SINOFUSE EV323 250VDC Fuse Series Selection Guide
The SINOFUSE EV323 series is a family of 250VDC bolt-connected fuses for road-vehicle applications, covering rated currents from 16A to 500A. The manufacturer series includes three mechanical configurations — 2GL, 3NL and 3NM — with different current ranges, terminal arrangements, breaking capacities and installation requirements.
This technical selection guide summarizes the complete EV323 range, including all manufacturer-listed model numbers, rated currents, pre-arcing I²t, total clearing I²t, power loss, breaking capacity and installation information.
Buyers looking for currently listed models can browse the SINOFUSE EV323 250VDC Fuse Collection.
EV323 Series Technical Overview
| Manufacturer | SINOFUSE |
| Series | EV323 |
| Product Type | Road-Vehicle Bolt-Connected Fuse |
| Rated Voltage | 250VDC |
| Rated Current Range | 16A–500A |
| Mechanical Versions | 2GL / 3NL / 3NM |
| 2GL Breaking Capacity | 30kA, L/R ≤7ms |
| 3NL / 3NM Breaking Capacity | 50kA, L/R ≤5ms |
| Performance Reference | JASO D622 |
| Environmental Reliability | ISO 8820 / JASO D622 / GB/T 31465 |
| Compliance | RoHS |
EV323 2GL vs 3NL vs 3NM
The three EV323 mechanical configurations should not be treated as interchangeable simply because they share the same voltage or current rating. Their terminal structures, mounting hardware and breaking-capacity specifications differ.
| Version | Current Range | Terminal Structure | Bolt | Recommended Torque | Breaking Capacity |
|---|---|---|---|---|---|
| 2GL | 16A–180A | Bottom-out bolt connection | M6 | 6 N·m | 30kA, L/R ≤7ms |
| 3NL | 50A–500A | Bottom-out bolt connection | M8 | 12 N·m | 50kA, L/R ≤5ms |
| 3NM | 50A–500A | Center-out bolt connection | M8 | 12 N·m | 50kA, L/R ≤5ms |
Complete EV323 Model Selection Table
The official EV323 selection specification covers 41 exact model numbers. The values below are manufacturer-listed typical data at the specified maximum breaking-capacity test conditions.
| Model | Current | Pre-Arcing I²t | Total I²t | Power Loss |
|---|---|---|---|---|
| EV323-2GL — 250VDC, M6, 6 N·m, 30kA | ||||
| EV323-2GL16A | 16A | 19 A²s | 99 A²s | 2.6W |
| EV323-2GL20A | 20A | 30 A²s | 154 A²s | 3.2W |
| EV323-2GL25A | 25A | 60 A²s | 302 A²s | 3.5W |
| EV323-2GL32A | 32A | 99 A²s | 499 A²s | 4.5W |
| EV323-2GL35A | 35A | 122 A²s | 616 A²s | 4.9W |
| EV323-2GL40A | 40A | 176 A²s | 886.5 A²s | 5.5W |
| EV323-2GL50A | 50A | 313 A²s | 1,576 A²s | 6.5W |
| EV323-2GL63A | 63A | 540 A²s | 2,715 A²s | 7.9W |
| EV323-2GL80A | 80A | 959 A²s | 4,827 A²s | 11W |
| EV323-2GL100A | 100A | 1,586 A²s | 7,979 A²s | 13W |
| EV323-2GL125A | 125A | 2,821 A²s | 14,184.5 A²s | 16W |
| EV323-2GL160A | 160A | 4,860 A²s | 24,435 A²s | 21W |
| EV323-2GL180A | 180A | 6,347 A²s | 31,915 A²s | 24W |
| EV323-3NL — 250VDC, M8, 12 N·m, 50kA | ||||
| EV323-3NL50A | 50A | 165 A²s | 598 A²s | 7.1W |
