SIBA NH000 & NH00 690V gRL (gS) Fuse Links
SIBA NH000 and NH00 690 V fuse-links are knife-contact fuse-links designed for applications requiring the gRL (gS) operating class specified in IEC 60269-4. The range covered here extends from 16 A to 200 A and includes two physical size groups: NH000 for 16–80 A ratings and NH00 for 100–200 A ratings.
The series includes SIBA article numbers beginning with 20 477 34 for the NH000 range and 20 209 34 for the NH00 range. Individual current ratings are identified by the suffix in the complete article number, such as 20 209 34.125 for the 125 A version.
Apexon Supply is an independent global B2B sourcing supplier for industrial electrical components and difficult-to-find replacement parts. We can assist buyers with SIBA part-number verification, datasheet review, sourcing coordination, and international order handling when a specific fuse-link is required.
SIBA 690 V NH000 and NH00 Fuse-Link Range
This SIBA family combines knife-contact construction with gRL (gS) operating characteristics. According to the manufacturer datasheet, the range is specified to IEC 60269-4 and VDE 0636-4, with additional UL 248-13 voltage information provided for the listed models.
The IEC rated voltage is 690 V across the range, while the UL-rated voltage shown in the datasheet is 700 V. Rated currents extend from 16 A through 200 A. Buyers should always select the exact SIBA article number and current rating required by the equipment rather than selecting a fuse only by physical size or nominal voltage.
Two Size Groups: NH000 and NH00
NH000: 16 A to 80 A
The NH000 portion of the series uses the 20 477 34 article-number family. Available ratings documented in the datasheet are 16 A, 20 A, 25 A, 32 A, 35 A, 40 A, 50 A, 63 A, and 80 A.
Representative complete article numbers include 20 477 34.16, 20 477 34.40, 20 477 34.63, and 20 477 34.80. These versions have a listed unit weight of approximately 0.13 kg.
NH00: 100 A to 200 A
The higher-current NH00 group uses the 20 209 34 article-number family. The documented ratings are 100 A, 125 A, 160 A, and 200 A.
Examples include 20 209 34.100, 20 209 34.125, 20 209 34.160, and 20 209 34.200. The manufacturer lists an approximate unit weight of 0.21 kg for these NH00 versions.
This distinction is important when replacing an installed fuse-link. An NH000 model and an NH00 model may share the same voltage class and operating-class designation, but they belong to different size groups and should not be treated as interchangeable without confirming the equipment requirements.
Representative SIBA Models and Electrical Data
The following table summarizes the individual ratings documented for this SIBA NH000/NH00 690 V family. The values should be used together with the complete manufacturer datasheet when selecting a replacement.
| Rated Current | SIBA Article No. | Size | Pre-Arcing I2t | Total I2t at AC 690 V | Power Loss |
|---|---|---|---|---|---|
| 16 A | 20 477 34.16 | NH000 | 18 A2s | 180 A2s | 3.2 W |
| 20 A | 20 477 34.20 | NH000 | 41 A2s | 410 A2s | 3.6 W |
| 25 A | 20 477 34.25 | NH000 | 74 A2s | 740 A2s | 4.2 W |
| 32 A | 20 477 34.32 | NH000 | 170 A2s | 1,700 A2s | 5.0 W |
| 35 A | 20 477 34.35 | NH000 | 170 A2s | 1,700 A2s | 5.2 W |
| 40 A | 20 477 34.40 | NH000 | 300 A2s | 3,000 A2s | 5.6 W |
| 50 A | 20 477 34.50 | NH000 | 460 A2s | 4,600 A2s | 6.5 W |
| 63 A | 20 477 34.63 | NH000 | 840 A2s | 8,400 A2s | 7.6 W |
| 80 A | 20 477 34.80 | NH000 | 1,800 A2s | 18,000 A2s | 8.8 W |
| 100 A | 20 209 34.100 | NH00 | 3,000 A2s | 30,000 A2s | 10.5 W |
| 125 A | 20 209 34.125 | NH00 | 6,000 A2s | 60,000 A2s | 12 W |
| 160 A | 20 209 34.160 | NH00 | 10,400 A2s | 80,000 A2s | 17 W |
| 200 A | 20 209 34.200 | NH00 | 16,000 A2s | 110,000 A2s | 21 W |
These examples represent the models documented in the referenced SIBA series. When purchasing a replacement, use the complete article number wherever possible rather than relying only on the ampere rating.
Rated Breaking Capacity
SIBA specifies several rated breaking-capacity values for this fuse-link family. The manufacturer datasheet lists 100 kA at AC 760 V, 200 kA at AC 700 V, and 25 kA at DC 220 V with L/R = 10 ms. It also lists 210 kA at AC 800 V for the 100–160 A ratings.
Breaking-capacity information is a critical selection parameter. A replacement fuse should not be chosen solely because its current rating and physical size appear similar. The system voltage, prospective fault current, required protection characteristic, and applicable equipment specification should all be checked before installation.
Time-Current and Cut-Off Characteristics
The SIBA technical documentation for this series includes time-current curves and cut-off current characteristics covering the available current ratings. These curves help qualified engineers evaluate the fuse behavior under overcurrent and short-circuit conditions.
For replacement work, especially in power-electronic equipment, the complete protection coordination of the original design should be preserved. Current rating alone does not define fuse performance. Pre-arcing I2t, total I2t, operating class, breaking capacity, physical size, and the equipment manufacturer's specified part number may all affect suitability.
