AOA0000C76

Wirewound Resistors,
Flameproof, Bath-tub Type
Wirewound Resistors,
Flameproof, Bath-tub Type
Type:
ERF
Discontinued
Axial leads type
ERFA
Radial insertion type
ERFT(L)
Off PC board type
ERFZX
ERFZY
ERFZ
■ Features
●
●
●
●
●
Flameproof
Exclusive surge characteristics
Uniform quality
Reference standards to IEC 60115-4, EIAJ RC-2123A
RoHS compliant
■ Explanation of Part Numbers
1
2
3
4
5
6
7
8
9
10
11
&
3
'
;
:
,
3
Product Code
Fixed
Wirewound
Resistor
Bath-tub
Power Rating
Code Rated power
2
2W
3
3W
5
5W
7
7W
10
10 W
5
7
10
15
20
Style of Terminal with Fixture
Style
Code
Axial leads
A
T (L) Radial insertion (Low resistance)
Short terminal
ZX
Long terminal
ZY
Long terminal (Dual nail)
Z
5W
7W
10 W
15 W
20 W
Resistance
Tolerance
Code
Tol.
J
±5 %
K
±10 %
Standard
Resistance
Tolerance
10 ? : J
<10 ?: K
12
Suffix for
Special
Features
or Packing
Code
Nil.
Std.
Packing
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 4.7 = 4R7
■ Construction
Flameproo ceramic
case
Flame proof & Insulation cement
Marking
Automatically clamped
termination and lead welding
Resistance wire
Nickel-Chromium or
Copper-Nickel alloy
resistance wire
Lead wire
Fiber-Glass core
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
01 Aug. 2012
61
Wirewound Resistors,
Flameproof, Bath-tub Type
Discontinued
Power
Rating
at 70 °C
(W)
Type
Power Derating Curve
For resistors operated in ambient temperatures above
70 °C, power rating shall be derated in accordance
with the figure below.
Dielectric
Withstanding Standard
Quantity
Voltage
(pcs.)
(VAC)
Resistance Range (Ω)
min.
max.
ERF2A
2
0.1
390
1000
1000
ERF3A
3
0.18
680
1000
1000
ERF5A
5
0.18
680
1000
1000
ERF7A
7
0.22
1.5 k
1000
500
ERF10A
10
0.33
2.4 k
1000
500
120
Rated Load (%)
ERFA (Axial Lead Type)
■ Ratings
100
–55 °C
70 °C
80
60
40
275 °C
20
0
–60 –40 –20 0
155 °C max.
20 40 60 80 100 120 140 160 180 200 220 240 260
Ambient Temperature (°C)
■ Dimensions in mm (not to scale)
W±1.0
H±1.0
d±0.1
Mass (Weight)
[g/pc.]
ERF2A
18.0±1.0
6.4
6.4
0.8
2
ERF3A
22.0±1.0
8.0
8.0
0.8
4
ERF5A
22.0±1.0
9.5
9.0
0.8
5
ERF7A
35.0±1.5
9.5
9.0
0.8
8
ERF10A
48.0±2.0
9.5
9.0
0.8
12
fd
H
35.0±3.0
Dimensions (mm)
L
Type
(Marking)
L
35.0±3.0
Lead Forming
W
W
Recommended
PWB hole
Type
L±1
ERF2A...P
18
6.4
6.4
25
1.4
f1.00±0.05
ERF3A...H
22
8.0
8.0
27.5
1.4
ERF5A...H
22
9.0
9.5
27.5
1.4
10
W±1.0 H±1.0
W±0.2 h1±2
P±2
h2±1
h3±1
6
4
13.2
10
4
18
4
18.75
h3
L
h2 h1
H
P
f0.8±0.1
3.0 max.
W
Power Derating Curve
Radial Inser tion Type
■ Ratings
Resistance Range (Ω)
min.
max.
120
Dielectric
Withstanding Standard
Quantity
Voltage
(pcs.)
