Equivalent & Substitute Parts for Bivar Inc. 3HDL Red Diffused T-1 LED

Part Overview

The Bivar Inc. 3HDL is a red diffused T-1 through-hole LED designed for discrete indication applications. This component features a 2V forward voltage, 2.5mcd brightness rating, and 40° viewing angle in a standard 3mm radial package. The product is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer Part Number	3HDL
Manufacturer	Bivar Inc.
Color	Red
Lens Transparency	Diffused
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	2V
Current - Test	2mA
Millicandela Rating	2.5mcd
Viewing Angle	40°
Mounting Type	Through Hole
Wavelength - Peak	625nm
Package / Case	Radial
Height (Max)	4.50mm
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 3HDL is determined by the following critical parameters:

Primary Matching Criteria:

Color: Red
Lens Transparency: Diffused
Lens Size: 3mm, T-1
Mounting Type: Through Hole
Package / Case: Radial
Wavelength - Peak: 625nm nominal range (620-635nm acceptable)

Secondary Compatibility Parameters:

Voltage - Forward (Vf): 2V nominal (1.7V to 2.2V acceptable for most applications)
Current - Test: 2mA nominal (10-20mA acceptable with circuit design adjustment)
Millicandela Rating: 2.5mcd nominal (1.8mcd to 400mcd depending on application requirements)
Viewing Angle: 40° nominal (30° to 60° acceptable for general indication)
Height (Max): 4.50mm nominal (up to 6.35mm acceptable for most PCB layouts)

Substitute parts are grouped into two categories: Parametric Equivalents (direct replacements with identical electrical characteristics) and Similar Parts (compatible alternatives with acceptable parameter variations for standard indication applications).

Parameter Comparison

Part Number	Manufacturer	Color	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Wavelength - Peak	Height (Max)	Product Status	Packaging
3HDL	Bivar Inc.	Red	2V	2mA	2.5mcd	40°	625nm	4.50mm	Obsolete	Radial
3HDL-S	Bivar Inc.	Red	2V	2mA	2.5mcd	40°	625nm	4.50mm	Active	Bulk
1254-10SURD/S530-A3	Everlight Electronics Co Ltd	Red	2V	20mA	400mcd	30°	632nm	5.30mm	Active	Tape & Reel (TR)
151031SS06000	Würth Elektronik	Red	2.2V	20mA	35mcd	60°	650nm	5.55mm	Active	Bulk
4300F1LC	Visual Communications Company - VCC	Red	1.8V	2mA	1.8mcd	50°	635nm	6.35mm	Not For New Designs	Bulk
HLMP-1301-G00FG	Broadcom Limited	Red	1.9V	10mA	8.6mcd	60°	635nm	6.35mm	Active	Bulk
HLMP-1600	Broadcom Limited	Red	5V	10mA	2.1mcd	60°	635nm	6.35mm	Active	Bulk
HLMP-1600-D00A1	Broadcom Limited	Red	5V	10mA	2.1mcd	60°	635nm	N/A	Active	Bulk
HLMP-1600-D00A2	Broadcom Limited	Red	5V	10mA	2.1mcd	60°	635nm	N/A	Active	Bulk
HLMP-1601	Broadcom Limited	Red	12V	13mA	2.1mcd	60°	635nm	6.35mm	Active	Bulk
HLMP-1700	Broadcom Limited	Red	1.7V	2mA	2.1mcd	50°	635nm	6.35mm	Active	Bulk

Engineering Selection Recommendations

Recommended Primary Substitute: 3HDL-S (Bivar Inc.)

The 3HDL-S is the direct parametric equivalent to the obsolete 3HDL. This component maintains identical electrical specifications (2V forward voltage, 2mA test current, 2.5mcd brightness) and mechanical configuration (3mm T-1 radial package, 4.50mm maximum height). The 3HDL-S is classified as Active and is ROHS3 compliant, making it the preferred choice for direct replacement in existing designs. The only difference is packaging format (Bulk versus original specification), which does not affect electrical or mechanical compatibility.

Recommended Secondary Substitute: HLMP-1700 (Broadcom Limited)

The HLMP-1700 provides compatible substitution for applications where the 3HDL-S is unavailable. This component shares the same 3mm T-1 radial package and diffused red lens configuration. Electrical parameters are closely matched: 1.7V forward voltage (versus 2V), 2mA test current (identical), and 2.1mcd brightness (versus 2.5mcd). The HLMP-1700 is Active, ROHS3 compliant, and has extensive inventory availability (530,300 units). The slightly lower forward voltage and brightness rating are acceptable for standard indication applications. Maximum height is 6.35mm, which may require PCB layout verification in space-constrained designs.

Alternative Substitute: HLMP-1301-G00FG (Broadcom Limited)

The HLMP-1301-G00FG maintains the 3mm T-1 radial package and diffused red lens. Forward voltage is 1.9V (close to 2V specification), with 10mA test current and 8.6mcd brightness. This component is Active and ROHS3 compliant. The higher test current and brightness rating require circuit design adjustment but provide enhanced visibility for applications requiring greater luminous intensity. Maximum height is 6.35mm.

