SMD code K07
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.
K07 on a chip resistor
70 Ω
70 Ω resistor
The K is both the decimal point and the multiplier: 70 Ω.
Check it with a meter
Lift one end and measure across it. A good one reads 70 Ω. Measuring it in circuit reads the parallel combination of everything around it, which is almost always lower, never higher: well above 70 Ω on the board is a fault. Open, or well above 70 Ω, means it has failed: burnt, cracked or corroded. That does not change what to fit: the marking still says 70 Ω. A burnt resistor usually means the part it feeds drew too much, so find that before fitting a new one.
On a transistor or diode body (USP-6C, SOT-23, SOT-23-5), K07 is a part code instead. Those parts are listed below.
2 parts are printed K07
Not sure which one you have?
Answer up to 4 quick questions and these 2 parts are ranked, with a meter test that settles it. It works on a dead part too.
6 pins. What differs:
SM2607CSCSOT-23-6Complementary MOSFET pair (N-channel and P-channel), Sinopower SemiconductorComplementary MOSFET pair (N-channel and P-channel)SOT-23-6Sinopower Semiconductor
- What it is
- Complementary MOSFET pair (N-channel and P-channel)
- Maker
- Sinopower Semiconductor
- Package
- SOT-23-6
- Pins
- 6
- Details
- 20 V, 3.3 A complementary N+P MOSFET pair
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET pair.
TLC363C20V8SOT-363Zener diode, Diodes IncorporatedZener diodeSOT-363Diodes Incorporated
- What it is
- Zener diode
- Maker
- Diodes Incorporated
- Package
- SOT-363
- Pins
- 6
- Details
- Z-diode: Triple, 20V±5%, 200mW, Bidirectional
- 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.
MOSFET pair
Diode range, part lifted. Test drain to source first, then short gate to source and test again. Test each MOSFET on its own pins, as the datasheet's pinout gives them.
Working, it reads
One way between drain and source reads about 0.4 to 0.9 V, the body diode, and the other way open. The gate reads open to both other pins.
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.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, which reads as that resistor and is not a fault. 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.
Printed with a code easy to misread as K07
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
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