(VAC)
ERF2T(L)
2
(0.01) 0.1
(0.082) 390
1000
500
ERF3T(L)
3
(0.01) 0.18
(0.082) 680
1000
500
ERF5T(L)
5
(0.01) 0.18
(0.082) 680
1000
500
ERF7T(L)
7
(0.01) 0.22
(0.1) 1.5 k
1000
500
ERF10T(L)
10
(0.01) 0.33
(0.1) 2 k
1000
500
Rated Load (%)
Type
Power
Rating
at 70 °C
(W)
100
–55 °C
70 °C
80
60
40
275 °C
20
0
–60 –40 –20 0
155 °C max.
20 40 60 80 100 120 140 160 180 200 220 240 260
Ambient Temperature (°C)
● TL (2TL to 10TL) are series of low resistance value.
■ Dimensions in mm (not to scale)
D
Type
L
H
W
0d
Dimensions (mm)
W
D
H
L
P
0d
Mass (Weight)
[g/pc.]
ERF2T(L) 11.0±1.0 7.0±1.0 20.5±1.5
4.5 –1.0
+2.0
5.0 –1.0
+2.0
0.8±0.1
3.9
ERF3T(L) 12.0±1.0 8.0±1.0 25.0±1.5
4.5 –1.0
+2.0
5.0 –1.0
+2.0
0.8±0.1
5.5
ERF5T(L) 13.0±1.0 9.0±1.0 25.5±1.5
4.5 –1.0
+2.0
5.0 –1.0
+2.0
0.8±0.1
6.7
ERF7T(L) 16.0±1.0 9.0±1.0 29.0±1.5
+2.0
–1.0
4.5
+2.0
–1.0
7.5
0.8±0.1
(1.0±0.1)
8.8
ERF10T(L) 16.0±1.0 9.0±1.0 34.0±1.5
4.5 –1.0
+2.0
7.5 –1.0
0.8±0.1
(1.0±0.1)
10.7
P
+2.0
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
01 Aug. 2012
62
Wirewound Resistors,
Flameproof, Bath-tub Type
ERFZ (Off PC Board Type)
■ Ratings
Discontinued
max.
Dielectric
Withstanding
Voltage
(VAC)
Standard
Quantity
pcs.
0.22
820
1000
500
0.39
1.5k
1000
500
Resistance
Range (Ω)
Power
Rating
(W)
min.
ERF5Z
X
Y
5
ERF7Z
X
Y
7
ERF10Z
X
Y
10
0.39
2.2k
1000
500
ERF15Z
X
Y
15
0.51
2.2k
1000
500
ERF20Z
X
Y
120
20
0.51
2.4k
1000
–55 °C
100
Rated Load (%)
Type
Power Derating Curve
For resistors operating in ambient temperatures above
70 °C (25 °C) power rating shall be derated in accordance with the figure below.
25 °C
70 °C
5, 7,10Z, ZX, ZY
80
15, 20Z, ZX, ZY
60
40
20
0
–60 –40 –20
500
155 °C max.
0
20
40
60
275 °C
80 100 120 140 160 180 200 220 240 260
Ambient Temperature (°C)
■ Dimensions in mm (not to scale)
(Z)
W
( ZX, ZY )
W
(H1)
H4
(t)
H3
H3
(H1)
H2
H2
( Z, ZX, ZY )
T2
T3
L
Type
ERF5Z
ERF7Z
H4
P
T1
T2
T4
T1
T3
Dimensions (mm)
L
P±1.5
W±1.0
(H1)
H2±1.0
+2
H3
H4±0.5
T1±0.3
T2±0.2
T3±0.2
T4
(t)
Mass (Weight)
[g/pc.]
