SMP4-SBC-YG Equivalent & Substitute Parts

Part Overview

The SMP4-SBC-YG is a dual-color surface mount LED indicator manufactured by Bivar Inc., featuring independent green and yellow light emission in a 4-PLCC package. This component provides visual indication across two distinct wavelengths: 574nm for green and 591nm for yellow operation.

The SMP4-SBC-YG is classified as obsolete. Locating substitute components with identical electrical and mechanical specifications is necessary to support ongoing production requirements, maintenance operations, and design continuity for systems currently utilizing this part.

Key Parameters

Parameter	Specification
Manufacturer Part Number	SMP4-SBC-YG
Manufacturer	Bivar Inc.
Color Configuration	Green, Yellow (Independent)
Wavelength - Dominant	574nm Green, 591nm Yellow
Voltage - Forward (Vf) Typical	1.9V Green, 1.9V Yellow
Current - Test	20mA Green, 20mA Yellow
Millicandela Rating	115mcd Green, 180mcd Yellow
Viewing Angle	120°
Lens Size	2.40mm Diameter
Lens Style	Round with Flat Top
Lens Color	Colorless
Package / Case	4-PLCC
Mounting Type	Surface Mount
Size / Dimension	3.20mm L x 2.80mm W
Height (Max)	1.95mm
Moisture Sensitivity Level (MSL)	4 (72 Hours)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the SMP4-SBC-YG is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Forward voltage (Vf): 1.9V for both green and yellow channels
Test current: 20mA for both channels
Wavelength - Dominant: 574nm green and 591nm yellow
Millicandela rating: 115mcd green and 180mcd yellow

Mechanical Parameters:

Package type: 4-PLCC
Lens size: 2.40mm diameter
Lens style: Round with flat top
Lens color: Colorless (clear)
Viewing angle: 120°
Overall dimensions: 3.20mm L x 2.80mm W
Mounting type: Surface mount

Environmental Parameters:

Moisture Sensitivity Level: 4 (72 Hours)

The SMTL4-SBC-YG meets all specified electrical and mechanical parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Parameter	SMP4-SBC-YG (Main Part)	SMTL4-SBC-YG (Substitute)	Match Status
Manufacturer	Bivar Inc.	Bivar Inc.	Identical
Color Configuration	Green, Yellow (Independent)	Green, Yellow (Independent)	Identical
Wavelength - Dominant	574nm Green, 591nm Yellow	574nm Green, 591nm Yellow	Identical
Voltage - Forward (Vf) Typical	1.9V Green, 1.9V Yellow	1.9V Green, 1.9V Yellow	Identical
Current - Test	20mA Green, 20mA Yellow	20mA Green, 20mA Yellow	Identical
Millicandela Rating	115mcd Green, 180mcd Yellow	115mcd Green, 180mcd Yellow	Identical
Viewing Angle	120°	120°	Identical
Lens Size	2.40mm Diameter	2.40mm Diameter	Identical
Lens Style	Round with Flat Top	Round with Flat Top	Identical
Lens Color	Colorless	Colorless	Identical
Package / Case	4-PLCC	4-PLCC	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Size / Dimension	3.20mm L x 2.80mm W	3.20mm L x 2.80mm W	Identical
Height (Max)	1.95mm	2.05mm	Compatible (within tolerance)
Moisture Sensitivity Level (MSL)	4 (72 Hours)	4 (72 Hours)	Identical
Product Status	Obsolete	Active	Substitute is active
Packaging	Bulk	Tape & Reel (TR)	Different format

Engineering Selection Recommendations

The SMTL4-SBC-YG is the direct parametric equivalent for the obsolete SMP4-SBC-YG. All critical electrical specifications, optical characteristics, and mechanical dimensions are identical. The maximum height difference of 0.10mm (1.95mm versus 2.05mm) remains within standard PCB assembly tolerances for surface mount components.

The SMTL4-SBC-YG carries active product status, ensuring ongoing availability and supply chain continuity. This part is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

The primary distinction between the two parts is packaging format: the SMP4-SBC-YG was supplied in bulk packaging, while the SMTL4-SBC-YG is supplied in Tape & Reel (TR) format. This packaging difference does not affect component functionality or performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the SMTL4-SBC-YG be used as a direct replacement for the SMP4-SBC-YG in existing designs?

A: Yes. The SMTL4-SBC-YG meets all electrical and mechanical specifications of the SMP4-SBC-YG. Both components feature identical forward voltage, test current, wavelength, luminous intensity, viewing angle, lens geometry, and package footprint. The 0.10mm height difference is within standard PCB assembly tolerances.

Q: What is the significance of the different packaging formats?

A: The SMP4-SBC-YG was supplied in bulk packaging, while the SMTL4-SBC-YG is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated surface mount assembly processes. This difference affects handling and assembly procedures but does not impact component performance or electrical characteristics.

Q: Why is the SMP4-SBC-YG classified as obsolete?

A: The SMP4-SBC-YG has been discontinued by the manufacturer. The SMTL4-SBC-YG represents the active equivalent product line, offering identical functionality with current manufacturing support and regulatory compliance.

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

A: The SMTL4-SBC-YG is ROHS3 compliant and REACH unaffected. Both parts share identical MSL (Moisture Sensitivity Level) ratings of 4 (72 Hours) and ECCN/HTSUS classifications.

Q: What is the current inventory status for the SMTL4-SBC-YG?

A: The SMTL4-SBC-YG has significantly higher inventory availability (53,992 pieces) compared to the obsolete SMP4-SBC-YG (1,029 pieces), supporting reliable supply for ongoing production requirements.

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