Ferraz Shawmut FR10GB69V Series 690VAC 10x38mm Semiconductor Fuses
The Ferraz Shawmut Protistor FR10GB69V Series is a family of 10x38mm ferrule-type semiconductor protection fuses rated at 690VAC. The series is designed for electrical applications requiring high breaking capacity and the protection characteristics specified in the manufacturer's Protistor fuse documentation.
The original Ferraz Shawmut catalog identifies 17 FR10GB69V part numbers with rated currents from 1A to 32A. The principal approved product range covers 1A to 30A, while the 32A model is explicitly identified as a non-approval rating. Most models carry a gRB designation, with the 1A model specifically designated gRC in the original reference table.
This technical guide covers the manufacturer's catalog references, electrical performance, I²t characteristics, mechanical dimensions, protection considerations, and model identification requirements for the FR10GB69V family.
FR10GB69V Series Technical Specifications
- Manufacturer: Ferraz Shawmut
- Manufacturer Association: Mersen
- Product Family: Protistor FR10GB69V
- Product Type: Semiconductor (AC) ferrule fuse
- Rated Voltage: 690VAC
- Nominal Size: 10x38mm
- Listed Current Ratings: 1A to 30A, plus 32A non-approval rating
- Fuse Characteristics: gRB, with gRC designation for the 1A model
- Published Breaking Capacity: 160kA at 690VAC (IEC)
- Fuse Indication: Without trip indicator
- Manufacturer Packaging: 10 pieces per package
- Maximum Unit Weight: 10g
- Manufacturer Document References: SCAC166, SCAC167, SCAC168 and SCAC169
Important: The FR10GB69V32 model is marked "Non approval rating" in the original manufacturer catalog. Its approval status should not be inferred from the other models in the family.
Key Characteristics
The FR10GB69V family combines a compact cylindrical ferrule format with semiconductor-oriented protection characteristics.
- 690VAC rated voltage
- Compact 10x38mm cylindrical format
- Published 160kA IEC breaking capacity at 690VAC
- Current ratings covering a broad range of semiconductor protection requirements
- Manufacturer-published pre-arcing and total operating I²t data
- Time-current and cut-off characteristic curves
- Published arc-voltage characteristics
- Individual catalog numbers and manufacturer reference numbers
Complete FR10GB69V Model Range
The original manufacturer reference table identifies the following 17 catalog numbers. Exact catalog numbers and manufacturer reference numbers are important for identification and replacement procurement.
| Catalog Number | Rated Current | Manufacturer Ref. No. | Original Designation |
|---|---|---|---|
| FR10GB69V1 | 1A | Z330279 | gRC |
| FR10GB69V1.25 | 1.25A | X330001 | gRB |
| FR10GB69V1.5 | 1.5A | Y330002 | gRB |
| FR10GB69V2 | 2A | Z330003 | gRB |
| FR10GB69V2.5 | 2.5A | A330004 | gRB |
| FR10GB69V3 | 3A | B330005 | gRB |
| FR10GB69V4 | 4A | C330006 | gRB |
| FR10GB69V5 | 5A | D330007 | gRB |
| FR10GB69V6 | 6A | E330008 | gRB |
| FR10GB69V8 | 8A | F330009 | gRB |
| FR10GB69V10 | 10A | G330010 | gRB |
| FR10GB69V12.5 | 12.5A | H330011 | gRB |
| FR10GB69V16 | 16A | J330012 | gRB |
| FR10GB69V20 | 20A | K330013 | gRB |
| FR10GB69V25 | 25A | L330014 | gRB |
| FR10GB69V30 | 30A | M330015 | gRB |
| FR10GB69V32 | 32A* | Y330278 | gRB* |
*32A Note: FR10GB69V32 is explicitly identified by Ferraz Shawmut as a non-approval rating. Confirm its suitability and required approval status before specification or purchase.
Electrical Performance and I²t Characteristics
The manufacturer provides pre-arcing I²t, total operating I²t, and dissipated power values for the FR10GB69V family.
Pre-arcing I²t is specified at a 1ms reference condition. The manufacturer also provides total operating I²t values and steady-state power dissipation at rated current and at 80% of rated current.
