Global Certification
- 2026May.22
- No : W-47/34/2025-IPHW Ministry of Electronics and Information technology IPHW Division
No : W-47/34/2025-IPHW
Ministry of Electronics and Information technology
IPHW Division
*****
Electronics Niketan
6 CGO Complex
Lodhi Road New Delhi-110003
20th May, 2026
Circular
Subject: Series Guidelines for product falling under “IS/IEC 62368 : Part 1: 2023-reg
MeitY has notified the "Migration of standards IS 13252 Part 1: 2020 and IS 616: 2017 to
“IS/IEC 62368 : Part 1 : 2023" vide Gazette Notification S.O. No 4997(E) dated 29th October, 2025.
Accordingly the revised guidelines for formation of series of products falling under the aforesaid
standard are as under:
1. Definition of Product Family
A product family can be defined by the maximum configuration of components / sub-assemblies plus
a description of how the models are constructed from the maximum configuration using these
components and sub-assemblies. All models which are included in the family typically have common
design, construction, parts, or assemblies essential to ensure conformity with applicable
requirements. If a product standard does not define a product family, this definition takes over.
2.Common Criteria Applicable to All Products in a Series
2.1 Maximum Number of Models in a Series
a. A maximum of 10 models can be included in a series for all product categories, unless a higher
limit is specifically prescribed for a particular product category.
b. Number of samples selected for testing from a series shall be one for every ten models. The
worst-case configuration from Safety Design consideration must be selected for testing in all
cases.
2.2 IP Rating
a. All models in a series should have same IP rating.
b. The IP marked on the product has to be tested as per IS/IEC 60529 at BIS recognized
laboratories. No marking is required, if it is not protected.
c. If IP construction is used as safeguard for the product, the safeguard shall be in accordance
with IEC 60529; and the IP code shall be declared in the instruction manual or on the
equipment.
2.3 Enclosure Requirements
a. Enclosure Material and Surface Treatment:
(i) The material of all enclosure forming the fire enclosure, electrical insulation barrier,
or mechanical protection shall be the same across all models in the series.
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(ii) The overall shape and general design of the enclosure (i.e. fundamental form, and
method of joining enclosure components) shall be the similar across all models in
a series. Minor dimensional variations are permitted provided that the safety
distances (creepage/clearance), ventilation restrictiveness, and fire enclosure
integrity are not less favourable than the lead model. Product with worst case
dimension can be tested as the lead model in the series.
(iii) The size and arrangement of ventilation openings in the enclosure shall be the
same or more restrictive than that of the lead model across all models in the series.
b. Apertures for Connectors, Controls and Displays: The design and dimensions of
enclosure apertures provided for connectors, controls, and displays shall maintain the
required creepage and clearance distances to internal live parts and shall not compromise
the fire enclosure integrity relative to the lead model.
c. Position of Buttons and Controls
(i) The change in aesthetics, location / positioning of buttons and controls across models
within a series is permitted, subject to the testing laboratory confirming that the
change in location does not impact safety of the product.
(ii) The laboratory shall specifically verify and mention that the relocated buttons or
controls do not reduce creepage or clearance distances, do not compromise the
enclosure integrity, and do not introduce new risk of inadvertent operation under
foreseeable use conditions.
d. Permitted Variations: Differences in colour, surface finish, and non-structural aesthetic
overlays that do not affect any of the above safety criteria are permitted across models
within the series.
2.4 Class of Construction (Electrical Insulation Class)
a. All models in a series shall be of the same class of construction: Class I (basic insulation
plus protective earth), Class II (double or reinforced insulation, no earth) or Class III
(SELV supply).
