LT450A Gas Discharge Tube Equivalent & Substitute Parts

Part Overview

The LT450A is a 2-pole gas discharge tube (GDT) rated for 450V DC spark-over voltage, designed for through-hole mounting in axial cylinder package configuration. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and component procurement.

Gas discharge tubes function as surge protection devices, conducting high-energy transients to ground while remaining non-conductive under normal operating conditions. The obsolete status of the LT450A necessitates evaluation of active alternative components that maintain functional equivalence within the specified electrical and mechanical parameters.

Substiute Parts

LT450A

Littelfuse Inc.In Stock: 35424LT450A Datasheet

Current PartRFQ

B88069X2010S102

EPCOS - TDK ElectronicsIn Stock: 1997B88069X2010S102 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LT450A is determined by the following critical parameters:

• Voltage - DC Spark Over (Nominal): The substitute must operate within the voltage class of the original design. The B88069X2010S102 operates at 470V, which represents a 4.4% increase from the 450V specification. This voltage differential is within acceptable tolerance for GDT applications where the spark-over voltage establishes the protection threshold.

• Number of Poles: Both the main part and substitute maintain 2-pole configuration, ensuring circuit topology compatibility.

• Mounting Type and Package: Both components utilize through-hole mounting with axial cylinder packaging, providing mechanical and footprint compatibility on printed circuit boards.

• Fail Short Characteristic: Both parts maintain the "No" fail-short specification, ensuring the device does not create a permanent short circuit upon failure.

• RoHS Compliance: Both components meet ROHS3 compliance requirements, satisfying environmental and regulatory standards.

The B88069X2010S102 is the manufacturer-recommended substitute, offering active product status and additional impulse discharge current specification (5000A at 8/20µs) not provided for the original LT450A.

Parameter Comparison

Engineering Selection Recommendations

The B88069X2010S102 is the designated substitute for the obsolete LT450A based on the following criteria:

• Product Status: The B88069X2010S102 maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete LT450A.

• Regulatory Compliance: Both components satisfy ROHS3 compliance requirements. The B88069X2010S102 additionally carries REACH Unaffected status, providing expanded regulatory coverage.

• Electrical Compatibility: The 470V spark-over rating of the B88069X2010S102 operates within the voltage class of the original 450V specification. Both components maintain identical 2-pole configuration and non-fail-short characteristics.

• Mechanical Compatibility: Identical through-hole mounting and axial cylinder packaging ensure direct footprint compatibility without circuit board redesign.

• Certifications: Both components carry identical ECCN (EAR99) and HTSUS (8536.30.8000) classifications, maintaining export and tariff compliance.

Frequently Asked Questions (FAQ)

Q: Can the B88069X2010S102 be used as a direct replacement for the LT450A?

A: Yes. Both components share identical 2-pole configuration, through-hole mounting, axial cylinder packaging, and non-fail-short characteristics. The 470V spark-over rating of the substitute operates within the voltage class of the original 450V specification.

Q: What is the voltage difference between the LT450A and B88069X2010S102?

A: The B88069X2010S102 operates at 470V nominal spark-over voltage compared to the LT450A at 450V, representing a 4.4% increase. This differential is within acceptable tolerance for gas discharge tube applications where spark-over voltage establishes the protection threshold.

Q: Are there packaging differences between these components?

A: No. Both the LT450A and B88069X2010S102 utilize through-hole mounting with axial cylinder packaging, providing identical footprint compatibility on printed circuit boards.

Q: Does the B88069X2010S102 meet the same regulatory requirements as the LT450A?

A: Yes. Both components are ROHS3 compliant and carry identical ECCN and HTSUS classifications. The B88069X2010S102 additionally carries REACH Unaffected status.

Q: Why is the LT450A listed as obsolete?

A: The LT450A has been discontinued by the manufacturer. The B88069X2010S102 is the active alternative that maintains functional and mechanical equivalence for ongoing design support and procurement.

Q: What is the impulse discharge current specification for the LT450A?

A: The impulse discharge current (8/20µs) is not specified in the available documentation for the LT450A. The B88069X2010S102 specifies 5000A (5kA) impulse discharge current at 8/20µs.