Automotive Transient Immunity Generators

Automotive transient immunity generators are required to meet conducted electrical disturbance immunity standards such as ISO 7637, ISO 16750-2 and others. Generating the electrical transient pulses and, typically using an internal coupler, the automotive transient generators apply waveforms defined it test standards to supply lines and assembli...

Automotive transient immunity generators are required to meet conducted electrical disturbance immunity standards such as ISO 7637, ISO 16750-2 and others. Generating the electrical transient pulses and, typically using an internal coupler, the automotive transient generators apply waveforms defined it test standards to supply lines and assemblies used in cars and other vehicles.



The EMC Shop stocks a wide selection of automotive transient generators from Teseq, EM Test and 3ctest. Rent or buy an automotive transient generator for virtually any international or manufacturer specific test standard requiring immunity testing to electrical disturbances on cars, trucks or industrial vehicles. Software can be easily added and integrated to include additional tests as required.



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Automotive transient generators are typically benchtop, but heavy equipment. When doing testing on three phase power lines systems usually require much larger coupling/decoupling networks which substantially increase system size. EM test environments with ground planes with connections to earth are required to safely use transient generators.

Test Standards Requiring Automotive Transient Generators

Test Setup Diagram - Automotive Transient Immunity Generators



Common Automotive Immunity Pulses

ISO and SAE

Pulse 1. A simulation of transients due to supply disconnection from inductive loads; it applies to a DUT if as used in the vehicle, it remains connected directly in parallel with an inductive load. 

Pulse 2a. Simulates transients due to a sudden interruption of currents in a device connected in parallel with the DUT due to the inductances of the wiring harness.

Pulse 2b. Simulates transients from DC motors acting as generators after the ignition is switched off.

Pulse 3a/3b. Occurs as the result of switching processes. The characteristics of this pulse are influenced by distributed capacitance and inductance of the wiring harness.

Pulse 4. The voltage reduction caused by energizing the starter motor circuits of the internal combustion engines. Pulse 4 variants. Most manufacturer variations of pulse four are generally much more complicated. For example, Ford requires up to four arbitrary generators with four outputs to be perfectly synchronized. 

Pulse 5. Simulation of a load dump transient occurring in the event of a discharged battery being disconnected while the alternator is generating charging current with other loads remaining on the alternator circuit at this moment. Magnetic field immunity. Simulates magnetic fields generated by electric motors, daytime running lamps, etc. for DUTs with magnetically sensitive devices. Transformer coupled sine waves. Sinusoidal noise coupled on battery lines. Often referred to as “ground shift”.

Video 3ctest Automotive Transient Generator

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Automotive Transient Immunity Generators There are 39 products.

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Showing 1 - 12 of 39 items
    • Standalone test generator for voltage dips and interruptions
    • Rise/fall time <1us
    • Electronic short-circuit protection
    • Rated voltage 80V DC
    • Front panel operation
    • Standard Test routines
    • USB and GPIB interfaces
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    • Economic Alternative for Automotive EMC Compliance
    • Meets ISO 7637 Pulses 1, 2a, 3a and 3b
    • Built-in EFT/Burst generator module
    • Built-in Micropulse generator module (ISO 7637, JASO, SAE and NISSAN)
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    • ISO 16750-2 TEST A/B
    • ISO 7637-2 P5a/P5b
    • Generates clipped load dump pulse 
    • internal adjustable source impedance 
    • Pulse duration up to 1200ms (internal resistance more than 2 Ω)
    • Comply with most international standards and car manufacturer standards 
    • Built-in 60V/30A coupler 
    • With the function of current detection and over current protection 
    • Ethernet, RJ 45, PC control

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    • ISO PULSE 6 (12V/24V)
    • GOST PULSE 1B (24V)
    • Standalone test generator 
    • Test Voltage up to 1,100V
    • Includes 30, 50, 100, 150 and 200ohm source impedance
    • Built-in electronic battery switch
    • Built-in CDN 60V/25A DC
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    • Load Dump generator according to ISO 7637, ISO 16750-2, SAE J1113, SAE J1455, JASO, Nissan and most car manufacturer requirements 
    • Generates Clipped Load Dump pulses 
    • Built-in 0.5 - 38 Ohm source impedance, selectable in 0.1 Ohm steps 
    • Pulse duration up to 1,200ms
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    • Most compact equipment for ripple noise on ac/dc supplies and magnetic fields
    • Built-in LF signal generator
    • Built-in LF amplifier
    • Built-in LF transformer 2:
    • Built-in frequency-selective voltage and current meter
    • Built-in load resistors
    • Automatic self-calibration
    • Frequency Range: 10 Hz - 250 kHz
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    • Compliance 5 RF Emissions & Immunity Software:
      • Commercial
      • Military
      • Aerospace
      • Automotive
      • Reverberation Chamber
    • Create Test Reports
    • Over 350 Instruments Supported
    • Modify test procedures, test set-ups and EUT test sequences

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    • Economic Alternative for Automotive EMC Compliance
    • Meets ISO 7637 Pulses 1, 2a, 3a aand 3b
    • Built-in EFT/Burst generator module
    • Built-in Micropulse generator module (ISO 7637, JASO, SAE and NISSAN)
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    • Simulator and power amplifier
    • Up to 60 Volts, 30 Amps
    • ISO 7637-2
    • ISO 16750-2
    • ISO 11452-8
    • Pulse 2b, Pulse 4
    • battery supply simulation and DC voltage source
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    • MT 5511 Micro Transients
    • FT 5531 Fast Transients
    • LD 5550 Load Dump Generator
    • Built-in 100 A coupler/battery switch
    • Contains space for up to three transient modules
    • Supports USB and GPIB
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    • 4-Quadrant – Can source and sink current
    • ±80V – DC supply for 12V to 48V systems; meets 80V surge requirements
    • 300 kHz Sine – DC ripple tests for all major standards
    • 3µS Rise Time – Exceeds surge and dropout slew rate requirements
    • 3mΩ DC Source Impedance – Out-performs ISO 7637-2 requirements
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Showing 1 - 12 of 39 items