RN732BTTD4373C25 Equivalent & Substitute Parts

Part Overview

The RN732BTTD4373C25 is a 437 kOhms ±0.25% thin film chip resistor manufactured by KOA Speer Electronics, Inc. in 1206 (3216 Metric) package format with 0.125W power rating. This component is classified as obsolete product status. Locating equivalent and substitute parts is necessary due to discontinued availability and the need for continued supply chain support in applications requiring this resistance value and tolerance specification.

Substiute Parts

RN732BTTD4373C25

KOA Speer Electronics, Inc.In Stock: 908RN732BTTD4373C25 Datasheet

Current PartRFQ

RN73R2BTTD4373C25

KOA Speer Electronics, Inc.In Stock: 1021RN73R2BTTD4373C25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732BTTD4373C25 is determined by strict equivalence in the following parameters:

• Resistance value: 437 kOhms (exact match required)
• Tolerance: ±0.25% (exact match required)
• Package / Case: 1206 (3216 Metric) (exact match required)
• Composition: Thin Film (exact match required)
• Temperature Coefficient: ±25ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)

The substitute part RN73R2BTTD4373C25 meets all these criteria. The primary difference is an increased power rating (0.25W versus 0.125W), which represents a higher capability and does not restrict substitution. The substitute part also includes automotive AEC-Q200 qualification, an additional certification not present in the original part.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2BTTD4373C25 is the direct substitute for the obsolete RN732BTTD4373C25. Both parts maintain identical electrical specifications for resistance, tolerance, temperature coefficient, and operating temperature range. The substitute part carries active product status, ensuring continued availability and supply chain support.

The increased power rating of the substitute part (0.25W versus 0.125W) provides enhanced thermal capability without affecting circuit performance in applications designed for the original 0.125W specification. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

The substitute part includes automotive AEC-Q200 qualification, which certifies reliability for automotive applications. This additional qualification does not restrict use in non-automotive applications and represents an enhancement to the original part's specification profile.

Frequently Asked Questions (FAQ)

Q: Can RN73R2BTTD4373C25 be used as a direct replacement for RN732BTTD4373C25?

A: Yes. Both parts share identical resistance value (437 kOhms), tolerance (±0.25%), package format (1206), composition (thin film), temperature coefficient (±25ppm/°C), and operating temperature range (-55°C ~ 155°C). The substitute part's higher power rating does not restrict substitution in circuits designed for the original part.

Q: What is the significance of the increased power rating in the substitute part?

A: The substitute part is rated for 0.25W compared to the original 0.125W. This represents increased thermal dissipation capability. In applications where the original part operates within its 0.125W specification, the substitute part will operate at lower thermal stress, which is compatible with the original design.

Q: Does the automotive AEC-Q200 qualification on the substitute part affect non-automotive applications?

A: No. Automotive AEC-Q200 qualification represents an additional reliability certification. This qualification does not restrict the part's use in non-automotive applications and does not alter its electrical or mechanical characteristics.

Q: Are the physical dimensions identical between the two parts?

A: Yes. Both parts are packaged in 1206 (3216 Metric) format with identical dimensions: 0.126" L x 0.063" W (3.20mm x 1.60mm) and maximum seated height of 0.028" (0.70mm).

Q: What is the product status difference, and why does it matter?

A: The original part (RN732BTTD4373C25) is classified as obsolete, while the substitute (RN73R2BTTD4373C25) is active. Active status ensures continued manufacturing and availability for future procurement needs.

Q: Are both parts RoHS compliant?

A: Yes. Both parts are ROHS3 compliant and carry REACH Unaffected status, meeting current environmental and regulatory requirements.