Equivalent & Substitute Parts for 3HD-201

Part Overview

The Bivar Inc. 3HD-201 is a red diffused T-1 through-hole LED designed for discrete indication applications. This part operates at 2V forward voltage with a 30mcd brightness rating and 35° viewing angle. The 3HD-201 is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain compatibility with the original electrical specifications, mechanical form factor, and mounting requirements while offering active product status and current availability.

Key Parameters

Parameter	Value	Criticality for Substitution
Color	Red	Critical
Lens Size	3mm, T-1	Critical
Lens Transparency	Diffused	Critical
Mounting Type	Through Hole	Critical
Package / Case	Radial	Critical
Voltage - Forward (Vf) (Typ)	2V	High
Current - Test	20mA	High
Millicandela Rating	30mcd	High
Viewing Angle	35°	Medium
Wavelength - Peak	625nm	Medium
Height (Max)	5.10mm	Medium
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Low

Substitute Part Grouping Explanation

Substitute parts for the 3HD-201 are grouped based on electrical and mechanical compatibility. The primary substitution criteria are:

Critical Parameters (Must Match):

Color: Red
Lens Size: 3mm, T-1
Lens Transparency: Diffused
Mounting Type: Through Hole
Package / Case: Radial

High-Priority Parameters (Should Match or Be Compatible):

Voltage - Forward (Vf): 2V nominal (acceptable range: 1.7V to 2.2V for circuit compatibility)
Current - Test: 20mA nominal (acceptable range: 10mA to 20mA)
Millicandela Rating: 30mcd nominal (acceptable range: 25mcd to 35mcd for indication applications)

Medium-Priority Parameters (May Vary Within Limits):

Viewing Angle: 35° to 60° acceptable for general indication
Wavelength - Peak: 625nm to 650nm acceptable for red indication
Height (Max): 5.10mm to 6.35mm acceptable for through-hole mounting

Parts that deviate significantly from these parameters are classified as similar but not direct equivalents and require circuit design review before substitution.

Parameter Comparison

Parameter	3HD-201 (Main)	3HD-F	151031SS06000	4300F1LC	HLMP-1301-G00FG	HLMP-1600	HLMP-1700
Manufacturer	Bivar Inc.	Bivar Inc.	Würth Elektronik	Visual Communications Company - VCC	Broadcom Limited	Broadcom Limited	Broadcom Limited
Product Status	Obsolete	Active	Active	Not For New Designs	Active	Active	Active
Color	Red	Red	Red	Red	Red	Red	Red
Lens Size	3mm, T-1	3mm, T-1	3.00mm Dia	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Voltage - Forward (Vf) (Typ)	2V	2V	2.2V	1.8V	1.9V	5V	1.7V
Current - Test	20mA	20mA	20mA	2mA	10mA	10mA	2mA
Millicandela Rating	30mcd	30mcd	35mcd	1.8mcd	8.6mcd	2.1mcd	2.1mcd
Viewing Angle	35°	35°	60°	50°	60°	60°	50°
Wavelength - Peak	625nm	625nm	650nm	635nm	635nm	635nm	635nm
Height (Max)	5.10mm	5.30mm	5.55mm	6.35mm	6.35mm	6.35mm	6.35mm
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalent (Preferred Substitution):

The 3HD-F (Bivar Inc.) is the direct parametric equivalent to the 3HD-201. Both parts share identical electrical specifications (2V forward voltage, 20mA test current, 30mcd brightness) and mechanical form factor (3mm T-1 diffused lens, through-hole radial package). The 3HD-F is active product status with current inventory availability (1103 pcs). The only dimensional difference is a maximum height of 5.30mm versus 5.10mm for the original part, which remains within acceptable through-hole mounting tolerances. The 3HD-F is ROHS3 compliant, providing regulatory advantage over the obsolete 3HD-201.

Compatible Substitutes (Electrical Compatibility with Design Review):

The 151031SS06000 (Würth Elektronik, WL-TMRC series) is electrically compatible with acceptable parameter variance. Forward voltage is 2.2V (0.2V higher than original), test current matches at 20mA, and brightness is 35mcd (5mcd higher than original). The viewing angle increases to 60° and wavelength peak shifts to 650nm, both acceptable for red indication applications. This part is ROHS3 compliant and REACH unaffected with high inventory (10009 pcs). Circuits designed for 2V operation may require minor resistor adjustment to accommodate the 2.2V forward voltage.

