SG314 Inrush Current Limiter - Equivalent & Substitute Parts

Part Overview

The SG314 is an inrush current limiter manufactured by Ametherm, part of the SURGE-GARD™ series. This component is designed to limit inrush current in electrical circuits, with a nominal resistance of 10 Ohms at ±15% tolerance and a maximum steady-state current rating of 6 A. The part is currently in active production status with 1146 units in stock. Substitute parts are identified when equivalent electrical performance is required due to inventory constraints, application-specific packaging needs, or regional availability considerations.

Substiute Parts

SG314

AmethermIn Stock: 1245SG314 Datasheet

Current PartRFQ

B57364S0100M000

EPCOS - TDK ElectronicsIn Stock: 5034B57364S0100M000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SG314 is permissible when the following core electrical parameters are maintained or exceeded:

• Resistance value: 10 Ohms (tolerance variance acceptable within application limits)
• Steady-state current rating: minimum 6 A
• RoHS3 compliance status
• Regulatory approvals compatible with end-use application

The B57364S0100M000 qualifies as a substitute based on matching the 10 Ohm resistance specification and exceeding the steady-state current requirement at 7.5 A. Physical dimensions differ; mechanical fit verification is required for specific mounting applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SG314 and B57364S0100M000 maintain ROHS3 compliance and active production status. The B57364S0100M000 provides higher steady-state current capacity (7.5 A versus 6 A), making it suitable for applications requiring additional thermal margin. The tolerance specification widens from ±15% to ±20% with the substitute part; circuit design must accommodate this variance if precision resistance is critical.

Regulatory approvals differ between manufacturers. The SG314 carries CSA and UR certifications, while the B57364S0100M000 carries CQC, UL, and VDE certifications. Selection should align with regional compliance requirements for the end application.

Physical dimensions are not interchangeable. The B57364S0100M000 is significantly larger (0.827" diameter versus 0.500"), requiring mechanical fit verification in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the B57364S0100M000 directly replace the SG314 in all applications?

A: Electrical substitution is valid when the application tolerates ±20% resistance variance and does not require the specific regulatory certifications of the original part. Mechanical fit must be verified independently, as the substitute part has a larger diameter and different lead spacing.

Q: What is the significance of the tolerance difference between ±15% and ±20%?

A: The SG314 maintains tighter resistance tolerance at ±15%, while the B57364S0100M000 allows ±20% variance. Applications with strict inrush current limiting requirements must evaluate whether the wider tolerance of the substitute part remains within acceptable circuit performance parameters.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the SG314 and B57364S0100M000 are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements for EU and equivalent markets.

Q: Which regulatory certifications should I prioritize for my application?

A: Selection depends on end-use geography and industry standards. The SG314 carries CSA and UR approvals; the B57364S0100M000 carries CQC, UL, and VDE approvals. Verify that the substitute part's certifications satisfy your application's regional and industry-specific requirements.

Q: Does the higher current rating of the B57364S0100M000 affect circuit behavior?

A: The 7.5 A rating of the B57364S0100M000 versus the 6 A rating of the SG314 indicates higher thermal capacity. This does not alter inrush current limiting function but provides additional safety margin in applications approaching the original part's current limit.