The electrostatic sensitivity test of Electric Explosive Devices mainly follows GJB 736.11A-2019 "Test Methods for Pyrotechnic Devices - Part 11: Electrostatic Sensitivity Test for Electric Explosive Devices". The detailed requirements of this standard are as follows:

-       Test Principle: The electrostatic hazard of the human body is simulated by using a capacitor discharge model. The EEDs are subjected to electrostatic discharge tests through specific parameters such as capacitor capacity, discharge resistance, and test voltage, and their response is observed.

-       Key Parameters: When simulating human body tests, the capacitor capacity is 500pF / 2nF, the discharge resistance is 500Ω / 5000Ω, and the test voltage is 30kv. For sensitivity determination tests, the capacitor capacity and discharge resistance are adjustable, and the test voltage is determined by the step method.

-       Equipment Requirements: The total inductance of the electrostatic sensitivity tester should be less than 5μH, the calibration cycle is 12 months, and the leakage voltage control should be ≤ 5% of the charging voltage.

-       Operating Procedure: The sample pre-treatment should be placed in an environment of 15-35℃ for ≥ 2 hours. The connection method is foot-to-foot / foot-to-shell, the lead length is ≤ 200mm ± 20mm, and a dedicated insulating rod should be used for operation. The cross-sectional area of the grounding wire should be ≥ 4mm², and the data recording should be conducted according to the step method as per GJB/Z377A.

-       Safety Protection: A new three-level protection system has been added, including personnel protection (anti-static clothing + insulating shoes + protective glasses combination), equipment protection (10MΩ insulation value + 150kΩ discharge resistance), and environmental protection (independent explosion-proof box + toxic gas exhaust device).

Shanghai Leiditech Electronics has a series of solutions and devices for enhancing electrostatic protection:

-       Protection Method: Leiditech Electronics adopts a "classified protection" strategy, building a protection system from the power supply end to the signal interface. For instance, at the power supply end, for a 10-30V power supply, it is recommended to parallel a small-sized, high-power TVS diode SMBJ33CA between the brown wire and the blue wire. It covers the 10-30V operating range, with a peak pulse power of 400W and a response time of no more than 1ns. At the signal output end, small-sized ESD diodes SD36C can be connected in parallel between the black wire, orange wire and blue wire respectively for electrostatic surge diode protection, covering a power supply voltage of 10-30V, meeting IEC61000-4-2, level 4, contact discharge 30kV, air discharge 30kV.

-       Protective devices: The company offers a variety of types of electrostatic protection components Such as ESD electrostatic protection components (0201/DFN0603/TSSLP-2-4 and other package forms), PESD electrostatic protection components (0201, 0402, 0603 and other package forms), TVS transient voltage suppression diodes (SMF Series, P4SMF Series, SMA Such), TSS semiconductor discharge tubes, GDT ceramic gas discharge tubes, PPTC self-resetting fuses, etc. These devices have different parameters such as voltage, current and power, and can be selected according to specific application scenarios and requirements.