Starter Relay 28300-78020 for DENSO 24V 80A
A 24V 80A-100A starter relay that cross references DENSO 28300-78020 and 182800-3491, fitted to electric vehicles and other commercial vehicle applications. It controls the high current flow from the battery to the starter motor during engine cranking. Supplied in neutral, customised or CHINO branded packaging with a 12 month warranty from B/L date.
MOQ 10 pcs · Free samples, freight at your cost · Neutral or own brand packing · 12 month warranty from B/L date
Key Benefits
- Cross references two DENSO part numbers so one line item covers multiple vehicle builds
- 80A-100A current rating supports high cranking loads in electric and heavy-duty vehicles
- 24V system voltage matches commercial vehicle electrical architecture
- Direct plug-in replacement with no rewiring required at the workshop
- Ships in 7 to 10 working days as a stocked fast-moving item
- Twelve month warranty from B/L date protects distributor shelf stock
Application Scenarios
Where It Is Used
- Fleet workshops replacing starter relays on electric delivery vans after repeated cranking failures
- Aftermarket distributors stocking DENSO cross-references for electric and commercial vehicle fleets
- Repair chains diagnosing engines that fail to crank due to relay contact welding or coil failure
- OEM and ODM buyers integrating the relay into new vehicle builds with DENSO-compatible wiring
Who It Is For
- Truck parts importers who buy against DENSO OEM numbers
- Aftermarket distributors serving electric and commercial vehicle fleets
- Fleet maintenance managers running electric and heavy-duty vehicles
- Auto electrical repair shops that stock relays by current rating and voltage
Problems It Solves
Symptoms on the Vehicle
- Engines that fail to crank due to a failed starter relay with welded contacts or open coil
- Original DENSO relays that are slow to source and expensive through the dealer network
- Mixed vehicle fleets that would otherwise need two separate relay part numbers
- Relays that overheat or fail under high cranking load due to insufficient current rating
Technical Features
- 80A-100A high current switching for reliable engine starting
- 24V commercial vehicle system voltage with stable coil operation
- Solenoid actuated contact system with internal arc suppression
- Sealed assembly suitable for under-hood or cab-mounted relay panels
- Designed for use in electric vehicles and other commercial vehicle applications
Specifications
Only values printed on the original product page are listed. Anything not shown here we confirm in writing before you order.
| OEM No | 28300-78020, 182800-3491 |
|---|---|
| Type | Starter relay |
| Voltage | 24V |
| Current Rating | 80A-100A |
| Application | Electric vehicle and others |
| Place of Origin | Ruian, China |
| MOQ | 10 pcs |
| Delivery Time | 7-10 working days |
| Packing | Neutral, customised or CHINO box |
| Warranty | 12 months since B/L date |
| Certification | ISO 9001:2015 |
Materials and Manufacturing
Materials
- Moulded thermoplastic relay housing
- Copper alloy flat blade terminals
- Solenoid coil with insulated wire
- Silver alloy contact points for high current switching
Quality Control
- 100 percent function test before delivery
- Performance parameters checked in the in-house laboratory
- Component materials sourced from named suppliers under the IATF 16949:2016 documented process
- Production and test steps recorded on video
Manufacturing Process
Terminal stamping and plating
Coil winding and assembly
PCB and contact assembly
Housing moulding
Final assembly and potting
Electrical function test
Customization Options
- Neutral packing with no brand marking
- Customer branded box and barcode label
- CHINO branded retail box
- OEM and ODM builds against a sample or drawing
Compared With the Alternatives
| DENSO dealer original relay | Same fitment and pin pattern at aftermarket pricing, but without the DENSO part number on the box unless you order branded packaging |
|---|---|
| Used or reclaimed relays | New units carry a 12 month warranty from B/L date; reclaimed stock carries none |
Use Guide
- Confirm the vehicle is a 24V system before fitting
- Isolate the battery, unplug the failed relay from the relay panel and fit the replacement in the same orientation
- Test the starter engagement and release before releasing the vehicle
- If the starter continues to run after release, check the ignition switch and relay coil circuit before condemning the relay
Also Listed Under
Questions About This Part
Which vehicles does 28300-78020 fit?
It is listed for electric vehicles and other commercial applications. Send us your chassis number and we will confirm against the original relay before you order.
What is the minimum order quantity?
10 pcs on catalogue items. We also accept small trial orders so you can test the part in your own market first.
How long is delivery?
7 to 10 working days for fast moving items held in stock. Production orders take longer and we confirm the date in writing when the order is placed.
Can I get the parts in my own packaging?
Yes. We supply neutral packing, your own branded box with barcode label, or the CHINO box. Artwork is confirmed before printing.
What warranty do you give?
12 months from the B/L date. If a unit fails within that period we take responsibility when the fault is caused by the part, and we reply to any complaint within 24 hours with a solution within 3 days.
Are samples free?
The sample itself is free of charge. We discuss the freight cost with you before shipping.
How do you control quality?
Every part is function tested before delivery and performance parameters are checked in our own laboratory. Components come from named suppliers and production follows the IATF 16949:2016 documented process.
Related Products
Ask for a Quote on Starter Relay 28300-78020 for DENSO 24V 80A
Send the number printed on your original unit and a photograph of the connector. We confirm the match before you order and send a free sample first.