MERSEN FUSE 6,9 URD 33 D08 A 0450 PC33UD69V450A

Q: What are the electrical ratings of the T302168?

The fuse is rated at 450 A, 690 VAC (IEC) and 700 VAC (UL) with a breaking capacity of 200 kA AC.

High-speed aR characteristic fuse with integrated striker indication and DIN 80 blade terminals, rated for 450A at 690VAC IEC and 700VAC UL standards, designed for semiconductor protection in industrial power electronics.

SKU: T302168Alt SKU: PC33UD69V450AMPN: T302168

List Price £157.79 ex VAT

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Manufacturer Lead Time

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Why Choose the Mersen T302168 Semiconductor Fuse?

The Mersen T302168 is a high-speed aR semiconductor protection fuse designed to provide exceptional short-circuit protection for modern power semiconductor devices. Part of Mersen's renowned Protistor® range, this square body fuse is rated at 450 A, 690 VAC (IEC) and 700 VAC (UL), featuring a Size 33 body with DIN 80 blade terminals and an integrated striker for indication or microswitch operation. It is specifically engineered to protect IGBTs, thyristors, SCRs and diode modules used in demanding power conversion equipment.

Protistor® semiconductor fuses are manufactured using precision die-cut fuse elements embedded within solidified silica sand to deliver extremely low let-through energy (I²t), rapid fault interruption and high breaking capacity. Silver-plated contacts and non-magnetic hardware further enhance reliability in demanding industrial environments.

The Mersen T302168 is ideal for OEM equipment, industrial maintenance and replacement applications where this exact manufacturer reference has been specified. Always verify the electrical ratings and mounting arrangement before installation.

Key Advantages

Genuine Mersen Protistor® semiconductor protection fuse.
Ultra-fast aR operating characteristic.
Rated 450 A.
Rated 690 VAC IEC / 700 VAC UL.
High interrupting capacity of 200 kA.
Integrated striker for remote indication or microswitch operation.

Key Features

Manufacturer: Mersen
Part number: T302168
Catalogue number: PC33UD69V450A.
Protistor® Size 33 square body construction.
aR semiconductor protection characteristic.
DIN 80 blade terminals.
Silver-plated contact surfaces.
Integrated striker (trip indicator).
Designed for semiconductor device protection.
RoHS compliant.

Designed for Modern Power Electronics

Power electronic equipment requires extremely rapid fault interruption to prevent catastrophic semiconductor damage. The Mersen T302168 has been engineered to minimise let-through energy while providing dependable protection for sensitive semiconductor devices operating in industrial power conversion systems.

Typical applications include variable speed drives, industrial inverters, UPS systems, DC drives, rectifiers, renewable energy converters, battery storage systems and other equipment incorporating high-power semiconductor devices.

Typical Applications

Variable speed drives (VSDs).
Industrial inverters.
UPS systems.
Power converters.
Rectifiers.
Soft starters.
Renewable energy power conversion equipment.
OEM industrial machinery.

Technical Specifications

Item number	T302168
Catalogue No	PC33UD69V450A
Description	Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 450A With Striker DIN 80 Blades
EAN/UPC Code	3605340351255
Rated voltage AC UL	700 V
Rated voltage AC IEC	690 V
Ampere Rating	450 A
RoHS Compliant	Yes
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	33
Mounting	Bolted
Clearing I2t At Rated Voltage	87 kA²s
Melting I2t	13.45 kA²s
AC Max I.R./Breaking Capacity	I1: 200 kA
Design Details	Standard Terminal
Indication System	Yes
Indication System Type	Striker
Connection/Terminal Material	Silver-Plated Copper
Connection/Terminal Type	DIN 80 Blades
Product Width	73 mm
Product Length	110 mm
Product Height	78.5 mm
Sell Pack Quantity	3 EA
Sell Pack Weight	2.4369 kg
Sell Pack Width	145 mm
Sell Pack Length	250 mm
Sell Pack Height	90 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	0.8123 kg
Power Dissipation at Rated Current Value	88 W
HS Code	85361090
Fuse Type	D / D0 (Neozed/Diazed), Semiconductor
Fuse Class	aR
Voltage	690 V

Frequently Asked Questions

What is the Mersen T302168 used for?

The T302168 is a high-speed aR semiconductor protection fuse designed to protect IGBTs, SCRs, thyristors and diode modules against short-circuit faults.

What are the electrical ratings of the T302168?

The fuse is rated at 450 A, 690 VAC (IEC) and 700 VAC (UL) with a breaking capacity of 200 kA AC.

Does the Mersen T302168 include a striker?

Yes. The fuse incorporates an integrated striker which can provide visual indication or operate a compatible microswitch after fuse operation.

What does the aR fuse classification mean?

An aR fuse provides partial-range protection specifically designed for semiconductor devices, delivering extremely rapid interruption of high fault currents.

Where is the T302168 commonly installed?

It is commonly installed within variable speed drives, converters, UPS systems, industrial inverters, rectifiers and other semiconductor-based power conversion equipment.

Trusted Semiconductor Protection

Mersen Protistor® semiconductor fuses are trusted worldwide by equipment manufacturers, panel builders and maintenance engineers for protecting critical power electronic systems in demanding industrial environments.

Item number	T302168
Catalogue No	PC33UD69V450A
Description	Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 450A With Striker DIN 80 Blades
EAN/UPC Code	3605340351255
Rated voltage AC UL	700 V
Rated voltage AC IEC	690 V
Ampere Rating	450 A
RoHS Compliant	Yes
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	33
Mounting	Bolted
Clearing I2t At Rated Voltage	87 kA²s
Melting I2t	13.45 kA²s
AC Max I.R./Breaking Capacity	I1: 200 kA
Design Details	Standard Terminal
Indication System	Yes
Indication System Type	Striker
Connection/Terminal Material	Silver-Plated Copper
Connection/Terminal Type	DIN 80 Blades
Product Width	73 mm
Product Length	110 mm
Product Height	78.5 mm
Sell Pack Quantity	3 EA
Sell Pack Weight	2.4369 kg
Sell Pack Width	145 mm
Sell Pack Length	250 mm
Sell Pack Height	90 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	0.8123 kg
Power Dissipation at Rated Current Value	88 W
HS Code	85361090
Fuse Type	D / D0 (Neozed/Diazed), Semiconductor
Fuse Class	aR
Voltage	690 V

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