Product categories · Malaysia

DB boxes for Malaysian homes: ways, metal or plastic, single or three-phase, and what each brand's board offers

The distribution board, or “DB box”, is the enclosure that holds a home’s main switch, RCCBs, MCBs, RCBOs and any SPD. “DB box rumah” is one of the most asked topics in Malaysian electrical groups, usually because an aircond installer or a new-house inspector has said the board is too small or too old. Our DB upgrade guide covers whether you need a new board at all. This page covers the box itself: how big, which material and which features to ask for.

The protection is in the devices, not the box. An MCB protects each circuit’s cable, an RCCB or RCBO protects against earth leakage, and an SPD diverts surges. The enclosure has to hold them safely, give each a place on a DIN rail, and provide the neutral and earth bars the circuits connect to.

Count modules, not “ways”

DIN-rail devices are measured in 18mm modules. A 1-pole MCB takes one module, a 2-pole RCCB or main switch takes two, a 4-pole RCCB four. RCBOs and SPDs vary: Maxguard’s ML32-1 RCBO is one module, Hager’s 1P+N AD9 RCBOs are two, and Schneider’s 1P+N iPRD SPD is 36mm, two modules. Check each device’s width on its family page or datasheet.

Sellers usually say “ways”. On a single-phase board, one way is usually one module. On a three-phase board, a “way” can mean one outgoing position on each of the three phases: Maxguard’s DB9WTPS32, for example, is “9 ways” with 27 modules. Some plastic consumer units are sold in half ways, such as Maxguard’s “15.5-way” MG1550N.

A worked example for a single-phase terrace house, using the device widths above:

Device	Modules
2-pole main switch	2
SPD 1P+N (if fitted)	2
2 RCCBs, 2-pole (one 30mA for sockets, one 100mA for lights and fans)	4
2 water heaters: a 10mA RCBO each, or a 10mA RCCB plus an MCB each	2–6
12 MCBs (lights, fans, sockets, 3 airconds)	12
Total	22–26

A single-row 22-way board would be full on day one, and a 27-way one nearly so. Members of the electrical groups advise leaving spare ways for future circuits, so for this house a two-row 36-module board or a three-row 36–39 leaves room for an extra aircond circuit or an EV charger later. This is an illustration, not a design: the circuit list, the RCCB grouping and the cable sizes come from the wireman.

Single-phase or three-phase

A three-phase board has a 4-pole main switch, usually a 4-pole whole-board RCCB, and distributes the circuits over the three phases; the 30mA and 10mA groups further down can be 2-pole devices on one phase each. Boards are sold as SPN (single-phase and neutral) or TPN (three-phase and neutral). Hager’s IU and golf boards and Schneider’s enclosures are just modular enclosures: whether they become single- or three-phase depends on the devices and busbars fitted. Maxguard’s ready-to-use boards are sold as SPN or TPN with the incomer already fitted. Whether a house should go three-phase is a separate decision; see our single vs three-phase guide.

Metal or plastic

Malaysian sellers and wiremen call these “DB besi” or “metalclad” and “DB PVC” or “DB plastik”. In the groups, metalclad is the more expensive option. One member wrote that a single-phase metalclad board job usually costs RM1,000 or more, while another itemised a plastic box at about RM35. One contractor’s price list adds about RM200 for a metal-clad box.

What the manufacturers’ own data shows:

Metal boards are protection class I: the steel box has to be earthed, which ST’s guideline requires for exposed metal parts. Maxguard’s metalclad boards are 1.0–1.5mm mild steel, IP30; Hager’s IU boards are steel, IP40, IK05.
Plastic boards: Hager golf and Schneider PrismaSeT XS (and the Easy9 boxes) are stated as class II, double insulated. Schneider’s Resi9 MP pages and Maxguard’s catalogue don’t state a class for their plastic units. On paper the plastic boards have higher impact ratings than the IU: golf and Resi9 MP are IK07, PrismaSeT XS IK09.
Fire behaviour of plastic depends on the material. Hager and Schneider give a glow-wire test temperature (650°C, or 750°C for most Resi9 MP flush boxes). Maxguard sells standard high-impact polystyrene units (MG…N) and fire-retardant ones (MG…FR, to IEC 60695-2-11), and its catalogue “strongly advise[s]” the fire-retardant type.

