. This component is designed for high-power applications requiring pulse withstanding capability and thermal stability. The part maintains Active product status with full RoHS compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the allowable specifications for this resistor category.

Substiute Parts

HS300 R27 F

OhmiteIn Stock: 792HS300 R27 F Datasheet

Current PartRFQ

HS200 R27 F

ARCOLIn Stock: 930HS200 R27 F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HS300 R27 F is determined by the following critical parameters:

Electrical Parameters (Must Match):

• Resistance value: 270 mOhms
• Tolerance: ±1%
• Composition: Wirewound
• Temperature Coefficient: ±100 ppm/°C range

Mechanical Parameters (Must Match):

• Housing Type: Aluminum
• Mounting Feature: Flanges
• Lead Style: M6 Threaded
• MSL Rating: 1 (Unlimited)

Compliance Parameters (Must Match):

• RoHS Compliant status
• ECCN: EAR99
• HTSUS: 8533.29.0000

Power Rating Consideration: The HS200 R27 F operates at 200W, which represents a reduced power capability compared to the 300W main part. This substitute is electrically equivalent but with lower thermal dissipation capacity. Selection depends on application power requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the HS300 R27 F and HS200 R27 F maintain Active product status with full RoHS compliance and identical MSL ratings. The primary differentiator is power dissipation capacity. The HS300 R27 F is specified for 300W applications, while the HS200 R27 F is rated for 200W. Selection between these parts must be based on the actual power dissipation requirements of the application circuit. The HS200 R27 F occupies a smaller footprint (4.631" x 1.791" versus 5.028" x 2.854"), which may influence PCB layout considerations. Both parts share identical electrical characteristics (270 mOhms, ±1% tolerance, wirewound composition) and mechanical interfaces (M6 threaded leads, aluminum housing with flanges, 1.646" seated height).

Frequently Asked Questions (FAQ)

Q: Can the HS200 R27 F replace the HS300 R27 F in all applications?

A: The HS200 R27 F is electrically equivalent but rated for 200W maximum power dissipation. It can replace the HS300 R27 F only in applications where power dissipation does not exceed 200W. Applications requiring the full 300W capability must use the HS300 R27 F.

Q: Are the physical dimensions compatible between these parts?

A: Both parts share identical seated height (1.646" / 41.80mm) and M6 threaded lead style. However, the HS200 R27 F has a smaller footprint (4.631" x 1.791") compared to the HS300 R27 F (5.028" x 2.854"). PCB layout and thermal management considerations may be affected by this size difference.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the HS300 R27 F and HS200 R27 F are RoHS Compliant with ECCN EAR99 and HTSUS 8533.29.0000 classification. Both maintain MSL Rating 1 (Unlimited).

Q: What is the tolerance specification for these resistors?

A: Both parts are specified at ±1% tolerance on the 270 mOhms resistance value.

Q: Are there differences in temperature coefficient between these parts?

A: The HS300 R27 F specifies 100 ppm/°C, while the HS200 R27 F specifies ±100 ppm/°C. Both fall within the same operational range for temperature stability.