LV 123 / LV 148
LV 123 and LV 148 Automotive Voltage Testing
Bidirectional DC supply spanning 0–800 V with ripple superposition and millisecond profile sequencing for HV work; 0–70 V with programmable milliohm output impedance for 48 V board-net work.
This standard turns on
- voltage-class bands
- bidirectional source/sink
- millisecond profile sequencing
And says nothing about
- 400 Hz
- harmonic immunity
- grid conformance
Cited limits
Every value carries the clause, table or figure it comes from.
| Parameter | Value | Clause |
|---|---|---|
| HV_1 unlimited operating | 90–190 V | LV123 voltage classes |
| HV_2a unlimited operating | 170–340 V | LV123 voltage classes |
| HV_2b unlimited operating | 250–450 V | LV123 voltage classes |
| HV_3 unlimited operating | 520–750 V (circuit limit 800 V pk) | LV123 voltage classes |
| Overvoltage pulse slew | max 20 V/ms | LV123 §10.4 |
| LV148 unrestricted operating | 36–52 V | VDA 320 |
| LV148 transient overvoltage | 70 V for 40 ms | E48-02 |
| LV148 long-term overvoltage | 60 V for 60 min | VDA 320 |
| LV148 source impedance | 10–100 mΩ | VDA 320 |
Further reading
- AQG 324 and SiC Modules: When the Named Guideline Does Not Cover Your Device3 min · 18 cited facts
- The Battery Tester Voltage Window: Bought for 1500 V, Caught Out at 36 V5 min · 29 cited facts
- High-Current Battery Testing: The Joint Fails Before the 8,000A Supply5 min · 15 cited facts
- ISO 16750-2: The Code Letter Is the Specification, Not the Voltage4 min · 55 cited facts
- 48 V and 800 V Answer to Different Documents, Not Just Different Voltages5 min · 56 cited facts
- LV 123 and LV 148: Testing Across the Voltage Window, Not Just at Nominal3 min · 22 cited facts
Specifying a system for this standard?
Send us the clauses you have to satisfy. We will come back with the source and load capability that covers them.
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