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202A121-3/42-0 Heat shrink boot for shell size 21, made of semi-rigid polyolefin with adhesive coating and flame retardant properties. Supplied diameter 24.61mm, recovers to 9.91mm (large end) and 5.31mm (small end).
Mfr Part #:

202A121-3/42-0

Available from 1 distributors
Mfr Name: TE Connectivity
TE Connectivity
Heat shrink boot for shell size 21, made of semi-rigid polyolefin with adhesive coating and flame retardant properties. Supplied diameter 24.61mm, recovers to 9.91mm (large end) and 5.31mm (small end).
Total Stock: 45 pcs

202A121-3/42-0 Available from 1 distributors

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Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
45 pcs
45 pcs On Request 1 On Request On Request On Request On Request On Request

202A121-3/42-0 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Color
Features
Large Diameter Recovered
Large Diameter Supplied
Large Recovered Length
Material
Military Grade
Shell Size
Small Diameter Recovered
Small Diameter Supplied
Total Length Recovered
Type

202A121-3/42-0 Description

Short technical summary and product information.

This heat shrink boot from TE Connectivity is designed for shell size 21 applications. It is constructed from semi-rigid polyolefin material in black, featuring an adhesive coating that provides a reliable environmental seal and flame retardant properties for enhanced safety.

 

The boot has a supplied inner diameter of 24.61mm on both ends. After heat application, the large end recovers to 9.91mm and the small end to 5.31mm. The total recovered length is 38.10mm, with the large section recovering to 21.79mm. These dimensions make it suitable for sealing and strain relief on cables and connectors.

 

Typical applications include military, aerospace, and industrial environments where protection against moisture, dust, and mechanical stress is required. The adhesive coating ensures a tight bond to cable jackets and connector backshells.

202A121-3/42-0 Quick Information

Product Type: Heat Shrink Boot
Canonical Name: Heat Shrink Boot, Shell Size 21, Polyolefin, Black, Adhesive Coating, Flame Retardant
Subcategory: Boots

202A121-3/42-0 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

202A121-3/42-0 Features

  • Semi-rigid polyolefin material for durability.
  • Adhesive coating provides environmental seal.
  • Flame retardant for safety compliance.
  • Shell size 21 for specific connector sizes.
  • Recovers to precise diameters for tight fit.

202A121-3/42-0 Applications

  • Used for cable entry sealing in connectors.
  • Provides strain relief for wire harnesses.
  • Suitable for military and aerospace applications.
  • Ideal for harsh environment protection.

202A121-3/42-0 FAQs

7 frequently asked questions generated from this part’s specifications.
What material is the heat shrink boot made of?

It is made of semi-rigid polyolefin (PO).

What is the shell size of this boot?

The shell size is 21.

What are the supplied and recovered diameters?

Supplied inner diameter is 24.61mm on both ends. After recovery, the large end is 9.91mm and the small end is 5.31mm.

Does this boot have an adhesive coating?

Yes, it features an adhesive coating.

Is the boot flame retardant?

Yes, it is flame retardant.

What is the total length after recovery?

The total recovered length is 38.10mm.

Is this product RoHS compliant?

It is listed as RoHS3 Compliant, but this data is unverified and low confidence.

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