Off-highway electric vehicle powertrain architecture
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Supercharged Solutions to Enhance Safety, Efficiency, and Reliability
Off-highway Electric Vehicle Solutions
Explore key functions and solutions
Littelfuse solutions for off-highway electric vehicles
Fuse
Onboard charger
Contactor relay
TVS Diode Array
TVS Diode
Fuse
Battery + BMS*
DC Power Distribution Module
Fuse Box
High-current Fuse
12 V Battery + PDU**
HVDC Contactor Relay
Fuse
Junction Box
FPO
Off-highway electric vehicles share similar architecture
Agricultural vehicle
Compactor
Snowcat
Mining truck
Universal
motor vehicle
Excavator
Overview
Features & Benefits
Low/High-voltage DC
Legend:
AC input voltage
Onboard charger
Battery pack
+ BMS
12 V battery
+ PDU
Series
DC/DC
converter
Junction
box
AC
compressor
Electric
PTO motor
Traction
motor inverter
Onboard charger
1. Onboard charger
Select technology to see details
AC Fuse
DC Fuse
MOV+ SIDACtor®
GDT
TVS Diode
TVS Diode Array
Si MOSFET or SIC MOSFET
IGBT
Gate Driver
AC Fuse
LC HEV 50A, HC10EV*
Function in application
AC input protection from short circuit and overload condition
Features
Bolt down form factor; high breaking capacity; qualified to ISO 8820 standard
Benefits
Provides safety protection in high-voltage environments; full range fuse
MOV + SIDACtor
GDT
IGBT
Si/SiC MOSFET
Gate Driver
TVS Diode
TVS Diode Array
NTC
Battery Disconnect Switch
®
Gate Driver
Diode
Si/SiC MOSFET
TVS Diode Array
TVS Diode
DC/DC Converter
Fuse
TVS Diode
TVS Diode Array
IGBT
IGBT Module
Gate Driver
Traction motor inverter
Power Distribution Module
†
* BMS: Battery Management System
** PDU: Power Distribution Unit
† HVDC: High Voltage Direct Current
Drive
motor
PTC
heater
Electric
PTO motor
2. Battery pack + BMS
DC Fuse or Specialty Fuse
SMD Fuse
TVS Diode
TVS Diode Array
HVDC Contactor Relays
NTC
Features
Bolt down form factor; fast-acting; high breaking capacity; qualified to ISO 8820 standard
Benefits
Provides safety protection in high-voltage environments; quicker reaction time
Series
SHEV, HC20EV, HC10EV*
Function in application
Short circuit protection and overload circuit protection
DC Fuse or Specialty Fuse
Select technology to see details
3. 12 V battery + PDU
Ignition Switch
High-current Fuse
Fuse Block
TVS Diode
DC Power Distribution Module
Battery Disconnect Switches
Features
Available in broad voltage range up to 48 V; made of rugged engineering grade plastic; UL tested
Benefits
Stands up to mechanical shock and vibration and will not corrode or rust; integrated Deutsch-type socket makes electrical connection quick and easy
Series
95060
Function in application
Activates the main electrical systems for the vehicle
Ignition Switch
Select technology to see details
4. DC/DC converter
Si MOSFET or SiC MOSFET
TVS Diode
Diode
Features
AEC-Q101 qualified; meets ESD protection levels specified under safety standards; low leakage current and clamping voltage
Benefits
Ensures reliability of the equipment without performance degradation
Series
AQ24CANA
Function in application
Protects CAN bus from ESD, EFT, and voltage transient
TVS Diode Array
Select technology to see details
5. Traction motor inverter
TVS Diode (Active clamping)
Discrete IGBT (1200 V, 150 A)
IGBT Module (1200 V, 450 A)
Features
AEC-Q101 qualified; meets ESD protection levels specified under safety standards; low leakage current & clamping voltage
Benefits
Ensures reliability of the equipment without performance degradation
Series
AQ24CANA
Function in application
Protects CAN bus from ESD, EFT and voltage transient
TVS Diode Array
Select technology to see details
6. Junction box
HVDC Contactor Relays
DC output Fuse
Power Distribution Module
Features
Bolt down form factor; fast-acting; high breaking capacity; qualified to ISO 8820 standard
Benefits
Provides safety protection in high-voltage environments; quicker reaction time
Series
526*, 527*, HC10EV*, Mega®70 V, MIDI 70V
Function in application
Short circuit protection and overload circuit protection
DC output Fuse
Select technology to see details
Battery pack
+ BMS
12 V battery
+ PDU
DC/DC
converter
Traction motor inverter
Junction
box
Features
Automotive bolt-down fuse; high interrupt rating; operating temperature -40 ºC to 125 ºC; low on-state resistance
Benefits
Guarantees safe interruption at any voltage; ideal for battery protection
Series
526*, 527*, HC10EV*, Mega®70 V, MIDI 70V
Function in application
DC output protection from short circuit and overload condition
Features
Wide range of surge current ratings, disk sizes, and lead options. Compact design; semiconductor-based solution
