ASMDC125F/33-2 Littelfuse PolySwitch ASMDC125F/33-2 is a polymeric PTC resettable fuse rated for 33V DC with a hold current of 1.25A at 25°C and a trip current of 2.50A.
Mfr Part #:

ASMDC125F/33-2

Available from 1 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse PolySwitch ASMDC125F/33-2 is a polymeric PTC resettable fuse rated for 33V DC with a hold current of 1.25A at 25°C and a trip current of 2.50A.
Total Stock: 10 pcs
$ Price Range: $0.38 - $0.96

ASMDC125F/33-2 Available from 1 distributor

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
10 pcs
10 pcs On Request 1 On Request On Request 2026-02-25 06:16:38 On Request On Request

ASMDC125F/33-2 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Current
Halogen Free
Hold Current (Nominal @ 0 °C)
Hold Current (Nominal @ 25 °C)
Hold Current (Nominal @ 60 °C)
Length
Medical Grade
Military Grade
Mounting Type
Package / Case
Ratings
Resistance
SVHC Present
Short Circuit Current
Tape & Reel
Termination Finish
Termination Style
Thickness
Thickness (Max)
Time to Trip
Trip Current (Nominal @ 0 °C)
Trip Current (Nominal @ 25 °C)
Trip Current (Nominal @ 60 °C)
Tripped-State Power Dissipation
Type
Voltage
Voltage Rating
Width
resistance (Maximum @ 25 °C, 1 hour after reflow)
resistance (Minimum @ 25 °C, initial)

ASMDC125F/33-2 Description

Short technical summary and product information.

The Littelfuse PolySwitch ASMDC125F/33-2 is a surface-mount polymeric PTC resettable overcurrent protection device. It is rated for a maximum voltage of 33V DC and a short circuit current of 40A. At 25°C, the hold current is 1.25A and the trip current is 2.50A. The device trips within 2 seconds at 8.0A (25°C).

 

Initial resistance at 25°C is 0.04 Ω minimum, and maximum resistance after reflow is 0.25 Ω. Tripped-state power dissipation is 1.5W maximum at 25°C and 33V. The fuse is housed in a 2-SMD package measuring 7.50 mm x 5.10 mm with a maximum thickness of 0.71 mm. Terminations are tin plated.

 

The ASMDC125F/33-2 is RoHS compliant, Pb-Free, and Halogen Free. It is suitable for overcurrent protection in a variety of electronic circuits where resettable protection is desired.

ASMDC125F/33-2 Quick Information

Product Type: PTC Resettable Fuse
Series: ASMDC
Canonical Name: ASMDC125F/33-2 PolySwitch Polymeric PTC Resettable Fuse
Subcategory: Surface Mount PTC Fuses

ASMDC125F/33-2 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Yes

ASMDC125F/33-2 Estimated Pricing

Qty Low High
1+ $0.96 $0.96
10+ $0.86 $0.86
50+ $0.70 $0.70
100+ $0.66 $0.66
200+ $0.61 $0.61
500+ $0.55 $0.55
1,000+ $0.50 $0.50
2,000+ $0.49 $0.49
4,000+ $0.38 $0.38

Estimated market price range - modelled values for guidance only, not live distributor offers.

ASMDC125F/33-2 Features

  • Polymeric PTC resettable overcurrent protection.
  • Rated for 33V DC and 40A short circuit.
  • 1.25A hold current at 25°C.
  • 2.50A trip current at 25°C.
  • Surface mount 2-SMD package.

ASMDC125F/33-2 Applications

  • Overcurrent protection in consumer electronics.
  • Protection for USB and battery circuits.
  • Used in industrial control and automation.
  • Suitable for automotive and telecom equipment.

ASMDC125F/33-2 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the hold current of the ASMDC125F/33-2 at 25°C?

The hold current is 1.25 A at 25°C.

What is the maximum voltage rating for this PTC fuse?

The maximum voltage rating is 33 V DC.

What is the trip current at 25°C?

The trip current is 2.50 A at 25°C.

What is the maximum time to trip at 8.0 A?

The maximum time to trip at 8.0 A and 25°C is 2 seconds.

What package does the ASMDC125F/33-2 come in?

It comes in a 2-SMD surface mount package.

Is the ASMDC125F/33-2 RoHS compliant?

Yes, it is RoHS compliant and Pb-Free.

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