Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Metal Film
Fusing Resistors, ERQA, Z
– 68 –
Metal Film Fusing Resistors
Type: ERQA
ERQZ
(
0.25 W, 0.5 W, 1 W, 2 W coat ing type)
■Features
● Accurate fusing
● Small size and lightweight
● Uniform quality, consistent per for mance and reliability
● Flame retardant, utilizing exclusive silicon insulation material
● Reference Standard
EIAJ RC-2125
■Construction and Materials
Metal alloy fi lm
Spiraling turns
Ceramic core
End cap
Lead wire
Insulative lacquer
Marking
Sep. 201000
●RoHScompliant
Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Metal Film
Fusing Resistors, ERQA, Z
– 69 –
120
100
80
60
40
20
0
–60 –40 –20 0 20 40 60 80 100 120 140 160 180 200 220
Ambient temperature (˚C)
Rated load (%)
–30 ˚C 70 ˚C
150 ˚C
130 ˚C
ERQ14
ERQ12
ERQ1
ERQ2
E
1
R
2
Q
3 4
2
5
A
6
B
7
J
8
1
9
0
10
1
11
Product Code Power Rating at
70 °C amb.
14
12
0.25 W
0.5 W
Special Feature
A
Z
Standard
Less than 2
Resistance
Tolerance
J±5%
Resistance Value
The first two digits are
significant figures of
resistance and the third
one denotes number of
zeros following.Decimal
point is expressed by R as
2.2=2R2.
Suffix for Packaging and/or
Cut & Formed Leads
Nil
P
P···S
E
W···E
Std.bulk packing
P type cut & formed
P···S type cut & formed
Radial Taped & Box
Radial Taped & Box
12
Metal Film
Fusing Resistors
1
2
1W
2W AB
Z
Standard
Less than 2
The above example shows a standard Metal Film Fusing Resistors, 2 W pow er rat ing, resistance val ue of 100
, tolerance of ±5 %, and pack age of
stan dard bulk pack ing.
■Ratings
■Explanation of Part Numbers
Power Derating Curve
For resistors operated in ambient tem per a tures above
70 °C, power rating shall be derated in ac cor dance
with the fi gure on the right.
Type
Power
Rating
at 70°C
(W)
Maximum
Open
Circuit
Voltage(1)
(V)
Maximum
Overload
Voltage
Dielectric
With-
standing
Voltage
(V)
Resistance
Tol er ance
(%)
Resistance
Range ()T.C.R.
(10-6/°C)
Standard
Resistance
Values
Marking
Method
on Body
Mass
(Weight)
[g/pc.]
min. max.
ERQ14Z
0.25 200
3 times of
rated
voltage
(2)
AC 350 J (± 5) 1.0 1.8 ±350 E24 Color
code
0.24
(0.53 lbs.)
ERQ14A
2.0 470
ERQ12Z
0.5 250 AC 350 J (± 5) 1.0 1.8 ±350 E24 Stamp 0.32
(0.71 lbs.)
ERQ12A
2.0 560
Color code
ERQ1Z
1250 AC 600 J (± 5) 1.0 1.8 ±350 E24 Stamp 0.64
(1.41 lbs.)
ERQ1AB
2.0 560
ERQ2Z
2250 AC 1000 J (± 5) 1.0 1.8 ±350 E24 Stamp 1.54
(3.35 lbs.)
ERQ2AB
2.0 560
(1) Maximum Open Circuit Voltage: Referring to the maximum value of the voltage applied between terminals of the resistor when the resistor is opened
in an electric circuit 1000 times power rating or voltage specifi ed above whichever less is regarded as the maximum open circuit voltage.
(2) Rated Continuous Working Voltage (RCWV) shall be determined from RCWV=Power RatingResistance Value
Sep. 201000
Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Metal Film
Fusing Resistors, ERQA, Z
– 70 –
LφD
φd
ll
3 max.
S
L
φ0.65±0.05
φD
0.8
1.2±0.2
4.0±1.0
h
3.5 max.
S
L
φ0.80±0.05
φD
1.0
1.4±0.2
4.0±1.5
h
1st significant
figure
Multipier Resistance tolerance
White color
shows Fuse Resistor
2nd significant figure
Q
105
1W
100J
711
Q Shows Fuse Resistor Symbol Power rating
Manufacturing
Series No.
Date code
(Year, Month, Week)
Resistance value and tolerance
■Dimensions in mm (not to scale)
■Cut & Formed Type
■Explanation of Marking
ERQ첸첸AJ첸첸첸P
ERQ첸첸ZJ첸첸첸P
ERQ첸ABJP첸첸첸S
ERQ첸ZJP첸첸첸S
Type Dimensions (mm)
LφDkφd
ERQ14 6.3+1.5 2.3±0.5 30.0±3.0 0.65±0.05
ERQ12 9.0+1.5 2.8±0.5 30.0±3.0 0.65±0.05
ERQ1 12.0+1.5 4.0±1.0 30.0±3.0 0.80±0.05
ERQ2 15.0±1.5 5.5±1.0 38.0±3.0 0.80±0.05
–1.0
–1.0
–1.0
Part No.
