SMD code 5Ap

Marking codes are not standardised, and the same code is reused by unrelated makers for unrelated parts. Below is every part in our tables printed with it, and any printed with a code that is easy to misread as it, from the manufacturers' own marking tables and published code lists.

The last letter, p, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and 5A was searched.

132 parts are printed 5Ap

Not sure which one you have?

Answer up to 4 quick questions and these 50 parts are ranked, with a meter test that settles it. It works on a dead part too.

VSMF05LCSOT-953ESD protection diode, 5 pins, ProTek DevicesESD protection diodeSOT-9535 pinsProTek Devices
What it is
ESD protection diode
Maker
ProTek Devices
Package
SOT-953
Pins
5
Details
Multi-Line Low Capacitance TVS Array
Source
Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
Datasheetfor VSMF05LC, opens in a new tab
ESD2510D5V0ADFNESD protection diode, YFWESD protection diodeDFNNot recordedYFW
What it is
ESD protection diode
Maker
YFW
Package
DFN
Pins
Not recorded
Source
Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
Datasheetfor ESD2510D5V0A, opens in a new tab
2SC5938-ASOT-233 pins, Isahaya ElectronicsNot recordedSOT-233 pinsIsahaya Electronics
What it is
Not recorded
Maker
Isahaya Electronics
Package
SOT-23
Pins
3
Details
Si-npn: AF, Sw, 50V, 200mA, 150mW, 30MHz, B=200..700
Source
Published code list
Is it dead? The meter test is below: This part.
2SC5996-ASOT-3233 pins, Isahaya ElectronicsNot recordedSOT-3233 pinsIsahaya Electronics
What it is
Not recorded
Maker
Isahaya Electronics
Package
SOT-323
Pins
3
Details
Si-npn: AF, Sw, 50V, 200mA, 150mW, 30MHz, B=200..700
Source
Published code list
Is it dead? The meter test is below: This part.
74AUP2G16GWSOT-3636 pins, NXPNot recordedSOT-3636 pinsNXP
What it is
Not recorded
Maker
NXP
Package
SOT-363
Pins
6
Details
CMOS logic IC: Dual noniverting buffers
Source
Published code list
Is it dead? The meter test is below: Integrated circuit.
10 more parts have no package on record
- VBUS05B1-SD0ESD protection diode, VishayESD protection diodeNot recordedNot recordedVishay
  What it is
  ESD protection diode
  Maker
  Vishay
  Package
  Not recorded
  Pins
  Not recorded
  Details
  Ultra Low Capacitance Bidirectional Symmetrical (BiSy) Single Line ESD Protection Diode in Silicon Package
  Source
  Manufacturer datasheet
  Is it dead? The meter test is below: TVS or ESD protection diode.
  Datasheetfor VBUS05B1-SD0, opens in a new tab
- VBUS05N1-HD1ESD protection diode, VishayESD protection diodeNot recordedNot recordedVishay
  What it is
  ESD protection diode
  Maker
  Vishay
  Package
  Not recorded
  Pins
  Not recorded
  Details
  Ultra Low Capacitance Unidirectional Single Line ESD Protection Diode in DFN1006-2A
  Source
  Manufacturer datasheet
  Is it dead? The meter test is below: TVS or ESD protection diode.
  Datasheetfor VBUS05N1-HD1, opens in a new tab
- 2SC5557RF transistor, PanasonicRF transistorNot recordedNot recordedPanasonic
  What it is
  RF transistor
  Maker
  Panasonic
  Package
  Not recorded
  Pins
  Not recorded
  Details
  NPN transistor: RF, LN, 9V, 30mA, 100mW, B=100..160, 12.5GHz
  Source
  Published code list
  Is it dead? The meter test is below: Bipolar transistor.
- 74AUP1T00GWNXPNot recordedNot recordedNot recordedNXP
  What it is
  Not recorded
  Maker
  NXP
  Package
  Not recorded
  Pins
  Not recorded
  Details
  CMOS logic IC: 2-input NAND gate with voltage-level translator
  Source
  Published code list
  Is it dead? The meter test is below: Integrated circuit.
- 74AUP1T00GXNXPNot recordedNot recordedNot recordedNXP
  What it is
  Not recorded
  Maker
  NXP
  Package
  Not recorded
  Pins
  Not recorded
  Details
  CMOS logic IC: 2-input NAND gate with voltage-level translator
  Source
  Published code list
  Is it dead? The meter test is below: Integrated circuit.
- 74AUP2G16GFNXPNot recordedNot recordedNot recordedNXP
  What it is
  Not recorded
  Maker
  NXP
  Package
  Not recorded
  Pins
  Not recorded
  Details
  CMOS logic IC: Dual noniverting buffers
  Source
  Published code list
  Is it dead? The meter test is below: Integrated circuit.
- 74AUP2G16GMNXPNot recordedNot recordedNot recordedNXP
  What it is
  Not recorded
  Maker
  NXP
  Package
  Not recorded
  Pins
  Not recorded
  Details
  CMOS logic IC: Dual noniverting buffers
  Source
  Published code list
  Is it dead? The meter test is below: Integrated circuit.
- 74AUP3G16DCNXPNot recordedNot recordedNot recordedNXP
  What it is
  Not recorded
  Maker
  NXP
  Package
  Not recorded
  Pins
  Not recorded
  Details
  CMOS logic IC: Triple buffer
  Source
  Published code list
  Is it dead? The meter test is below: Integrated circuit.
- 74AUP3G16GFNXPNot recordedNot recordedNot recordedNXP
  What it is
  Not recorded
  Maker
  NXP
  Package
  Not recorded
  Pins
  Not recorded
  Details
  CMOS logic IC: Triple buffer
  Source
  Published code list
  Is it dead? The meter test is below: Integrated circuit.
- 74AUP3G16GMNXPNot recordedNot recordedNot recordedNXP
  What it is
  Not recorded
  Maker
  NXP
  Package
  Not recorded
  Pins
  Not recorded
  Details
  CMOS logic IC: Triple buffer
  Source
  Published code list
  Is it dead? The meter test is below: Integrated circuit.

Is it dead? One meter test per kind

Parts of the same kind are tested the same way, so each test is here once. Each part above points to its own.

TVS or ESD protection diode

Diode range, from the protected line to ground, part lifted if you can.

Working, it reads

A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.

Dead, it reads

From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
A reading both ways on a one-way part: leaky.
A one-way part open both ways: failed open.

On the board: , a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
Compare:: The same part on the next line or connector pin is the healthy reading to compare with.
Watch for:: A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.

A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

Bipolar transistor

Diode range, part lifted or its base leg off the pad.

Working, it reads

From the base, one probe colour reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.

Dead, it reads

Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
Only one junction reads, or none: a junction has failed open. It then looks like a diode.
A reading the wrong way round, where it should be open: leaky.

On the board: this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
Compare:: If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
Watch for:: A pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.

A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

This part

Diode range and ohms range, part lifted.

Working, it reads

Depends on what it is. The datasheet, or an identical part, says.

Dead, it reads

Between two pins, the same reading both ways, near 0 V with a continuous beep: shorted.
Open between every pair of pins: failed open, or a part that reads open when working.

On the board: this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
Compare:: If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.

A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

Integrated circuit

Voltage with the board powered; ohms from each pin to ground with it off.

Working, it reads

Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.

Dead, it reads

A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
Supply present, output stuck: failed, or its load has.

On the board:: A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
Compare:: The surest reference is the same IC on a working board, measured pin by pin.
Watch for:: Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.

A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

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