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ABB CT-ERS.21S Relay · Time relay · ON-delay 2c/o · 24-240 V AC/DC1SVR730100R0300↓ 5% off MRP
BrandABB
CategorySwitchgear
SpecificationRelay · 4 A · 240 V AC
Brand SKU1SVR730100R0300
AvailabilityIn stock · ships in 24h
DeliveryPan-India · 3–7 working days
ABB· In stock
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ABB CT-ERS.21S Relay · Time relay · ON-delay 2c/o · 24-240 V AC/DC

₹10,619/pcincl. GST-5%
₹8,999 + 18% GST · MRP ₹11,150
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💳 30 Day credit facility available launching soon - join waitlist.
₹10,619 /pc incl. GST
Free pan-India delivery

ABB CT-ERS.21S Relay · Time relay · ON-delay 2c/o · 24-240 V AC/DC: Elume price today ₹10,619 per pc incl. GST, 5% below the ₹11,150 MRP. Over the last 30 days it ranged from ₹8,410 on 7 Sep to ₹11,150. The average price across the sellers we track is ₹8,495, ₹2,124 less than here. The lowest tracked seller lists it at ₹8,495, ₹2,124 below it (tell us and we match it).

Price history
Elume price vs the average market price across the sellers we track, day by day. Tap a legend entry to show or hide a line.
9 Jul to 7 Oct
₹11,931₹10,883₹9,836₹8,789₹7,742₹11,150₹10,619₹8,495
9 Jul27 Jul14 Aug1 Sep19 Sep7 Oct
Elume today
₹10,619
Avg market price
₹8,495
MRP
₹11,150
Lowest in view · 10 Aug
₹8,325
Highest in view · 3 Oct
₹11,150
🏷️
100% genuine
Brand-authorised stock with full manufacturer warranty
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GST invoice
Tax invoice on every order · GST billing with tax split
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Pan-India delivery
3–7 working days to any site in India
📦
Wholesale built in
−5% auto-applies at 15+ units - ₹10,088/pc on this product

The CT-ERS.21S is a single-function electronic time relay from the CT-S timer range. It provides an ON-delay (delay on make) function with 10 time ranges from 0.05 s to 300 h. This time relay operates with a rated control supply voltage of 24 - 240 V AC / DC and has a 2 c/o (SPDT) output with contacts rated at 250 V / 4 A. A sealable transparent cover for protection against unauthorized changes is

As published by ABB. Verify critical parameters against the datasheet before specifying.
ABB ABB CT-ERS.21S Relay · Time relay · ON-delay 2c/o · 24-240 V AC/DC · 1SVR730100R0300
Device typeRelay
Rated current4 A
Rated voltage240 V AC
Frequency50 / 60 Hz
Insulation voltage (Ui)Input Circuit / Output Circuit 500 V
Impulse withstand (Uimp)Input Circuit 4 kV
Width1.5 modules (22.5 mm)
Terminal capacityFlexible with Ferrule 1x 0.5 ... 2.5 mm²
Ingress protectionIP50
Reference standardCAN/CSA C22.2 No.14, IEC/EN 63000, IEC/EN 61812-1, UL 508
Net weight0.13 kg
Country of originGermany
Current rating4 A
BrandABB
Brand SKU1SVR730100R0300
ELINE4KGC3M6JR
Sold asPer pc
Ratings as published by ABB (abb.com product data, datasheet 2CDC110004C0210_01; shop.in.abb.com listing for 1SVR730100R0300, 23 Sep 2026; Product name). Verify critical parameters against the datasheet before specifying.
Read: Havells vs ABB vs Lauritz Knudsen: Which Switchgear for Your Home? →
Which is the best MCB brand in India: Havells, ABB or Lauritz Knudsen?
At correct specification, all three protect reliably; they differ in range, price and availability rather than trip-when-needed quality. Havells wins on availability and range breadth, ABB on engineering pedigree, Lauritz Knudsen on premium build at keen prices.
Is Lauritz Knudsen the same as L&T Switchgear?
Yes; it is the renamed erstwhile L&T Switchgear business, continuing the same Indian manufacturing legacy under new ownership and branding. Ranges like Tripper and EXORA carry that lineage forward.
Can I mix MCB brands in one distribution board?
Electrically yes; DIN-rail standards make devices interchangeable, and a mixed board protects correctly if each device is rightly rated. Single-brand boards are still preferable for spares, warranty simplicity and appearance.
Is ABB CT-ERS.21S Relay · Time relay · ON-delay 2c/o · 24-240 V AC/DC genuine and warranty-backed?

Yes. Every ABB product on Elume is 100% genuine, sourced through authorised channels, and carries the manufacturer's standard warranty.

Do you deliver across India?

Yes - we deliver pan-India, usually within 3–7 working days. Delivery is free on orders of ₹4,000 and above; a flat ₹100 fee applies from ₹2,000 to ₹4,000 and ₹200 below ₹2,000.

Can I get a GST invoice?

Yes. Enter your GSTIN at checkout and we issue a GST invoice with tax shown separately, so businesses can claim input tax credit.

Is there a wholesale or bulk rate?

Yes. Orders of 15 or more pcs get a wholesale rate about 5% below the listed Elume price - shown on every product page.

What if I find it cheaper somewhere else?

Tell us. If the same ABB product is listed for less, GST and delivery included, by an authorised Indian online seller, we match that price - before you order or within 7 days of ordering. The terms are on our lowest-price guarantee page.

What is the return policy?

Unused items in original packaging can be returned within 7 days of delivery, with free return shipping.

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