ST-0470-BLT-STD Equivalent & Substitute Parts

Part Overview

The ST-0470-BLT-STD is a Gas Discharge Tube (GDT) rated at 470V with 2-pole through-hole configuration, manufactured by Bourns Inc. under the Sparctube™ ST-0470 series. This component is classified as obsolete, necessitating identification of active equivalent parts for continued circuit protection applications. The part maintains ROHS3 compliance and is suitable for overvoltage suppression in telecommunications and industrial equipment.

Substiute Parts

ST-0470-BLT-STD

Bourns Inc.In Stock: 1108ST-0470-BLT-STD Datasheet

Current PartRFQ

CG2470LTR

Littelfuse Inc.In Stock: 2968CG2470LTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST-0470-BLT-STD is determined by the following critical parameters:

• Voltage - DC Spark Over (Nominal): Must match 470 V ±12% tolerance band
• Number of Poles: Must be 2-pole configuration
• Mounting Type: Must be Through Hole
• Package / Case: Must be Axial Cylinder form factor
• Fail Mode: Must not fail short
• RoHS Compliance: Must maintain ROHS3 compliance status

The CG2470LTR from Littelfuse Inc. satisfies all mandatory substitution criteria. While the CG2470LTR specifies an impulse discharge current of 20kA (8/20µs), this parameter represents enhanced performance capability and does not preclude substitution. The main part's impulse discharge current specification is not provided, indicating this parameter is not a limiting factor for equivalency determination.

Parameter Comparison

Engineering Selection Recommendations

The CG2470LTR is the qualified substitute for the obsolete ST-0470-BLT-STD. Selection is supported by:

• Product Status: The CG2470LTR maintains active production status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying environmental and regulatory requirements.
• Electrical Equivalency: Matching 470V spark-over voltage and 2-pole configuration ensure functional compatibility in existing circuit designs.
• Physical Compatibility: Identical through-hole axial cylinder packaging permits direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the CG2470LTR be used as a direct replacement for the ST-0470-BLT-STD?

A: Yes. Both parts share identical spark-over voltage (470V), pole count (2), mounting type (through-hole), and package form factor (axial cylinder). The CG2470LTR is actively manufactured and maintains equivalent regulatory compliance.

Q: What is the significance of the 20kA impulse discharge current specification on the CG2470LTR?

A: The impulse discharge current rating indicates the component's surge handling capability. The CG2470LTR's 20kA specification represents the maximum transient current the device can safely discharge. This parameter is not a substitution barrier; it reflects enhanced performance characteristics of the active equivalent part.

Q: Are there packaging differences between these parts?

A: No. Both the ST-0470-BLT-STD and CG2470LTR use axial cylinder through-hole packaging, permitting direct substitution on printed circuit boards without mechanical or electrical modifications.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99, satisfying current environmental and export control requirements.

Q: What is the tolerance specification for the CG2470LTR?

A: The tolerance specification for the CG2470LTR is not provided in the available technical data. The ST-0470-BLT-STD specifies ±12% tolerance. Consult the CG2470LTR datasheet for precise tolerance information if this parameter is critical to your application.