SMD code SM
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.
6 parts are printed SM
Not sure which one you have?
Answer up to 4 quick questions and these 6 parts are ranked, with a meter test that settles it. It works on a dead part too.
B16WSSOD-323Schottky diode, 2 pins, JSCJSchottky diodeSOD-3232 pinsJSCJ
- What it is
- Schottky diode
- Maker
- JSCJ
- Package
- SOD-323
- Pins
- 2
- Details
- Schottky diode, 60 V, 1 A
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Schottky diode.
BZX84J-B2V7SOD-323Zener diode, 2 pins, NexperiaZener diodeSOD-3232 pinsNexperia
- What it is
- Zener diode
- Maker
- Nexperia
- Package
- SOD-323
- Pins
- 2
- Pinout
- 1 cathode
- 2 anode
- Details
- 2.7 V ±2% voltage regulator (Zener) diode
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Zener diode.
SD101CWSOD-123Schottky diode, 2 pins, VishaySchottky diodeSOD-1232 pinsVishay
- What it is
- Schottky diode
- Maker
- Vishay
- Package
- SOD-123
- Pins
- 2
- Details
- Schottky diode, 40 V, 0.015 A
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Schottky diode.
SD101CW-GSOD-123Schottky diode, 2 pins, VishaySchottky diodeSOD-1232 pinsVishay
- What it is
- Schottky diode
- Maker
- Vishay
- Package
- SOD-123
- Pins
- 2
- Details
- Small Signal Schottky Diodes
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Schottky diode.
SD106WSSOD-323Schottky diode, 2 pins, DiotecSchottky diodeSOD-3232 pinsDiotec
- What it is
- Schottky diode
- Maker
- Diotec
- Package
- SOD-323
- Pins
- 2
- Details
- SMD Schottky Barrier Rectifier Diodes
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Schottky diode.
1 more part has no package on record
BB914InfineonNot recordedNot recordedNot recordedInfineon
- What it is
- Not recorded
- Maker
- Infineon
- Package
- Not recorded
- Pins
- Not recorded
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: This part.
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.
Schottky diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.15 to 0.45 V anode to cathode, roughly half a silicon diode, and open the other way.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- A reading the wrong way round as well: leaky.
- Open both ways: failed open.
- 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 large Schottky can read about 0.1 V forward and beep like a short, and leaks a little the wrong way when good, more when warm. It is shorted only if it reads the same both ways. Measure it cold, beside an identical cold one.
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.
Zener diode
Diode range for the forward check, part lifted, red probe on the anode. A bench supply for the Zener voltage.
Working, it reads
About 0.6 to 0.8 V forward and open in reverse on the diode range. Its Zener voltage shows only on a supply: feed it through a resistor that sets about 5 mA, cathode to positive, read quickly, and it should hold near its rated voltage.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- Open both ways, forward too: failed open.
- Holds well off its rated voltage on the supply test: drifted.
- A soft knee, or a voltage that creeps on the supply test: 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 meter's diode range stops at about 2 to 3 V, so almost every Zener reads open in reverse on it, good or bad; a 3 V meter may just show a 2.4 or 2.7 V part. Above about 3 V the meter cannot tell a Zener from a plain diode.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Printed with a code easy to misread as SM
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes that begin with SM
For a marking with its end worn or burnt off. Each code has a page of its own.
Open this in the search to correct a character or try another package.