| EV323-3NL63A | 63A | 300 A²s | 1,083 A²s | 8.3W |
| EV323-3NL80A | 80A | 564 A²s | 1,962 A²s | 10W |
| EV323-3NL100A | 100A | 972 A²s | 3,690 A²s | 12W |
| EV323-3NL125A | 125A | 1,568 A²s | 6,357 A²s | 15W |
| EV323-3NL160A | 160A | 2,701 A²s | 10,251 A²s | 19.2W |
| EV323-3NL180A | 180A | 3,588 A²s | 17,658 A²s | 21.4W |
| EV323-3NL200A | 200A | 4,803 A²s | 23,450 A²s | 23.2W |
| EV323-3NL250A | 250A | 7,940 A²s | 31,392 A²s | 29.2W |
| EV323-3NL315A | 315A | 12,739 A²s | 51,893 A²s | 38.1W |
| EV323-3NL350A | 350A | 16,566 A²s | 83,260 A²s | 42.3W |
| EV323-3NL400A | 400A | 23,247 A²s | 108,271 A²s | 48.5W |
| EV323-3NL450A | 450A | 30,364 A²s | 151,938 A²s | 55.5W |
| EV323-3NL500A | 500A | 38,430 A²s | 198,450 A²s | 63W |
| EV323-3NM — 250VDC, M8, 12 N·m, 50kA | ||||
| EV323-3NM50A | 50A | 165 A²s | 598 A²s | 7.1W |
| EV323-3NM63A | 63A | 300 A²s | 1,083 A²s | 8.3W |
| EV323-3NM80A | 80A | 564 A²s | 1,962 A²s | 10W |
| EV323-3NM100A | 100A | 972 A²s | 3,690 A²s | 12W |
| EV323-3NM125A | 125A | 1,568 A²s | 6,357 A²s | 15W |
| EV323-3NM160A | 160A | 2,701 A²s | 10,251 A²s | 19.2W |
| EV323-3NM180A | 180A | 3,588 A²s | 17,658 A²s | 21.4W |
| EV323-3NM200A | 200A | 4,803 A²s | 23,450 A²s | 23.2W |
| EV323-3NM250A | 250A | 7,940 A²s | 31,392 A²s | 29.2W |
| EV323-3NM315A | 315A | 12,739 A²s | 51,893 A²s | 38.1W |
| EV323-3NM350A | 350A | 16,566 A²s | 83,260 A²s | 42.3W |
| EV323-3NM400A | 400A | 23,247 A²s | 108,271 A²s | 48.5W |
| EV323-3NM450A | 450A | 30,364 A²s | 151,938 A²s | 55.5W |
| EV323-3NM500A | 500A | 38,430 A²s | 198,450 A²s | 63W |
Understanding I²t in EV323 Fuse Selection
Rated current alone does not describe how a fuse behaves during a fault. Pre-arcing I²t describes the energy associated with the period before the fuse element opens, while total clearing I²t represents the complete interruption process.
These values differ significantly across the EV323 current range and should be reviewed when coordinating protection for batteries, power-conversion equipment, chargers, conductors and other DC components.
The manufacturer states that the I²t figures in the selection table are typical values measured under the specified breaking-capacity conditions: 2GL at 30kA / L/R=7ms and 3NL / 3NM at 50kA / L/R=5ms.
Typical EV323 Applications
According to the manufacturer selection specification, EV323 fuses may be used for short-circuit, overload and back-up protection in applications including:
- Electric vehicle drive power systems
- Traction and power battery systems
- Battery energy storage
- Power conversion systems
- Energy-storage capacitors
- Variable-frequency control equipment
- Charging equipment
- Vehicle wiring and related electrical equipment
Final fuse selection should always be based on the complete system design, expected fault current, operating environment and required protection coordination.
