Bivar Inc. 3SRC Equivalent & Substitute Parts

Part Overview

The Bivar Inc. 3SRC is a red LED indicator with a clear T-1 lens for discrete 1.7V radial through-hole applications. This part features 60mcd luminous intensity and is classified as Obsolete with 1047 units in stock. Finding equivalent and substitute parts is necessary due to its obsolete status, which may limit long-term availability for new designs or production runs requiring continuous supply.

Key Parameters

Parameter	Value
Manufacturer Part Number	3SRC
Manufacturer	Bivar Inc.
Description	LED RED CLEAR T-1 T/H
Color	Red
Lens Transparency	Clear
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	1.7V
Current - Test	20mA
Millicandela Rating	60mcd
Viewing Angle	30°
Wavelength - Peak	645nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	4.50mm
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 3SRC is determined by the following allowable parameters:

Primary Equivalence Criteria:

Red LED color (maintained across all substitutes)
Through-hole radial mounting configuration (maintained across all substitutes)
3mm T-1 lens form factor (primary substitute grouping)
Forward voltage tolerance: 1.7V to 2.0V nominal
Test current: 20mA nominal operation
Clear lens transparency (primary group) or diffused lens (secondary group)

Secondary Equivalence Criteria:

Luminous intensity (60mcd baseline; acceptable range: 3mcd to 680mcd depending on application requirements)
Viewing angle (30° baseline; acceptable range: 20° to 45°)
Wavelength compatibility (peak wavelength: 640nm to 652nm for close spectral match)

Substitutes are grouped into two categories:

Group 1: Parametric Equivalents (Direct Replacements) Parts that maintain the same lens material, transparency, and form factor with compatible electrical parameters.

Group 2: Similar Substitutes (Modified Electrical Parameters) Parts that maintain the same mechanical envelope but with different luminous intensity, forward voltage, or wavelength specifications. These require circuit design review when higher brightness or different forward voltage characteristics are present.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Lens Size	Vf (Typ)	Current - Test	Millicandela	Viewing Angle	Wavelength - Peak	Height (Max)	Product Status	Packaging
3SRC	Bivar Inc.	Red	Clear	3mm, T-1	1.7V	20mA	60mcd	30°	645nm	4.50mm	Obsolete	-
3SRC-S	Bivar Inc.	Red	Clear	3mm, T-1	1.7V	20mA	60mcd	30°	645nm	4.50mm	Active	Bulk
1224-10SURC/S530-A3	Everlight Electronics Co Ltd	Red	Clear	3.00mm Dia	2V	20mA	400mcd	20°	632nm	5.50mm	Active	Tape & Reel (TR)
151031SS04000	Würth Elektronik	Red	Diffused	3.00mm Dia	2V	20mA	160mcd	40°	640nm	5.55mm	Active	Bulk
HLMP-K105	Broadcom Limited	Red	Clear	3mm, T-1	1.8V	20mA	65mcd	45°	645nm	6.35mm	Active	Bulk
HLMP-K105-J0002	Broadcom Limited	Red	Clear	3mm, T-1	1.8V	20mA	65mcd	45°	645nm	6.35mm	Active	Cut Tape (CT)
HLMP-K155	Broadcom Limited	Red	Clear	3mm, T-1	1.7V	1mA	3mcd	45°	660nm	6.35mm	Active	Bulk
HLMP-K155-D0002	Broadcom Limited	Red	Clear	3mm, T-1	1.7V	1mA	3mcd	45°	660nm	6.35mm	Active	Tape & Reel (TR)
HLMP-Y601-J0000	Broadcom Limited	Red	Clear	3mm, T-1	2V	20mA	680mcd	45°	633nm	5.20mm	Active	Bulk
HLMP-Y651-G0000	Broadcom Limited	Red	Clear	3mm, T-1	2V	20mA	300mcd	45°	652nm	5.20mm	Active	Bulk
HLMP-Y951-K0000	Broadcom Limited	Red	Clear	3mm, T-1	2V	20mA	680mcd	45°	622nm	5.20mm	Active	Bulk

Engineering Selection Recommendations

Primary Substitute: Bivar Inc. 3SRC-S

The 3SRC-S is the recommended direct replacement for the obsolete 3SRC. It is manufactured by the same supplier, maintains identical electrical and optical specifications, and is currently in Active product status with 1532 units in stock. The only difference is packaging format (Bulk instead of unspecified). This part requires no circuit design modifications.

