SLM-340 Equivalent & Substitute Parts Reference

Part Overview

The SLM-340 is a T1/T1 3/4 LED standoff manufactured by Bivar Inc., constructed from black nylon with a length of 0.340" (8.64mm). This component is classified as an active product and serves as a mechanical support and alignment fixture for LED assemblies in electronic equipment. The part maintains ROHS3 compliance and carries an MSL rating of 1 (Unlimited), indicating minimal moisture sensitivity during storage and handling.

Substitute parts become necessary when the primary manufacturer experiences supply constraints, extended lead times, or when design requirements permit dimensional or material variations within acceptable engineering tolerances. The substitute parts listed below maintain functional equivalence through matching LED form factors, material composition, and compliance certifications.

Substiute Parts

SLM-340

Bivar Inc.In Stock: 1079SLM-340 Datasheet

Current PartRFQ

705820085

Würth ElektronikIn Stock: 2009705820085 Datasheet

Parametric EquivalentRFQ

705820090

Würth ElektronikIn Stock: 4332705820090 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLM-340 are qualified based on the following criteria:

Matching Parameters (Required for Substitution):

• LED form factor: T1, T1 3/4 (identical)
• Material: Black Nylon (identical)
• Color: Black (identical)
• RoHS compliance: ROHS3 Compliant (identical)
• Product status: Active (identical)

Allowable Variation:

• Length tolerance: ±0.015" (±0.38mm) from nominal 0.340" (8.64mm)

The substitute parts 705820085 and 705820090, both manufactured by Würth Elektronik, meet all matching parameters. Both parts are constructed from nylon material with UL94 V-2 flame rating, maintain ROHS3 compliance, and support the same T1/T1 3/4 LED form factors. Length variations fall within acceptable mechanical tolerances for LED standoff applications where minor height adjustments do not compromise circuit board layout or component clearance requirements.

Parameter Comparison

Engineering Selection Recommendations

SLM-340 (Primary Selection): Select the SLM-340 when the nominal standoff height of 0.340" (8.64mm) is specified in the design documentation and no dimensional tolerance adjustment is required. This part maintains active product status with established supply channels through Bivar Inc.

705820085 (Substitute - Shorter Height): The 705820085 provides a 0.005" (0.14mm) reduction in standoff height compared to the SLM-340. This substitute is suitable for applications where minor height reduction does not affect PCB layout, component clearance, or electrical performance. The Würth Elektronik part carries UL94 V-2 flame rating and ROHS3 compliance, with higher current inventory availability (1971 Pcs).

705820090 (Substitute - Taller Height): The 705820090 provides a 0.014" (0.36mm) increase in standoff height compared to the SLM-340. This substitute is suitable for applications requiring additional clearance between the LED component and the PCB surface. The Würth Elektronik part carries UL94 V-2 flame rating and ROHS3 compliance, with the highest current inventory availability (4259 Pcs).

All three parts maintain identical LED form factor compatibility, material composition (nylon), color specification (black), and regulatory compliance (ROHS3). Selection between substitutes depends solely on the allowable height tolerance within the specific application's mechanical design constraints.

Frequently Asked Questions (FAQ)

Q: Can 705820085 or 705820090 be used as direct replacements for SLM-340?

A: Yes, both Würth Elektronik parts are parametric equivalents. The 705820085 is 0.005" shorter and the 705820090 is 0.014" taller than the SLM-340. Direct substitution is valid when the application design permits these height variations without affecting PCB layout, component spacing, or electrical clearance requirements.

Q: What is the significance of the length difference between the three parts?

A: Length determines the standoff height between the LED component and the PCB surface. The SLM-340 at 0.340" (8.64mm) is the nominal specification. The 705820085 at 0.335" (8.50mm) reduces clearance by 0.005", while the 705820090 at 0.354" (9.00mm) increases clearance by 0.014". Selection depends on the mechanical design tolerance and required component spacing in the assembly.

Q: Are all three parts RoHS compliant?

A: Yes. The SLM-340 is ROHS3 compliant. Both substitute parts (705820085 and 705820090) are also ROHS3 compliant, meeting identical regulatory requirements for hazardous substance restrictions.

Q: What is the difference between standard nylon and Nylon 66 used in the substitute parts?

A: Both materials are nylon-based polymers suitable for LED standoff applications. Nylon 66 (used in Würth Elektronik parts) is a specific polyamide formulation with defined mechanical and thermal properties. The functional performance in LED standoff applications is equivalent across all three parts.

Q: How do the packaging and inventory levels compare?

A: All three parts are supplied in bag packaging. Current inventory shows SLM-340 at 1058 Pcs, 705820085 at 1971 Pcs, and 705820090 at 4259 Pcs. Higher inventory availability may influence lead time considerations in procurement decisions.

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

A: No. These components function as mechanical standoffs and do not carry electrical current or signals. Electrical performance is determined by the LED components mounted on the standoffs, not by the standoff material or geometry within the specified tolerance range.

Q: What does MSL 1 (Unlimited) mean for the SLM-340?

A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component can be stored indefinitely without special moisture control measures. This classification applies to the SLM-340 and does not restrict handling or storage procedures.