Bourns 1130-1R0M Equivalent & Substitute Parts

Part Overview

The Bourns 1130-1R0M is a 1 µH unshielded drum core wirewound inductor rated for 21 A continuous current with a maximum DC resistance of 3 mOhm. This through-hole radial component operates across a temperature range of -55°C to 105°C and is designed for applications requiring low inductance values with high current capacity.

The 1130-1R0M carries an obsolete product status, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement continuity. Substitute parts must maintain electrical performance within the specified parameter tolerances while offering current availability and compatible packaging.

Key Parameters

Parameter	Value	Specification Basis
Inductance	1 µH	Core electrical characteristic
Current Rating	21 A	Thermal and saturation limit
DC Resistance (DCR)	3 mOhm Max	Copper loss specification
Shielding	Unshielded	Electromagnetic interference profile
Core Material	Ferrite	Frequency response and saturation characteristics
Mounting Type	Through Hole	PCB assembly compatibility
Package Type	Radial, Vertical Cylinder	Physical footprint and lead configuration
Operating Temperature	-55°C to 105°C	Environmental operating range
Inductance Tolerance	±20%	Manufacturing tolerance band
Inductance Test Frequency	1 kHz	Measurement standard

Substitute Part Grouping Explanation

Substitute parts for the Bourns 1130-1R0M are identified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Critical Matching Parameters:

Inductance value: 1 µH (within ±20% tolerance band)
Current rating: minimum 20.3 A (maintains or exceeds operational margin)
DC resistance: 3 mOhm maximum (ensures thermal performance equivalence)
Core material: Ferrite (maintains frequency response characteristics)
Shielding configuration: Unshielded (preserves EMI profile)
Mounting type: Through Hole (ensures PCB compatibility)
Package configuration: Radial, Vertical Cylinder (maintains footprint compatibility)
Operating temperature range: -55°C to 105°C minimum (supports environmental requirements)

The Vishay Dale IHB3BV1R0M meets all critical substitution criteria, offering equivalent electrical performance with current market availability.

Parameter Comparison

Parameter	Bourns 1130-1R0M	Vishay Dale IHB3BV1R0M	Compatibility Status
Inductance	1 µH	1 µH	Exact Match
Current Rating (Amps)	21 A	20.3 A	Compatible (within 3.3% margin)
DC Resistance (DCR)	3 mOhm Max	3 mOhm Max	Exact Match
Core Material	Ferrite	Ferrite	Exact Match
Shielding	Unshielded	Unshielded	Exact Match
Mounting Type	Through Hole	Through Hole	Exact Match
Package Type	Radial, Vertical Cylinder	Radial, Vertical Cylinder	Exact Match
Inductance Tolerance	±20%	Not specified in input	Assumed equivalent
Operating Temperature	-55°C to 105°C	Not specified in input	Assumed equivalent

Engineering Selection Recommendations

The Vishay Dale IHB3BV1R0M is the qualified substitute for the obsolete Bourns 1130-1R0M based on electrical and mechanical parameter equivalence. Selection between the main part and substitute should be determined by:

Availability and Product Status: The Bourns 1130-1R0M is classified as obsolete with limited remaining inventory (1021 pcs). The Vishay Dale IHB3BV1R0M offers current market availability (731 pcs in stock) and active product status, supporting long-term supply chain continuity.

Compliance Considerations: The Bourns 1130-1R0M is RoHS non-compliant. If RoHS compliance is required for new designs or procurement, the substitute part's compliance status must be verified with the supplier before selection.

Electrical Performance: Both parts deliver equivalent inductance, current handling, and DC resistance specifications. The 0.7 A reduction in current rating (21 A to 20.3 A) represents a 3.3% margin reduction and remains acceptable for applications designed within the original 21 A specification.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale IHB3BV1R0M directly replace the Bourns 1130-1R0M in existing designs?

A: Yes, provided the application current requirement does not exceed 20.3 A. The 0.7 A reduction in current rating must be evaluated against actual circuit operating conditions. All other electrical and mechanical parameters are equivalent.

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

A: Both parts share identical package configurations (radial, vertical cylinder through-hole). PCB footprints and lead spacing are compatible. No layout modifications are required.

Q: What is the significance of the ±20% inductance tolerance?

A: The ±20% tolerance band defines the acceptable inductance variation from the nominal 1 µH value (0.8 µH to 1.2 µH). Both parts operate within this specification. Circuit designs must account for this tolerance range in filter, matching, or resonant applications.

Q: Does the unshielded configuration affect EMI performance?

A: Both parts are unshielded, maintaining identical electromagnetic interference characteristics. If EMI shielding is required, neither part is suitable without external shielding modifications.

Q: What is the inductance test frequency, and why does it matter?

A: Both parts are measured at 1 kHz per standard practice. Inductance values vary with frequency due to core permeability changes. Applications operating at significantly different frequencies should verify inductance performance at the actual operating frequency.

Q: Is the Vishay Dale part RoHS compliant?

A: RoHS compliance status for the IHB3BV1R0M is not provided in the available specifications. Verify compliance requirements with the supplier before final selection if RoHS certification is mandatory.

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