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Fast Response 10k Ohm Ntc Power Thermistor For Lamps / Ballasts

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Guangdong Uchi Electronics Co.,Ltd

City: dongguan

Province/State:guangdong

Country/Region:china

Tel:86--18925858717

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Fast Response 10k Ohm Ntc Power Thermistor For Lamps / Ballasts

Place of Origin	Dongguan，Guangdong,China
Brand Name	UCHI
Certification	UL.VDE.SGS.
Model Number	MF72
Minimum Order Quantity	1000PCS
Price	Negotiable
Packaging Details	Bulk/Ammo/Reel
Delivery Time	3~5 working days
Payment Terms	T/T,Paypal,Western Union,Money gram
Supply Ability	8000,000,000PCS Per Month

Detailed Product Description

Fast Response 10k Ohm Ntc Power Thermistor For Lamps / Ballasts

2.5D-20 Ptc 10K Ntc Thermistor Quick Detail:

• Small Size and fast response

• High Power handling capability

• Fast response to surge current

• High material constant (B value)

• Low residual resistance

• Wide operating temperature range -55 to +200C

• R25 allowable tolerance is ±20%

• Long-term Stability and Reliability

2.5D-20 Ptc 10K Ntc Thermistor Description:

The MF72 power NTC thermistor is a kind of semiconductor ceramic element that mostly made from transition metal oxide material, and belongs to negative temperature thermistors. When you tune on an electrical equipment ,the surge current can be restrained by a power NTC thermistor connected in series with the power circuit .Because of the continuing action of current, temperature of power NTC thermistor raising, the resistance will rapidly drop to a small value, the consumed power can be ignored. So it can not affect normal operating current. Therefore, using power NTC thermistor is a most effectively amd most brief measure to restrain surge current, protecting electrical equipment from destruction.

2.5D-20 Ptc 10K Ntc Thermistor Applications:

Can be installed into the power circuits of:

• Power supplies and inverters

• Uninterruptible Power Supplies

• Energy saving lamps

• Electronic Ballasts

• Filament Protection of various types of lamps

• Some types of heaters

• For higher power circuits ask about the MF73

and MF74 series surge suppressors.

2.5D-20 Ptc 10K Ntc ThermistorSpecifications:

Production Sign Explain

2.5D-20 Ptc 10K Ntc ThermistorRemark:

1. The Max. Steady State Current meets when the decimal expressed with three figures.

Other expressed with the actual value.

2.The Rated Zero-power Resistance meets the decimal or is bigger than is 100Ω when with three expressions, other expressed with two.

2.5D-20 Ptc 10K Ntc ThermistorShapec Structure Picture

2.5D-20 Ptc 10K Ntc Thermistor Specification

Part No.:MF21-2.5-D20MSSB			NTC THERMISTOR 2.5W				Rev.: 1/A (2012.05.30)
1. APPEARANCE
1-1. Dimensions (mm)						1-2. Marking NTC 2.5D-15
						1-3.Coating Coating
						Material PF resin		Color Black
						1-4. Leads Tin – plated copper wire Straight
DMax: 22.5	TMax: 7.0			F: 10±1.0
d: 1.0±0.05	LMin: 25
2. MECHANICAL CHARACTERISTICS
Item		Specification			Test Conditions & Methods
2-1. Solder-ability		The terminals shall be uniformly tinned, and its area≥95%			Dipping theNTC terminals to a depth of 15mm in a soldering bath of245±5℃ and to the place of 6mm far from NTC body for 3±0.5s (See IEC68-2-20 /GB2423.28 Ta )
2-2. Resistance To Soldering Heat		No visible mechanical damage. ΔR/RN ≤20% (ΔR =RN-RN')			Dipping the NTC terminals to a depth of 15mm in a soldering bath of 260±5℃ and to the place for 6mm below from NTC body for 3±0.5s.After recovering4-5h under 25±2℃. The rated zero power resistance value RN' shall be measured. (See IEC68-2-20 /GB2423.28 Tb)

Part No.:MF21-2.5-D20MSSB

NTC THERMISTOR

2.5W

Rev.: 1/A (2012.05.30)

2-3. Strength of lead terminal

No break out

ΔR/RN ≤20%

(ΔR =RN-RN')

Fasten the body and apply a force gradually to each lead until 10N and then keep for 10sec, Hold body and apply a force to each lead until 90°slowly at 5N in the direction of lead axis and then keep for 10sec, and do this in the opposite direction repeat for other terminal. After recovering 4~5h under 25±2℃, the rated zero power resistance value RN' shall be measured.

(See IEC68-2-21/GB2423.29 Ua / Ub)

3.ELECTRICAL CHARACTERISTICS

3-1.Test Conditions & Method

Items

Spec.

Test Conditions & Methods

3-1-1.Rated Zero-Power Resistance

RN (W)

2.5±20%

Ambient temp. Range:25℃±2℃(TA).

Testing voltage: 1.5VDC

After placing for 1~2 hours under TA, the resistance value shall be measured.