Power Rating
at 70 °C
(W)
Standard
Q’ty/Packing
(pcs.)
Dimensions (mm)
LφDS h
ERQ14첸J첸첸첸P0.25 2000 6.3+1.5 2.3±0.5 10.0±1.5 4.0±1.5
ERQ12첸J첸첸첸P0.5 2000 9.0+1.5 2.8±0.5 12.5±1.5 4.0±1.5
–1.0
–1.0
Part No.
Power Rating
at 70 °C
(W)
Standard
Q’ty/Packing
(pcs.)
Dimensions (mm)
LφDS h
ERQ1첸첸JP첸첸첸S1 1000 12.0+1.5 4.0±1.0 15.0±1.5 6.0±1.5
ERQ2첸첸JP첸첸첸S2 1000 15.0±1.5 5.5±1.0 20.0±2.0 6.5±1.5
–1.0
Type 14, 12 Type 1, 2
Sep. 201000
Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Metal Film
Fusing Resistors, ERQA, Z
– 71 –
P0φD0
φd
W
H1
P1
F
PP
2
D
A
Insulated
Lead
W1
H0
a
b
c
Marking
P1P
AB
FP2
H1
H0
W1
W
φd
φD
P0φD0
■For Panasert Au to mat ic Insertion Machine Radial Tape & Box
Type ERQ첸첸AJ첸첸첸E
ERQ첸첸ZJ첸첸첸E
(14A/14Z, 12A/12Z, 1AB/1Z)
● Radial Tape Packaging Methods
■For Panasert Au to mat ic Insertion Machine Radial Taped & Box
Type ERQ첸첸A/ZJW첸첸첸E (14A/14Z, 12A/12Z, 1AB/1Z)
Dimensions (mm) Dimensions (mm) Dimensions (mm) Dimensions (mm) Dimensions (mm)
P 12.7±1.0 W 18.0±0.5
H1
14A/14Z 12 max.
A
14A/14Z 6.35+0.65
D
14A/14Z 2.3±0.5
P012.7±0.3 W19.0±0.5 12A/12Z 15.5 max. 12A/12Z 9.0+1.5 12A/12Z 2.8±0.5
P13.85±0.70 1AB/1Z 19 max. 1AB/1Z 12.0+1.5 1AB/1Z 4.0±1.0
P26.35±1.00 H016.0±0.5 φd 0.65±0.05
F 5.0±0.8 φD04.0±0.2
–0.35
–1.0
–1.0
Part Number Dimensions (mm) Standard Quantity
(pcs./box)
abc
ERQ14AJ첸첸첸E
ERQ14ZJ첸첸첸E46 130 335 2000
pcs./box
ERQ12AJ첸첸첸E
ERQ12ZJ첸첸첸E46 130 335 2000
pcs./box
ERQ1ABJ첸첸첸E
ERQ1ZJ첸첸첸E49 100 335 1000
pcs./box
Dimensions (mm) Dimensions (mm)
P14A/14Z 12.7±1.0
H1
14A/14Z 6.5+0.6
12A/12Z, 1AB/1Z
30.0±1.0 12A/12Z 6.5+1.0
P0
14A/14Z 12.7±0.3 1AB/1Z 6.5+1.0
12A/12Z, 1AB/1Z
15.0±0.3 φD04.0±0.2
P1
14A/14Z 6.35±1.00
A
14A/14Z 6.35+0.65
12A/12Z, 1AB/1Z
7.5±1.0 12A/12Z 9.0+1.5
P2
14A/14Z 3.85±0.70 1AB/1Z 12.0+1.5
12A/12Z, 1AB/1Z
3.75±0.50
B
14A/14Z 11.2 max.
F14A/14Z 5.0+0.6 12A/12Z 14 max.
12A/12Z, 1AB/1Z
7.5+0.6 1AB/1Z 17 max.
W 18.0±0.5
φD
14A/14Z 2.3+0.5
W19.0±0.5 12A/12Z 2.8±0.5
H0
14A/14Z 16.0±0.5 1AB/1Z 4.0±1.0
12A/12Z 18.0±1.0
φd14A/14Z 0.65±0.05
1AB/1Z 18.0±1.0
12A/12Z, 1AB/1Z
0.80±0.05
– 0
–0.35
–1.0
–1.0
–0.3
–0.2
–0.2
– 0
– 0
Sep. 201000
Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Metal Film
Fusing Resistors, ERQA, Z
– 72 –
Characteristics Specifi cations Test Methods
Fusing
Characteristics
Rated
Power
Res. Value
()Limit
0.25 W
0.5 W
1 to 1.8
Open within
30 seconds
at 30 times
the rated
power
1 W
2 W
Open within
30 seconds
at 25 times
the rated
power
0.25 W
0.5 W
1 W
2 W
2 to 9.1
Open within
30 seconds
at 16 times
the rated
power
0.25 W 10 to 470 Open within
30 seconds
at 12 times
the rated
power
0.5 W
1 W
2 W
10 to 560
The test potential shall be preadjusted using a dummy
re sis tor and then be subjected to the test specimens.
