To provide an electronic circuit for ignition having durability to storage for a long period, capable of instantaneously distributing power by operating all kinds of switches though it is unnecessary to replace a battery for a long period, protecting a power source even in short-circuit of a power distribution operating device such as a net-expanding gas generator and an electric ignition type explosive device after the ignition and operation, having high transportability by being miniaturized, instantaneously performing the operation, so that the power is instantaneously distributed, for example, to the net-expanding gas generator of a net expansion type crime-prevention tool when the switch is turned on to perform the net expanding operation, and protecting the circuit from overcurrent of the battery even to the short-circuit of the gas generator after power distribution.

This electronic circuit for ignition includes a battery circuit for supplying power for ignition, an ignition circuit operated by the supply of power for ignition, a relay circuit (switch circuit) for communicating the battery circuit with the ignition circuit, and a current limiting circuit for blocking the battery circuit by excess ignition power more than the ignition power, and preventing abnormal heat generation of the battery circuit.

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