Continuous Current and Temperature Considerations
Under the manufacturer's stated normal operating conditions, the recommended long-term continuous current is generally no more than 80% of the fuse rated current.
| Condition | Manufacturer Guidance |
|---|---|
| Normal Ambient Temperature | -5°C to 40°C |
| Permitted Ambient Range | -40°C to 120°C |
| Normal Altitude | Up to 2,000m |
| Permitted Altitude | Up to 4,500m with application-specific evaluation / correction as required |
Operation above 40°C, high-altitude installation, enclosed environments, forced-air cooling or conductor liquid cooling may change the fuse's effective current-carrying capability. Appropriate derating or engineering evaluation may therefore be required.
Mechanical Installation and Vibration
The EV323 series is designed for road-vehicle environments and is specified for resistance to temperature shock, mechanical vibration / shock, current shock and chemical loads.
Manufacturer documentation states that the series meets vibration requirements associated with road-vehicle applications. Installation surfaces and fuse terminals should be connected securely to avoid abnormal mechanical stress and additional vibration.
- 2GL: M6 mounting, recommended torque 6 N·m
- 3NL: M8 mounting, recommended torque 12 N·m
- 3NM: M8 mounting, recommended torque 12 N·m
Representative EV323 Products at Apexon Supply
Apexon Supply currently lists multiple EV323 models across all three mechanical configurations. Representative examples include:
- EV323-2GL160A — 160A, 250VDC, 2GL, 30kA
- EV323-3NL250A — 250A, 250VDC, 3NL, 50kA
- EV323-3NM450A — 450A, 250VDC, 3NM, 50kA
View all currently listed models in the SINOFUSE EV323 Collection.
How to Select an EV323 Replacement
Before replacing an existing EV323 fuse, verify:
- Complete EV323 model number
- 2GL, 3NL or 3NM mechanical version
- Rated current and system voltage
- Required breaking capacity
- Pre-arcing and total I²t
- Power loss
- Terminal arrangement and mounting dimensions
- Bolt size and tightening torque
- Ambient temperature and continuous operating current
- Altitude, cooling and installation environment
A fuse with the same nominal current is not automatically an equivalent replacement if its mechanical structure, breaking capacity or I²t characteristics differ.
EV323 Frequently Asked Questions
What voltage is the SINOFUSE EV323 series rated for?
The EV323 series is rated at 250VDC.
What current ratings are available?
The complete manufacturer range covers 16A to 500A, depending on the 2GL, 3NL or 3NM mechanical configuration.
What is the difference between EV323-2GL and EV323-3NL / 3NM?
2GL covers lower current ratings with M6 bottom-out bolt connections and a 30kA breaking-capacity specification. 3NL and 3NM use M8 mounting and are specified at 50kA. 3NL uses a bottom-out terminal arrangement, while 3NM uses a center-out arrangement.
Are 3NL and 3NM electrically identical?
Models with the same current rating share the manufacturer-listed I²t and power-loss values in this selection specification, but their mechanical terminal structures differ. Mechanical compatibility must therefore still be confirmed.
Can an EV323 fuse operate continuously at its full rated current?
The manufacturer's guidance recommends long-term continuous current at generally no more than 80% of rated current under the stated normal operating conditions. Actual application requirements may require additional thermal evaluation.
Can Apexon Supply help identify an EV323 fuse from a label?
Yes. Provide the complete model number, product-label photo, required quantity and equipment or application information when available for sourcing review.
EV323 B2B Sourcing and RFQ Support
Apexon Supply supports industrial and automotive buyers with:
- Exact EV323 MPN sourcing
- Manufacturer datasheet review
- Electrical and I²t specification verification
- Mechanical configuration review
- Product-label and photo checking
- RFQ and bulk quotation
- Proforma invoice preparation
- International delivery coordination
For faster quotation, provide the complete EV323 model number, required quantity, product-label photo and delivery country.
Browse SINOFUSE EV323 Models | Browse All SINOFUSE Products
Independent Supplier Notice
Apexon Supply is an independent industrial parts sourcing supplier and is not presented as an authorized SINOFUSE distributor or representative. SINOFUSE trademarks, model numbers, product names and other identifiers belong to their respective owners and are used solely for product identification, technical reference and procurement purposes.