FJA13009 bipolar transistor — Specifications & Equivalents

About the FJA13009

The FJA13009 is an NPN bipolar transistor with a collector–emitter voltage (V_CEO) rating of 400 V, a continuous collector current (I_C) of 12 A and a DC current gain (h_FE) of minimum 8. It can dissipate up to 130 W. It is supplied in the TO3PN package.

At a glance

• Type: NPN bipolar transistor
• Max collector–emitter voltage (V_CEO): 400 V
• Max collector current (I_C): 12 A
• DC current gain (h_FE): minimum 8
• Power dissipation (P_D): 130 W
• Package: TO3PN

Typical applications

Judging from its ratings the FJA13009 is generally applied in power output and driver stages and high-voltage switching such as offline converters and lamp drivers.

The quoted current gain of minimum 8 determines the base drive needed: divide your target collector current by the minimum h_FE, not the typical figure, when sizing the base resistor.

Biasing and absolute maximum ratings

Absolute-maximum breakdown limits are V_CEO 400 V, V_CBO 700 V and V_EBO 9 V (magnitudes). The emitter–base rating is the easiest to overlook and is often only a few volts, so protect the junction against reverse drive.

Dissipation is capped at 130 W, and that figure assumes the datasheet's mounting and ambient conditions — derate it for your own thermal design.

Choosing a replacement for the FJA13009

A drop-in substitute for the FJA13009 must be the same NPN type and offer a collector–emitter rating of at least 400 V, a collector current rating of at least 12 A and current gain in the same ballpark as minimum 8.

Mechanically, check the replacement against the TO3PN footprint and confirm the pin order — parts sharing a package outline do not always share a pinout.

Where the application switches inductive loads or runs near the voltage limit, keep extra headroom rather than choosing a part that only just meets the original numbers.

Frequently asked questions

What is the FJA13009?

The FJA13009 is an NPN bipolar junction transistor (BJT). It is rated for 400 V collector-emitter and 12 A continuous collector current.

What is the maximum voltage of the FJA13009?

Maximum collector-emitter voltage (Vceo) is 400 V, and collector-base (Vcbo) is 700 V.

How much current can the FJA13009 handle?

Continuous collector current is rated at 12 A, with dissipation limited to 130 W.

What is the hFE of the FJA13009?

DC current gain (hFE) is quoted as minimum 8. Size base drive from the minimum value so the transistor saturates fully across production spread.

What package does the FJA13009 come in?

It is listed in TO3PN. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the FJA13009?

This page lists 17 candidate equivalents matched on electrical ratings and package. Any replacement should meet or exceed the original voltage, current and dissipation figures and use a compatible drive level.