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Thermal Sensors

TRS Thermal Reed Switch

Overview

The TRS Thermal Reed Switch is a highly reliable, precise

temperature-sensitive switch ideal for energy conservation.

Its unique proprietary design features a magnet and

a temperature-sensing soft ferromagnetic substance

called Thermorite

. The material’s magnetic flux density

decreases as the temperature increases turning it into a

paramagnetic substance at the Curie temperature.

These products have also been attested by the International

Relay Association.

Applications

Typical applications include temperature detection and

overheat monitoring of electric appliances, heat-retention

heater control for rice cookers, defrost for air conditioners

and vending machines, roll heater temperature control for

copying machines, radiator water temperature detection for

automotive electric fan control.

Benefits

•

High reliability for on/off operations

High-speed response

Long operational life

Excellent environmental durability

Extremely simple circuit design

Compact, light and easy to handle

Dust, explosion and corrosion-proof

• Wide range of operating temperatures available

from −10°C to +130°C

• Excellent temperature accuracy of ±2.5°C

• UL and CSA approved for TRS5***BLRU 100V

• UL approved for TRS5***BLRVU 200V

• RoHS/REACH compliant

Axial Type

Wire Harness Type

Case Type

Molded Type

Built Into Tomorrow

Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com

SE0201_TRS • 11/2/2021

Thermal Sensors – TRS Thermal Reed Switch

Ordering Information

M-

Shape

Blank

Mold

TRS

Operating

Temperature

(°C)

M10 = −10°C

0 = 0°C

5 = 5°C

10 = 10°C

15 = 15°C

20 = 20°C

25 = 25°C

30 = 30°C

35 = 35°C

40 = 40°C

45 = 45°C

50 = 50°C

55 = 55°C

60 = 60°C

65 = 65°C

70 = 70°C

75 = 75°C

80 = 80°C

85 = 85°C

90 = 90°C

95 = 95°C

100 = 100°C

105 = 105°C

110 = 110°C

115 = 115°C

120 = 120°C

125 = 125°C

130 = 130°C

Contact

Type

B = Break

M = Make

Shape

Classification

Blank = Molded axial

CR = C shape fixing bar

LR = L shape fixing bar

SR = S shape

Lead

Type

Blank

00 = Wire

harness

01 = Lead

terminal

01E =Lead

terminal

(S shape

only)

Rated

Voltage

(VDC)

Blank = 100 V

V = 200 V

Approvals

Blank = No

approvals

U = UL and CSA

approved for

100 V and UL

approved for

200 V

Maximum

Series Opening/Closing

Power (W)

TRS

1 = 10.0 W

3 = 35.0 W

5 = 60.5 W

Structures and Principles of Operation

Thermal Reed Switches (TRS

) are temperature-sensing switches composed of a magnet and a temperature-

sensing soft ferromagnetic substance called Thermorite

. This material's saturation magnetic ﬂux density

decreases as the temperature

Principles

of Operation

Structures and

increases, and turns into a paramagnetic substance at the Curie temperature.

◆

Our self-developed Themorite is temperature sensing ferrite utilizing Curie-temperature,

where ferrites lose its magnetic property.

Thermorite properties

Thermorite changes its magnetic property rapidly at Curie-temperature.

◆

Features of Thermorite as temperature sensing material.

rapidly at its Curie temperature, providing quick response times.

• Thermorite changes its magnetic property

(1) Curie-temperature do not vary as time advances, because it depends on compounding ratio.

• The Curie temperature of Thermorite does not vary with time, as it is based on a compounding ratio.

(2) Arbitrary shape available as ceramics.

(3)

• Thermorite

moist or hazardous gas.

Stable against

is stable against moisture and hazardous gas.

Thermal property of Thermorite

Permeability - temperature

6000

5000

4000

3000

2000

1000

TC＝150

TC＝30

TC＝60

TC＝90

TC＝120

（1kHz-0.01Oe）

Thermal Reed Switches (TRS) are temperature-sensing switches composed of a magnet and a temperature-sensing soft

ferromagnetic substance called Thermorite. This material’s saturation magnetic flux density decreases as the temperature

Temperature sensing ferrite（Thermorite

Ⓡ

）

increases, and it turns into a paramagnetic substance at its Curie temperature.

Saturation magnetic ﬂux density ‒ temperature

3500

Saturation magnetic ﬂux density

3000

2500

2000

1500

1000

500

TC＝90

TC＝60

TC＝30

TC＝120

TC＝150

Permeability

100

120

140

160

100

120

140

160

Temperature ℃）

（

TC=Curie temperature

Temperature ℃）

（

Encasing

Structure of reed switch

◆

Reed switch is contact switch comprised of a pair of

Fe-Ni alloy reeds encased in glass tube

with inactive gas. The reeds are switched on or off

Inactive gas

by magnetic field of permanent magnet or magnet

coil.

◆

Long lifetime, High environmental resistance

because of protected contact by glass encasing.

◆

Reeds in glass tube become magnetized with

magnetic field, and then two reeds contact and

connect each other (switch on). And then magnetic

Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com

field disappears, the reeds separate and disconnect

(switch off).