Conditional Substitute: 151031SS06000 (Würth Elektronik)

The 151031SS06000 from Würth Elektronik (WL-TMRC series) is compatible for applications where viewing angle expansion is beneficial. This component features 2.2V forward voltage, 20mA test current, and 35mcd brightness with a 60° viewing angle (versus 40° for the 3HDL). The component is Active, ROHS3 compliant, and REACH unaffected. Circuit design modification is required to accommodate the higher test current. Maximum height is 5.55mm.

Not Recommended for New Designs: 4300F1LC (Visual Communications Company - VCC)

The 4300F1LC is classified as "Not For New Designs" and should not be selected for new applications, despite parameter compatibility. This component has 1.8V forward voltage, 1.8mcd brightness, and 50° viewing angle. Use only for legacy system maintenance where no other options exist.

Voltage-Specific Alternatives:

HLMP-1600 series (5V operation): For applications requiring 5V supply voltage, the HLMP-1600, HLMP-1600-D00A1, and HLMP-1600-D00A2 provide compatible 3mm T-1 red diffused LEDs with 2.1mcd brightness and 60° viewing angle. These are Active and ROHS3 compliant.
HLMP-1601 (12V operation): For 12V supply voltage applications, the HLMP-1601 provides a compatible 3mm T-1 red diffused LED with 2.1mcd brightness and 60° viewing angle. This component is Active and ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can the 3HDL-S be used as a direct replacement for the 3HDL without circuit modification?

A: Yes. The 3HDL-S is a parametric equivalent with identical electrical specifications (2V forward voltage, 2mA test current, 2.5mcd brightness) and mechanical configuration (3mm T-1 radial package). No circuit modification is required. The only difference is packaging format (Bulk).

Q: What is the key difference between the 3HDL and HLMP-1700?

A: Both components share the same 3mm T-1 radial package and diffused red lens. The HLMP-1700 has slightly lower forward voltage (1.7V versus 2V) and brightness (2.1mcd versus 2.5mcd). These differences are acceptable for standard indication applications. The HLMP-1700 is Active with extensive inventory availability.

Q: Can I use the HLMP-1600 series as a substitute for the 3HDL?

A: The HLMP-1600 series is compatible mechanically (3mm T-1 radial package) but requires circuit design modification. The HLMP-1600 operates at 5V forward voltage (versus 2V for the 3HDL) and requires 10mA test current (versus 2mA). Circuit redesign is necessary to accommodate the higher voltage and current requirements.

Q: What is the viewing angle difference between the 3HDL and HLMP-1700?

A: The 3HDL has a 40° viewing angle, while the HLMP-1700 has a 50° viewing angle. The HLMP-1700 provides a wider viewing angle, which may be beneficial for applications where visibility from multiple angles is required.

Q: Is the 151031SS06000 from Würth Elektronik a suitable substitute?

A: The 151031SS06000 is mechanically compatible (3mm radial package, diffused red lens) but has different electrical specifications. It operates at 2.2V forward voltage with 20mA test current and provides 35mcd brightness with a 60° viewing angle. Circuit design modification is required to accommodate the higher test current. This component is suitable for applications requiring enhanced brightness and wider viewing angle.

Q: What is the maximum height difference between the 3HDL and its substitutes?

A: The 3HDL has a maximum height of 4.50mm. Most substitutes (HLMP-1700, HLMP-1301-G00FG, HLMP-1600 series, HLMP-1601) have a maximum height of 6.35mm. The 151031SS06000 has a maximum height of 5.55mm. Height differences may require PCB layout verification in space-constrained designs.

Q: Are all recommended substitutes RoHS3 compliant?

A: Yes. The 3HDL-S, HLMP-1700, HLMP-1301-G00FG, 151031SS06000, HLMP-1600 series, and HLMP-1601 are all ROHS3 compliant. The 4300F1LC is also ROHS3 compliant but is not recommended for new designs.

Q: What packaging formats are available for the substitute parts?

A: The 3HDL-S is available in Bulk packaging. The Everlight 1254-10SURD/S530-A3 is available in Tape & Reel (TR) format. All Broadcom and Würth Elektronik substitutes are available in Bulk packaging. Packaging format selection depends on production volume and assembly process requirements.

Q: Can the HLMP-1301-G00FG be used in applications requiring the exact 2mA test current of the 3HDL?

A: The HLMP-1301-G00FG has a 10mA test current (versus 2mA for the 3HDL). Circuit design modification is required to limit current to the desired level. The component's 8.6mcd brightness (versus 2.5mcd for the 3HDL) provides enhanced visibility, which may be beneficial for many applications.

Q: What is the wavelength difference between the 3HDL and HLMP-1700?

A: The 3HDL has a peak wavelength of 625nm. The HLMP-1700 has a peak wavelength of 635nm. Both are within the red spectrum and are visually indistinguishable for standard indication applications.

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