ERM 1-870

Part Overview

The ERM 1-870 is an LED standoff manufactured by Bivar Inc., designed for mounting 2 and 3 lead LEDs in universal applications. This component features a black PVC construction with a 0.870" (22.10mm) vertical height and is actively supported. Identifying substitute parts becomes necessary when the primary part is unavailable from inventory or when operational requirements permit the use of mechanically compatible alternatives within the specified parameter tolerances.

Substiute Parts

ERM 1-870

Bivar Inc.In Stock: 1073ERM 1-870 Datasheet

Current PartRFQ

ERM 1-21MM

Bivar Inc.In Stock: 15916ERM 1-21MM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ERM 1-870 with the ERM 1-21MM is permitted based on the following strictly defined parameters:

Allowed Substitution Parameters:

• Manufacturer: Bivar Inc. (identical)
• Series: ERM 1 (identical)
• LED Type: 2 and 3 Lead LEDs (identical)
• Material: PVC (identical)
• Color: Black (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)
• Packaging: Bag (identical)

Mechanical Tolerance Parameter:

• Length: 0.870" (22.10mm) for ERM 1-870 versus 0.830" (21.08mm) for ERM 1-21MM, representing a 0.040" (1.02mm) height differential

The ERM 1-21MM qualifies as a parametric equivalent based on shared electrical, material, and compliance characteristics. The mechanical length difference of approximately 1.02mm falls within acceptable tolerance for universal LED mounting applications where vertical standoff height permits minor variation.

Parameter Comparison

Engineering Selection Recommendations

Both the ERM 1-870 and ERM 1-21MM maintain Active product status with continuous manufacturer support. Both components carry ROHS3 compliance certification and identical Moisture Sensitivity Level ratings. The primary differentiating factor is the mechanical height specification: the ERM 1-870 provides 0.870" standoff height while the ERM 1-21MM provides 0.830" standoff height. Component selection should be based on specific board-to-LED clearance requirements. Where the 1.02mm height differential does not violate design constraints, either part satisfies equivalent functional and compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can ERM 1-21MM be used in place of ERM 1-870? A: Yes, provided the circuit board layout permits the 0.040" (1.02mm) reduction in standoff height. Both components share identical electrical characteristics, material composition, and compliance ratings.

Q: Are there mechanical compatibility concerns? A: No mechanical compatibility issues exist beyond the specified height difference. Both parts accommodate identical 2 and 3 lead LED types and feature identical PVC construction.

Q: Do both parts carry the same certifications? A: Yes. Both the ERM 1-870 and ERM 1-21MM are ROHS3 compliant with identical Moisture Sensitivity Level ratings (MSL 1 - Unlimited).

Q: What is the practical tolerance implication of the 1.02mm height difference? A: The height difference represents approximately 4.6% variation relative to the ERM 1-870 specification. Design validation is required to confirm this differential does not violate clearance or spacing constraints in the target application.

Q: Are both parts from the same manufacturer? A: Yes. Both parts are manufactured by Bivar Inc. and belong to the ERM 1 product series, ensuring consistent design and quality standards across the substitution relationship.