Glass tube

Contact

Fe-Ni alloy reed

SE0201_TRS • 11/2/2021

Permeabi

3000

2000

1000

TC＝150

Saturation magneti

2000

1500

1000

500

TC＝90

TC＝60

TC＝30

TC＝120

TC＝150

Thermal Sensors – TRS Thermal Reed Switch

100

120

140

160

100

120

140

160

Structures and Principles of Operation cont.

TC=Curie temperature

Temperature ℃）

（

Temperature ℃）

（

Reed switch structure

• The reed switch is a contact switch

reed switch

of a pair of Fe-Ni alloy

Structure of

comprised

reeds encased in a glass

Reed switch is contact switch comprised of

switched

◆

tube with inactive gas. The reeds are

a pair of

on or off by the magnetic

Fe-Ni alloy

permanent magnet or magnet coil.

field of a

reeds encased in glass tube

with inactive gas. The reeds are switched on or

• The reeds in the glass tube become magnetized from the magnetic

off

by magnetic field of permanent magnet or magnet

field, allowing the two reeds to make contact and connect (switch on).

coil.

When the magnetic field disappears, the

High environmental

disconnect

◆

Long lifetime,

reeds separate and

resistance

because of protected contact by glass encasing.

(switch off).

◆

Reeds in glass tube become magnetized with

• The glass encasement of

magnetic field, and

high environmental

and

the reeds ensures

then two reeds contact

resistance and a long operational life.

connect each other (switch on). And then magnetic

TRS principle : Break (B) type

Encasing

Glass tube

Inactive gas

Contact

Fe-Ni alloy reed

field disappears, the reeds separate and disconnect

(switch off).

TRS principle: Break (B) type

（

■

：Permanent magnet　■

：Thermorite

　■

：Reed switch contact area ）

（

■

：Permanent magnet　■

：Thermorite

　■

：Reed switch contact area ）

Reset temperature

Action temperature

Reset temperature

Action temperature

Thermal magnet = paramagnet

Low temperature

Thermal magnet = NO magnetic

High temperature

NEC TOKIN Sensors Vol.14　5

N S

Magnetic Flux Forming => Reed switch ON

＜Magnetic Field of Contact Part＞

●All specifications in this catalog and production status of

products are subject to change without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.

N S

●Please request for a specification sheet

detailed product data prior to the purchase.

for

●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.

＜Magnetic Field of Contact Part＞

Magnetic Flux ≒0 => Reed switch OFF

2015.3.31　0000SENVOL14E1503H1

Switch ON

Switch OFF

TRS principle : Make (M) type

TRS principle: Make (M) type

（

■

：Permanent magnet　■

：Thermorite

　■

：Gapspacer（SP）：Reed switch contact area ）

　■

（

■

：Permanent magnet　■

：Thermorite

　■

：Gapspacer（SP）：Reed switch contact area ）

　■

Reset temperature

Action temperature

Reset temperature

Action temperature

Thermal magnet = paramagnet

Low temperature

Thermal magnet = NO magnetic

High temperature

S SP N

S N

S SP N

＜Magnetic Field of Contact Part＞

Magnetic Flux ≒0 => Reed switch OFF

＜Magnetic Field of Contact Part＞

Switch OFF

6　NEC TOKIN Sensors Vol.14

Switch ON

●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.

●All specifications in specification sheet for detailed product data prior subject to change

●Please request for athis catalog and production status of products are to the purchase. without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.

●Please request for a specification sheet please read "Precautions" and other safety precautions listed in the printed version catalog.

●Before using the product in this catalog, for detailed product data prior to the purchase.

●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.

2015.3.31　0000SENVOL14E1503H1

Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com

SE0201_TRS • 11/2/2021

External magnetic ﬁeld

Thermal Sensors – TRS Thermal Reed Switch

TRS/OHD installation direction in external magnetic ﬁeld

External magnetic ﬁeld

Magnetic ﬁeld from equipment

External Magnetic Field

Magnetic ﬁeld emitting equipment

such as motors, coils

TRS/OHD installation

in external

external magnetic ﬁeld

TRS installation

direction in

magnetic field

Magnetic ﬁeld from equipment

Wrong direction Correct direction

Magnetic ﬁeld emitting equipment

such as motors, coils

Wrong direction Correct direction

Magnet inside TRS is

parallel to the external ﬁeld

→ Greater Inﬂuence

Magnet inside TRS is

perpendicular to the external ﬁeld

→ Less inﬂuence

Magnet inside TRS is

parallel to the external ﬁeld

→ Greater Inﬂuence

Magnet inside TRS is

perpendicular to the external ﬁeld

→ Less inﬂuence

Ferromagnetic material inﬂuence

Ferromagnetic material influence

Operation temperature variation

(°C)

Ferromagnetic material inﬂuence

－1

－2

－3

－4

－5

Operation temperature variation

(°C)

－1

－2

－3

－4

－5

Gap distance_d

（mm）

BType

MType

TRS

BType

MType

Soft iron (thickness 3.3mm)

Note; Above ﬁgures are for reference only and are not guarantee

d values.