Benefits
Provides lower clamping voltage; ensures the reliable performance; no wear out
Series
AUMOV, Pxxx0FNL
Function in application
Protection from lightning and system transient surges
Features
Rugged, low leakage current
Benefits
Safety to the system with high isolation
Series
CG2, CG3
Function in application
Ensures electrical isolation between L-N-G
Features
600 W peak pulse power capability; excellent clamping capability; small footprint
Benefits
Enables compact design; improves system reliability
Series
TPSMB, TPSMC, SZ1SMC, SZ1SMB
Function in application
Protects semiconductor products from transients
Features
AEC-Q101 qualified; meets ESD protection levels specified under safety standard; low leakage current and clamping voltage
Benefits
Ensures reliability of the equipment without performance degradation
Series
AQ24CANA
Function in application
Protects CAN Bus from ESD, EFT, and voltage transient
Features
1.5 A to 30 A peak source/sink drive current; wide operating voltage range; -40 °C to +125 °C; low propagation delay times. Internal charge pump regulator for selectable negative gate drive bias; protection features (UVLO detection and thermal shutdown)
Benefits
Ultra-fast turn-on and turn-off of MOSFET; extremely robust device. Minimizes switching losses; ultra-fast switching speeds; eliminates the need for separate supply
Series
IXD_6xxSI, IX442X, IX4340NE, IX4351NE
Function in application
Efficient switching of MOSFETs and IGBTs
Features
Ultra-low on-resistance RDS(ON) and gate charge Qg; dv/dt ruggedness
Benefits
High efficiency; high power density; easy to mount
Series
X Class, X2 Class, LSIC1MOxx
Function in application
Switches the charge/discharge cycles based on controller feedback
Features
Low VCESAT, low Eon/Eoff; high surge current capability; positive thermal coefficient of VCESAT; short circuit capability
Benefits
Hard-switching capability; high power density; low gate drive requirements
Series
Planar, Trench
Function in application
Switches the charge/discharge cycles based on controller feedback
DC Fuse
MOV+ SIDACtor®
GDT
TVS Diode
Gate Driver
Si MOSFET or SIC MOSFET
IGBT
TVS Diode Array
Features
Tested to new AECQ specifications; fast response to fault current; surface mount device
Benefits
Excellent temperature stability and performance reliability; compact design
Series
438A, 441A
Function in application
Sense line protection
Features
AEC-Q101 qualified; meets ESD protection and in-vehicle transient surge requirement as defined under IEC and ISO safety standards; excellent clamping capability
Benefits
Lowest qualification effort; ensures system reliability
Series
TPSMB, TPSMC, SZ1SMC, SZ1SMB
Function in application
Protects from large current transients in hot-swap application
Features
AEC-Q101 qualified; meets ESD protection levels specified under safety standards; low leakage current and clamping voltage
Benefits
Ensures reliability of the equipment without performance degradation
Series
AQ24CANA
Function in application
Protects CAN bus from ESD, EFT, and voltage transient
Features
Wide range of capabilities–can switch from tens of amperes to thousands of amperes, and tens of volts to thousands of volts
Benefits
Allows a low-voltage signal to switch the contacts for a high-voltage signal
Series
DCNEV, DCNLEV
Function in application
Connect disconnected battery from main circuitry
Features
Custom solutions; small form factor; fast thermal response
Benefits
Provides accurate temperature reading to enable safe device operation
Series
KC, LC, Custom Assembly
Function in application
Temperature monitoring of battery pack during charging and discharging cycles
SMD Fuse
TVS Diode
TVS Diode Array
HVDC Contactor Relays
NTC
Features
Wide rating range up to 600 A; voltage rating: 32 VDC; small footprint
Benefits
Compact design when compared to a traditional solution; integration of the pre-fuse function into the main junction box
Series
ZCase
Function in application
Overcurrent protection for the wire harness
Features
Mega range fuses (40−600 A) can be used in any location; flexible bussing and configurable stud sizes; corrosion-resistant coatings
Benefits
Improved flexibility of design; wide variety of configurations possible; protects fuses from dust and debris
Series
FHZ
Function in application
Fuse holder designed for primary high current power distribution, usually paired with a ZCASE shunt for the input
Features
Uses MINI (280 style) circuit protection component; features multiple cavities creating a high-density fuse module; compact footprint
Benefits
Allows the user to customize their own circuitry; easy to mount; multiple PDMs can be dovetailed together to expand circuit protection capacity
