Name: 250R145-RAZR PTC RESET FUSE 60V 145MA RADIAL
Brand: Littelfuse Inc.
SKU: 250R145-RAZR
Price: 40.00 USD
Availability: InStock
Rating: 4.9 (2 reviews)

Question 1

What is the Mfr

Accepted Answer

Mfr refers to the component's producing company, whose brand and manufacturing processes directly impact the component's performance, consistency, and traceability, making it a key reference during selection.

Question 2

What is the Series

Accepted Answer

Series indicates a manufacturer’s organized range of components, often named with a common prefix or code, to streamline product selection and ensure compatibility across similar models.

Question 3

What is the Package

Accepted Answer

his term denotes the protective casing (often made of plastic, ceramic, or metal) that encapsulates an integrated circuit, determining its size, reliability, and suitability for different mounting technologies like through-hole or SMT.

Question 4

What is the Height - Seated (Max)

Accepted Answer

This parameter specifies the maximum vertical dimension from the mounting surface (e.g., PCB) to the highest point of a component when it is fully seated and soldered in place. It is a critical mechanical clearance specification for determining the minimu

Question 5

What is the Thickness (Max)

Accepted Answer

This parameter specifies the greatest allowable dimension of a component, material, or assembly measured perpendicular to its primary mounting plane. It defines the maximum physical envelope and is a critical constraint for mechanical design, ensuring pro

Question 6

What is the Package / Case

Accepted Answer

Package / Case refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

Question 7

What is the Type

Accepted Answer

This parameter categorizes a component based on its fundamental operating principle, internal structure, or primary application domain. It serves as the highest-level identifier, grouping devices with shared core characteristics—such as "N-Channel MOSFET,

Question 8

What is the Product Status

Accepted Answer

Product Status indicates the commercial availability and production stage of the component, such as Active, Not for New Design (NRND), Obsolete, or Last Time Buy (LTB).

Question 9

What is the Current - Max

Accepted Answer

The maximum continuous current a component can safely conduct without exceeding its thermal and electrical limits, typically measured in Amperes (A). This absolute maximum rating defines the upper boundary for reliable operation and is critical for preven

Question 10

What is the Time to Trip

Accepted Answer

Specifies the time delay between the detection of an overcurrent fault condition and the opening of the circuit by a protective device, such as a circuit breaker or fuse. This parameter, typically measured in milliseconds (ms) or seconds (s), defines the

Question 11

What is the Resistance - Initial (Ri) (Min)

Accepted Answer

This parameter specifies the minimum guaranteed electrical resistance value of a component, typically a thermistor or similar sensor, measured under a defined set of initial conditions (e.g., at 25°C with negligible self-heating). It establishes the lower

Question 12

What is the Resistance - Post Trip (R1) (Max)

Accepted Answer

This parameter specifies the maximum allowable resistance of the current-sensing resistor (R1) placed in series with the load after a circuit breaker has tripped and its contacts have opened. It defines the upper limit of the residual resistance in the no

Question 13

What is the Operating Temperature

Accepted Answer

The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the powe

Question 14

What is the Size / Dimension

Accepted Answer

This parameter specifies the physical measurements of a component, typically expressed as length, width, height, and/or diameter in millimeters or inches. It defines the component's spatial footprint, which is critical for mechanical integration, PCB layo

Question 15

What is the Lead Spacing

Accepted Answer

This parameter defines the center-to-center distance between adjacent component leads or terminals, typically measured in millimeters (mm) or inches (in). It is a critical mechanical dimension that determines the component's footprint on a PCB and must ma

Question 16

What is the Approval Agency

Accepted Answer

A designated organization that validates a component's compliance with specific safety, performance, or environmental standards (e.g., UL, CE, CSA). This certification is a mandatory requirement for market access, ensuring the product meets regional regul

Question 17

What is the Current - Hold (Ih) (Max)

Accepted Answer

The maximum value of the minimum current required to maintain a thyristor, TRIAC, or similar latching semiconductor in its conductive state after initial triggering. If the anode or load current falls below this specified threshold, the device will revert

Question 18

What is the Current - Trip (It)

Accepted Answer

Specifies the current level at which a protective device, such as a circuit breaker or fuse, is designed to automatically open its contacts and interrupt the circuit. This threshold is a critical calibration point for overcurrent protection, ensuring down

Question 19

What is the Voltage - Max

Accepted Answer

Specifies the absolute maximum potential difference that can be applied across a component's terminals without risking immediate damage or permanent degradation. This is a critical safety parameter, typically listed under Absolute Maximum Ratings, which d

Question 20

What is the Mounting Type

Accepted Answer

Mounting Type refers to the standardized classification of the method by which an electronic component or module is physically secured and electrically connected to a printed circuit board, chassis, or panel. It defines how the component integrates into t

Question 21

What is the Ratings

Accepted Answer

Ratings specify the absolute maximum and recommended operating limits for electrical, thermal, and environmental conditions, such as voltage, current, power, and temperature. These parameters define the safe operational boundaries and long-term reliabilit

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