The potential shall be readjusted within two seconds to
reach the exact value of specifi ed current. This test
shall be made under the conditions at 20 °C and 65 %
RH (or at a temperature of 5 °C to 35 °C and 45 to
85 % RH, only when any doubt may not be caused),
and the use of sta bi lized pow er source is sug gest ed.
Fus ing time shall be mea sured as the duration un til the
circuit cur rent is de creased to a 1/50 the initial test
current or less.
■Performance Spec i fi ca tions
Sep. 201000
Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Metal Film
Fusing Resistors, ERQA, Z
– 73 –
Measuring point
600
500
400
300
200
100
0
0123456789101112
14A
12A
1AB
2AB
Multiple of the power rating
Temperature rise 왕T (K)
2.0 to 9.1 ()
10 to 560 ()
ERQ12A
200
100
50
30
10
5
1079121620 25 30
Fusing time (s)
Multiple of the power rating
2.0 to 9.1 ()
10 to 470 ()
ERQ14A
200
100
50
30
10
5
10791216202530
Multiple of the power rating
Fusing time (s)
2.0 to 9.1 ()
10 to 560 ()
ERQ1AB
200
100
50
30
10
5
10791216202530
Multiple of the power rating
Fusing time (s)
2.0 to 9.1 ()
10 to 560 ()
ERQ2AB
200
100
50
30
10
5
10791216202530
Multiple of the power rating
Fusing time (s)
■Fusing Characteristics (Constant Voltage Cir cuit)
This data is for reference only, specifi cations should be verifi ed in written form with the engineering division.
■ Hot Spot Temperature (for reference)
Sep. 201000
Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Metal Film
Fusing Resistors, ERQA, Z
– 74 –
T
Pp (Vp)
τ
Safety Precautions
PP : Pulse limit power (W)
VP : Pulse limit voltage (V)
τ : Pulse continuous time (s)
T : Period (s)
VR : Rated voltage (V)
P : Rated power (W)
R : Resistance value ()
Vp max. : Max. pulse limit voltage (V)
Type K Vp max. (V)
ERQ14A 0.6 200
ERQ12A 0.6 250
ERQ1AB 0.6 250
ERQ2AB 0.4 250
Withstand pulse limit power is calculated by the next
meth od.
PP= K · P · T/τ
VP= K · P · R · T/τ
Reference to the right about a fi xed number of VP max.
●T>1(s) 촞 T=1(s)
●T/τ>100 촞 T/τ=100
●PP<P 촞 P stands for PP
(VP<VR 촞 VR stands for VP)
●Added voltage<Vp max.
●PP or VP is reference value
Conditions : Pulse added time=1000 h, Resistance change=±5 %
Room temperature
(Data for Reference)
■Pulse Char ac ter is tics (Usual)
The following are precautions for individual products. Please also refer to the common precautions shown on page 4
of this catalog.
1. Checking the fusing conditions
1) Fusing characteristics differ depending on the type, shape, and resistance. Check the fusing conditions be fore
selecting the type of Metal Film Fusing Re sis tors (hereafter called the fusing resistor) to be used.
2) Use the fusing resistors under the maximum open circuit voltage. Otherwise, arc ing may oc cur when a volt age
much higher than the rated one is applied in the event of an abnormality in the circuit, or when a high volt age
is applied after fus ing.
3) Under abnormal conditions of a constant voltage circuit, a current of about 2 or 3 times the initial abnormal
current passes through, accelerating the speed at which the fusing resistors blows. When using a constant
current circuit, carefully check the conditions because the fusing resistors may not blow in a constant cur rent
circuit.
2. Checking for pulse voltage, impact voltage, and transient voltage
Make sure to evaluate and check the fusing resistors mounted on your product if they are to be mounted on a
circuit that generates an impact voltage, or if there is a possibility that the tran sient phenomenon (sig nifi cant ly
high voltage applied in a short time) may oc cur or that a pulse voltage with a high peak volt age may be ap plied.
Make sure to consult our sales staff before using the fusing resistors under spe cial con di tions.
3. Conditions of use in a steady state
Make sure that the load conditions have a suffi cient allowance for the power de r at ing curve. The char ac ter is tics of
the fusing resistors are set by using a constant voltage circuit.
4. The solvent resistance of the fusing resistors is not assured. If you use a solvent for clean ing after soldering or
other processes, make sure to consult our sales staff before use and per form a prior test and evaluation to
ensure that the solvent will not affect the re li abil i ty of the fusing resistors.
Sep. 201000