3-1-2.Thermal Dissipation Constant

(mW/°C)

≥24

The thermal dissipation constant(d) could be calculated by the ratio of a change in power dissipation(DP) of the thermistor to a change in temperature(DT) of the thermistor at a specified ambient temperature

3-1-3.Thermal Time Constant

t (s)

≤88

The time(t) shall be measured within which the temperature change of NTC thermistor is reached at 63.2% of the ambient temperature change under zero power condition

3-1-4.Material Constant

B (°K)

2800±10%

B=T1T2/( T2- T1) ×Ln (R1/R2)

R1 , R2 is zero-power resistance at T1 , T2

T1 = 298.15°K(25°C) T2 = 323.15°K(50°C)

3-1-4.Material Constant

B (°K)

2800±10%

B=T1T2/( T2- T1) ×Ln(R1/R2)

R1 , R2 is zero-power resistance at T1 , T2

T1 = 298.15°K(25°C) T2 = 323.15°K(50°C)

Part No.:MF21-2.5-D20MSSB

NTC THERMISTOR

2.5W

Rev.: 1/A (2012.05.30)

3-1-5.Max.Steady State Current

(A)

No visible mechanical damage.

ΔRN / RN ≤20%

(ΔR =RN-RN')

Ambient temp. Range:25℃±2℃.

Testing Current :7A

4. Reliability Test

Items

Spec.

Test Conditions & Methods

*4-1. Temp. Cycling Testing

No visible mechanical damage.

ΔRN / RN ≤20%

(ΔR =RN-RN')

Ta:-40±3℃/ 30min→25±2℃/ 5min→ Tb:160±3℃/ 30min→25±2℃/ 5min Cycles: 5times

After recovering 4~5 h under 25±2℃, the rated zero power resistance value RN' shall be measured.

*4-2. Electrical Cycling Testing

Ambient temp. Range:25℃±2℃.

Cycles: 2,000times On / Off: 5 s / 55 s

Test Current: 7A

After recovering 4~5h under 25±2℃, the rated zero power resistance value RN' shall be measured.

*4-3.LoadLife ( Endurance ) Testing

Ambient temp. Range:25℃±2℃; 7A/ 1,000±24h

After recovering 4~5 h under 25±2℃, the rated zero power resistance value RN' shall be measured.

*4-3. Humidity Testing

No visible mechanical damage.

ΔRN / RN ≤20%

(ΔR =RN-RN')

Ambient temp. range : 40℃±2℃

R.H.:93±3% , Energized time:1000±24 h

After recovering 4~5 h under 25±2℃, the rated zero power resistance value RN' shall be measured.

Part No.:MF21-2.5-D20MSSB

NTC THERMISTOR

2.5W

Rev.: 1/A (2012.05.30)

5. INSPECTION

5-1. Lot Inspection

Sampling with IEC410 / DIN ISO 2859-1 (GB/T2828.1-2003) ; Testing with SPEC.NO.: WWSMF21-15-18.

Item

AQL

Item

AQL

Appearance

Ⅱ

0.65

Rated Zero-Power Resistance

Ⅱ

0.65

Soldering-ability

S-2

2.5

Max.Steady State Current

(A)

S-2

5-2. Periodic Inspection

See the items with

6. NUMBERING SYSTEM AND PACKING

6-1. PART NUMBERING

MF21

2.5

D15

1 2 3 4 5 6 7

1 Series: MF21 - For limiting of inrush current

2 Rated Zero Power Resistance: 3 - 3Ω 5 - 5Ω

3 Disc. Diameter: D15 - 15mm D11 - 11mm

4 Tolerance of Resistance: M - ±20% K - ±10%

5 Shape of Leads: U - In-formed S - Straight

A - Axis Formed N - No Leads

6 Coating Material : S - Silicone N - No Coating

P - PF Resin E - Epoxy

7 Packing Type :B - Bulk A - Ammo R - Reel

Part No.:MF21-2.5-D20MSSB

NTC THERMISTOR

2.5W

Rev.: 1/A (2012.05.30)

6-3. Packing Type

Bulk

7. Operating Temperature Range:

-55 ~ + 200℃

8. STORAGE CONDITIONS:

8-1.Temperature: -10℃~+40℃

8-2. Humidity: ≤70%RH

8-3. Term: ≤6 months (First-in/ First-out)

8-4. Place:

Do not exposing the components to the following conditions, otherwise, it may result in deterioration of characteristics.

1) Corrosive gas or deoxidizing gas.

2) Flammable and explosive gases.

3) Oil, water and chemical liquid.

4) Under the sunlight.

8-5. Handling after seal open: After unpacking of the minimum package, reseal it promptly or store it inside a sealed container with a drying agent.

9. WARNING !

Do not apply the components under the following conditions, otherwise, it may result in deterioration of characteristics, destruction of components or in the worst case, to catching fire.

1) Exceeding Imax.

2) Exceeding rated temperature range.

3) Inferior thermal dissipation (Due to badly inferior thermal dissipation, some part of the components body will become overheated and then be damaged.)

2.5D-20 NTC Thermistor Image

Product Tags: power ntc thermistor ntc thermistor assembly

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