43F10R Equivalent & Substitute Parts

Part Overview

The 43F10R is a 10 Ohms ±1% 3W through-hole resistor manufactured by Ohmite in the Ohmicone® 40 series. This axial wirewound resistor is designed for applications requiring precision resistance with high power dissipation capability. The part is currently active in production with 833 pieces available in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when alternative packaging or compliance requirements necessitate component substitution.

Substiute Parts

43F10R

OhmiteIn Stock: 87543F10R Datasheet

Current PartRFQ

ALSR0310R00FE12

Vishay DaleIn Stock: 1545ALSR0310R00FE12 Datasheet

DirectRFQ

RS02B10R00FS70

Vishay DaleIn Stock: 2076RS02B10R00FS70 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43F10R is determined by strict equivalence across the following critical parameters:

• Resistance value: 10 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package type: Axial
• Number of terminations: 2
• Moisture sensitivity level: 1 (Unlimited)

All identified substitute parts meet these core electrical and mechanical requirements. Variations in temperature coefficient, operating temperature range, physical dimensions, packaging format (bulk vs. cut tape), and regulatory compliance status are secondary considerations that do not affect functional interchangeability in standard circuit applications. Substitute parts are grouped as direct equivalents when all primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

All three parts—43F10R, ALSR0310R00FE12, and RS02B10R00FS70—are functionally equivalent for standard circuit applications requiring a 10 Ohms ±1% 3W axial wirewound resistor.

43F10R (Ohmite): Primary part with active production status. Supports the widest operating temperature range (-55°C ~ 275°C) and matches the specified temperature coefficient of ±20ppm/°C. RoHS non-compliant. Suitable for applications with extended high-temperature requirements.

ALSR0310R00FE12 (Vishay Dale): Direct equivalent with RoHS3 compliance. Moisture-resistant construction. Operates within -65°C ~ 250°C range with ±30ppm/°C temperature coefficient. Smaller physical dimensions (4.57mm x 12.70mm) may provide space advantages in compact layouts. Bulk packaging format. Recommended for applications requiring RoHS compliance.

RS02B10R00FS70 (Vishay Dale): Direct equivalent with moisture-resistant construction. Matches the ±20ppm/°C temperature coefficient of the primary part. Operates within -65°C ~ 250°C range. Physical dimensions (4.75mm x 14.22mm) closely approximate the primary part. Cut tape packaging format supports automated assembly processes. RoHS non-compliant. REACH affected. Recommended for high-volume production environments utilizing automated component placement.

Selection between substitute parts should be based on procurement availability, packaging requirements, compliance certifications, and physical space constraints within the target application.

Frequently Asked Questions (FAQ)

Q: Can ALSR0310R00FE12 and RS02B10R00FS70 be used interchangeably with 43F10R in all applications?

A: Yes, for applications requiring a 10 Ohms ±1% 3W axial wirewound resistor. All three parts meet the core electrical specifications. Physical dimension variations are minor and do not affect electrical performance. Verify that operating temperature requirements fall within the specified ranges for each part. ALSR0310R00FE12 operates to 250°C maximum; 43F10R extends to 275°C.

Q: What is the significance of the temperature coefficient difference between 43F10R (±20ppm/°C) and ALSR0310R00FE12 (±30ppm/°C)?

A: Temperature coefficient indicates resistance value drift with temperature change. The 43F10R and RS02B10R00FS70 exhibit ±20ppm/°C, while ALSR0310R00FE12 exhibits ±30ppm/°C. For precision applications operating across wide temperature ranges, the lower coefficient (±20ppm/°C) provides tighter resistance stability. For standard industrial applications, both coefficients are acceptable.

Q: How do packaging format differences affect component selection?

A: 43F10R is supplied in box packaging; ALSR0310R00FE12 in bulk; RS02B10R00FS70 in cut tape. Box and bulk formats support manual assembly and small-volume production. Cut tape format is optimized for automated pick-and-place assembly in high-volume manufacturing. Select packaging based on assembly process requirements and production volume.

Q: What is the impact of RoHS compliance status on part selection?

A: ALSR0310R00FE12 is RoHS3 compliant; 43F10R and RS02B10R00FS70 are RoHS non-compliant. RoHS compliance is mandatory for products sold in the European Union and many other regulated markets. Select ALSR0310R00FE12 for applications requiring RoHS certification. For non-regulated markets or legacy systems, RoHS non-compliant parts are acceptable.

Q: Are physical dimension differences between substitute parts critical?

A: Physical dimensions vary slightly: 43F10R (5.60mm x 15.10mm), ALSR0310R00FE12 (4.57mm x 12.70mm), RS02B10R00FS70 (4.75mm x 14.22mm). These differences are minor and do not affect electrical performance. Verify PCB layout and component spacing accommodate the selected part's dimensions. Smaller dimensions of ALSR0310R00FE12 may provide advantages in space-constrained designs.

Q: Can these parts be used in high-temperature applications above 250°C?

A: 43F10R supports operation to 275°C. ALSR0310R00FE12 and RS02B10R00FS70 are rated to 250°C maximum. For applications requiring sustained operation above 250°C, 43F10R is the appropriate selection.