SMD code 27- in SOT-89-5
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.
No part printed 27- is recorded in SOT-89-5
Not sure which one you have?
Answer up to 4 quick questions and these 45 parts are ranked, with a meter test that settles it. It works on a dead part too.
15 parts have no package on record. Nothing rules them out, so they stay.
FDG327NN-channel MOSFET, onsemiN-channel MOSFETNot recordedonsemi
- What it is
- N-channel MOSFET
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- MOSFET - N-Channel, POWERTRENCH
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET.
KDZ27EVZener diode, KECZener diodeNot recordedKEC
- What it is
- Zener diode
- Maker
- KEC
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
RB068L-40Schottky diode, ROHMSchottky diodeNot recordedROHM
- What it is
- Schottky diode
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Schottky Barrier Diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
RB068L-40DDSchottky diode, ROHMSchottky diodeNot recordedROHM
- What it is
- Schottky diode
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Schottky Barrier Diode (AEC-Q101 qualified)
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SGM41106-442O31YXDH4GBattery protection IC, 4 pins, SG MicroBattery protection IC4 pinsSG Micro
- What it is
- Battery protection IC
- Maker
- SG Micro
- Package
- Not recorded
- Pins
- 4
- Details
- Primary Protector and Switch with Shipping Mode for Tiny Li+/Poly Battery
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
SGM48757XUDL6GAnalog switch, 6 pins, SG MicroAnalog switch6 pinsSG Micro
- What it is
- Analog switch
- Maker
- SG Micro
- Package
- Not recorded
- Pins
- 6
- Details
- SPDT 1Ω Analog Switch
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
USFZ27VZener diode, KECZener diodeNot recordedKEC
- What it is
- Zener diode
- Maker
- KEC
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
WAS7227Q-10Analog switch, WillsemiAnalog switchNot recordedWillsemi
- What it is
- Analog switch
- Maker
- Willsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
02DZ2.7XZener diode, ToshibaZener diodeNot recordedToshiba
- What it is
- Zener diode
- Maker
- Toshiba
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Zener diode: 2.50..2.75V, Iz=5mA, Zz=110, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
02DZ2.7ZZener diode, ToshibaZener diodeNot recordedToshiba
- What it is
- Zener diode
- Maker
- Toshiba
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Zener diode: 2.65..2.90V, Iz=5mA, Zz=110, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
BXY42BA-72 pins, InfineonNot recorded2 pinsInfineon
- What it is
- Not recorded
- Maker
- Infineon
- Package
- Not recorded
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: This part.
BZY55-C27Zener diode, Taiwan SemiconductorZener diodeNot recordedTaiwan Semiconductor
- What it is
- Zener diode
- Maker
- Taiwan Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Zener diode: 25.65..28.35V, Izt=5mA, Zzt=80, 500mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CDZ55C27Zener diode, Crownpo TechnologyZener diodeNot recordedCrownpo Technology
- What it is
- Zener diode
- Maker
- Crownpo Technology
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Zener diode: 25.65..28.35V, Zzt=80, Izt=5mA, 500mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CDZ55C27SZener diode, Crownpo TechnologyZener diodeNot recordedCrownpo Technology
- What it is
- Zener diode
- Maker
- Crownpo Technology
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Zener diode: 25.65..28.35V, Zzt=80, Izt=5mA, 500mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CDZ55C27TZener diode, Crownpo TechnologyZener diodeNot recordedCrownpo Technology
- What it is
- Zener diode
- Maker
- Crownpo Technology
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Zener diode: 25.65..28.35V, Zzt=80, Izt=5mA, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
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.
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.
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.
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.
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.
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.
Printed with a code easy to misread as 27-
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes not listed here are printed on 31 more parts.
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