Shanghai Jastar Industrial Co., Ltd.
Instant · 7 kW 7,000 W 220 / 240 V 30 – 55 °C OEM / ODM

7 kW Instant Electric Water Heater — Rotary Knob, Stainless Steel or Cast Aluminium

A 7 kW point-of-use heater with a single rotary knob — one control, nothing to mis-set and nothing to break in transit. The element brings water to temperature in about two seconds and holds the outlet between 30–55 °C. Available with a stainless steel cup or a cast aluminium element. No plug: it wires to the 40 A leakage breaker supplied, on 4–6 mm² copper cable.

Model
JS-A3-1
Rated power
7,000 W
Voltage / Frequency
220 / 240 V ~ · 50 / 60 Hz
Heating element
Stainless steel cup or cast aluminium, 7 kW (selectable)
Hot water in
≈ 2 seconds
Temperature range
30 – 55 °C
Control
Rotary knob
Power cable
≥ 4 – 6 mm² copper core
Power connection
No plug · 40 A leakage breaker supplied
Unit size
205 × 68 × 365 mm
Carton
4 pcs · 710 × 420 × 390 mm · 12 kg

MOQ 100 pcs for custom panel colour, pattern and logo · 1,000 pcs for custom packaging. Samples from 1 pc — the sample price is higher than the bulk price, and we refund the difference once you place a bulk order within 30 days of receiving the sample. Prices are quoted per order, EXW Shanghai — tell us your quantity and destination port and we will reply within one working day.

CE RoHS 100% tested before shipment

Why this model

One knob, nothing to mis-set

The mechanical version of the 7 kW body — for markets that still buy on feel.

365 × 205 mm, 12 kg carton of 4

365 × 205 mm, 12 kg carton of 4

A 68 mm-deep body at 365 mm tall. Four pieces to a 12 kg carton keeps the landed cost per unit down and the carton light enough for one person to handle.

7 kW, two seconds

7 kW, two seconds

The element heats only while water flows, so the shower reaches temperature in about two seconds and nothing is stored to run cold between uses.

Protection as standard

Protection as standard

Water and electricity are kept apart inside the body, with over-temperature, dry-heat and leakage protection, plus the 40 A leakage breaker in the box.

Standard two-port layout

Standard two-port layout

Hot and cold both exit at the bottom face and the wiring diagram is printed in the carton — a straight swap for the unit it replaces.

Specifications

Technical data — JS-A3-1

Every unit is pressure-tested and function-tested before packing. Custom panel finish and power connection available for OEM orders.

Electrical & performance
Rated power7,000 W
Rated voltage220 / 240 V ~ · 50 / 60 Hz
Heating elementStainless steel cup or cast aluminium, 7 kW (selectable)
Heating time≈ 2 seconds
Temperature range30 – 55 °C
ControlRotary knob
Power cable≥ 4 – 6 mm² copper core
Power connectionNo plug · wired direct, 40 A leakage breaker supplied
ProtectionWater–electricity separation · Over-temperature protection · Dry-heat protection · Leakage protection
Waterproof ratingIPX4
CertificationCE · RoHS
Water, dimensions & packing
Unit size205 × 68 × 365 mm
Inner box365 × 105 × 405 mm
Net / gross per unit2 kg / 3 kg
Pcs per carton4 pcs
Carton size710 × 420 × 390 mm
Gross weight12 kg
Body colourWhite (custom on request)
LoadingLCL and FCL both available

OEM & ODM

Make it your own brand

We build for importers, wholesalers and own-brand retailers — from a panel colour change to a fully customised product and gift box.

Panel colour, pattern & logo

Body colour and front panel in your colour and pattern, with your logo printed or laser-etched. Artwork proof before mass production.

MOQ 100 pcs

Packaging

Custom printed inner box and master carton, colour or gift box, barcode and retail labelling. Export cartons are drop-tested.

MOQ 1,000 pcs

Voltage & plug standard

Voltage build (110 / 220 / 240 V, AC 380 V for the three-phase unit) and plug standard (EU / US / UK / AU / Africa) matched to your market.

MOQ 100 pcs

Documents & certification

CE and RoHS test reports, product photos, specification sheets and packing lists for your own listings and customs clearance.

Ready to share

Samples & price protection

Test one unit before you commit to a container

Every model is available as a sample, and every price step you reach is paid back to you — the sample itself included.

Samples from 1 pc

Order a single unit to test it, open it up and show your own customers. No minimum quantity, any model in the range, shipped with its CE and RoHS test reports.

MOQ 1 pc

The sample price difference comes back

A single unit is charged above the bulk price, because of one-off handling and air freight. Place a bulk order for the same model within 30 days of receiving the sample and we refund the difference.

30-day rebate

Earlier shipments are rebated too

Our four price tiers — 10–99 / 100–999 / 1,000–9,999 / 10,000+ pcs — are counted cumulatively over the 30 days after you receive the goods. Reach a higher tier and we refund the difference on the units you have already shipped.

Cumulative over 30 days

Tell us which model you want to test and we will send the sample invoice the same working day.

Request a quotation for JS-A3-1

Send us your quantity, destination port and power connection requirements — we will come back with prices and lead time within one working day.

Product Catalog 2026

Browse the full range — instant water heaters, hot water taps and bathroom & desk heaters — in one PDF.