H-303C-2-120 LED Holder T1 Equivalent & Substitute Parts

Part Overview

The H-303C-2-120 is a T1 LED standoff holder manufactured by Bivar Inc., designed for right-angle mounting of 3mm LED applications with dual lead configuration. This part features black nylon construction with a 0.435" (11.05mm) length and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary to maintain design continuity and ensure ongoing component availability for production and repair applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	H-303C-2-120
Manufacturer	Bivar Inc.
LED Type	T1
LED Size	3mm
Lead Configuration	2LD (Dual Lead)
Mounting Style	Right Angle (RA)
Length	0.435" (11.05mm)
Material	Nylon
Color	Black
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
ECCN	EAR99

Substitute Part Grouping Explanation

Substitution eligibility for the H-303C-2-120 is determined by the following critical parameters:

Primary Compatibility Criteria:

LED Type: T1 (mandatory match)
LED Size: 3mm (mandatory match)
Lead Configuration: 2LD dual lead (mandatory match)
Mounting Style: Right angle (RA) (mandatory match)
Color: Black (mandatory match)
Moisture Sensitivity Level: MSL 1 (mandatory match)

Secondary Compatibility Criteria:

Length: 0.435" (11.05mm) nominal, with tolerance allowance for functional equivalence
Material: Nylon or PVC (both acceptable for mechanical and thermal properties)

Substitute parts are grouped into two categories:

Category 1 - Similar Manufacturer Part (Active Status): H-203C-1 maintains identical functional specifications with variation in length (0.380" vs. 0.435"), suitable for applications with relaxed height constraints.

Category 2 - Parametric Equivalents (Active Status): ELM 2 series parts (ELM 2-11MM through ELM 2-450) provide T1 3mm dual-lead right-angle mounting with PVC material construction and lengths ranging from 0.410" to 0.450", offering precise height matching across multiple design requirements.

Parameter Comparison

Part Number	Manufacturer	LED Type	LED Size	Lead Config	Mount Style	Length (inches)	Length (mm)	Material	Color	Product Status	MSL
H-303C-2-120	Bivar Inc.	T1	3mm	2LD	RA	0.435	11.05	Nylon	Black	Obsolete	1
H-203C-1	Bivar Inc.	T1	3mm	2LD	RA	0.380	9.65	Nylon	Black	Active	1
ELM 2-11MM	Bivar Inc.	T1	3mm	2LD	RA	0.430	10.92	PVC	Black	Active	1
ELM 2-415	Bivar Inc.	T1	3mm	2LD	RA	0.415	10.54	PVC	Black	Active	1
ELM 2-420	Bivar Inc.	T1	3mm	2LD	RA	0.420	10.67	PVC	Black	Active	1
ELM 2-425	Bivar Inc.	T1	3mm	2LD	RA	0.425	10.80	PVC	Black	Active	1
ELM 2-430	Bivar Inc.	T1	3mm	2LD	RA	0.430	10.92	PVC	Black	Active	1
ELM 2-435	Bivar Inc.	T1	3mm	2LD	RA	0.435	11.05	PVC	Black	Active	1
ELM 2-440	Bivar Inc.	T1	3mm	2LD	RA	0.440	11.18	PVC	Black	Active	1
ELM 2-445	Bivar Inc.	T1	3mm	2LD	RA	0.445	11.30	PVC	Black	Active	1
ELM 2-450	Bivar Inc.	T1	3mm	2LD	RA	0.450	11.43	PVC	Black	Active	1

Engineering Selection Recommendations

Primary Recommendation: ELM 2-435

The ELM 2-435 provides exact dimensional equivalence to the H-303C-2-120 with identical 0.435" (11.05mm) length specification. This part is manufactured by Bivar Inc., maintains active product status, and carries ROHS3 compliance certification. The material substitution from nylon to PVC does not affect functional performance for T1 3mm dual-lead right-angle LED mounting applications. This part is recommended for direct replacement in new designs and production continuity.

Secondary Recommendation: ELM 2-430

The ELM 2-430 offers 0.430" (10.92mm) length, representing a 0.005" (0.13mm) reduction from the original specification. This part is suitable for applications where minor height reduction is acceptable within PCB layout constraints. Active product status and ROHS3 compliance are maintained.

Alternative Recommendations for Height-Flexible Applications:

ELM 2-425 (0.425" / 10.80mm): For applications tolerating 0.010" (0.25mm) height reduction
ELM 2-440 (0.440" / 11.18mm): For applications tolerating 0.005" (0.13mm) height increase
ELM 2-445 (0.445" / 11.30mm): For applications tolerating 0.010" (0.25mm) height increase
ELM 2-450 (0.450" / 11.43mm): For applications tolerating 0.015" (0.38mm) height increase

Not Recommended: H-203C-1

While H-203C-1 is an active Bivar Inc. product with nylon construction matching the original material, the 0.380" (9.65mm) length represents a 0.055" (1.40mm) reduction from the H-303C-2-120 specification. This dimensional variance exceeds typical PCB layout tolerances and is suitable only for applications with explicit height reduction requirements.

Frequently Asked Questions (FAQ)

Q1: Can ELM 2 series parts (PVC material) directly replace the H-303C-2-120 (nylon material)?

A: Yes. Both nylon and PVC materials are acceptable for T1 3mm dual-lead right-angle LED standoff applications. Material substitution does not affect electrical performance, mechanical fit, or thermal characteristics for standard LED mounting. Both materials provide equivalent moisture sensitivity (MSL 1) and environmental protection.

Q2: What is the significance of the length variations in the ELM 2 series?

A: Length variations (0.415" through 0.450") accommodate different PCB design requirements and component clearance constraints. The H-303C-2-120 specification of 0.435" is matched exactly by ELM 2-435. Other lengths in the series provide flexibility for designs with different height requirements. Selection should be based on specific PCB layout and clearance specifications.

Q3: Why is the H-303C-2-120 classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Bivar Inc. and existing inventory is limited. The ELM 2 series represents the active product line replacement, offering equivalent functionality with ongoing manufacturing support and availability.

Q4: Are all substitute parts ROHS3 compliant?

A: The H-303C-2-120 does not specify ROHS status. All recommended ELM 2 series substitutes carry ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q5: What packaging formats are available for substitute parts?

A: All substitute parts are supplied in Bag packaging format, consistent with standard component distribution for LED standoff holders.

Q6: Can ELM 2-435 be used as a drop-in replacement without PCB redesign?

A: Yes. ELM 2-435 matches the H-303C-2-120 in all critical dimensions (0.435" length), LED type (T1), LED size (3mm), lead configuration (2LD), and mounting style (right angle). No PCB layout modifications are required for direct substitution.

Q7: What is the inventory status of substitute parts?

A: All recommended ELM 2 series parts maintain active inventory status with quantities ranging from 669 to 1,085 pieces in stock, ensuring reliable supply for production requirements.

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