Ohmite 45F700 Equivalent & Substitute Parts

Part Overview

The Ohmite 45F700 is a 700 Ohms ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production and maintains 1086 units in stock. The part is classified as RoHS non-compliant and is suitable for applications requiring precision resistive elements in axial package format. Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating) and mechanical compatibility (axial package configuration).

Substiute Parts

45F700

OhmiteIn Stock: 117345F700 Datasheet

Current PartRFQ

ALSR05700R0FE12

Vishay DaleIn Stock: 761ALSR05700R0FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Ohmite 45F700 are qualified based on the following critical parameters:

• Resistance Value: 700 Ohms (exact match required)
• Tolerance: ±1% (precision specification)
• Power Rating: 5W (thermal capability)
• Composition: Wirewound (construction type)
• Package: Axial (mechanical form factor)

The Vishay Dale ALSR05700R0FE12 meets all core electrical and mechanical substitution criteria. Both parts deliver identical resistance, tolerance, power handling, and axial package configuration, enabling direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Ohmite 45F700: Select this part for applications where RoHS non-compliant components are acceptable and the standard temperature coefficient of ±20ppm/°C meets circuit requirements. The part is active in production with established supply availability.

Vishay Dale ALSR05700R0FE12: Select this substitute when RoHS3 compliance is required or when operating environments demand moisture resistance. The tighter temperature coefficient specification (±30ppm/°C) and extended operating temperature range (-65°C ~ 250°C) provide enhanced environmental performance. Physical dimensions are slightly smaller, which may be advantageous in space-constrained layouts. This part is also active in production with confirmed inventory.

Both parts are functionally equivalent for 700 Ohm ±1% 5W axial wirewound resistor applications. Selection between them depends on regulatory compliance requirements and environmental operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale ALSR05700R0FE12 directly replace the Ohmite 45F700?

A: Yes. Both parts share identical electrical specifications (700 Ohms, ±1% tolerance, 5W power rating) and axial package configuration. The Vishay Dale part is a direct functional substitute. Physical dimensions differ slightly (Vishay Dale is marginally smaller), but both fit standard axial component footprints.

Q: What is the difference in temperature coefficient between these parts?

A: The Ohmite 45F700 has a temperature coefficient of ±20ppm/°C, while the Vishay Dale ALSR05700R0FE12 has ±30ppm/°C. For precision applications requiring minimal temperature-dependent resistance drift, the Ohmite part offers superior stability. For general-purpose applications, both coefficients are acceptable.

Q: Does the Vishay Dale part offer any advantages?

A: The Vishay Dale ALSR05700R0FE12 is ROHS3 compliant and includes moisture-resistant construction. It also specifies an operating temperature range of -65°C ~ 250°C, whereas the Ohmite part does not provide this specification. These features make the Vishay Dale part suitable for regulated environments and applications with extended temperature requirements.

Q: Are there any physical installation considerations?

A: The Vishay Dale part is slightly smaller in diameter (0.312" vs 0.343") and length (0.875" vs 0.937"). Both maintain standard axial lead spacing and fit conventional through-hole PCB layouts. Verify clearance in space-constrained designs, though the smaller Vishay Dale dimensions typically present no compatibility issues.

Q: What is the RoHS compliance difference?

A: The Ohmite 45F700 is RoHS non-compliant. The Vishay Dale ALSR05700R0FE12 is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the Vishay Dale part is the appropriate selection.