Reliability Test for Wound Chip

Electrical Performance Test

ITEM

SPECIFCATION

TEST CONDITION/TEST METHOD

INDUCTANCE

 REFER TO STANDARD ELECTRICAL CHARACTERISTIC LIST Q-METER: HP4342A

Q

SELF RESONANT
FREQUENCY(SRF)

 IMPEDANCE ANALYZER: HP4192A,HP4286A

DC RESISTANCE
( RDC )

 WHEATSTONE BRIDGE: YEW-2755 DIGITAL MULTIMETER: HP3478A

RATED CURRENT
IDC

 APPLIED THE CURRENT TO COILS,THE INDUCTANCE CHANGE SHALL BE LESS THAN 10% TO INITIAL VALUE AND TEMPERATURE RISE SHALL NOT BE MORE THAN 20°C.

TEMPERATURE
RISE TEST

 20°C MAX . 1. APPLIED THE ALLOWED DC CURRENT FOR 10 MINUTES.
2. TEMPERATURE MEASURE BY DIGITAL SURFACE THERMOMETER.

OVER LOAD TEST

 AFTER TEST, INDUCTOR
SHALL BE NO EVIDENCE OF
ELECTRICAL AND
MECHANICAL DAMAGE.		 APPLIED 2 TIMES OF RATED ALLOWED DC CURRENT TO INDUCTOR FOR A PERIOD OF 5 MINUTES.

WITHSTANDING
VOLTAGE TEST

 AFTER TEST, INDUCTOR
SHALL BE NO EVIDENCE OF
ELECTRICAL AND
MECHANICAL DAMAGE.		 AC VOLTAGE OF 1000VAC APPLIED BETWEEN INDUCTOR TERMINALS AND CASE FOR 1 MINUTE.

INSULATION
RESISTANCE TEST

 100M MIN. 100VDC APPLIED BETWEEN INDUCTOR TERMINAL AND CASE.

 

Mechanical Performance Test

ITEM

SPECIFCATION

TEST CONDITION/TEST METHOD
VIBRATION TEST
(LOW FREQUENCY)		  

1. INDUCTOR SHALL BE NO
EVIDENCE OF ELECTRICAL
AND MECHANICSL DAMAGE.

2. INDUCTANCE SHALL NOT
CHANGE MORE THEN 10% .

3. Q SHALL NOT CHANGE
MORE THAN 30% .

 1. AMPLITUDE: 1.5mm
2. FREQUENCY: 10-55-10Hz/MIN.
3. DIRECTION: X, Y, Z
4. DURATION: 2HRS / X, Y, Z
SHOCK TEST INDUCTORS SHALL BE DROPPED 10 TIMES FROM A HEIGHT OF 1m ONTO 3cm WOODEN BOARD

RESISTANCE TO
SOLDERING HEAT

 TEMP: 260 5°C
TIME: 10 1.0 SEC.
TERMINAL STRENGTH-PULL TEST TERMINAL SHALL NOT BE LOOSENED OR RUPTURED. At 1 KG LOAD SHALL BE APPLIED TO BOTH TERMINALS IN THE AXIS DIRECTION FOR 1 MINUTE.
SOLDERABILITY TEST THE TERMINAL SHALL BE AT LEAST 90 % COVERED WITH SOLDER. AFTER FLUXING,INDUCTOR SHALL BE DIPPED IN A MOLTEN SOLDER BATH AT 230 5°C FOR 5 SECONDS.
RESISTANCE TO SOLVENT TEST THERE SHALL BE NO CASE DEFORMATION CHANGE IN APPEARANCE OR OBLITERATION OF MARKING. MIL-STD-202F, METHOD 215D.

 

Climatic Test

ITEM

SPECIFCATION

TEST CONDITION / TEST METHOD
TEMPERTURE CHARACTERISTIC 1. INDUCTOR SHALL BE NO EVIDENCE OF ELECTRICAL AND MECHANICAL DAMAGE.

2. INDUCTANCE SHALL NOT CHANGE MORE THAN 10%.

3. Q SHALL NOT CHANGE MORE THEN 30%.

-25°C TO 85°C
COLD TEST 1. TEMP: 40 2°C
2. RH: 90 - 95%
3. TIME: 96 2 HOURS
THERMAL SHOCK
TEST		 1. TEMP : -25 2°C
2. TIME : 16HOURS
ROOM TEMP:  -25 2°C
15MINS             30MINS

ROOM TEMP:  85 2°C
15MINS             30MINS

TOTAL: 5CYCLES
DRY HEAT TEST 1. TEMP: 85 2°C
2. TIME: 16HOURS

HIGH
TEMPERATURE LOAD LIFE TEST

 THERE SHALL BE NO EVIDENCE OF SHORT OR OPEN CIRCUITING. 1. TEMP: 85 2°C
2. TIME: 1000 12 HOURS
3. LOAD: ALLOWED DC CURRENT

HUMIDITY LOAD TEST

 1.TEMP: 40 2°C
2.RH: 90 - 95%
3.TIME: 1000 12 HOURS
4.LOAD: ALLOWED DC CURRENT

*NOTE:
UNLESS OTHERWISE SPECIFIED, ALLOW THE SPECIMEN TO STAND AT ROOM TEMPERATURE FOR 1 HOUR OR   MORE BUT NOT MORE THAN 2 HOURS, MEASURE THE ELECTRICAL AND MECHANICAL PERFORMANCES.