HEL K Type Metal Oxide Varistor 7D471K 7mm 470V 1200A 31J 90pF For Energy Saving Lamp
Features Of The Metal Oxide Varistor 7D471K
◆ Small size, large flow capacity and energy tolerance
◆ Epoxy resin insulation encapsulation
◆ Response time: <25ns
◆ Ambient temperature: -40℃～+85℃
◆ Insulation resistance: ≥500MΩ
◆ Varistor voltage temperature coefficient: -0.5%/℃
◆ Chip diameter: 5, 7, 10, 14, 20, 25, 32, 40mm
◆ The allowable deviation of the varistor voltage is: K±10%
Function Of The Metal Oxide Varistor 7D471K
①Overvoltage protection of transistors, ICs, thyristors and semiconductor switching elements and various electronic and electrical equipment
②Surge absorption and overvoltage protection of household appliances
③Industrial electrical surge absorption
④Electrostatic discharge and noise signal cancellation
⑤Surge absorption of relays and solenoid valves
⑥Overvoltage protection of leakage switch
⑦Lightning protection and overvoltage protection of telephone program-controlled switches and communication equipment
Dimension Of The Metal Oxide Varistor 7D471K (mm)
| Series | Varistor Voltage | Tmax |
| 7D | 18V ~ 39V | 3.9 |
| 47V ~ 68V | 4.4 |
| 82V ~ 150V | 3.9 |
| 180V ~ 270V | 4.3 |
| 330V ~ 390V | 4.9 |
| 430V ~ 560V | 5.7 |
| 620V ~ 780V | 6.5 |
| 820V | 6.8 |
Note: If the foot type is non-linear such as outward bending, usually Hmax=14mm
Electrical Parameters Of The Metal Oxide Varistor 7D471K
| P/N | V1mA | AC | DC | V10A | Imax | In(15times) | (W) | (10/1000μs)(J) | 1kHz |
| (V) | (V) | (V) | (V) | (8/20μs) | (8/20μs) | (PF) |
| (A) | (A) |
| HEL 7D180K | 18(16～20) | 11 | 14 | ·38 | 250 | — | 0.02 | 1.3 | 3500 |
| HEL 7D220K | 22(20～24) | 14 | 18 | ·43 | 250 | — | 0.02 | 1.7 | 2800 |
| HEL 7D270K | 27(24～30) | 17 | 22 | ·53 | 250 | — | 0.02 | 2 | 2200 |
| HEL 7D330K | 33(30～36) | 20 | 26 | ·65 | 250 | — | 0.02 | 2.4 | 1800 |
| HEL 7D390K | 39(35～43) | 25 | 31 | ·77 | 250 | — | 0.02 | 2.8 | 1450 |
| HEL 7D470K | 47(42～52) | 30 | 38 | ·93 | 250 | — | 0.02 | 3.5 | 1150 |
| HEL 7D560K | 56(50～62) | 35 | 45 | ·110 | 250 | — | 0.02 | 4.1 | 1050 |
| HEL 7D680K | 68(61～75) | 40 | 56 | ·135 | 250 | — | 0.02 | 5 | 970 |
| HEL 7D820K | 82(74～90) | 50 | 65 | 135 | 1200 | 500 | 0.25 | 6 | 930 |
| HEL 7D101K | 100(90～110) | 60 | 85 | 165 | 1200 | 500 | 0.25 | 7.4 | 860 |
| HEL 7D121K | 120(108～132) | 75 | 100 | 200 | 1200 | 500 | 0.25 | 8 | 670 |
| HEL 7D151K | 150(135～165) | 95 | 125 | 250 | 1200 | 500 | 0.25 | 10 | 490 |
| HEL 7D181K | 180(162～198) | 115 | 150 | 300 | 1200 | 500 | 0.25 | 12 | 330 |
| HEL 7D201K | 200(180～220) | 130 | 170 | 340 | 1200 | 500 | 0.25 | 14 | 240 |
| HEL 7D221K | 220(198～242) | 140 | 180 | 360 | 1200 | 500 | 0.25 | 15 | 190 |
| HEL 7D241K | 240(216～264) | 150 | 200 | 395 | 1200 | 500 | 0.25 | 16 | 165 |
| HEL 7D271K | 270(243～297) | 175 | 225 | 455 | 1200 | 500 | 0.25 | 19 | 150 |
| HEL 7D301K | 300(270～330) | 195 | 250 | 505 | 1200 | 500 | 0.25 | 22.1 | 135 |
| HEL 7D331K | 330(297～363) | 210 | 275 | 550 | 1200 | 500 | 0.25 | 24.2 | 130 |
| HEL 7D361K | 360(324～396) | 230 | 300 | 595 | 1200 | 500 | 0.25 | 26 | 125 |
| HEL 7D391K | 390(351～429) | 250 | 320 | 650 | 1200 | 500 | 0.25 | 26 | 105 |
| HEL 7D431K | 430(387～473) | 275 | 350 | 710 | 1200 | 500 | 0.25 | 29 | 100 |
| HEL 7D471K | 470(423～517) | 300 | 385 | 775 | 1200 | 500 | 0.25 | 31 | 90 |
| HEL 7D511K | 510(459～561) | 320 | 418 | 842 | 1200 | 500 | 0.25 | 34 | 80 |
| HEL 7D561K | 560(504～616) | 350 | 460 | 920 | 1200 | 500 | 0.25 | 34 | 75 |
