Ohmite 43F225 Equivalent & Substitute Parts

Part Overview

The Ohmite 43F225 is a 225 Ohm ±1% 3W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production with 820 pieces in stock. Substitute parts are necessary to address supply chain flexibility, packaging preferences, compliance requirements, or specific application needs where alternative manufacturers' offerings meet the same electrical and mechanical specifications.

Substiute Parts

43F225

OhmiteIn Stock: 92443F225 Datasheet

Current PartRFQ

43F225E

OhmiteIn Stock: 118943F225E Datasheet

DirectRFQ

ALSR03225R0FE12

Vishay DaleIn Stock: 1019ALSR03225R0FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43F225 is determined by the following critical parameters:

• Resistance value: 225 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Termination count: 2 (exact match required)

The identified substitute parts meet all mandatory electrical and mechanical criteria. Secondary parameters such as temperature coefficient, physical dimensions, and compliance certifications may vary within acceptable engineering tolerances for axial wirewound resistors of this class.

Parameter Comparison

Engineering Selection Recommendations

43F225E (Ohmite): This part is electrically and mechanically identical to the main part 43F225, with identical dimensions and temperature coefficient. The primary distinction is packaging format (Bulk) and RoHS3 compliance status. Selection of 43F225E is appropriate when RoHS3 compliance is required or when bulk packaging aligns with procurement workflows. Inventory availability is higher at 1118 pieces.

ALSR03225R0FE12 (Vishay Dale): This substitute meets all core electrical specifications (225 Ohms, ±1%, 3W, wirewound, axial). The ALSR series includes moisture-resistant construction and provides a wider operating temperature range (-65°C ~ 250°C). Physical dimensions are smaller (0.180" Dia x 0.500" L versus 0.220" Dia x 0.594" L). Temperature coefficient is ±30ppm/°C, which is 50% higher than the main part. This part is RoHS3 compliant. Selection is appropriate when space constraints favor smaller dimensions, moisture resistance is beneficial, or extended temperature operation is required.

Frequently Asked Questions (FAQ)

Q: Can 43F225E be used as a direct drop-in replacement for 43F225?

A: Yes. The 43F225E is electrically and mechanically identical to 43F225, with the same resistance, tolerance, power rating, composition, package type, and physical dimensions. The only differences are packaging format and RoHS compliance status.

Q: Is ALSR03225R0FE12 a direct drop-in replacement?

A: ALSR03225R0FE12 meets all core electrical requirements but has smaller physical dimensions (0.180" Dia x 0.500" L versus 0.220" Dia x 0.594" L). Verify PCB layout and mechanical clearances before substitution. The temperature coefficient is ±30ppm/°C compared to ±20ppm/°C for the main part; confirm this tolerance is acceptable for your application.

Q: What is the difference between the main part 43F225 and 43F225E?

A: Both parts are from Ohmite's Ohmicone® 40 series with identical electrical and mechanical specifications. The 43F225E is packaged in Bulk format and is RoHS3 compliant, while the main part 43F225 is RoHS non-compliant. Inventory levels differ (1118 pieces for 43F225E versus 820 for 43F225).

Q: When should I select ALSR03225R0FE12 over the Ohmite options?

A: Select ALSR03225R0FE12 when: (1) smaller physical dimensions are required for space-constrained layouts, (2) moisture-resistant construction is specified, (3) extended operating temperature range (-65°C ~ 250°C) is needed, or (4) Vishay Dale supply chain preference exists. Confirm the ±30ppm/°C temperature coefficient meets application tolerances.

Q: Are all three parts RoHS compliant?

A: No. The main part 43F225 is RoHS non-compliant. Both 43F225E and ALSR03225R0FE12 are RoHS3 compliant. Select compliant alternatives if RoHS certification is required for your application or end market.

Q: What are the inventory levels for each part?

A: 43F225 (main): 820 pieces; 43F225E: 1118 pieces; ALSR03225R0FE12: 967 pieces. All parts are listed as new original stock.