Ohmite 41F1R5 Equivalent & Substitute Parts

Part Overview

The Ohmite 41F1R5 is a 1.5 Ohm ±1% 1W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision current limiting, load balancing, and power dissipation in electronic circuits. The part maintains active product status with 1147 units in current inventory. Substitute parts are identified when original stock becomes unavailable or when design requirements necessitate alternative sourcing from qualified manufacturers meeting identical electrical and mechanical specifications.

Substiute Parts

41F1R5

OhmiteIn Stock: 123841F1R5 Datasheet

Current PartRFQ

ALSR011R500FE12

Vishay DaleIn Stock: 1236ALSR011R500FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Ohmite 41F1R5 are qualified based on the following critical parameters:

• Resistance value: 1.5 Ohms (exact match required)
• Tolerance: ±1% (precision specification)
• Power rating: 1W (thermal dissipation capability)
• Composition: Wirewound (construction type)
• Temperature coefficient: ±50ppm/°C (stability specification)
• Package: Axial through-hole (mechanical form factor)
• Termination count: 2 (connection points)

The Vishay Dale ALSR011R500FE12 meets all core electrical specifications and maintains compatibility with the original part's functional requirements and PCB footprint constraints.

Parameter Comparison

Engineering Selection Recommendations

Both the Ohmite 41F1R5 and Vishay Dale ALSR011R500FE12 are active products with identical core electrical specifications. The Vishay Dale ALSR011R500FE12 provides ROHS3 compliance, whereas the Ohmite 41F1R5 is RoHS non-compliant. Selection between these parts should be based on regulatory requirements and compliance mandates applicable to the end application. The Vishay Dale part includes moisture-resistant construction and a specified operating temperature range of -65°C to 250°C. Physical dimensions differ slightly; the Vishay Dale part is marginally smaller in diameter and length, which may be advantageous in space-constrained layouts while maintaining axial through-hole compatibility.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale ALSR011R500FE12 be used as a direct replacement for the Ohmite 41F1R5?

A: Yes. Both parts share identical electrical specifications: 1.5 Ohm resistance, ±1% tolerance, 1W power rating, wirewound composition, and ±50ppm/°C temperature coefficient. Both are axial through-hole packages with two terminations. Physical dimensions are similar, with the Vishay Dale part being slightly more compact.

Q: What is the primary difference between these two parts?

A: The Vishay Dale ALSR011R500FE12 is ROHS3 compliant and includes moisture-resistant construction with a specified operating temperature range (-65°C to 250°C). The Ohmite 41F1R5 is RoHS non-compliant. Selection depends on regulatory compliance requirements and environmental operating conditions.

Q: Are there any PCB layout considerations when substituting these parts?

A: Both parts are axial through-hole components with identical termination counts. The Vishay Dale part has slightly smaller physical dimensions (0.110" Dia x 0.406" L versus 0.126" Dia x 0.437" L), which may provide minor layout flexibility. Standard axial resistor footprints accommodate both parts.

Q: What inventory status should I verify before ordering?

A: The Ohmite 41F1R5 has 1147 units in stock. The Vishay Dale ALSR011R500FE12 has 1158 units in stock. Verify current availability with your supplier before finalizing procurement decisions.