Limited Compatibility (Requires Circuit Redesign):

The HLMP-1700 (Broadcom Limited) and HLMP-1700-B0002 (Broadcom Limited, Cut Tape packaging) operate at 1.7V forward voltage with significantly reduced test current (2mA versus 20mA original). Brightness is substantially lower at 2.1mcd versus 30mcd original. These parts are suitable only for applications where lower brightness is acceptable and circuit design can accommodate the reduced current draw. Both are active product status and ROHS3 compliant with extensive inventory availability.

The HLMP-1600 and HLMP-1601 (Broadcom Limited) operate at 5V and 12V respectively and are unsuitable for direct substitution in 2V circuits without complete circuit redesign.

The 4300F1LC (Visual Communications Company - VCC) is classified as "Not For New Designs" and should not be selected for new applications despite active inventory.

Compliance and Regulatory Status:

All recommended substitute parts are ROHS3 compliant. The 3HD-201 (obsolete) lacks specified RoHS status. The 3HD-F provides the most direct regulatory continuity as an active Bivar Inc. product with identical specifications and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the 3HD-F directly replace the 3HD-201 without circuit modification?

A: Yes. The 3HD-F is a parametric equivalent with identical electrical specifications (2V forward voltage, 20mA test current, 30mcd brightness) and mechanical form factor. The maximum height difference (5.30mm versus 5.10mm) is within acceptable through-hole mounting tolerances and does not require circuit redesign.

Q: What is the difference between the 3HD-201 and 151031SS06000?

A: The 151031SS06000 has a forward voltage of 2.2V (versus 2V), brightness of 35mcd (versus 30mcd), and viewing angle of 60° (versus 35°). These differences are within acceptable ranges for indication applications. Circuits designed for 2V operation may require minor resistor adjustment to accommodate the slightly higher forward voltage. The 151031SS06000 is manufactured by Würth Elektronik and is ROHS3 compliant.

Q: Why are HLMP-1600 and HLMP-1601 not recommended as direct substitutes?

A: These parts operate at 5V and 12V forward voltage respectively, compared to the 3HD-201's 2V specification. Direct substitution would require complete circuit redesign and is not recommended for applications designed around 2V LED operation.

Q: Can I use HLMP-1700 as a substitute for the 3HD-201?

A: The HLMP-1700 is electrically compatible but not a direct equivalent. It operates at 1.7V forward voltage with 2mA test current and 2.1mcd brightness, compared to the 3HD-201's 2V, 20mA, and 30mcd specifications. The HLMP-1700 is suitable only for applications where significantly lower brightness is acceptable and circuit design can accommodate reduced current draw.

Q: What packaging options are available for substitute parts?

A: The 3HD-F is available in Bulk packaging. The 151031SS06000 is available in Bulk packaging. The HLMP-1700-B0002 is available in Cut Tape (CT) packaging for automated assembly. All other substitute parts listed are available in Bulk packaging. Packaging selection depends on assembly process requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts (3HD-F, 151031SS06000, HLMP-1301-G00FG, HLMP-1600, HLMP-1601, HLMP-1700, HLMP-1700-B0002) are ROHS3 compliant. The original 3HD-201 does not specify RoHS status. The 4300F1LC is ROHS3 compliant but is classified as "Not For New Designs."

Q: What is the viewing angle difference between the 3HD-201 and substitute parts?

A: The 3HD-201 has a 35° viewing angle. The 151031SS06000, HLMP-1301-G00FG, HLMP-1600, and HLMP-1601 have 60° viewing angles. The 4300F1LC and HLMP-1700 have 50° viewing angles. Wider viewing angles are generally acceptable for indication applications and may provide improved visibility in some installations.

Q: Which substitute part has the highest brightness rating?

A: The 151031SS06000 has the highest brightness rating at 35mcd, compared to the 3HD-201's 30mcd. This 5mcd increase is within acceptable tolerance for indication applications and may provide improved visibility.

Q: Can I mix different substitute parts in the same circuit board?

A: All recommended substitute parts are mechanically compatible (3mm T-1 through-hole radial package) and can be mixed on the same circuit board. However, electrical parameters vary. Circuits should be designed to accommodate the specific forward voltage and current requirements of each part used. For consistency and simplified inventory management, using a single substitute part across all LED positions is recommended.

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