TMOV14R300E Equivalent & Substitute Parts

Part Overview

The TMOV14R300E is a 470 V, 6 kA disc varistor manufactured by Littelfuse in the TMOV® series. This component is designed for transient voltage suppression applications requiring through-hole mounting in a 14mm disc package. The part is currently obsolete, making identification of equivalent and substitute components essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	470 V
Current - Surge	6 kA
Maximum AC Volts	300 V
Maximum DC Volts	385 V
Energy	125 J
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 14mm
Number of Circuits	1
Capacitance @ 1 MHz	400 pF

Substitute Part Grouping Explanation

Substitution for the TMOV14R300E is determined by strict equivalence across the following electrical and mechanical parameters:

Varistor voltage range: 423 V (minimum) to 517 V (maximum)
Surge current rating: 6 kA
Maximum AC voltage: 300 V
Maximum DC voltage: 385 V
Energy dissipation: 125 J
Operating temperature: -55°C to 85°C
Mounting configuration: Through hole
Package form factor: Disc 14mm
Circuit count: 1 circuit
Capacitance: 400 pF @ 1 MHz

All substitute parts listed maintain these electrical and mechanical specifications, ensuring functional compatibility in applications originally designed for the TMOV14R300E.

Parameter Comparison

Part Number	Manufacturer	Series	Status	Varistor Voltage (Typ)	Surge Current	Max AC / DC Volts	Energy	Temperature Range	RoHS Compliance	Inventory
TMOV14R300E	Littelfuse	TMOV®	Obsolete	470 V	6 kA	300 V / 385 V	125 J	-55°C to 85°C	Non-compliant	788 Pcs
TMOV14RP300E	Littelfuse Inc.	TMOV®	Active	470 V	6 kA	300 V / 385 V	125 J	-55°C to 85°C	ROHS3 Compliant	16300 Pcs
TMOV14RP300EL2B7	Littelfuse Inc.	TMOV®	Active	470 V	6 kA	300 V / 385 V	125 J	-55°C to 85°C	ROHS3 Compliant	767 Pcs
V14E300P	Littelfuse Inc.	UltraMOV™	Active	470 V	6 kA	300 V / 385 V	125 J	-55°C to 85°C	ROHS3 Compliant	917 Pcs
V14E300PL4B7	Littelfuse Inc.	UltraMOV™	Active	470 V	6 kA	300 V / 385 V	125 J	-55°C to 85°C	ROHS3 Compliant	1149 Pcs
V14E300PX2855	Littelfuse Inc.	UltraMOV™	Active	470 V	6 kA	300 V / 385 V	125 J	-55°C to 85°C	ROHS3 Compliant	774 Pcs
V14P300P	Littelfuse Inc.	UltraMOV™	Active	470 V	6 kA	300 V / 385 V	125 J	-55°C to 85°C	ROHS3 Compliant	4700 Pcs

Engineering Selection Recommendations

Primary Recommendation: TMOV14RP300E

The TMOV14RP300E is the direct active-production equivalent within the same TMOV® series. It maintains identical electrical specifications and mechanical form factor while offering ROHS3 compliance and significantly higher inventory availability (16,300 units). This part is the preferred choice for direct replacement in existing designs.

Alternative Recommendations: UltraMOV™ Series (V14E300P, V14E300PL4B7, V14E300PX2855, V14P300P)

The UltraMOV™ series parts provide parametric equivalence with identical electrical performance and compliance certifications. These alternatives are suitable for applications where series designation is not a constraint. The V14P300P variant offers the highest inventory level (4,700 units) among the UltraMOV™ options.

All substitute parts are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements that the obsolete TMOV14R300E does not satisfy.

Frequently Asked Questions (FAQ)

Q: Can I use V14E300P as a direct replacement for TMOV14R300E?

A: Yes. The V14E300P maintains all critical electrical parameters (470 V typical varistor voltage, 6 kA surge current, 125 J energy, 300 V AC / 385 V DC maximum ratings) and identical mechanical form factor (14mm disc, through-hole mounting). The primary difference is the series designation (UltraMOV™ versus TMOV®) and improved regulatory compliance.

Q: What is the difference between TMOV14RP300E and TMOV14RP300EL2B7?

A: Both parts are electrically and mechanically identical. The suffix designation indicates different packaging or tape/reel configurations. Selection between these variants depends on procurement and assembly requirements rather than functional performance.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed (TMOV14RP300E, TMOV14RP300EL2B7, V14E300P, V14E300PL4B7, V14E300PX2855, V14P300P) are ROHS3 compliant. The original TMOV14R300E is RoHS non-compliant due to its obsolete status.

Q: Can I mix different substitute part numbers in the same assembly?

A: Yes. All substitute parts meet identical electrical and mechanical specifications. Mixing part numbers from different series (TMOV® and UltraMOV™) or different variants within a series does not affect functional performance in applications designed for the TMOV14R300E.

Q: Which substitute offers the best inventory availability?

A: TMOV14RP300E provides the highest inventory level at 16,300 units, followed by V14P300P at 4,700 units. Both are suitable for high-volume production requirements.

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