J49/K134 Complementary Power MOSFET Pair: Essential Components for PLC Industrial Automation Systems

23. februar 2026

Historical parts record: Photos and notes below belong to this record. Confirm the offered unit’s full model, condition and available test evidence before ordering.

The J49/K134 delivery contains four pairs of metal-can devices. Their photographed faces read J49 JAPAN 6C3 and K134 JAPAN 6B3, with Hitachi-style logos. This record documents the loose components, their case style and their delivery condition.

Identification and delivery details

Eight devices are laid out together on foam: four of each short marking. Each has a two-hole mounting flange and two long leads insulated in blue at the case. The opposite side views show the metal bases clearly; no assembled amplifier or control board is included in these photographs.

The delivery entry dated 20 October 2025 describes four pairs as new original parts. That is the recorded supply description. Markings and appearance alone do not establish manufacturer authenticity, and the photographs contain no curve-tracer report or measured pair-matching results.

J49 and K134 are the short marks visible on these parts. A replacement decision needs the full part designation and its original drawing, especially where the metal case is an electrical terminal. The earlier article's general PLC language supplies no pin assignment or tested electrical limit.

Photographed markings and delivery record
Item	Evidence
Record	J49/K134
Visible short marks	J49 JAPAN 6C3; K134 JAPAN 6B3
Brand marking	Hitachi-style logos; Japan printed on faces
Quantity	Four pairs / eight individual devices
Package evidence	Metal can; two-hole flange; two insulated leads per device
Recorded condition	New original, in the delivery entry
Delivery date	20 October 2025
Weight field	0.5 kg in the record; no individual device mass measured
Test evidence	No electrical or matching measurements in the photographs

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Matching this part

Compare the face marks, flange spacing, case dimensions and lead arrangement with the part being removed. Keep the two marked types distinct when ordering; eight pieces here means four pairs, rather than eight pairs.

For an amplifier repair, provide the board reference, circuit drawing and required matching criteria. A visual pair is not a measured matched pair. Confirm insulation hardware and case connection before mounting to a heatsink.

Photos and recorded media

Undersides of eight metal-can devices on foam, showing two insulated leads and two mounting holes on each base.

Angled underside view of all eight devices and their long leads.

Four pairs arranged face up: K134 devices read JAPAN 6B3 and J49 devices read JAPAN 6C3.

Second face-up view of the four K134/J49 pairs, with Hitachi-style logos visible.

Overhead underside view of the four pairs, showing lead position and base plates.

Oblique underside view of the eight devices on the foam carrier.

Closer face-up view of the K134 JAPAN 6B3 and J49 JAPAN 6C3 markings.

Compare the separate J56/K176 pair record and INA217 audio amplifier component record.

Request this part

Send the full device designation, photographs of the original part and required pair quantity. KOEED can confirm the available markings and delivery condition against this record.

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