Questions tagged [specifications]

Specifications for an electronic component provide the basis for parametric part selection for operation or optimum performance of a circuit or to prevent damage to integral or connected circuit components.

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579 views

Can MOSFET exceed breakdown voltage without being permanently damaged?

I just have a simple question that I can't find a simple answer to anywhere. Is it possible to exceed the breakdown voltage of a power MOSFET (to short circuit it) without causing permanent damage? ...
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34 views

What does the electrolytic capacitor specification E 9 A 105 CF mean?

What do these electrolytic capacitor specifications mean? E 9 A 105 \$^\circ\$CF Is its maximum temperature 105 Celcius or 105 Farenheit? It has both letters.
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1answer
43 views

What do these forward currents at specified wattages mean?

An LED I'm looking at has various specs listed that I can't make heads nor tails of. It is listed as a "3W LED" supporting a 2.5V minimum and 3.6V voltage. However, "Forward voltage&...
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1answer
512 views

What are the 9V battery terminal size specifications?

I'm trying to find the dimensions of a 9V (PP3?) battery (no specific chemistry). For some reason it's giving me a lot of trouble. I've been able to find most of the information (I checked a bunch of ...
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1answer
89 views

Design a BJT Amplifier to meet all the given specifications( Using LTSPICE)

Given Parameters: 1KHz 10mV sine wave as excitation(Vin) Specifications to be matched: Input Resistance(Rin) = 18 KΩ, Current gain = 33 dB, 3 dB Bandwidth = 425 KHz We are allowed to vary R2,R3( ...
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2answers
122 views

How to get working “specs” of iMac fans from logic board schematics? [closed]

I would like to salvage these three fans They come from an Apple iMac 17-Inch "Core 2 Duo" 2.0 (Late 2006 - iMac5,1 - A1208 - 2114) CPU Fan Apple Service Source P/N: 922-7641 Apple P/N (on ...
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0answers
41 views

Humidity design requirements

I have to design a electronics device that is specified for environmental operating conditions of 0°C to 60°C with 5% to 95% relative humidity (non condensing). I think the temperature part should be ...
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1answer
109 views

Op amp advertised as BW = 105MHz, but GBP is actually 70MHz, what's being spec'd differently?

I just came about an op-amp spec where they say, "the Op-amp X is unity-gain stable with a small-signal unity gain bandwidth of 105MHz.." As you continue to read, it then says, "with a ...
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0answers
136 views

So can we just draw 500 mA from any USB port without enumeration now?

The USB Type-C Spec R2.0 defines the USB Type-C Current feature, in which the power Sink observes the voltage on the CC pin to determine how much current is available from the Source, which falls into ...
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2answers
340 views

I have a solar panel with below specifications. I have some questions

As in picture Vmp = 17.40V and Imp = 0.58A implies Power = 17.40*0.58 ≈ 10W. Does it provide 0.833A (10/12) at 12 volts? What does "Max. System Voltage 800VDC" mean in the picture ?
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77 views

Understanding specifications with regard to current draw of components NL17SZ08, 6N137 and 74HC165 and other current-related questions

I am trying to calculate how much current some components will draw. However, it is not clear to me from the datasheets. I also have several other questions. Firstly, the NL17SZ08 AND gate MAXIMUM ...
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2answers
79 views

Component specifications needed for a high voltage front-end

I have an ADC here that in the datasheet has this example application circuit for a 100 - 240 VAC front end voltage measurement. If I was going to build this circuit, what ratings should my parts ...
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1answer
204 views

What does %FS (Full Scale) represent in load cell?

Lets say that a load cell has these specifications: Rated Load = 500 g Rated output = 1 mV/V Excitation voltage = 12 V Creep = 0.02 %FS / min Then the output range should be 0--12 mV. Does %FS mean ...
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1answer
71 views

Which transistor ratings do I use when calculating something?

Let's say I want to calculate VBE for a transistor (for example). What do I use? VCE (Blocked) or VCE (Saturation) or VCE (max)? Let's say I want to calculate Ic/Ib, what do I use? Ic/Ib (blocked) or ...
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1answer
81 views

What do these diode part numbers mean? [duplicate]

While selecting a diode, I came across these two, which appear to be the same, save the ending part numbers after a "/" (i.e. one is 54, the other 73). I've surmised from JEDEC 609B section ...
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1answer
35 views

Understanding Solid state relay specifications

I've been looking for a solid state relay that can switch 240V from a 3.3V signal. Looking at DigiKey, with a very large selection, I'm not sure how to filter my search (screenshot attached). How do I ...
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1answer
56 views

How do I find op amp specifications regarding voltage limits?

