NTM-550 Equivalent & Substitute Parts

Part Overview

The NTM-550 is a T1/T1 3/4 LED standoff manufactured by Bivar Inc., constructed from black nylon with a length of 0.550" (13.97mm). This component is designed to provide mechanical support and alignment for LED assemblies in vertical mounting configurations. The part maintains Active product status and is ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity tolerance.

Substitute parts are identified when equivalent functional performance can be achieved through alternative manufacturers while maintaining compatibility with the same LED form factors (T1, T1 3/4), material composition (nylon), color (black), and regulatory compliance standards.

Key Parameters

Parameter	Value	Criticality for Substitution
LED Form Factor	T1, T1 3/4	Critical
Material	Nylon	Critical
Color	Black	Critical
Length	0.550" (13.97mm)	Application-Dependent
Packaging	Bag	Non-Critical
RoHS Status	ROHS3 Compliant	Regulatory
ECCN	EAR99	Regulatory

Substitute Part Grouping Explanation

Substitute parts for the NTM-550 are qualified based on the following criteria:

Critical Matching Parameters:

LED Form Factor: All substitutes support T1 and T1 3/4 LED types
Material: All substitutes are constructed from nylon
Color: All substitutes are black
Regulatory Compliance: All substitutes maintain ROHS3 compliance and EAR99 ECCN classification

Length Variation Tolerance: Substitute parts are grouped by length deviation from the primary specification. The NTM-550 specifies 0.550" (13.97mm). Substitute parts are available in three length variants: 0.531" (13.50mm), 0.551" (14.00mm), and 0.571" (14.50mm). Length selection depends on specific application requirements and available mounting clearance.

Manufacturer Diversity: All identified substitutes are manufactured by Würth Elektronik, providing alternative sourcing while maintaining identical functional and compliance characteristics.

Parameter Comparison

Manufacturer Part Number	Manufacturer	LED Form Factor	Material	Color	Length	Length (mm)	RoHS Status	Product Status	Inventory (Pcs)
NTM-550	Bivar Inc.	T1, T1 3/4	Nylon	Black	0.550"	13.97	ROHS3 Compliant	Active	674
705820135	Würth Elektronik	T1, T1 3/4	Nylon	Black	0.531"	13.50	ROHS3 Compliant	Active	982
705820140	Würth Elektronik	T1, T1 3/4	Nylon	Black	0.551"	14.00	ROHS3 Compliant	Active	2530
705820145	Würth Elektronik	T1, T1 3/4	Nylon	Black	0.571"	14.50	ROHS3 Compliant	Active	2407

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, qualifying them for direct substitution in applications where the NTM-550 is specified.

705820140 (0.551" / 14.00mm): This substitute provides the closest dimensional match to the primary specification, with a length variance of +0.001" (+0.03mm). This part is recommended for applications with minimal clearance tolerance requirements and represents the highest inventory availability at 2530 pieces.

705820135 (0.531" / 13.50mm): This substitute provides a shorter profile with a length variance of -0.019" (-0.47mm). Selection of this part is appropriate for applications requiring reduced standoff height or where mounting clearance is constrained.

705820145 (0.571" / 14.50mm): This substitute provides an extended profile with a length variance of +0.021" (+0.53mm). Selection of this part is appropriate for applications requiring increased standoff height or where additional component clearance is necessary.

All substitutes are manufactured by Würth Elektronik and carry identical regulatory classifications (ECCN EAR99, HTSUS 3926.90.9985) to the primary part.

Frequently Asked Questions (FAQ)

Q: Can 705820135, 705820140, and 705820145 be used interchangeably with NTM-550?

A: These parts are functionally equivalent for LED form factor support (T1, T1 3/4), material composition (nylon), color (black), and regulatory compliance (ROHS3). Selection between these parts depends on the specific length requirement of the application. The NTM-550 specifies 0.550" length; substitute parts are available in 0.531", 0.551", and 0.571" lengths. Verify that the selected substitute length accommodates the available mounting clearance in your application.

Q: What is the significance of the length variations among substitute parts?

A: Length variations directly affect the vertical standoff distance between the mounting surface and the LED component. The NTM-550 provides 0.550" standoff height. Würth Elektronik substitutes are available in three length options: shorter (0.531"), nearly equivalent (0.551"), and longer (0.571"). Application-specific requirements determine which length variant is appropriate.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts (705820135, 705820140, 705820145) maintain ROHS3 compliance, matching the regulatory status of the NTM-550.

Q: What packaging format is used for substitute parts?

A: All substitute parts are supplied in Bag packaging, consistent with the primary NTM-550 specification.

Q: Are there inventory considerations when selecting a substitute?

A: Current inventory levels vary among substitute parts. 705820140 maintains the highest inventory at 2530 pieces, followed by 705820145 at 2407 pieces, and 705820135 at 982 pieces. The primary NTM-550 has 674 pieces in stock. Inventory availability may influence part selection in time-sensitive applications.

Q: Do substitute parts carry the same ECCN and HTSUS classifications?

A: Yes. All substitute parts are classified under ECCN EAR99 and HTSUS 3926.90.9985, identical to the NTM-550 classification.

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