SMP4-SBC LED Green/Red Clear 4PLCC SMD Equivalent & Substitute Parts

Part Overview

The SMP4-SBC is a dual-color surface mount LED indicator manufactured by Bivar Inc., featuring independent green and red LEDs in a 4-PLCC package. This component is classified as obsolete, indicating discontinued production and limited availability in the supply chain. The SMP4-SBC provides green indication at 574nm wavelength and red indication at 631nm wavelength, with a clear colorless lens and 120° viewing angle suitable for panel-mount LED indicator applications.

Due to its obsolete status, identifying parametrically equivalent active production alternatives is essential for design continuity and long-term supply chain reliability.

Substiute Parts

SMP4-SBC

Bivar Inc.In Stock: 1895SMP4-SBC Datasheet

Current PartRFQ

SMTL4-SBC

Bivar Inc.In Stock: 16715SMTL4-SBC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMP4-SBC is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Forward voltage (1.9V for both colors), test current (20mA for both colors), and wavelength specifications (574nm green, 631nm red) must remain identical to ensure circuit compatibility without redesign.

Optical Parameters: Millicandela ratings (115mcd green, 180mcd red), lens color (colorless), lens transparency (clear), and viewing angle (120°) must match to preserve indicator visibility and application performance.

Mechanical Parameters: Package type (4-PLCC), lens style (round with flat top), lens diameter (2.40mm), and overall dimensions (3.20mm L x 2.80mm W) must be identical for PCB layout and mechanical assembly compatibility.

Environmental Parameters: Moisture sensitivity level (MSL 4) and packaging format (Tape & Reel) must align with manufacturing and storage requirements.

The SMTL4-SBC meets all these criteria as a parametric equivalent with active production status.

Parameter Comparison

Engineering Selection Recommendations

The SMTL4-SBC is the direct parametric equivalent for the obsolete SMP4-SBC. All electrical, optical, and mechanical specifications are identical, ensuring drop-in compatibility without circuit or layout modifications.

Product Status Advantage: The SMTL4-SBC maintains active production status with significantly higher inventory availability (16,623 pcs vs. 1,840 pcs), providing superior long-term supply chain security.

Compliance Status: The SMTL4-SBC carries ROHS3 compliance certification and REACH unaffected status, meeting current regulatory requirements for new designs and manufacturing environments.

Height Tolerance: The SMTL4-SBC maximum height is 2.05mm compared to 1.95mm for the SMP4-SBC. This 0.10mm difference remains within standard PCB assembly tolerances and does not affect mechanical fit or electrical performance.

Selection Basis: Selection of the SMTL4-SBC is based on parametric equivalence, active production status, regulatory compliance, and supply chain availability. No design modifications are required for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the SMTL4-SBC replace the SMP4-SBC in existing designs without PCB layout changes?

A: Yes. The SMTL4-SBC is parametrically identical in all critical dimensions (3.20mm L x 2.80mm W), package type (4-PLCC), and mounting specifications. PCB footprints and assembly processes require no modification.

Q: What is the significance of the 0.10mm height difference between the two parts?

A: The SMP4-SBC has a maximum height of 1.95mm while the SMTL4-SBC is 2.05mm. This difference is within standard PCB assembly tolerances and does not affect mechanical clearance, electrical performance, or optical characteristics.

Q: Are the electrical specifications identical between the two parts?

A: Yes. Both parts operate at 1.9V forward voltage for green and red LEDs, require 20mA test current, and produce identical wavelengths (574nm green, 631nm red) and brightness levels (115mcd green, 180mcd red).

Q: Why is the SMTL4-SBC recommended over the SMP4-SBC?

A: The SMTL4-SBC is recommended because it maintains active production status, carries ROHS3 compliance certification, and has significantly higher inventory availability. The SMP4-SBC is classified as obsolete with limited stock.

Q: Are there any compliance differences between the two parts?

A: The SMTL4-SBC carries ROHS3 compliance and REACH unaffected status. The SMP4-SBC compliance information is not specified. For new designs and manufacturing environments subject to current regulatory requirements, the SMTL4-SBC is the appropriate selection.

Q: What is the Moisture Sensitivity Level (MSL) for both parts?

A: Both the SMP4-SBC and SMTL4-SBC are rated MSL 4 (72 Hours), indicating identical moisture handling and storage requirements during manufacturing and assembly.

Q: Can the SMTL4-SBC be used in applications requiring the exact 1.95mm height specification?

A: The SMTL4-SBC maximum height of 2.05mm exceeds the SMP4-SBC specification by 0.10mm. Applications with strict height constraints below 2.05mm should evaluate clearance requirements. For standard applications, this difference is within assembly tolerances.