ISO 8820-8:2019 PDF

Road vehicles — Fuse-links — Part 8: Fuse-links with bolt-in contacts (Type H and J) with rated voltage of 450 V

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Title (English):

ISO 8820-8:2019

Road vehicles — Fuse-links — Part 8: Fuse-links with bolt-in contacts (Type H and J) with rated voltage of 450 V

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 11
Publication date:: October 10, 2019
Edition:: ISO IS 8820 edition 2 version 1
ICS:: 43.040.10

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Description (English):

This document specifies fuse-links with bolt-in contacts (Type H and J) and test fixtures for the fuse-links for use in road vehicles. It establishes, for these fuse-link types, the rated current, test procedures, performance requirements and dimensions. This document is applicable to fuse-links with a rated voltage of 450 V DC, a current rating of ≤400 A and a breaking capacity of 2 000 A intended for use in road vehicles. This document is intended to be used in conjunction with ISO 8820-1 and with ISO 8820-2. The numbering of its clauses corresponds to that of ISO 8820-1 whose requirements are applicable, except where modified by requirements particular to this document.

Technical details

Technical committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
SKU: ISO 8820-8:2019

Abstract

Overview

ISO 8820-8:2019 specifies requirements for fuse-links with bolt‑in contacts (Type H and J) for road vehicles, rated 450 V DC, intended for high-voltage automotive applications (current rating ≤ 400 A, breaking capacity 2 000 A). The standard defines rated currents, dimensions, marking, test procedures, performance criteria and the required test fixture design. It is to be used together with ISO 8820-1 and ISO 8820-2.

Key topics and technical requirements

Scope & marking
- Applies to fuse-links with bolt‑in contacts (Type H, J) for 450 V DC systems.
- Fuse-links must be permanently marked with rated current, manufacturer/trademark and "450 V DC".
Mechanical & dimensional requirements
- Detailed dimensions for Type H and Type J bolt‑in fuses are specified.
- Strength of terminals and mounting torque requirements are given.
Electrical performance and tests
- Breaking capacity: tested at 2 000 A, 450 V DC.
- Voltage drop: measured across fuse tabs after rated current for 15 min; limits defined per type and rating.
- Transient current cycling: endurance tests (e.g., 50 000 cycles) to verify long‑term performance.
- Operating time‑rating: time‑to‑clear requirements at multiple test currents (see operating time tables).
- Temperature rise and resistance to temperature shock tests to ensure thermal reliability.
- Connection resistance and test fixture requirements (e.g., connection resistance ≤ 0.35 mΩ; fuses tested at least 150 mm apart).
Environmental & chemical loads
- Environmental conditioning follows ISO 8820-1; chemical exposure tests use wipe procedures (no immersion).
Test cabling
- Test cable sizes and conductor specifications refer to ISO 6722-1 (thick wall cables).

Applications and who uses this standard

Designed for electric and hybrid vehicle high-voltage distribution and battery protection systems.
Primary users:
- Automotive OEM electrical system designers and engineers
- Fuse and component manufacturers (Type H/J bolt‑in fuses)
- Test laboratories and conformity assessors
- Procurement and quality teams specifying HV fuse-links for EVs
Practical applications include battery disconnect fuses, main DC power distribution protection, and high-voltage circuit protection in road vehicles.

Related standards

ISO 8820-1 - Definitions and general test requirements (use in conjunction)
ISO 8820-2 - Other fuse-link parts in the series
ISO 6722-1 - Road vehicle single-core cable dimensions and test requirements

Keywords: ISO 8820-8, fuse-links, bolt-in contacts, Type H, Type J, 450 V DC, automotive fuses, high-voltage vehicle fuses, breaking capacity, voltage drop, transient cycling.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope & marking
- Applies to fuse-links with bolt‑in contacts (Type H, J) for 450 V DC systems.
- Fuse-links must be permanently marked with rated current, manufacturer/trademark and "450 V DC".
Mechanical & dimensional requirements
- Detailed dimensions for Type H and Type J bolt‑in fuses are specified.
- Strength of terminals and mounting torque requirements are given.
Electrical performance and tests
- Breaking capacity: tested at 2 000 A, 450 V DC.
- Voltage drop: measured across fuse tabs after rated current for 15 min; limits defined per type and rating.
- Transient current cycling: endurance tests (e.g., 50 000 cycles) to verify long‑term performance.
- Operating time‑rating: time‑to‑clear requirements at multiple test currents (see operating time tables).
- Temperature rise and resistance to temperature shock tests to ensure thermal reliability.
- Connection resistance and test fixture requirements (e.g., connection resistance ≤ 0.35 mΩ; fuses tested at least 150 mm apart).
Environmental & chemical loads
- Environmental conditioning follows ISO 8820-1; chemical exposure tests use wipe procedures (no immersion).
Test cabling
- Test cable sizes and conductor specifications refer to ISO 6722-1 (thick wall cables).

Applications and who uses this standard

Designed for electric and hybrid vehicle high-voltage distribution and battery protection systems.
Primary users:
- Automotive OEM electrical system designers and engineers
- Fuse and component manufacturers (Type H/J bolt‑in fuses)
- Test laboratories and conformity assessors
- Procurement and quality teams specifying HV fuse-links for EVs
Practical applications include battery disconnect fuses, main DC power distribution protection, and high-voltage circuit protection in road vehicles.

Related standards

ISO 8820-1 - Definitions and general test requirements (use in conjunction)
ISO 8820-2 - Other fuse-link parts in the series
ISO 6722-1 - Road vehicle single-core cable dimensions and test requirements

Keywords: ISO 8820-8, fuse-links, bolt-in contacts, Type H, Type J, 450 V DC, automotive fuses, high-voltage vehicle fuses, breaking capacity, voltage drop, transient cycling.

ISO 8820-8:2019 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and who uses this standard

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications and who uses this standard

Related standards

Related standards

Road vehicles — Fuse-links — Part 1: Definitions and general test requirements

Road vehicles — Fuse-links — Part 2: User's guide

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