Panasonic ERJM1W User Manual

Subject

Low Resistance Value Chip Resistor

Part No.

ERJM1W

1.Dimension

ERJM1WT type

L

1)

1) Protective Coating 2) Resistive Element 3) Terminal
Resin Alloy Metal Metal

3)

a

W

T

4)2)

ERJM1WS type

1)

L

3)

4) Outer

Terminal

Metal Plating

Spec. No.

151-RJM-E01MM

1

10 -

a

W

T

4)2)

(Sn)

L W T a

ERJM1WT

ERJM1WS

2.Power Derating Curve

Category Temperature Range (Operating Temperature Range): -55 to +170 deg.C

120
100

80
60
40

20

0

6.40+/-0.40

[.252+/-.016]

6.40+/-0.25

[.252+/-.010]

-40 1200 8040 160

-55

3.20+/-0.25

[.126+/-.010]

0.80+/-0.30

[.031+/-.012]

70

2.10+/-0.30

[.083+/-.012]

1.00+/-0.25

[.039+/-.010]

Unit: mm, [inches]

170

200

Ambient Temperature (deg.C)

Fig.1

PANASONIC ELECTRONIC DEVICES CO.,LTD.

Subject

Low Resistance Value Chip Resistor

Part No.

ERJM1W

3.Ratings

Item Specifications Explanation

Power Rating

Rated Continuous Working
Voltage (RCWV)

Resistance Tolerance F:+/-1%, J:+/-5%
Resistance Range

(Standard Resistance Value)
Circuit board of use

1.0W

(70deg.C)

The rated voltage at each resistance shall be calculated from the
equation below,

E

P

E: RCWV(V), P: Rated Power(W), R: Resistance Value( )

ERJM1WT type
ERJM1WS type

You shall use the aluminum substrate when the added wattage
exceeds 0.5W.

Spec. No.

151-RJM-E01MM

10 -

When you use one at ambient temperature over
70deg.C, the load power shall be reduced as
shown in Fig.1.

R

: 1m to 4m
: 3m to 20m (3, 4, 5, 6, 10, 15, 20m )

(1, 1.5, 2, 3, 4m

)

2

4. Explanation of Part Number

E

Chip Resistor Structure Rated Power Type Tolerance Resistance Value Packaging

(Ex.)

T Wide Terminal
S Standard Terminal

5. Appearance and Construction

Item Specifications and Explanation

1. The surface of resistor is covered with protective coating and hard to
fade, then don't have unevenness, flaw pinhole and discoloration.

Appearance and
Construction

2. The surface of terminal is covered by the plating. And the plating is

hard to fade, then don't have unevenness, flaw, pinhole and
discoloration.

3. The terminal is connected with resistive plate certainly.

F +/- 1%
J +/- 5%

3M0 3m
10M 10m

U Embossed Taping

UM 03FSW1MJR

PANASONIC ELECTRONIC DEVICES CO.,LTD.

Subject

Low Resistance Value Chip Resistor

Part No.

ERJM1W

As far as there shall not designation especially, the following test and measurement
shall be operated under normal temperature(5 to 35deg.C), normal humidity(45 to
85%), normal atmospheric pressure(8.6

Resistance value shall be

<Measuring method: In measuring resistance value, 4 wires must be put on top terminal.>

6.Electrical Performance Characteristics

guaranteed as like followings.

Top terminal

104 to 1.06

105Pa).

Spec. No.

151-RJM-E01MM

Wire

10 -

3

Item Specifications Test

DC
Resistance

Temperature
Coefficient

Intermittent
Overload

Dielectric
Withstanding

Insulation
Resistance

DC Resistance value must be within
the specified tolerance.

ERJM1WT type

2m
2m

5m
5m

10m

No evidence of flash over, mechanical
damage, arcing or insulation
breakdown.

350+/-100

100+/-50

ERJM1WS type

+/-350

R = +/-(5%+0.5m

min.1G

+/-100

+/-75

10-6/deg.C

10-6/deg.C

10-6/deg.C

10-6/deg.C

10-6/deg.C

)

Methods(Based on JIS - C5201)

Measuring current: 1A
20deg.C 65%RH

Sequence of temperature:

+25deg.C to +125deg.C

Resistance change after 1,000 cycles (1
second ON, 25 seconds OFF) at 5 times
Rated Power.

AC500V 1 minute

Insulation
Resistance
Meter

or
AC Power
Supply

Measuring Voltage :DC500V

PANASONIC ELECTRONIC DEVICES CO.,LTD.