6
X 27.0±1.0
15.0
9.5
24
9.5
10
4.5
7.3
1.6
1.4
—
0.5
Y 27.0±1.0
15.0
9.5
39
9.5
25
4.5
7.3
1.6
1.4
—
0.5
7
27.0±1.0
(15.0)
9.5
36
9.5
22
4.5
7.3
1.5
1.0
3.5
0.5
6.9
X 35.0±1.0
22.5
9.5
24
9.5
10
4.5
7.3
1.6
1.4
—
0.5
7.6
Y 35.0±1.0
22.5
9.5
39
9.5
25
4.5
7.3
1.6
1.4
—
0.5
8.6
35.0±1.0
(22.5)
9.5
36
9.5
22
4.5
7.3
1.5
1.0
3.5
0.5
8.5
(1)
(2)
X 48.0±1.5
35.0
9.5
24
9.5
10
4.5
7.3
1.6
1.4
—
0.5
10
ERF10Z Y 48.0±1.5
35.0
9.5
39
9.5
25
4.5
7.3
1.6
1.4
—
0.5
10.8
(3)
48.0±1.5
(35.0)
9.5
36
9.5
22
4.5
7.3
1.5
1.0
3.5
0.5
10.6
X 48.0±1.5
32.5
12.5
32.5
12.5
15
5.0
10.0
3.0
2.7
—
0.5
17
ERF15Z Y 48.0±1.5
32.5
12.5
47.5
12.5
30
5.0
10.0
3.0
2.7
—
0.5
20
48.0±1.5
(32.5)
12.5
47.5
12.5
30
5.0
10.0
2.0
1.5
5
0.5
19.2
X 63.5±1.5
47.5
12.5
32.5
12.5
15
5.0
10.0
3.0
2.7
—
0.5
23.5
ERF20Z Y 63.5±1.5
47.5
12.5
47.5
12.5
30
5.0
10.0
3.0
2.7
—
0.5
26.5
30
5.0
10.0
2.0
1.5
5
0.5
25.7
(4)
(5)
12.5
47.5
12.5
63.5±1.5 (47.5)
Note: (1) to (3); Tolerance +2 to +6, (4) to (5); Tolerance 0 to +4.
Recommended PWB Hole
Dimensions (mm)
Power Rating
(W)
2–0.8L2
R0.2
P
Z
15
R0.2
3.5
5
ZX · ZY
22.5
2
7
P
P
10
2–1.0L3.5
R0.2
2.5
20
R0.2
5
15
35
1
P
P
32.5
47.5
1.2
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
01 Aug. 2012
63
Wirewound Resistors,
Flameproof, Bath-tub Type
■ Temperature Rising Data
Discontinued
Axial Leads Type
(Hot Spot Temperature)
Radial Insertion Type
(Hot Spot Temperature)
(Terminal Temperature of
PC Board Conjunction Point)
measurement
position (M.P)
200
5A
3A
2A
100
0
50
100
Percent of Rated Load (%)
(t=1.6 mm)
P.C.B 1.6t
Phenolic
7T
3T
50
0
measurement (t=1.6 mm)
position (M.P) P.C.B 1.6t
Phenolic
10T
5T
7T
100
2T
3T
50
0
100
50
Percent of Rated Load (%)
2T
100
50
Percent of Rated Load (%)
(Terminal Temperature of
PC Board Conjunction Point)
150
20Z 15Z 10Z
7Z
measurement
position (M.P)
5Z
Temperature Rise 6T (°C)
Temperature Rise 6T (°C)
10T
100
Off PC Board Type
(Hot Spot Temperature)
300
Temperature Rise 6T (°C)
10A
7A
150
5T
200
100
0
50 100 150 200
Percent of Rated Load (%)
100
m
po eas
sit ure
ion m
(M ent
.P)
300
Temperature Rise 6T (°C)
Temperature Rise 6T (°C)
150
measurement position (M.P)
(t=1.6 mm)
P.C.B 1.6t
Phenolic
20ZX
15ZX
10ZX
20ZY
7ZX
5ZX
15ZY
10ZY
7ZY
5ZY
50
0
50
100 150 200
Percent of Rated Load (%)
■ Packaging Methods
Please contact the factory for packaging methods
Safety Precautions
The following are precautions for individual products. Please also refer to the common precautions for Fixed Resistors
shown on this catalog.
1. Since Wirewound Resistors (hereafter called the resistors) generate heat during use, mount them on your
product and carefully check the effect of heat on other components. Provide for adequate safety when designing
your product. Otherwise, when a short circuit or other abnormality occurs, or when a voltage or current exceeding
the rating is applied, the resistors may overheat without breaking, or may generate smoke or red-heat, breaking
the ceramic case and thus exposing the red-heating resistor element.
2. Carefully check the inductance effect of the resistors when using them in a high-frequency circuit.
3. If a transient load (heavy load in a short time) like a pulse is expected to be applied, check and evaluate the
operations of the resistors when installed in your products under the most adverse conditions before use.
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
01 Aug. 2012
64
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