LITTELFUSE 3425L200, 2029S100, 2029L260, 2029L125, 2029L100 Datasheet

RESETTABLE PTCs

SURFACE MOUNT PTC

2029L/3425L Series	®	TUV
		PRODUCT SERVICE

• The 2029L/3425L Series Resettable devices utilize a

ENVIRONMENTAL SPECIFICATIONS:

unique polymer-based, Positive Temperature Coefficient

Passive Aging: 85°C, 1000 Hours. ±5% typical resistance

(PTC) material to protect electrical circuits against over-

change.

current conditions.

Humidity Aging: 85°C, 85% R.H., 1000 hours. ±5% typi-

• In normal operation, the 2029L/3425L Series PTC has

cal resistance change.

many conductive paths and a very low resistance. In an

Thermal Shock: 85°C / –40°C, 20 times. ±10% typical

overcurrent condition, the temperature of the polymer

resistance change.

material rises. This dramatically reduces the conductive

Vibration: MIL-STD 202, Method 201. No resistance

paths resulting in an immediate rise in resistance. In this

change.

condition, the device provides circuit protection by signif-

Mechanical Shock: MIL-S

D-202, Method 213 test condi-

icantly limiting the flow of current. However, once the

cause of the initial overcurrent condition is eliminated,

tion I (100 g’s, 6 sec.). No resistance change.

the 2029L/3425L Series PTC cools down and resets to a

Max. Surface Temperature: 125°C

low resistance value permitting the normal current flow

perating/Storage Temperature: –40°C to 85°C

to resume.

• The 2029L/3425L Series are surface mountable.

Rerating Curve for 2029L /3425L Series

AGENCY APPROVALS: Recognized under the

200

Program of Underwriters Laboratory and the

Components OBSOLETE

Component Acceptance Program of CSA. TUV approved.

Current

150

AGENCY FILE NUMBERS: UL E183209, CSA LR 108832

of ated

100

PHYSICAL SPECIFICATIONS:

Percentage

Materials: Terminal Material: Tin Plated Brass to

MIL-T-10727B

50

Lead Solderability: Meets EIA specification RS186-9E

PART

Device Labeling: Device is marked with the letter ‘L’, 0

amperage rating and date code.

-40 -30 -20 -10 0 10

20 30 40 50 60 70 80 90

Packaging: Packaged in tape and reel carrier per

Temperature (°C)

EIA 481-2 standard

Standard reel quantities:

Part

Reel

Packaging

Number

Quantity

Suffix

2029L Series

2000

PR

3425L Series

1500

DR

22