RD1/4WS510OHMJT/B datasheet, PDF

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RD1/4WS510OHMJT/B: DescriptionFixed Resistor, Carbon Film, 0.25W, 510ohm, 200V, 5% +/-Tol, -450ppm/Cel,; CategoryPassive components The resistor; File Size153KB，7 Pages; ManufacturerTY-OHM Electronic Works Co., Ltd.; Environmental Compliance

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RD1/4WS510OHMJT/B Overview

Fixed Resistor, Carbon Film, 0.25W, 510ohm, 200V, 5% +/-Tol, -450ppm/Cel,

RD1/4WS510OHMJT/B Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Objectid	947505729
Reach Compliance Code	compliant
ECCN code	EAR99
structure	Cylindrical
Lead diameter	0.45 mm
Number of terminals	2
Maximum operating temperature	155 °C
Minimum operating temperature	-55 °C
Package diameter	1.7 mm
Package length	3.7 mm
Package shape	CYLINDRICAL PACKAGE
Package form	Axial
method of packing	Tape
Rated power dissipation(P)	0.25 W
resistance	510 Ω
Resistor type	FIXED RESISTOR
series	RD
technology	CARBON FILM
Temperature Coefficient	-450 ppm/°C
Tolerance	5%
Operating Voltage	200 V

RD1/4WS510OHMJT/B Preview

CARBON FILM RESISTORS,FLAMEPROOF

1. Applicable Scope:

This standard specification is for use in consumer electronics, computers,

telecommunications, control instruments...etc.

2. Part Number:

It is composed by Type, Rated Wattage,Nominal Resistance, Tolerance and

Package/Terminal Form. e.g.

Type

1/4W

Rated Wattage

100Ω

Nominal Resistance

Tolerance

T/B

Package/Terminal Form

2.1 Type :

Carbon Film Resistors are called "RD". "RDN" represents flameproof.

2.2 Rated Wattage:

Shown by "W", such as RD 1/8W(1/6W,1/4WS),1/4W(1/2WS),1/2W; RDN 1W,2W.

2.3 Nominal Resistance:

Ω,KΩ,MΩare

its unit, which be in accordance with JIS-C6409 article 6 (EIA RS-196A)

series.

2.4 Tolerance:

It is measured by Bridge-method at room temperature and expressed by a capital letter.

G＝±2% , J＝±5% ,K＝±10%.

2.5 Package/Terminal Form:

T/R＝tape & reel ; T/B＝tape in box; Nil＝Bulk ; MG form, M form, F form.

Remark : RD Series Resistors are RoHS Compliant.

3. Rated Power:

Rated power is the value of Max load voltage specified at the ambient temperature of 70℃,

and shall meet the functions of electrical and mechanical performance. When the ambient

temperature surpasses above mentioned temperature, the value declines as per following

DERATING CURVE

1 of 6

CARBON FILM RESISTORS,FLAMEPROOF

3.1 Rated Voltage:

It is calculated through the following formula:

where E: rated voltage (V)

P: rated power (W)

PXR

R: nominal resistance value (Ω)

However, in case the voltage calculated exceeds the maximum load voltage, such the

maximum load voltage shall be regarded as its rated voltage, means whichever less.

4. Dimension and structure:

4.1 Dimension:

TYPE

RD 1/8W,1/6W,(1/4WS)

RD 1/4W(1/2WS)

RD 1/2W

RDN 1W

RDN 2W

D±1

1.7±0.2

2.4±0.5

3.5

4.5

L±1

3.7max

6.4

H±3

d±0.1

0.45

0.6

0.65

0.8

Resistance

Range

3.9Ω~4.7MΩ

3.9Ω~10MΩ

Unit: mm

Max

Working

Voltage

200V

250V

350V

500V

750V

◎

Notes:1. too low or too high ohm value can be supplied only case by case.

2. Max Overload Voltage is 2 times of Max Working voltage.

3. Resistance value over 4.7MΩ (≧4.7MΩ), while RD 1/8W is

≧1MΩ,

the tolerance shall be

±10%.

4.RD 1/4W,1/2W can also supply flameproof form (RDN).

4.2 STRUCTURE:

4.2.1 Ceramic Rod:

It is made of Forsterite imported from Japan.

4.2.2 Carbon Film:

Under high vacuum and high temperature to split and oxidize the pure

carbon-hydric.

4.2.3 Terminal:

Terminal is to be firmly connected with resistors element, both electrically and

mechanically, and allow easy soldering.

4.2.4 Coating:

Coating is done by EPOXY insulating paint which is solid enough to be free from

looseness, crack and easy breakage. The paint shall be limited within 1mm of lead

wires from resistors body while the rated wattage is 2W the paint is limited within

2mm. RDN type is coated by flameproof paint which is resistant to 800℃ without

causing looseness, crack and easy breakage.