Secondary Substitutes: Broadcom HLMP-K105 Series

The HLMP-K105 and HLMP-K105-J0002 (Cut Tape packaging) represent the closest electrical match from an alternative manufacturer. Both are Active products with forward voltage of 1.8V (0.1V higher than the 3SRC), 20mA test current, and comparable 65mcd luminous intensity. The peak wavelength of 645nm is identical to the 3SRC. Height is 6.35mm compared to 4.50mm. These parts are RoHS3 Compliant and REACH Unaffected.

Brightness-Enhanced Alternatives: Broadcom HLMP-Y Series

The HLMP-Y601-J0000 (680mcd) and HLMP-Y651-G0000 (300mcd) offer significantly higher brightness while maintaining the T-1 clear lens form factor and 20mA operation. Forward voltage is 2V. These parts are suitable for applications where increased visibility is required without circuit redesign. Both are RoHS3 Compliant and REACH Unaffected. The HLMP-Y601-J0000 offers the highest brightness option at 680mcd.

Low-Current Alternative: Broadcom HLMP-K155 Series

The HLMP-K155 and HLMP-K155-D0002 (Tape & Reel packaging) operate at 1mA test current with 3mcd output, making them suitable for low-power indicator applications. Forward voltage matches the 3SRC at 1.7V. These parts are RoHS3 Compliant and provide higher inventory availability (100,300 units in stock for the bulk variant).

Diffused Lens Option: Würth Elektronik 151031SS04000

The 151031SS04000 is suitable where a diffused red lens is acceptable. It maintains 20mA operation with 2V forward voltage and offers a wider 40° viewing angle. The diffused lens provides uniform brightness when viewed from various angles. It is RoHS3 Compliant and REACH Unaffected.

Higher Brightness with Tape & Reel: Everlight 1224-10SURC/S530-A3

The Everlight part provides 400mcd brightness at 20mA operation with 2V forward voltage in Tape & Reel packaging. Height is 5.50mm. This part is suitable for applications prioritizing automated assembly and higher brightness output.

Frequently Asked Questions (FAQ)

Q: Can I use the 3SRC-S as a direct replacement for the 3SRC?

A: Yes. The 3SRC-S is a parametric equivalent with identical electrical and optical specifications. It is currently in Active product status with sufficient inventory. The only difference is packaging format.

Q: What is the voltage tolerance for substitution?

A: The 3SRC operates at 1.7V nominal forward voltage. Substitutes with 1.7V to 2.0V are compatible. However, circuits designed with specific current-limiting resistor values for 1.7V will operate at slightly different brightness levels with 2V parts. Recalculate resistor values if precise brightness matching is required.

Q: Can I substitute the HLMP-K155 for the 3SRC?

A: The HLMP-K155 shares the same T-1 form factor and 1.7V forward voltage but operates at 1mA test current with only 3mcd output compared to the 3SRC's 20mA/60mcd. It is suitable only for low-power indicator applications and will produce significantly less brightness.

Q: Why do some substitutes have different heights?

A: The 3SRC has a height of 4.50mm. Some substitutes are 5.20mm to 6.35mm tall. Verify mechanical clearance in your PCB assembly if height is critical. The Broadcom HLMP-Y series at 5.20mm offers a good compromise between height and brightness.

Q: Are all substitute parts RoHS3 Compliant?

A: The 3SRC-S does not specify RoHS status in the provided data. The Broadcom HLMP-K105, HLMP-K155, HLMP-Y601-J0000, HLMP-Y651-G0000, and HLMP-Y951-K0000 are all RoHS3 Compliant. The Würth Elektronik 151031SS04000 is RoHS3 Compliant and REACH Unaffected. Verify compliance requirements with your specific application.

Q: What is the difference between bulk and tape & reel packaging?

A: Bulk packaging is suitable for manual assembly or small-volume hand-placement operations. Tape & Reel packaging is designed for automated component pick-and-place equipment. Select packaging based on your assembly process. Both contain the same electrical component.

Q: Which substitute offers the brightest output?

A: The HLMP-Y601-J0000 and HLMP-Y951-K0000 both provide 680mcd at 20mA, compared to the 3SRC's 60mcd. The HLMP-Y601-J0000 has a peak wavelength of 633nm (closer to red), while the HLMP-Y951-K0000 is 622nm (deeper red).

Q: Can I use the 151031SS04000 with its diffused lens instead of a clear lens?

A: Yes, if your application requires diffused rather than clear lens optics. The diffused lens provides a wider viewing angle (40° versus 30° for the 3SRC) and more uniform brightness distribution. This is suitable for indicator applications where edge-on viewing is not critical.

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