Series
HWB60, HWB18
Function in application
Hard-wired 12 V power distribution module protects and distributes current throughout an application
Features
Current rating 100−500 A; handle and contacts are designed with a unique 360° C operation for activating the switch ON/OFF; waterproof and dustproof
Benefits
Lowers the chances of the battery malfunctioning and protects it against electrical fires and theft
Series
08010100, 08099100
Function in application
Cuts off the connection between a battery and accessories that can drain it
Features
AEC-Q101 qualified; small footprint; meets IEC standards for ESD protection and ISO for in-vehicle transient surges
Benefits
Optimizes board space; lowest qualification effort; ensures system reliability
Series
SLD8S
Function in application
Load dump protection
High-current Fuse
Fuse Block
TVS Diode
DC Power Distribution Module
Battery Disconnect Switches
TVS Diode Array
Gate Driver
Features
AEC-Q101 qualified; meets ESD protection and in-vehicle transient surge requirement as defined under IEC and ISO safety standards; excellent clamping capability
Benefits
Lowest qualification effort; ensures system reliability
Series
TPSMB, SZ1SMB, SZP6SMB
Function in application
Gate driver protection
TVS Diode
Features
AEC-Q101 qualified SMPD packages; low on-resistance RDS(ON) and gate charge Qg
Benefits
High efficiency; high power density; easy to mount
Series
X Class, X2 Class, LSIC1MOxx
Function in application
High-frequency switching and rectification
TVS Diode
Features
1.5A to 30A Peak Source/Sink Drive Current; wide operating voltage range; -40°C to +125°C; low propagation delay times. Internal charge pump regulator for selectable negative gate drive bias; protection features (UVLO detection and thermal shutdown)
Benefits
Ultra-fast turn-on and turn-off of MOSFET; extremely robust device. Minimizes switching losses; ultra-fast switching speeds; eliminates the need for separate supply
Series
IXD_6xxSI, IX442X, IX4340NE, IX4351NE
Function in application
Controls the switching MOSFETs
Features
High surge capability; negligible IRR; Tj 175 °C
Benefits
Reduces switching losses; increases efficiency
Series
DSAxx, LSIC2SD, DHG, DSEI
Function in application
High-frequency switching and rectification
Gate Driver
Si MOSFET or SiC MOSFET
Diode
TVS Diode Array
Gate Driver
Features
AEC-Q101 qualified; meets ESD protection and in-vehicle transient surge requirement as defined under IEC and ISO safety standards; excellent clamping capability
Benefits
Excellent clamping capability; meets automotive standards; fast response time
Series
TPSMB
Function in application
Activates clamping
Features
Rugged XPT design with thin wafer technology
Benefits
Short circuit rated for 10 µsec; low gate charge; low EMI and competitive low VCE(SAT)
Series
MIXA450PF1200TSF
Function in application
Switches applications
Features
1.5 A to 30 A Peak Source/Sink Drive Current; wide operating voltage range; -40 °C to +125 °C; low propagation delay times. Internal charge pump regulator for selectable negative gate drive bias; protection features (UVLO detection and thermal shutdown)
Benefits
Ultra-fast turn-on and turn-off of MOSFET; extremely robust device. Minimizes switching losses; ultra-fast switching speeds; eliminates the need for separate supply
Series
IXD_6xxSI, IX442X, IX4340NE, IX4351NE
Function in application
Controls the switching of IGBTs
Features
Low VCESAT; low Eon/Eoff; high surge current capability; positive thermal coefficient of VCESAT; short circuit capability
Benefits
Hard-switching capability; high power density; low gate drive requirements
Series
Trench XPT, Planar
Function in application
Switches applications
TVS Diode (Active clamping)
Gate Driver
Discrete IGBT (1200 V, 150 A)
IGBT Module (1200 V, 450 A)
Features
Wide range of capabilities – can switch from tens of amperes to thousands of amperes, and tens of volts to thousands of volts
Benefits
Allows a low-voltage signal to switch the contacts for a high voltage signal
Series
DCNEV, DCNLEV
Function in application
Protects the electrical loads operated through the battery
Features
Capability to handle fuse ratings from 23−500 A and voltages up to 70 V; full range of fuses for applications from 12 V−48 V+; user choice of sealing options
Benefits
Robust solution for high corrosion environments
Series
MDB5
Function in application
Main power distribution module protects and distributes current throughout an application
HVDC Contactor Relays
Power Distribution Module
TM
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