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							Zenamic Z25M / Z33M
								
								Zenamic is Semitec’s registered trademark for 
								metal oxide varistors which are transient 
								voltage surge absorbers. Zenamic features large 
								surge current and transient overvoltage handling 
								capabilities. It is produced by sintering a ZnO 
								based metal oxide mix at temperatures ranging 
								from 1200 to 1400℃.   
								
								
									
									Applications
									- Semiconductor device protection: Diodes, 
									transistors, thyristors, IC etc.- Home electronics protection: TVs, air 
									conditioners, refrigerators, microwave 
									ovens, etc.
 - Office automation equipment protection: 
									PPC copiers, fax machines, PCs, etc.
 - Industrial equipment protection: Robots, 
									water heaters, machining equipment, etc.
 - Inrush surge protection: Electromagnetic 
									clutches/brakes, relay control devices, 
									circuit breakers etc.
 - Others: Automotive electronics circuits, 
									vending machines, communication/broadcasting 
									equipment, etc.
 
									
									Rating
										
										Z25M221S~102S
											
												| Part No. | Varistor voltage V1mA | Maximum allowable voltage | Clamping voltage (max.) V150A | Rated power | Maximum energy (2ms) | Maximum peak current (8/20μs) | Capacitance (TYP) (1kHz) |  
												| AC | DC |  
												| V | Vrms | V | V | W | J | A | pF |  
												| Z25M221S | 187.0~253.0 | 120 | 165 | 380 | 1.0 | 125 | 10,000 | 3,300 |  
												| Z25M271S | 229.5~310.5 | 150 | 210 | 465 | 155 | 2,200 |  
												| Z25M331S | 280.5~379.5 | 175 | 245 | 570 | 185 | 1,900 |  
												| Z25M391S | 331.5~448.5 | 210 | 295 | 675 | 215 | 1,700 |  
												| Z25M441S | 374.0~506.0 | 240 | 335 | 760 | 225 | 1,500 |  
												| Z25M471S | 399.5~540.5 | 250 | 350 | 810 | 235 | 1,500 |  
												| Z25M561S | 476.0~644.0 | 300 | 420 | 970 | 260 | 1,400 |  
												| Z25M681S | 578.0~782.0 | 365 | 510 | 1,175 | 280 | 1,250 |  
												| Z25M821S | 697.0~943.0 | 440 | 615 | 1,415 | 330 | 800 |  
												| Z25M102S | 850.0~1,150.0 | 520 | 730 | 1,725 | 375 | 500 |  
										Z33M221S~102S
											
												| Part No. | Varistor voltage V0.1mA | Maximum allowable voltage | Clamping voltage (max.) V200A | Rated power | Maximum energy (2ms) | Maximum peak current (8/20μs) | Capacitance (TYP) (1kHz) |  
												| AC | DC |  
												| V | Vrms | V | V | W | J | A | pF |  
												| Z33M221S | 187.0~253.0 | 120 | 165 | 380 | 1.2 | 200 | 20,000 | 5,500 |  
												| Z33M271S | 229.5~310.5 | 150 | 210 | 465 | 255 | 4,200 |  
												| Z33M331S | 280.5~379.5 | 175 | 245 | 570 | 310 | 3,700 |  
												| Z33M391S | 331.5~448.5 | 210 | 295 | 675 | 360 | 3,200 |  
												| Z33M441S | 374.0~506.0 | 240 | 335 | 760 | 370 | 2,800 |  
												| Z33M471S | 399.5~540.5 | 250 | 350 | 810 | 385 | 2,600 |  
												| Z33M561S | 476.0~644.0 | 300 | 420 | 970 | 425 | 2,200 |  
												| Z33M681S | 578.0~782.0 | 365 | 510 | 1,175 | 460 | 1,800 |  
												| Z33M821S | 697.0~943.0 | 440 | 615 | 1,415 | 580 | 1,500 |  
												| Z33M102S | 850.0~1,150.0 | 520 | 730 | 1,725 | 620 | 1,000 |  |  |