This question is perhaps a bit unusual and is about how to read/interpret specifications. I have been doing some testing with a common difference amp (LM324) and have also used LTSpice to double ...
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0answers
191 views

Use USB-C alternate mode pins for custom signals?

I am working on a product that is made of 2 parts: a host with a male USB-C connector and a device with a female USB-C connector that plugs onto it. The plan is to use USB-C because it's a nice ...
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2answers
36 views

Motor specifications - how to compute allowable running time for power levels between the continuous and peak specs?

Say a motor is rated for 20 N·m continuous torque, and 35 N·m peak (peak = for no more than 30 seconds). Alternatively it may be specified at with continuous/peak currents, but if the motor efficiency ...
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3answers
207 views

Big Muff Pi Black Russian Pots

I try to repair a Big Muff Pi Black Russian, which was assembled in 2001. Unfortunately, I don't understand the labeling of a broken pot. See picture below. Since the device was assembled in Russia, I ...
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1answer
136 views

Wide range Ohmic region Mosfet [closed]

I would like to have a N- Channel (Enhancement mode) MOSFET with wide range of Ohmic region for my project. It's like Vgs varies from 1V to 5V (Ohmic region), Vgs threshold should be >5V, Ids ...
3
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1answer
54 views

Details about Total Access Communication System (TACS)

I'm not sure if this is the right place to ask. I am trying to build a base station for a TACS (Total Access Communication System) phone, but I have not found any detailed document about it. The most ...
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2answers
135 views

How much does voltage affect the light frequency output of an LED?

I have a large array of LEDs that I need to be true to their datasheet light frequency emission (ex 635 nm.) The LEDs require Vtyp @ 20 mA ranging from 2.2 V to 1.2 V. Some are within 0.1 V of each ...
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2answers
571 views

What are the max. overmold dimensions for USB-C plugs?

In contrast to earlier USB specs, the USB-C specification doesn't seem to define a maximum width and height of the overmold part of the plug (according to figure 3.3, there is just a length defined). ...
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3answers
146 views

What does “p-p” mean in a spec sheet?

I've been searching for what these unit abbreviations mean, and can't seem to find anything. I'm hoping for some help. I'm looking at a spec sheet for a Vacuum fluorescent display For the Grid and ...
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1answer
95 views

LED current source safety margin

I have a power LED that requires 600mA at around 25 Volts. Since there are mainly 24 Volts and 36 Volts power supplies available on the market for a reasonable price, I needed to choose a 36 Volts ...
0
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1answer
270 views

Meaning “Colay with mSATA”

In a datasheet of a embedded device (this one in my case) what does it mean that the PCIe bus is conneceted to a socket that says "Full-size Mini-PCIe (colay mSATA)"
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2answers
38 views

Should I look at nominal or max battery voltage for choosing resetable fuse?

I am building a LED/Camera control circuit that is going to be using a 14.8V Li-Ion battery as a supply. I want to put a resettable fuse to prevent short circuits from blowing up too much since this ...
2
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1answer
142 views

What does Bias Repeatability tell me in an IMU's spec sheet?

If there is a standard interpretation of bias repeatability as it applies to a gyroscope, what is that interpretation? This document indicates that it represents the average change in bias between ...
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1answer
84 views

How to determine transistor specification range for voltage and current (in relation to design requirements)

Attached is my current circuit for using a 5V logic output device to control 24V going to a load with max current draw of 14mA. (Ignore the name for transistor Q1, that is just a random NPN BJT). ...
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1answer
25 views

Interpolating output specs on SN74LVC1T45 transceiver

Section 7.5 of the datasheet for the SN74LVC1T45 shows minimum HIGH and maximum LOW voltages for output lines of the chip. Values are given for several different Vcc values (e.g. 2.3V, 3V, 4.5V). ...
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0answers
75 views

What defines the maximum primary current of a (sensor-only) current transformer?

Take the Coilcraft CS1200L for example, which states the sensed current maximum is 35 A. This limit doesn't seem to be defined by the wire size which can fit through the hole (5 mm) as you can pass > ...
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1answer
778 views

Testing spice model for common mode rejection ratio?

