RL73H2AR91FTDF Equivalent & Substitute Parts

Part Overview

The RL73H2AR91FTDF is a 910 mOhms ±1% thick film chip resistor manufactured by TE Connectivity Passive Product, designed for current sensing applications in 0805 (2012 Metric) package format. This component operates at 0.125W (1/8W) power rating with a temperature coefficient of ±100ppm/°C across an operating range of -55°C to 155°C. The part is Active in product status and carries ROHS3 compliance with unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications, package dimensions, and functional characteristics to ensure direct circuit compatibility.

Substiute Parts

RL73H2AR91FTDF

TE Connectivity Passive ProductIn Stock: 758RL73H2AR91FTDF Datasheet

Current PartRFQ

CRM0805-FX-R910ELF

Bourns Inc.In Stock: 22894CRM0805-FX-R910ELF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RL73H2AR91FTDF are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria include:

Electrical Parameters: Resistance value (910 mOhms), tolerance (±1%), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C) must remain identical across all substitute parts.

Mechanical Parameters: Package format (0805 / 2012 Metric), composition (Thick Film), and number of terminations (2) must match the original specification.

Functional Characteristics: Current sense application designation must be maintained.

Compliance & Certifications: RoHS3 compliance, MSL 1 rating, and REACH unaffected status are required for all substitutes.

The CRM0805-FX-R910ELF manufactured by Bourns Inc. qualifies as a substitute part. While this part features a higher power rating (0.25W / 1/4W compared to 0.125W / 1/8W), all critical electrical parameters, package specifications, and compliance certifications align with the original component, enabling direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the RL73H2AR91FTDF and CRM0805-FX-R910ELF are Active products with full ROHS3 compliance and REACH unaffected status, ensuring regulatory compliance for current applications and future market requirements. The CRM0805-FX-R910ELF offers a higher power dissipation capability (0.25W versus 0.125W) while maintaining identical electrical characteristics, tolerance, and temperature performance. This upgrade path provides enhanced thermal margin in current sensing circuits without compromising accuracy or stability. Physical dimensions remain compatible within standard PCB assembly tolerances, with the Bourns component featuring slightly reduced height (0.60mm versus 0.65mm maximum seated height). Selection between these parts should be based on circuit power dissipation requirements and thermal design considerations.

Frequently Asked Questions (FAQ)

Q: Can the CRM0805-FX-R910ELF directly replace the RL73H2AR91FTDF in existing designs?

A: Yes. Both components share identical resistance (910 mOhms), tolerance (±1%), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), package format (0805 / 2012 Metric), and current sense application designation. The CRM0805-FX-R910ELF features a higher power rating (0.25W versus 0.125W), which provides additional thermal capability without affecting electrical performance.

Q: Are there dimensional compatibility concerns between these parts?

A: No significant compatibility issues exist. Both components conform to the 0805 (2012 Metric) package standard. The CRM0805-FX-R910ELF has slightly reduced maximum seated height (0.60mm versus 0.65mm) and marginally narrower width (1.20mm versus 1.25mm), both within standard PCB assembly tolerances. These minor dimensional differences do not affect footprint compatibility or assembly processes.

Q: Do both parts meet the same compliance and certification requirements?

A: Yes. Both the RL73H2AR91FTDF and CRM0805-FX-R910ELF are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are REACH unaffected. Both parts are classified as Active products, ensuring ongoing availability and support.

Q: What is the primary advantage of selecting the CRM0805-FX-R910ELF as a substitute?

A: The CRM0805-FX-R910ELF provides double the power dissipation capability (0.25W versus 0.125W) while maintaining all critical electrical specifications. This upgrade is beneficial in applications where thermal margin is desired or where circuit conditions may approach the original power rating limits.

Q: Are there any electrical performance differences between these resistors?

A: No. Both components deliver identical resistance value (910 mOhms), tolerance (±1%), and temperature coefficient (±100ppm/°C). Electrical performance in current sensing applications remains equivalent across the specified operating temperature range.