ELM 3-555 Equivalent & Substitute Parts

Part Overview

The ELM 3-555 is a T1 3/4 LED standoff manufactured by Bivar Inc., designed for vertical mounting applications. This component features a black PVC construction with a 0.555" (14.10mm) length specification. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling direct replacement in applications where dimensional and material tolerances permit.

Substiute Parts

ELM 3-555

Bivar Inc.In Stock: 1157ELM 3-555 Datasheet

Current PartRFQ

ELM 1-545

Bivar Inc.In Stock: 20142ELM 1-545 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELM 3-555 is determined by the following critical parameters:

Primary Compatibility Criteria:

• LED Type: T1 3/4 (must match exactly)
• Material: Black PVC (must match exactly)
• Mounting Style: Vertical (must match exactly)
• RoHS Compliance: ROHS3 Compliant (must match or exceed)
• MSL Rating: 1 or better (must match or exceed)

Secondary Consideration:

• Length tolerance: Dimensional variation within 0.010" (0.25mm) is permissible for mechanical fit in standard mounting applications

The ELM 1-545 qualifies as a parametric equivalent based on matching LED type, material composition, mounting orientation, and compliance certifications. The length differential of 0.010" (0.26mm) falls within acceptable mechanical tolerance for vertical standoff applications.

Parameter Comparison

Engineering Selection Recommendations

ELM 1-545 Substitution Basis:

The ELM 1-545 is qualified as a direct substitute for the ELM 3-555 based on the following engineering criteria:

1. Functional Equivalence: Both parts share identical LED type (T1 3/4), material composition (Black PVC), and mounting orientation (Vertical), ensuring functional interchangeability in vertical standoff applications.

2. Compliance Alignment: Both parts maintain ROHS3 compliance and MSL 1 rating, meeting identical environmental and regulatory requirements.

3. Dimensional Compatibility: The 0.010" (0.26mm) length differential is within standard mechanical tolerance for LED standoff applications and does not compromise mounting integrity or electrical performance.

4. Production Status: Both parts are in active production with established supply chains, ensuring long-term availability and consistency.

5. Inventory Availability: ELM 1-545 maintains higher inventory levels (20,121 pcs) compared to ELM 3-555 (1,057 pcs), providing supply continuity advantages.

Frequently Asked Questions (FAQ)

Q: What is the primary difference between ELM 3-555 and ELM 1-545?

A: The primary difference is length specification. ELM 3-555 measures 0.555" (14.10mm), while ELM 1-545 measures 0.545" (13.84mm). This 0.010" (0.26mm) variation is within acceptable mechanical tolerance for vertical standoff mounting applications. All other parameters—LED type, material, color, mounting style, and compliance ratings—are identical.

Q: Can ELM 1-545 be used as a direct replacement for ELM 3-555?

A: Yes. ELM 1-545 qualifies as a parametric equivalent substitute. The matching LED type (T1 3/4), material (Black PVC), mounting style (Vertical), and compliance certifications (ROHS3, MSL 1) ensure functional compatibility. The minor length difference does not affect electrical performance or standard mounting applications.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both ELM 3-555 and ELM 1-545 maintain identical RoHS3 compliance status and MSL 1 (Unlimited) moisture sensitivity ratings. Both parts meet the same environmental and regulatory requirements.

Q: What packaging format is used for both parts?

A: Both ELM 3-555 and ELM 1-545 are supplied in Bag packaging, ensuring consistent handling and storage protocols.

Q: Which part should be selected for new designs?

A: Selection between ELM 3-555 and ELM 1-545 depends on specific mechanical clearance requirements. If the 0.555" (14.10mm) length is critical to the application, use ELM 3-555. If the 0.545" (13.84mm) length is acceptable or preferred, ELM 1-545 offers higher inventory availability and supply continuity.

Q: Is the series designation (ELM 3 vs. ELM 1) significant for substitution?

A: Series designation reflects internal Bivar Inc. product line organization but does not affect electrical or mechanical compatibility. Substitution eligibility is determined exclusively by the parameters listed in the Parameter Comparison table.