ELM 4-950 LED Standoff Equivalent & Substitute Parts

Part Overview

The ELM 4-950 is a T1 LED standoff manufactured by Bivar Inc., designed for vertical mounting applications with a 0.950" (24.13mm) length. This component is constructed from black PVC material and accommodates 3mm LED configurations with 2-lead connections. The part maintains Active product status and is ROHS3 compliant, making it suitable for current production environments.

Substitute parts become necessary when the primary part experiences inventory constraints, extended lead times, or when design specifications allow for minor dimensional variations within acceptable tolerances. The ELM 4-950 has one identified parametric equivalent that maintains functional compatibility across critical electrical and mechanical parameters.

Substiute Parts

ELM 4-950

Bivar Inc.In Stock: 1088ELM 4-950 Datasheet

Current PartRFQ

ELM 5-23MM

Bivar Inc.In Stock: 7185ELM 5-23MM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The ELM 4-950 has one identified parametric equivalent: ELM 5-23MM. This substitute relationship is established based on the following critical parameters that determine functional interchangeability:

Matching Parameters:

• LED Type: Both parts accommodate T1 LED form factors
• Material Composition: Both constructed from black PVC
• Configuration: Both support 3mm LED with 2-lead connections
• Mounting Orientation: Both designed for vertical mounting
• RoHS Compliance: Both ROHS3 compliant
• Moisture Sensitivity Level: Both rated MSL 1 (Unlimited)
• Manufacturer: Both produced by Bivar Inc.

Dimensional Variance: The primary difference between these parts is the standoff length. The ELM 4-950 provides 0.950" (24.13mm) height, while the ELM 5-23MM provides 0.910" (23.11mm) height. This 0.040" (1.02mm) difference represents a 4.2% reduction in vertical clearance and must be evaluated against specific PCB layout and component clearance requirements in the target application.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (ELM 4-950): The ELM 4-950 is the specified component and should be used when design requirements explicitly call for 0.950" (24.13mm) vertical standoff height. This part maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity rating, supporting both current production and long-term supply chain stability.

Substitute Part Selection (ELM 5-23MM): The ELM 5-23MM serves as a parametric equivalent when the 0.040" (1.02mm) reduction in standoff height does not compromise PCB layout, component clearance, or visual alignment requirements. This substitute is appropriate when:

• PCB design accommodates the reduced vertical clearance
• Component spacing and trace routing do not require the additional 0.040" height
• Visual alignment of the LED standoff does not impact product aesthetics or functionality

Both parts maintain identical electrical characteristics, material properties, and regulatory compliance. The selection between these parts is determined solely by the mechanical height requirement of the specific application.

Frequently Asked Questions (FAQ)

Q: Can ELM 5-23MM be used as a direct replacement for ELM 4-950?

A: ELM 5-23MM is a parametric equivalent that shares all critical electrical and material specifications with ELM 4-950. However, the 0.040" (1.02mm) difference in standoff length must be evaluated against the specific PCB design. Direct substitution is possible only when this dimensional variance does not affect component clearance, trace routing, or assembly requirements.

Q: What is the significance of the T1 LED type designation?

A: T1 designates the physical form factor of the LED that the standoff accommodates. Both the ELM 4-950 and ELM 5-23MM are designed to support T1 LEDs with 2-lead configurations in 3mm packages. This ensures mechanical compatibility and proper electrical connection.

Q: Are both parts suitable for RoHS-compliant applications?

A: Yes. Both ELM 4-950 and ELM 5-23MM carry ROHS3 compliance certification, making them suitable for applications requiring adherence to Restriction of Hazardous Substances regulations.

Q: What does Moisture Sensitivity Level 1 (Unlimited) mean?

A: MSL 1 (Unlimited) indicates that these components have no moisture sensitivity restrictions. They do not require special storage conditions, desiccant packaging, or bake-out procedures prior to assembly, simplifying inventory management and handling procedures.

Q: How should the dimensional difference be evaluated in my design?

A: The 0.040" (1.02mm) height difference between ELM 4-950 and ELM 5-23MM should be assessed against your PCB layout drawings, component placement requirements, and any clearance constraints. Measure the available vertical space above the LED standoff location and confirm that the reduced height of ELM 5-23MM does not interfere with adjacent components or assembly processes.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts are mechanical standoffs designed to position T1 LEDs vertically on PCBs. Electrical performance is determined by the LED component itself, not the standoff. The standoff material (black PVC) and configuration are identical between both parts.

Q: What packaging format is used for these parts?

A: Both ELM 4-950 and ELM 5-23MM are supplied in Bag packaging, suitable for standard component handling and storage procedures.