A “PVC DB” label from a seller doesn’t tell you the resin: some plastic boxes are polystyrene or ABS. Material is one consideration among several, and well-made terminations matter at least as much.

Surface or flush, and the IP rating

Surface boards mount on the wall; flush (“conceal”, “recessed”) boards sit in a recess, so they suit new builds and renovations where the wall can be cut. Hager golf (VS surface, VF flush) and Schneider Resi9 MP come in both. Hager IU and PrismaSeT XS are surface only, Maxguard’s MG plastic units are surface-mounted, and Maxguard’s catalogue shows no flush version of its metal boards.

Indoor boards on these lists are IP30 (Maxguard metal) or IP40 (Hager, Schneider). IP40 keeps out objects down to 1mm; neither rating is meant for rain. For a board outdoors or in a wet area, Hager Malaysia lists IP65 “vector” enclosures, and other brands have weatherproof ones.

Neutral and earth bars, busbars and cable entry

Each RCCB group needs its own neutral bar: if the neutrals behind a 30mA socket RCCB mix with those behind a 100mA lighting RCCB, the RCCBs can trip for no obvious reason. Before buying, count:

neutral bars: Hager’s IU leaflet shows one neutral bar per row on most models (IU39S: three 13-way bars). Maxguard’s drawings show an earth link and two neutral links on most of its empty single-phase boards (DB1018E: 10-way earth, two 6-way neutral), but only one neutral link on its ready-to-use boards. Schneider’s Resi9 MP has one earth and one neutral block on most models.
terminals: one per circuit, plus feeds, the SPD and the box’s own earth bond. Earth links can be shorter than the way count: Maxguard’s DB1014E has a 6-way earth link for 14 ways.
busbars: Maxguard’s empty boards come “without components, wiring and busbar”, so a comb busbar or links are extra. Its ready-to-use boards come wired with a busbar.
cable entry: where the TNB tails and the circuit cables come in (top, bottom, rear knock-outs). In one group thread, members advised bringing the incoming cable in from the top for an easier connection. Entry matters most when replacing an old board on the same wall.

Empty enclosure or ready-to-use set

Maxguard sells ready-to-use metal boards fitted with an incomer (switchfuse, MCB or MCCB), an RCCB, busbar and wiring. Marketplace stores also sell “DB full set” bundles of a box, main switch, RCCB and MCBs. Two things to check on either:

The RCCB is usually the whole-board 100mA (single-phase) or 300mA (three-phase) device. Maxguard’s sets have a 40A or 63A 100mA RCCB on single-phase boards and 300mA on three-phase. Malaysian rules require 30mA for socket circuits and 10mA for water heaters, so you’ll need further RCCBs or RCBOs downstream, and with them extra neutral bars: Maxguard’s ready-to-use boards show a single neutral link. The RCCB page explains the sensitivities.
The RCCB’s current rating must be at least the incomer’s. ST’s guideline requires it; Maxguard’s 32A sets use a 40A RCCB, which meets it.

What ST’s guideline says

The Energy Commission’s domestic wiring guideline requires distribution boards to be based on MS IEC 60670, with the main switch at a height an adult can reach easily (section 6.2(d)). It also requires downstream RCDs to be rated at least as high as the nearest upstream breaker, sets minimum main-cable sizes by main-breaker rating (10mm² up to 40A, 16mm² up to 63A, 25mm² up to 100A), and requires installations above 100A to be designed by a registered consulting engineer or an ST-registered electrical contractor.

Of the five ranges below, only Schneider’s cite IEC 60670 (parts 1 and 24). Hager’s IU leaflet cites IEC 61439-3, its golf brochure IEC 60439-3, and Maxguard’s catalogue IEC 60439-3, the older assembly standard. If an inspector or consultant asks for MS IEC 60670, ask the supplier for the document. The RCCBs, RCBOs and MCBs inside need ST-SIRIM approval; we didn’t find DB enclosures named in ST’s equipment-approval guideline (GP/ST/No.37/2024).