The following values are reproduced from the historical Ferraz Shawmut SCAC166 table. They should be interpreted with the original manufacturer's explanatory notes and test conditions.
| Current (A) | Pre-Arcing I²t (A²s) | Total Operating I²t (A²s) | Power at In (W) | Power at 0.8 In (W) |
|---|---|---|---|---|
| 1 | 0.075 | 0.28 | 0.9 | 0.52 |
| 1.25 | 0.115 | 0.36 | 1.25 | 0.7 |
| 1.5 | 0.185 | 0.57 | 1.5 | 0.81 |
| 2 | 0.42 | 1.3 | 2 | 1.1 |
| 2.5 | 0.88 | 2.7 | 2.1 | 1.15 |
| 3 | 1.55 | 4.6 | 2.3 | 1.25 |
| 4 | 4 | 12 | 2.6 | 1.35 |
| 5 | 8.6 | 25 | 2.7 | 1.4 |
| 6 | 15 | 44 | 2.9 | 1.5 |
| 8 | 3.3 | 33 | 2.4 | 1.35 |
| 10 | 5.4 | 55 | 3.4 | 1.85 |
| 12.5 | 8.5 | 82 | 3.4 | 1.9 |
| 16 | 16 | 145 | 4.1 | 2.3 |
| 20 | 230 | 250 | 4.3 | 2.4 |
| 25 | 58 | 470 | 4.7 | 2.7 |
| 30 | 96 | 740 | 5 | 2.9 |
Data Verification Note: The historical SCAC166 table labels its total operating I²t column at 660VAC, while the accompanying explanatory text references 690VAC. The published pre-arcing values also contain non-monotonic entries, including the 8A and 20A rows. These values are retained as printed in the original document, not independently validated. Confirm the applicable manufacturer data before using them for engineering protection-coordination calculations.
The original table combines 30A and 32A in one row for certain performance values. Independent 32A performance values are not established by that table and are therefore not separately presented here.
Understanding Fuse I²t and Semiconductor Protection
High-speed semiconductor protection requires consideration of how much electrical energy is transferred into the protected circuit during a fault.
Pre-arcing I²t represents the current-squared integral accumulated before the fuse element melts.
Total operating I²t includes the current-squared integral accumulated through the complete interruption process.
Engineers should compare the relevant fuse characteristics with the withstand limits and protection requirements of the connected semiconductor devices or electrical equipment.
A fuse with the same rated current and voltage as another model may have different time-current characteristics, I²t values, arc-voltage behavior, and protection performance.
Time-Current Characteristics
The manufacturer provides time-current characteristic curves for two current ranges:
- 1A to 6A
- 8A to 30A
These curves show pre-arcing time as a function of the prospective current expressed as an RMS value.
The original documentation specifies current tolerances of approximately ±10% for ratings from 1A to 6A and ±9% for ratings from 8A to 30A.
The applicable time-current curve should be consulted when evaluating fuse operation under overload or short-circuit conditions.
Peak Arc Voltage and Current Limitation
The original manufacturer table provides peak arc-voltage information for the FR10GB69V range.
- 1A to 6A: Published peak arc voltage of 2500V
- 8A to 30A: Published peak arc voltage of 1450V
The manufacturer also provides cut-off characteristics showing the peak current that may be reached as a function of prospective fault current.
These characteristics should be considered when evaluating the fuse alongside the insulation and fault-withstand requirements of protected semiconductor devices and associated equipment.
Mechanical Dimensions and Installation
The FR10GB69V family uses a cylindrical ferrule-style fuse construction.
According to the original manufacturer dimensional drawing:
- Nominal Fuse Size: 10x38mm
- Overall Length: 38 ±0.6mm
- Body Diameter: 10.3 ±0.1mm
- Trip Indicator: None
- Maximum Unit Weight: 10g
- Manufacturer Packaging: 10 pieces
The mechanical 10x38mm format does not establish electrical interchangeability with every other 10x38mm fuse.
Before replacement, engineers should verify the exact catalog number, rated voltage, rated current, fuse characteristic, breaking capacity, physical dimensions, and compatibility with the installed fuse holder.