How to Select the Correct SIBA Fuse-Link
Before ordering a SIBA NH000 or NH00 fuse-link, confirm the information on the existing fuse, equipment documentation, or manufacturer datasheet. Useful selection data includes:
- Complete SIBA article number: for example, 20 209 34.125.
- Rated current: verify the required ampere rating rather than substituting a nearby value.
- Rated voltage: this family is specified at 690 V under IEC data and 700 V under the UL data shown by SIBA.
- Fuse size: confirm whether the application requires NH000 or NH00.
- Operating class: confirm the required gRL (gS) characteristic.
- Breaking capacity: verify suitability for the electrical system and prospective fault current.
- I2t requirements: compare pre-arcing and total I2t values when they are relevant to the protected equipment.
- Physical dimensions: check the SIBA dimensional drawing when replacing an existing component.
If the installed part number is unclear, a clear photograph of the fuse label or equipment nameplate can often help identify the correct model before sourcing begins.
Understanding SIBA 20 209 34.125
One frequently referenced part in this family is SIBA 20 209 34.125. According to the manufacturer datasheet, this is a 125 A NH00 fuse-link in the 20 209 34 family. It is listed at 690 V under IEC 60269-4 data and 700 V under UL 248-13 data.
For this exact model, SIBA specifies a pre-arcing I2t value of 6,000 A2s, a total I2t value of 60,000 A2s at AC 690 V, and a listed power loss of 12 W. These model-specific values should not be assumed to apply to other current ratings in the same family.
Replacement and Difficult-to-Find SIBA Fuse Sourcing
Industrial fuse requirements often arise from maintenance rather than new equipment projects. A machine may have been operating for many years, the original supplier may no longer hold local stock, or the purchasing team may only have an old SIBA article number from the installed component.
Apexon Supply can assist with independent sourcing of original SIBA products when suitable supply is available. The first step is normally to verify the exact article number, current rating, voltage, size, and protection class against available technical documentation.
Where the exact requested part is difficult to obtain, any possible alternative should be evaluated technically before purchase. Similar dimensions or the same current rating do not by themselves establish equivalence. Electrical characteristics, protection behavior, breaking capacity, mounting dimensions, and the requirements of the protected equipment should all be considered.
Apexon does not assume that one fuse can replace another simply because the two products appear similar. When replacement analysis is required, providing the original part number, equipment information, photographs, and relevant datasheets can reduce identification errors and help narrow the sourcing options.
Why Industrial Buyers Work With Apexon Supply
Apexon Supply supports industrial purchasing teams that need more than a simple catalog search. Our focus includes industrial electrical components, automation parts, maintenance replacements, and products that may be difficult to source through standard local channels.
- Part-number verification: review of manufacturer references and technical documentation before quotation.
- Datasheet-based sourcing: key electrical and mechanical information can be checked against the requested model.
- Difficult-to-find part support: assistance with established, specialized, or less commonly stocked industrial components.
- Global B2B order coordination: support for international industrial buyers requiring cross-border supply.
- Replacement review: possible alternatives can be considered when technically appropriate, subject to specification confirmation.
Apexon Supply operates as an independent sourcing supplier and does not represent itself as an authorized SIBA distributor or manufacturer representative.
Frequently Asked Questions
What current ratings are available in this SIBA 690 V series?
The documented range covers 16 A through 200 A. NH000 models cover 16–80 A, while NH00 models cover 100–200 A.
What is the difference between SIBA 20 477 34 and 20 209 34?
They identify two groups within this series. The 20 477 34 family covers the NH000 16–80 A models, while the 20 209 34 family covers the NH00 100–200 A models.
What is SIBA 20 209 34.125?
20 209 34.125 is the 125 A NH00 version in this SIBA fuse-link family. It is specified at 690 V in the IEC data and 700 V in the UL data provided by the manufacturer.
Are all current ratings physically interchangeable?
No assumption of interchangeability should be made. The range includes both NH000 and NH00 sizes, and each application should be checked against the required article number, size, electrical characteristics, and equipment specification.
What standards are listed for this fuse-link family?
The SIBA datasheet identifies IEC 60269-4, VDE 0636-4, and UL 248-13 for the documented series.
Can Apexon help identify a fuse when the exact article number is unknown?
Yes. Send clear photographs of the fuse label, current and voltage markings, physical size information, equipment nameplate, and any available technical documentation. Apexon can use this information to assist with model identification before sourcing.
Can Apexon source difficult-to-find SIBA fuse-links?
Apexon can investigate sourcing for specific SIBA article numbers through independent global supply channels. Availability should be confirmed at the time of inquiry and is not guaranteed for every model.
What information should I include with an RFQ?
Please provide the complete SIBA article number, required quantity, photographs or nameplate information when available, the equipment or application reference if relevant, and the destination country. This helps reduce identification errors and allows the sourcing and shipping requirements to be reviewed efficiently.
Request a Quote for SIBA NH000 or NH00 Fuse Links
If you require a SIBA 20 477 34 or 20 209 34 series fuse-link, send Apexon Supply the exact part number and required quantity. For replacement or identification requests, include photographs of the existing fuse, equipment nameplate, datasheet, and destination country whenever possible.
Our team can review the requested model, confirm the available technical reference, and coordinate sourcing for your industrial purchasing requirement.