The boards on Malaysian lists

As of 8 October 2026:

Range	Material, mounting	Sizes	Notes
Maxguard DB enclosures	Steel (IP30) or polystyrene; no flush version listed	Plastic 8–54 ways; metal 10–176 ways	Empty boxes and ready-to-use SPN/TPN boards with incomer and RCCB
Hager IU	Steel, IP40, class I; surface	13-wide 1–5 rows, 18-wide 1–6 rows	One neutral bar per row on most sizes; three MCCB-incomer versions
Hager golf	Plastic, IP40, class II; flush or surface	8–72 modules	Transparent-door versions marked spare part
Schneider Resi9 MP	Plastic, IP40, IK07; flush or surface	4–36 modules surface, 4–54 flush	White or translucent door
Schneider PrismaSeT XS	Plastic (24-wide: metal back and door), IP40, IK09; surface	13–144 modules	Up to 125A; no Malaysian seller found

Other brands are widely sold in Malaysia but not researched here as families: Kozuka KU metal boxes, EPS, GEB, Davis, Tham Chee and others. Hager Malaysia also lists icos (small transparent-door surface boxes), vega (18-wide surface boards, white or transparent door, filed under “up to 160 A”) and vector (IP65).

What they cost

Marketplace listings on BigGo Malaysia, 8 October 2026, for the empty enclosure only:

Maxguard metalclad, at TOP Electrical Store (Selangor, Shopee): DB1018E (18 ways) RM157, DB2036E (2 rows, 36 ways) RM280, DB3045E (3 rows, 45) RM324.50, DB354N (3 rows, 54) RM439. Good Luck Electrical Trading listed the codes it shares with TOP at the same prices.
Hager IU: IU26S RM196–299 across nine listings, IU39S RM354–441 across six.
Hager golf: one Penang store lists VF212PM (24 modules, flush) at RM204.65 and VF218PM (36, flush) at RM339.40. The same store has IU36S (36, steel) at RM257.94.
Schneider Resi9 MP: one Selangor store listed MIP12118 (18 modules) at RM176.89; the other listings we found were from overseas sellers.
Kozuka KU metal boxes, for comparison: KU-313/39 (3 rows, 39) RM160–197.

“Full set” DB bundles with main switch, RCCB and MCBs ran from about RM128 for an 8.5-way 40A set (TM Electrical, Pahang) and RM195 for an EPS 15-way plastic set (Earth Store, Penang) to RM700–800 for a 30-way metal set, and up to RM1,388 for some options of a Hager 26-way metal set. Labour is extra: in one 2026 thread, wiremen answered RM250 for a 16-way single-phase board (Johor Bahru) and RM350–450 for a two-row one when the owner supplies the parts; the DB upgrade guide has more quotes. A listing shows what a seller advertises, not confirmed stock.

What to ask for

Give the seller or wireman the exact code (IU39S, DB232N, MIP12312), not “3 row DB box”. Check:

the number of modules you need now, plus spare ways;
single-phase or three-phase, and the incomer rating;
how many neutral bars, and enough earth terminals;
surface or flush, and the width and height that fit your wall;
metal (earthed) or plastic, and for plastic, a fire-retardant type;
for a set, the RCCB’s sensitivity and rating, and what still needs adding for 30mA sockets and 10mA water heaters.

DB boxes for Malaysian homes: ways, metal or plastic, single or three-phase, and what each brand's board offers

Count modules, not “ways”

Single-phase or three-phase

Metal or plastic

Surface or flush, and the IP rating

Neutral and earth bars, busbars and cable entry

Empty enclosure or ready-to-use set

What ST’s guideline says

The boards on Malaysian lists

What they cost

What to ask for

Ranges across brands

Hager golf plastic enclosures (Malaysia)

Hager IU metal enclosures (Malaysia)

Maxguard distribution boards and consumer units

Schneider PrismaSeT XS enclosures

Schneider Resi9 MP (Mini Pragma) enclosures

Suppliers in this directory

Suppliers and locations

Count modules, not “ways”

Single-phase or three-phase

Metal or plastic

Surface or flush, and the IP rating

Neutral and earth bars, busbars and cable entry

Empty enclosure or ready-to-use set

What ST’s guideline says

The boards on Malaysian lists

What they cost

What to ask for

Ranges across brands

Suppliers in this directory

Suppliers and locations

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