AC and DC Application Considerations
The FR10GB69V family is documented by Ferraz Shawmut primarily as a 690VAC semiconductor fuse series.
The original manufacturer catalog also includes DC working-voltage possibility curves based on DC operating voltage and the L/R time constant of the fault circuit.
However, these curves do not establish a single unconditional DC voltage rating for the complete FR10GB69V series.
For DC applications, engineers must review the original manufacturer curves and verify the actual system voltage, fault-current characteristics, circuit time constant, and applicable operating conditions.
Do not assume that a fuse rated at 690VAC is automatically suitable for a DC system at the same nominal voltage.
Typical Applications and Protection Considerations
Ferraz Shawmut categorizes the FR10GB69V family as semiconductor (AC) fuses.
These fuses are intended for semiconductor protection applications where the electrical characteristics of the selected rating are compatible with the protection requirements of the circuit.
Potential applications for technical evaluation include:
- Industrial semiconductor protection circuits
- Power-electronic equipment
- Rectifier and converter protection circuits
- Industrial control and power conversion equipment
- Maintenance and replacement of equipment using specified FR10GB69V fuse references
These application examples do not establish suitability for every installation. Selection must be based on the exact equipment requirements and the applicable manufacturer technical data.
Legacy Ferraz Shawmut and Mersen Part Numbers
Industrial equipment documentation may refer to older Ferraz Shawmut catalog numbers, manufacturer reference numbers, or alternative product designations.
For the FR10GB69V family, the original manufacturer catalog provides both a catalog number and a corresponding reference number for each listed rating.
These identifiers can help industrial buyers match legacy maintenance records, fuse markings, equipment documentation, and procurement requests.
Mersen also publishes technical information for other Protistor 10x38mm fuse families. However, similarity in dimensions, rated voltage, current, or product naming does not establish direct interchangeability between FR10GB69V and another fuse family.
Replacement suitability should be verified against the applicable manufacturer documentation before ordering or installation.
FR10GB69V Model Selection Checklist
Before selecting a Ferraz Shawmut FR10GB69V fuse, engineers and procurement professionals should verify:
- Exact FR10GB69V catalog number
- Manufacturer reference number
- Original gRB or gRC designation
- Required rated current
- Applicable AC voltage rating
- Prospective short-circuit current
- Required breaking capacity
- Time-current characteristics
- Pre-arcing and total operating I²t
- Peak arc-voltage characteristics
- Fuse dimensions and holder compatibility
- Any required approval or certification status
- DC operating conditions, if applicable
For the FR10GB69V32 non-approval rating, particular care should be taken to confirm whether its use is permitted under the applicable equipment and project requirements.
Browse Ferraz Shawmut FR10GB69V Models
Apexon Supply provides the Ferraz Shawmut Protistor FR10GB69V Series through a dedicated multi-variant product page.
The product page includes the 17 listed manufacturer catalog numbers and supports model-specific purchasing and sourcing inquiries.
View Ferraz Shawmut FR10GB69V 690VAC Semiconductor Fuse Models
Related Ferraz Shawmut and Mersen Resources
For additional fuse families, sourcing information, and related semiconductor protection products, explore:
Manufacturer Documentation Reference
This technical guide is based on the historical Ferraz Shawmut publication "Semiconductor (AC) Fuses – Other Protistor Fuses – Ferrule Fuses – 10x38 gRB – 690VAC."
Manufacturer document references include SCAC166, SCAC167, SCAC168 and SCAC169, marked 12/04.
The separate 10x38 URB, URD and URL 500–600VAC fuse families appearing elsewhere in the supplied document are not part of the FR10GB69V model range.
Because the source documentation is historical, engineering-critical parameters and current approval requirements should be verified with the applicable manufacturer documentation before final equipment specification or replacement.
Industrial Sourcing and Technical Support
Apexon Supply supports global B2B sourcing for Ferraz Shawmut, Mersen, and related industrial circuit protection products.
We assist industrial buyers with part-number identification, specification review, legacy reference matching, technical cross-reference, and international sourcing coordination.
For FR10GB69V availability, technical information, or quotation requests, please provide the exact catalog number, manufacturer reference number, required quantity, and delivery destination.
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