TMOV25SP385M Littelfuse Inc, TMOV25SP385M Datasheet - Page 23

• Manufacturer Part Number: TMOV25SP385M
• Description: TMOV VARISTOR PB FREE 25S
• Manufacturer: Littelfuse Inc
• Series: iTMOV®r

Specifications of TMOV25SP385M

• Varistor Voltage: 682V
• Current-surge: 20kA
• Number Of Circuits: 1
• Maximum Ac Volts: 385VAC
• Energy: 430J
• Package / Case: Disc 25mm 3-Lead
• Suppressor Type: Varistor
• Peak Surge Current @ 8/20µs: 20000A
• Varistor Case: 25mm DISC
• Clamping Voltage Vc Max: 1010V
• Peak Energy (10/1000us): 430J
• Voltage Rating Vdc: 682V
• Voltage Rating Vac: 385V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Maximum Dc Volts: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
©2009 Littelfuse, Inc.
Three Phase
If only 3 suppressor use 1-GND, 2-GND, 3-GND
For higher voltages use same connections, but
select varistors for the appropriate voltage rating.
If only 3 suppressor use 1-GND, 2-GND, 3-GND
FIGURE 25E. 3 PHASE 120V/208V, 4-WIRE
FIGURE 25C. 3 PHASE 220V, ONE PHASE
FIGURE 25B. 3 PHASE 220V OR 380V,
FIGURE 25A. 3 PHASE 220V/380V,
FIGURE 25F. 3 PHASE 240V/415V
FIGURE 25D. 3 PHASE 220V
240V
1
220V
220V
1
220V
220V
3
3
110V
3
GROUNDED
110V
3
UNGROUNDED
220V
LOWER VOLTAGE
UNGROUNDED
3
220V
3
220V
1
4
1
110V
1
1
4
240V
2
220V
220V
2
2
220V
2
220V
2
2
SUPPRESSOR
CONNECTION
SUPPRESSOR
CONNECTION
SUPPRESSOR
CONNECTION
SUPPRESSOR
CONNECTION
SUPPRESSOR
CONNECTION
SUPPRESSOR
CONNECTION
1 - 2
1 - 3
3 - 2
1 - GND
2 - GND
3 - GND
1 - 2
1 - 3
3 - 2
1 - GND
2 - GND
3 - GND
Varistor Products
1 - 2
2 - 3
1 - 3
1 - 4
2 - 4
3 - 4
1 - 2
2 - 3
3 - 1
1 - 3
1 - 2
2 - 4
3 - 4
Revision: November 5, 2009
19
DC applications require connection between plus and mi-
nus or plus and ground and minus and ground.
For example, if a transient towards ground exists on all
3 phases (common mode transients) only transient
suppressors connected phase to ground would absorb
energy. Transient suppressors connected phase to phase
would not be effective.
On the other hand if a differential mode of transient (phase
to phase) exists then transient suppressors connected
phase to phase would be the correct solution.
This is just a selection of some of the more important varia-
tions in connecting transient suppressors.
The logical approach is to connect the transient suppressor
between the points of the potential difference created by
the transient.The suppressor will then equalize or reduce
these potentials to lower and harmless levels.
DC Application
TRANSIENT
DIFFERENTIAL
COMMON
TRANSIENT
FIGURE 26A. INCORRECT
FIGURE 27A. INCORRECT
MODE
MODE
FIGURE 26. COMMON MODE TRANSIENT
FIGURE 27. DIFFERENTIAL MODE TRANSIENT
AND CORRECT SOLUTION
AND CORRECT SOLUTION
FIGURE 26B. CORRECT
FIGURE 27B. CORRECT