SMD code ECs
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, s, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and EC was searched.
149 parts are printed ECs
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.
BZX585-B20SOD-523Zener diode, 2 pins, NexperiaZener diodeSOD-5232 pinsNexperia
- What it is
- Zener diode
- Maker
- Nexperia
- Package
- SOD-523
- Pins
- 2
- Pinout
- 1 cathode
- 2 anode
- Details
- 20 V ±2% voltage regulator (Zener) diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
CPDV15V0-HFSOD-323ESD protection diode, 2 pins, ComchipESD protection diodeSOD-3232 pinsComchip
- What it is
- ESD protection diode
- Maker
- Comchip
- Package
- SOD-323
- Pins
- 2
- Details
- 15 V bidirectional ESD protection diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
ESDA3L15CBSOD-323ESD protection diode, 2 pins, Formosa MicrosemiESD protection diodeSOD-3232 pinsFormosa Microsemi
- What it is
- ESD protection diode
- Maker
- Formosa Microsemi
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
GBLC15CSOD-323ESD protection diode, 2 pins, LeiditechESD protection diodeSOD-3232 pinsLeiditech
- What it is
- ESD protection diode
- Maker
- Leiditech
- Package
- SOD-323
- Pins
- 2
- Details
- ESD protection diode, VRWM 15 V, Cj 0.6 pF
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
GBLC15C-HFSOD-323ESD protection diode, 2 pins, ComchipESD protection diodeSOD-3232 pinsComchip
- What it is
- ESD protection diode
- Maker
- Comchip
- Package
- SOD-323
- Pins
- 2
- Details
- 15 V bidirectional ESD protection diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
GBLC15CISOD-323ESD protection diode, 2 pins, ProTek DevicesESD protection diodeSOD-3232 pinsProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- SOD-323
- Pins
- 2
- Details
- Ultra Low Capacitance TVS Array
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
GSLC15B006SOD-323ESD protection diode, 2 pins, Good-ArkESD protection diodeSOD-3232 pinsGood-Ark
- What it is
- ESD protection diode
- Maker
- Good-Ark
- Package
- SOD-323
- Pins
- 2
- Details
- ESD protection diode, VRWM 15 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
GSMA6J190CASMATVS diode, 2 pins, Good-ArkTVS diodeSMA2 pinsGood-Ark
- What it is
- TVS diode
- Maker
- Good-Ark
- Package
- SMA
- Pins
- 2
- Details
- TVS diode, 600 W
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
GSMMSZ4712TSOD-523Zener diode, 2 pins, Good-ArkZener diodeSOD-5232 pinsGood-Ark
- What it is
- Zener diode
- Maker
- Good-Ark
- Package
- SOD-523
- Pins
- 2
- Details
- Zener diode, VZ 28 V, 0.2 W
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
GSP6SMAFJ190CASMAFTVS diode, 2 pins, Good-ArkTVS diodeSMAF2 pinsGood-Ark
- What it is
- TVS diode
- Maker
- Good-Ark
- Package
- SMAF
- Pins
- 2
- Details
- TVS diode, 600 W
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
LC15CISOD-323ESD protection diode, 2 pins, LeiditechESD protection diodeSOD-3232 pinsLeiditech
- What it is
- ESD protection diode
- Maker
- Leiditech
- Package
- SOD-323
- Pins
- 2
- Details
- ESD protection diode, VRWM 15 V, Cj 1 pF
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
MM3Z5B1SOD-323Zener diode, 2 pins, DiotecZener diodeSOD-3232 pinsDiotec
- What it is
- Zener diode
- Maker
- Diotec
- Package
- SOD-323
- Pins
- 2
- Details
- SMD Planar Zener Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
3 more parts have no package on record
DBTC-12-4-75LX+RF coupler, Mini-CircuitsRF couplerNot recordedNot recordedMini-Circuits
- What it is
- RF coupler
- Maker
- Mini-Circuits
- Package
- Not recorded
- Pins
- Not recorded
- Details
- RF directional coupler, 5-1200 MHz
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: This part.
FDZ1323NZN-channel MOSFET, onsemiN-channel MOSFETNot recordedNot recordedonsemi
- What it is
- N-channel MOSFET
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Common Drain N-Channel 2.5 V PowerTrench WL-CSP MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET.
LFCN-8440+RF filter, Mini-CircuitsRF filterNot recordedNot recordedMini-Circuits
- What it is
- RF filter
- Maker
- Mini-Circuits
- Package
- Not recorded
- Pins
- Not recorded
- Details
- LTCC filter, DC-8440 MHz
- Source
- Manufacturer 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.
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.
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.
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.
N-channel MOSFET
Diode range, part lifted. Test drain to source first, then short gate to source and test again.
Working, it reads
Red probe on the source, black on the drain: about 0.4 to 0.9 V, the body diode. Open the other way. The gate reads open to both other pins, both ways.
Dead, it reads
- Drain to source the same both ways, near 0 V with a continuous beep, and still so after shorting gate to source: shorted. The classic failure.
- The gate reads low to source or drain: gate shorted. Often all three pins end up shorted together.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, so gate to source reads that resistor, which is not a fault. A drain short can be the load. Lift a leg to be sure.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- The diode range can charge the gate enough to turn the part on, and then drain to source reads near 0 both ways on a good part. Short gate to source and test again before you condemn it.
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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