4.2.5 Marking:

Marking is made by color coding on surface.

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CARBON FILM RESISTORS,FLAMEPROOF

5. Operating Temperature Range: -55℃½155℃

6. Mechanical Performance:

6.1 Terminal tensile:

To Fix the resistor body, a static load of 1.5kgs. (1/8W & 1/4W axial form:1kg.)is to be

gradually applied into the terminal for 10 seconds without causing any looseness and

fall.

6.2 Twist withstand:

To bend the lead wire at the point of about 6mm from resistor body to 90°, then catch

the wire at 1.2

±0.4mm

apart from the bent point end and turn it (clockwise) by 360

degrees perpendicular to the resistor axis at speed of 5 seconds per turn, and do the

same counterclockwise again which constitute a whole turn. Repeat the turn 2 times

without causing any break and looseness.

7. Electrical Performance:

7.1 Resistance Temperature Coefficient:

It shall be as following:

T.C.

TYPE

1/6W , 1/8W

1/4W & OVER

0 ~ -450

≦47KΩ

≦100KΩ

0 ~ -700

51KΩ~100KΩ

110KΩ~1MΩ

0 ~ -1000

110KΩ~330KΩ

1.1MΩ~2.2MΩ

0 ~ -1300

360KΩ~1MΩ

2.4MΩ~4.7MΩ

T.C. (ppm/℃) =［(R2－R1)

÷R1½ ×［1 ÷(T2－T1)½ ×10

where

R1: resistance value at reference temperature

R2: resistance value at test temp.

T1: reference temp. (usu. 25℃)

T2: test temp. (about 75℃)

7.2 Temperature Cycle:

Following temp. cycles are to be made 5 times and then put at room temp. for one hour,

the resistance value change rate between pre-and-post test shall be within

±1%.

Steps

step

Temperature(℃)

-55 ± 3

Room temp.

155 ± 3

Room temp.

Time (minutes)

7.3 Short Time Over Load:

When the resistors are applied 2.5 times as much as rated voltage for 5 seconds

continuously, it shows no evidence of arc, flame...etc. Removing the voltage and place

the resistors to the normal condition for 30 minutes, the resistance value change rate

between pre-and-post test shall be within

±1%.

7.4 Insulation Character :

Resistors are located in a V-shaped metal trough. Using the DC 500V megger

instrument 2 poles to clutch either side of lead wires and metal trough, measuring the

Insulation Resistance which shall be over 10000MΩ.

3 of 6

CARBON FILM RESISTORS,FLAMEPROOF

7.5 Voltage Withstanding:

Resistors are located in a V-shaped metal trough. RD: applying Max overload voltage

for one minute (RDN: applying 350V AC for one minute) and should find no physical

damage to the resistors. The resistance value change shall be within

±0.5%.

7.6 Load Life:

The resistors arrayed are sent into the 70℃ oven, applying rated voltage at the cycle

of 1.5 hours ON, 0.5 hour OFF for 1000

+48

hours in total. Then, after removing the

-0

voltage, take the resistors out of the oven and left under normal temp. for one hour

cooling. The resistance value change rate between pre-and-post test shall be within

±5%.

7.7 Moisture-proof Load Life:

The resistors arrayed are placed into a constant temp./humidity oven at the temp. of 40

±2℃

and the humidity of 90½95%, then rated power is applied for 1.5 hours and cut

off for 0.5 hour. The similar cycle will be repeated for 500

+24

hours in total (including

-0

cut-off time). Then remove the voltage, taking the resistors out of the oven and leaving

them at room temp. for one hour. The resistance value change rate between

pre-and-post test shall be within

±5%.

There also shall be no evidence of remarkable

change on appearance, and the marking shall not be illegible.

7.8 Solder-ability:

The leads with flux are dipped in a melted solder of 235±5℃ for 2 seconds, more than

95% of the circumference of the lead wires shall be covered with solder.

7.9 Resistance to Soldering Heat:

Two leads are together dipped in a melted solder of 270±5℃ for 10±1 seconds, or 350

±10℃

for 3.5±0.5 seconds, Then remove the resistors and leaving them at room temp.

for one hour. The resistance value change rate between pre-and-post test shall be

within

±1%.

7.10 Nonflammability:(only for RDN)

The resistors are applied the power of 16 times the rated wattage for 5 min. and shall

not get flame.

8.Forming:

8.1 MG Form:

Unit: mm

Wattage

1/4W(1/2WS)

1/2W

L±1

6.4

D±1

2.4±0.5

3.5

4.5

10±1

15±1.5

20±2

7±1

10±2

h±1

4.5

A±0.02 B±0.05

0.2

0.3

0.8

C±0.2

1.2

1.4

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