2.5 Same Energy Source and Safeguard System
a. All models in a series shall use the same type and sub-type of energy source and safeguard
system.
b. All models in a series must have the same energy source like ES1/ES2/ES3 (Electrical),
PS1/PS2/PS3 (Power), and TS1/TS2/TS3 (Thermal) classifications for all equivalent ports
and functions.
c. All models in a series must maintain the same Energy Source Classifications for all
accessible ports. A model with ES1/PS1 outputs cannot be grouped with a model
containing ES2/PS2 or higher energy levels due to the fundamental change in required
safeguards.
d. Models with active cooling (fans) and passive cooling (heatsinks only) shall not be grouped
in the same series.
e. All models in a series must use same type of safety-critical components such as Y-
capacitors, optocouplers, and varistors (MOV) that serve as basic, supplementary, or
reinforced safeguards (ratings will depend on battery capacity) i.e. If Y-capacitor is used
as protection device, additional series models should also have Y-capacitors as protection
device. The worst-case model needs to be tested.
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f. The following combinations (External Energy Source, mains operated with
Internal Power supply and Battery (internal) operated) shall not be grouped in
the same series:
(i) External Energy Source (Power Adapter / Power Bank / Other Input Devices):
a) A registered power adapter / power bank shall be provided with a power greater
than or equal to the rated power of the product.
b) For devices supporting dynamic power negotiation (e.g., USB-PD, PPS), models
sharing the same maximum negotiated power envelope may be grouped in the
same series. PCB layout and design of the power management and charging
circuit (i.e., the safety-critical circuit interfacing with the external energy
source) shall be the same across all models in the series. The Battery
Management System (BMS) must utilize identical safety-logic parameters
(Over-Voltage Cut-off, Under-Voltage Cut-off, and Thermal Shutdown limits)
across all models to ensure consistent safeguard performance.
(ii) Mains Operated with Internal Power Supply:
a) The mains PCB layout or the SMPS (Switched Mode Power Supply) board layout
must be the same across all models.
b) The power transformer, if applicable, must have the same design and insulation
system.
(iii) Battery (Internal) Operated:
a) Models with different battery capacities may be used in a series, provided that
the lead / representative model is tested with the highest battery capacity.
b) Battery across all models in a series shall be of same chemistry (e.g., Li-ion
and Ni configurations cannot be grouped).
c) For rechargeable batteries, the PCB layout and design of the charging and
battery protection circuit shall be the same across all models in the series.
d) In case of non-rechargeable battery also the PCB layout and design shall be the
same across all models in the series.
g. All models in the series shall have the same rated input voltage.
h. In cases where an external energy source is not supplied with the product, the
specifications and ratings of the external energy source (e.g., power adapter, power bank,
etc.) shall be clearly stated on the product/packaging/e-labelling/product-manual.
2.6 Other Form Factors, wherever applicable:
All product models in a series should have -
a. Same Form factors, e.g. in case of HDDs, SDDs.
b. Same type of Microphone and Earphone, e.g. Clip-type, Hand-held, Over-the-ear etc.
c. Same type of charging (Docking/Contact Charging, USB / Charging Case / wireless etc.).
d. Smart Watches with/without SIM to be in different series.
e. Devices with/without display to be in different series.
f. Devices with-touch or without-touch, to be in different series.
g. Same number of output ratings, number of outputs, component ratings, wherever
applicable, e.g. in case of SMPS, Power adaptor with multiple output ports.
h. Same frequency and number of phases at Input/Output and same bus voltage, e.g. in
UPS Inverters.
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i. Same largest paper size in machines, if applicable, e.g. in Copying machines.
j. Same type of display (LCD, LED etc.), if applicable.
k. The IP ratings of the transmitter and receiver to be same e.g. in Wireless Microphone
l. Same type of mounting, e.g. Handheld, Tripod wherever applicable, of Video cameras.
m. Multiple processors can be used in a series, the lead model selected for testing must be
the configuration with the highest Thermal Design Power (TDP) in Watts to represent the
worst-case thermal load on the enclosure and power circuitry.
n. Multiple processors can be used in a product if they are within the same enclosure of
product.
Note:
1. For Power Adapters, UPS/Inverters and Power Banks devices up to a range of output
power/capacity rating can be clubbed in a series.
2. All the components which are notified under the Order and are used in the finished notified
products must be independently registered under CRO.
(Saurabh Ranjan)
Scientist ‘D’
Tel: 011-24301229
Email: Saurabh.r@gov.in
To
1. Bureau of Indian Standards
2. Website of MeitY
3. Industry Association in Electronic sector
