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6

AS Series

Anti-surge Thick Film Chip Resistors

Fe A ture S

•Smallsizeandlightweight

•Suitableforbothwaveandreflowsoldering

•Canwithstandhighsurge

•Reductionofassemblycosts

Serie S S peci F ic Ation S

c h A r A cteri S tic S

Power

Max

Max

Dielectric

Rating

Working

Overload

Withstanding

Resistance

Type

at 70°C

Voltage

Voltage

Voltage

Range

AS08 (0805)

0.33W

150V

300V

500V

1Ω~10MΩ

AS12 (1206)

0.5W

200V

400V

500V

1Ω~10MΩ

AS25 (2512)

1.5W

500V

500V

500V

1Ω~20MΩ

Std. Oper. Temp. -55°C ~ +155°C

Standard Values E-24 values

Construction Thick film

Terminal material Silver, copper, nickel,

and tin, non-SAC alloy

Solderable finish Matte tin

Tolerance ±5% standard; ±10%

and ±20% available

Derating

Reflow

100

Ambient Temperature, °C

60

20

0

80

40

050

100

155

70

-55

300

Time

Preheating

150° ~ 180°

90 ±30sec.

Soldering

Cooling

200

50

0

250

100

150

230° ~ 245°/250°

20 ±10sec.

Test

ΔR

Test Methods (JIS C 5201-1 )

Temperature

Coefficient

1Ω-10Ω: ≤ ±400PPM/°C

(±200 PPM can be provid-

ed on a case to case basis)

11Ω-10MΩ: ≤ ±100PPM/°C

Natural ΔR/°C

R1(t2-t1)

R1: at room temp. (T1)

R2: at room temp. plus 100°C (T2)

Test pattern: room temp. (T1), room

temp. +100°C(T2)

Short Time

Overload

±(1.0% + 0.1Ω) max.

Permanent ΔR after the application of a

potential of 2.5 times RCWV for 5 sec.

Terminal

Bending

±(1.0% + 0.05Ω) max.

Twist of Test Board: Y/X = 3/90 mm for

60 sec.

Soldering Heat ±(1.0% + 0.05Ω) max.

260°C±3°C for 10 ±1 sec.

Single Pulse ±(1.0% + 0.1Ω) max.

See graph on next page.

Humidity ±(3.0% + 0.1Ω) max.

Temporary ΔR after 240 hr. at 40 ±2°C

and 90-95% relative humidity

Load Life in

Humidity

±(3.0% + 0.1Ω) max.

ΔR after 1,000 hr. (1.5 hr. "on", 0.5 hr.

"off" ) at RCWV at 40 ±2°C and 90-95%

relative humidity

Load Life ±(3.0% + 0.1Ω) max.

ΔR change after 1,000 hr. operat-

ing at RCWV, with duty cycle of (1.5

hours"on", 0.5 hour"off") at 70°C ±2°C

ambient

Solderability Min. 95% coverage

Wave Solder: 245°C ±3°C for 2-3 sec.

Temperature

Cycling

±(1.0% + 0.05Ω) max.

ΔR after 5 cycles:

-55°C ±3°C 30 min.

Room temp. 10-15 min.

+155°C ±2°C 30 min.

4 Room temp. 10-15 min.

Dielectric

withstanding

voltage

No evidence of flashover,

mechanical damage, arcing

or insulation breakdown

Clamped in the trough of a 90°C metal-

lic v-block at specified AC potential

60-70 sec.