I've been trying to create a circuit to simulate common mode rejection ratio of an op amp to test the spice model's accuracy. While I've seen online that being able to use exact resistors only a ...
0
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1answer
147 views

How to infer the max current output of this function generator from its datasheet/specs?

I need to figure out the max current a function generator can output from its signal waveform output. Here is its datasheet. But there is no such parameter here. The output voltage can swing from -...
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0answers
63 views

How to design a 3GHz antenna? [closed]

I would like to design a 3GHz high gain antenna. S11 has to be below -10dB and the gain to be above 9dBi - and I want to make it smaller than 8cm. What kind of antenna is better to satisfy the ...
4
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2answers
45 views

What does cell phone wall adapter specs mean? [closed]

On many (if not all) of my wall charger it says: INPUT: 100-240V / 0.5A OUTPUT: 5V / 2A So, according to my poor knowledge this would mean that the input power ...
0
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1answer
117 views

what is field exitation type of 775 DC motor?

There are different types of field exitation modes. Some of them are Shunt wound series wound and permanent type So, what type of motor is 775 DC motor? i have tried to search the type from ...
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0answers
46 views

Identify relevant parameters of Transformer Spec. for Audio Application

Upon the advice of this question/answer I have added a 1:1 audio isolation transformer to my circuit. I picked up a transformer at the local radio service shop and dropped it into my bread-board ...
0
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1answer
46 views

How to get the continuous current rating of a power led from the spec sheet?

I am looking at an Osram OSLON® Black, SFH 4715A Infared LED. Is this LED rated for continuous operation? The spec sheet lists: Total radiant flux (IF = 1 A, tp = 10 ms) (typ) Φe 770 mW Does the ...
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5answers
179 views

Finding LED specs

I received from a friend a bunch of 1W/3W (??) LED. The thing is, I can't find any specs for them. For sure I have a method to test them and find Vf/If, but is that method any good? I need EE's advice....
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1answer
125 views

Why do commercial components have a temperature range of -40 to 85c?

Why not -50 to 90? How was the temperature range of -40 to 85c chosen to become the industrial standard? (Some products may have a different operating temperature range, but for the majority, the ...
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2answers
419 views

Is diode with forward voltage ~0.15v faulty?

I tested a diode model SB360 PFS which it showed about 0.15 forward voltage. The reverse voltage is zero. Looking the diode specification I read that Vf is 0.49v to 0.68v. So my question is if this ...
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1answer
186 views

Actual Accuracy of an ADC

I checked quite some ADC datasheets and am a bit confused regarding the actual achievable accuracy of an ADC. Let's take this ADC for this example (ADC MCP3422): http://ww1.microchip.com/downloads/en/...
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2answers
1k views

Amperage rating of thermal fuse

Consider this SW-104T thermal fuse. It has a current rating of 10A. Does this mean that in addition to its thermal fuse capabilities (blowing at a certain temperature profile), it also behaves as a ...
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1answer
425 views

Crowbar Circuit for 35V OVP - What parts should I use?

Please excuse my confusion, because I really don't understand what the "150mA max continuous cathode current" means on the datasheet for the LM431. I'm also not sure it'll work in the crowbar circuit ...
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2answers
360 views

Is it safe to measure 220Vrms@50Hz on DSO directly?

I borrowed my friend's DSO to complete my project(Hantek DSO5072), but on scope it says CAT II/400V. So is it safe to measure 220Vrms@50Hz with it?
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1answer
2k views

Why does this microswitch datasheet specify a minimum load current? [duplicate]

The Omron VX series datasheet mentions on page 6 that "Using a model for ordinary loads to open or close the contact of a micro load circuit may result in faulty contact.", and shows that their micro ...
0
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1answer
1k views

How do I specify a low RFI LED driver?

I bought a bunch of very cheap 18W LED lamps. I love them; they look great and the light is excellent, however the drivers throw out a lot of RFI and is interfering with my radio (quite bad at 50MHz, ...
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3answers
433 views

Common-mode voltage outside the specified range

I'm reading the datasheet of TL331. Here a summary of the relevant specification for my question: ...
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2answers
427 views

Why is the Active/Real Power Rating So Low for This Relay?

I'm trying to select a relay for a IoT project that will control a water boiler. I took a look at the HF32F-G relay, but some of the specifications in the datasheet weren't making any sense to me. ...