TRS

Before Using Thermal Reed Switch (TRS

ﬁgures are for

)

reference only and are not guarantee

d values.

Note; Above

• Please ask for a copy of speciﬁcation and check the contents thoroughly before the actual use.

• Please contact us before deciding your speciﬁcations.

• Do not use in close proximity to strongly magnetized parts.

Before

if dropped or

Reed Switch (TRS

)

• Do not use

Using Thermal

strongly shocked.

• Please with greater of speciﬁ speciﬁed.

• Do NOT useask for a copyload thancation and check the contents thoroughly before the actual use.

W h•ePlease lcontact se swi tchedeciding iyour one to cations.ng surge vol tage ( i nducti ve l oad) or rush current

n i nsta l i ng theus before s i n ci rcu ts pr speciﬁproduci

• Do not use in close proximity to strongly magnetized parts.

(in lamps and motors), an appropriate switch type should be used, or a contact point protection circuit added.

• d s ress ( es if dropped i o strongly of addi ti

• A voiDotnot usepeci al l y torsorn) i n case shocked.onal processi ng.

• reed switch has speciﬁ load than speciﬁed.

• EachDo NOT use withagreaterc resonance frequency. Please contact us when an oscillation is added.

W hen i nstal l i ng these swi tches i n ci rcui ts prone to produci ng surge vol tage ( i nducti ve l oad) or rush current

(in lamps and motors), an appropriate switch type should be used, or a contact point protection circuit added.

• A voi d stress ( especi al l y torsi on) i n case of addi ti onal processi ng.

NEC TOKIN Sensors Vol.14

• Each reed switch has a speciﬁc resonance frequency. Please contact us when an oscillation is added.

Gap distance_d

（mm）

Soft iron (thickness 3.3mm)

ciﬁcations in this catalog and production status of pr

request for a speciﬁcation sheet for detailed product

using the product in this catalog, please read "Precau

ducts are subject to change without notice. Prior to the purch

ata prior to the purchase

ions" and other safety precautions listed in the printed versi

NEC TOKIN Sensors Vol.14

se, please contact NEC TOKIN for updated product .data

n catalog

2015.3.31 0000SE

NVOL14E1503H

SE0201_TRS • 11/2/2021

se, please contact NEC TOKIN for updated product .data

n catalog

All speciﬁcations in this catalog and production status of pr

ducts are subject to change without notice. Prior to the purch

Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com

Please request for a speciﬁcation sheet for detailed product

ata prior to the purchase

Before using the product in this catalog, please read "Precau

ions" and other safety precautions listed in the printed versi

Thermal Sensors – TRS Thermal Reed Switch

Dimensions – Millimeters

Part

Number

Dimensions - Millimeters

TRS5-***BLR00

TRS5-***BLR00V

TRS1-***MLR00V

TRS3-***MLR00

TRS5-***BLRU

TRS5-***BLRVU

Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com

SE0201_TRS • 11/2/2021

型号	TRS5-25BLRVU	TRS5-105BLRVU	TRS5-65BLRVU	TRS5-5BLRU	TRS5-15BLRVU	TRS5-55BLRU
描述	KEMET 干簧管, SPST, 最大切换电压264V 交流, 通孔安装	KEMET 干簧管, SPST, 最大切换电压264V 交流, 通孔安装	KEMET 干簧管, SPST, 最大切换电压264V 交流, 通孔安装	KEMET 干簧管, SPST, 最大切换电压140V 交流, 通孔安装	KEMET 干簧管, SPST, 最大切换电压264V 交流, 通孔安装	KEMET 干簧管, SPST, 最大切换电压140V 交流, 通孔安装
类别	传感器;温湿度传感器	传感器;温湿度传感器	传感器;温湿度传感器	传感器;温湿度传感器	传感器;温湿度传感器	传感器;温湿度传感器
厂商名称	KEMET(基美)	KEMET(基美)	KEMET(基美)	KEMET(基美)	KEMET(基美)	KEMET(基美)
系列	TRS™	TRS™	TRS™	TRS™	TRS™	TRS™
包装	散装	散装	散装	散装	散装	散装
电路	SPST-NC	SPST-NC	SPST-NC	SPST-NC	SPST-NC	SPST-NC
开关温度	77°F（25°C）	221°F（105°C）	149°F（65°C）	41°F（5°C）	59°F（15°C）	131°F（55°C）
额定电流 - AC	0.275A（264V）	0.275A（264V）	0.275A（264V）	0.5A（140V）	0.275A（264V）	0.5A（140V）
容差	±4.5°F（±2.5°C）	±4.5°F（±2.5°C）	±4.5°F（±2.5°C）	±4.5°F（±2.5°C）	±4.5°F（±2.5°C）	±4.5°F（±2.5°C）
开关次数	100K	100K	100K	100K	100K	100K
端接样式	导线引线	导线引线	导线引线	导线引线	导线引线	导线引线
安装类型	底座安装	底座安装	底座安装	底座安装	底座安装	底座安装
封装/外壳	轴向	轴向	轴向	轴向	轴向	轴向