| HEL 7D621K | 620(558～682) | 385 | 505 | 1025 | 1200 | 500 | 0.25 | 36 | 70 |
| HEL 7D681K | 680(612～748) | 420 | 560 | 1120 | 1200 | 500 | 0.25 | 36 | 65 |
| HEL 7D751K | 750(675～825) | 460 | 615 | 1240 | 1200 | 500 | 0.25 | 39 | 61 |
| HEL 7D781K | 780(702～858) | 485 | 640 | 1290 | 1200 | 500 | 0.25 | 41 | 54 |
| HEL 7D821K | 820(738～902) | 510 | 670 | 1355 | 1200 | 500 | 0.25 | 43 | 48 |
Inrush current impulse level Of The Metal Oxide Varistor 7D471K
| Product Level | K Coventional Version | KJ Enhanced Version | KH Super Enhanced Version | KX Custom made Version |
| Part No. | V1mA(V) | Withstanding
Surge
Current
(Imax)
(A) | Impulse
Current
15 times
8/20μs
(A) | Withstanding
Surge
Current
(Imax)
(A) | Impulse
Current
15 times
8/20μs
(A) | Withstanding
Surge
Current
(Imax)
(A) | Impulse
Voltage
40 times
(1.2/50μs)
(V) | Super High Energy |
| 5D | 82～750 | 400 | 150 | 800 | 250 | 800 | 1000 | Example 1
14D instead of 20D Example 2 HEL14D561KX reach 6KV/3KA 100 times |
| 7D | 82～820 | 1200 | 500 | 1750 | 1000 | 1750 | 2000 |
| 10D | 82～1800 | 2500 | 1500 | 3500 | 1500 | 3500 | 4000 |
| 14D | 82～1800 | 4500 | 3000 | 6000 | 3000 | 6000 | 6000 |
| 20D | 82～1800 | 6500 | 3000 | 10000 | 5000 | 10000 | 10000 |
| 5D | 18～68 | 100 | - | 250 | 150 | - | - |
| 7D | 18～68 | 250 | - | 500 | 250 | - | - |
| 10D | 18～68 | 500 | - | 1000 | 500 | - | - |
| 14D | 18～68 | 1000 | - | 2000 | 1000 | - | - |
| 20 | 18～68 | 2000 | - | 3000 | 1000 | - | - |
| In accordance with International and National Standards | IEC61051-1 GB/T10193
IEC61051-2 GB/T10194
IEC61051-2-2 GB/T10195
CSA-C22.2
UL1449 | Include the
left column, and add the following:
IEC60950-1:2005/Annex Q
GB4943.1-2011 GB8898-2011
UL1449 | Include the
left column, and add the following:
IEC61000-4-5 GB/T17626.5
IEC61643-331 GB/T18802.331 |
Remark: the Impluse voltage testing standards(1.2/50μs) with 40 times are only applicable to the products
which with the varistor voltage more than 430V.
Safety certification and corresponding models Of The Metal Oxide Varistor 7D471K
| Voltage | 5D | 7D | 10D | 14D | 20D |
| 180 | UL | UL | UL | UL | UL |
| 220 |
| 270 |
| 330 |
| 390 |
| 470 |
| 560 |
| 680 |
| 820 | CQC UL VDE CSA | CQC UL VDE CSA | CQC UL VDE CSA | CQC UL VDE CSA | CQC UL VDE CSA |
| 101 |
| 121 |
| 151 |
| 181 |
| 201 | CQC UL VDE CSA | CQC UL VDE CSA | CQC UL VDE CSA Q2 | CQC UL VDE CSA Q2 | CQC UL VDE CSA Q2 |
| 221 |
| 241 |
| 271 |
| 301 |
| 331 |
| 361 |
| 391 |
| 431 | CQC UL VDE CSA | CQC UL VDE CSA | CQC UL VDE CSA Q1 Q2 | CQC UL VDE CSA Q1 Q2 | CQC UL VDE CSA Q1 Q2 |
| 471 |
| 511 | CQC UL VDE |
| 561 | VDE |
| 621 | VDE |
| 751 | / | CQC UL VDE |
| 781 |
| 821 |
| 911 | / | / |
| 951 |
| 102 |
| 112 |
| 152 | / | / | CQC VDE CSA Q1 Q2 | CQC VDE CSA Q1 Q2 | CQC VDE CSA Q1 Q2 |
| 182 | / | / | VDE CSA Q2 | VDE CSA Q2 | VDE CSA Q1 Q2 |
Remark:
CQC (GB/T10193, GB/T10194).
UL1449(VZCA2/UL,VZCA8/C-UL), 105℃, 125℃, 130℃.
VDE (IEC61051-1, -2, -2-2).
CSA (C22.2 No.269.5-17).
Q1 = CQC (GB4943.1, GB8898).
Q2 = VDE (IEC60950-1 Annex.Q).
The above certification specifications may be changed, if necessary, please ask the quality control
department for the latest version.
Derating curve graph and volt-ampere characteristic graph
Maximum surge current imax = f(tr,pulse train)
v/i characteristics
A=Leakage current, B = Protection level for worst-case varistor tolerances
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