ELM 3-845 LED Standoff Equivalent & Substitute Parts

Part Overview

The ELM 3-845 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 length of 0.845" (21.46mm) and is classified as an active product. Finding equivalent substitute parts becomes necessary when the primary part number is unavailable in inventory, when supply chain disruptions occur, or when alternative sourcing is required to maintain production schedules.

Substiute Parts

ELM 3-845

Bivar Inc.In Stock: 819ELM 3-845 Datasheet

Current PartRFQ

ELM 1-820

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The ELM 1-820 is identified as a parametric equivalent to the ELM 3-845. Substitution between these parts is based on the following key parameters:

• LED Type: Both parts utilize T1 3/4 LED specifications, ensuring compatible mounting and optical performance characteristics.
• Material: Both components feature black PVC construction, providing identical environmental resistance and mechanical properties.
• Moisture Sensitivity Level: Both parts are classified as MSL 1 (Unlimited), indicating equivalent handling and storage requirements.
• RoHS Compliance: Both parts meet ROHS3 compliance standards, satisfying regulatory requirements for the same application contexts.
• Color: Both standoffs are black, maintaining consistent aesthetic and mechanical compatibility.

The primary dimensional difference is the length specification: 0.845" (21.46mm) for the ELM 3-845 versus 0.820" (20.83mm) for the ELM 1-820, a variance of 0.025" (0.63mm).

Parameter Comparison

Engineering Selection Recommendations

Both the ELM 3-845 and ELM 1-820 maintain active product status with identical ROHS3 compliance and MSL 1 certification. The ELM 1-820 provides superior availability with 1983 pieces in stock compared to 796 pieces for the ELM 3-845. Selection between these components should be based on mechanical tolerance requirements related to the 0.025" length differential. Applications with strict height clearances or spacing constraints may require evaluation of this dimensional variance within the specific PCB or mounting assembly design.

Frequently Asked Questions (FAQ)

Q: Can the ELM 1-820 directly replace the ELM 3-845 in my design? A: Both parts share identical LED type (T1 3/4), material (black PVC), color, RoHS compliance, and moisture sensitivity specifications. The primary consideration is the length difference of 0.025" (0.63mm). Substitution feasibility depends on your assembly's height tolerance and mechanical clearance requirements.

Q: What is the significance of the length difference between these parts? A: The ELM 3-845 measures 0.845" (21.46mm) while the ELM 1-820 measures 0.820" (20.83mm). This 0.025" variance may affect vertical spacing in high-density assemblies or applications with constrained mounting depth. Mechanical design validation is necessary if your application has specific height requirements.

Q: Are the manufacturing and compliance specifications identical? A: Yes. Both components are manufactured by Bivar Inc., carry ROHS3 certification, maintain MSL 1 moisture sensitivity ratings, and use identical material compositions. They meet the same regulatory and environmental compliance standards.

Q: Why is the ELM 1-820 listed as a substitute despite the length difference? A: The ELM 1-820 is classified as a parametric equivalent because it maintains all critical functional parameters: LED type, material composition, color, and compliance certifications. The length differential is documented to enable informed engineering evaluation within specific application constraints.

Q: Should I consider inventory availability in my selection? A: Inventory status is a supply chain consideration independent of electrical and mechanical equivalence. The ELM 1-820 currently provides 1983 pieces in stock versus 796 for the ELM 3-845. Availability should factor into sourcing decisions when both parts meet your technical requirements.