ELM 1-21MM

Part Overview

The ELM 1-21MM is a T1 3/4 LED standoff manufactured by Bivar Inc., constructed from black PVC material with a height of 0.830" (21.08mm). This component is classified as an active product with ROHS3 compliance and is designed for vertical mounting applications in LED assemblies. The identification of substitute parts becomes necessary when the primary part is unavailable from inventory, when project design flexibility is required, or when alternative sourcing is needed to maintain supply chain continuity.

Substiute Parts

ELM 1-21MM

Bivar Inc.In Stock: 864ELM 1-21MM Datasheet

Current PartRFQ

ELM 1-820

Bivar Inc.In Stock: 2082ELM 1-820 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELM 1-21MM with the ELM 1-820 is permissible based on the following electrical and mechanical parameters:

Common Parameters Enabling Substitution:

• Identical LED type: T1 3/4
• Identical material: PVC
• Identical color: Black
• Identical manufacturer: Bivar Inc.
• Identical series: ELM 1
• Identical RoHS compliance: ROHS3 Compliant
• Identical MSL rating: 1 (Unlimited)

Dimensional Consideration:

• Length tolerance range: The ELM 1-21MM specifies 0.830" (21.08mm), while the ELM 1-820 specifies 0.820" (20.83mm), representing a 0.010" (0.25mm) difference within acceptable mechanical interchangeability for standoff applications.

Parameter Comparison

Engineering Selection Recommendations

Both the ELM 1-21MM and ELM 1-820 are active products manufactured by Bivar Inc. with identical ROHS3 compliance and MSL ratings. Selection between these parts should be based on:

Availability: The ELM 1-820 maintains higher inventory levels (1983 Pcs) compared to the ELM 1-21MM (809 Pcs), making it a preferred choice when immediate fulfillment is required.

Compliance: Both parts meet ROHS3 environmental compliance standards and carry identical ECCN (EAR99) and HTSUS (8547.20.0000) classifications, presenting no regulatory differentiation.

Design Constraint Verification: The 0.010" (0.25mm) length difference between the two parts must be evaluated against specific application height requirements. If the design accommodates this tolerance, either part is functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can the ELM 1-820 be used as a direct substitute for the ELM 1-21MM? A: Yes, the ELM 1-820 is functionally equivalent. Both parts share identical LED type, material composition, color, RoHS compliance, and MSL rating. The 0.010" (0.25mm) difference in length must be verified against your specific assembly height tolerance.

Q: What is the primary difference between these two parts? A: The only measured difference is the standoff length. The ELM 1-21MM is 0.830" (21.08mm) tall, while the ELM 1-820 is 0.820" (20.83mm) tall. All other electrical and mechanical specifications are identical.

Q: Are both parts available in the same packaging format? A: Yes. Both the ELM 1-21MM and ELM 1-820 are supplied in bag packaging, ensuring consistency in component handling and storage requirements.

Q: What are the moisture sensitivity considerations for these standoffs? A: Both parts carry an MSL rating of 1 (Unlimited), indicating that moisture sensitivity is not a limiting factor during storage, handling, or assembly processes.

Q: How should I verify compatibility in my specific design? A: Review your PCB layout and mechanical assembly drawings to confirm that the 0.010" (0.25mm) length tolerance is acceptable for your standoff mounting application. Both parts are mechanically and electrically compatible when this dimensional constraint is satisfied.