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STT Singapore 1 to 3 (Defu campus)

Singapore, Singapore · Singapore market · location approximate to district level

Also listed as STT Defu 1, STT Defu 2, STT Defu 3 and STT Singapore Defu campus.

STT Singapore 1 to 3 (Defu campus) is a data center project in Singapore, operated by ST Telemedia Global Data Centres. It is operational. It is planned for 40 MW of IT load. The operator reports 40 MW running.

Latest change on record: moved to operational on 17 August 2022.

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Stage
Operational
Planned IT load
40 MW
Running now
40 MW
Operator
ST Telemedia Global Data Centres
Colocation
AI workloads
No signal either way
Evidence grade
Verified
Will it get built?Built7 of 7 gates passed
✓ Land secured✓ Power arranged✓ Approvals granted✓ Money committed✓ Tenant or own use✓ Builder appointed✓ Construction started

Build odds is ArusGrid's reading of the public record, not a forecast, a rating or advice. It counts the gates this project has passed in public sources. Private progress does not show, a passed gate can be undone, and projects that pass every gate still stop. The method has not yet been tested against outcomes. How it works.

How Singapore approves, powers and taxes data centers is on Data center rules in Singapore.

How well evidenced is it

Running capacity. The site is operational or expanding. On record: named funder, dated, sized phase, three or more sources, dated source in the last 24 months. Criteria.

AI workloads

StatusNo signal either way

no cooling/density/tenant signal published

Access to AI chips

GradeNo US licence required

This country carries no US destination-based licence requirement for advanced AI chips as the rules are enforced today. Access is a commercial matter between the project and its vendors. Criteria.

Phases

Defu 1 · Operational13 MW, target 2016
Defu 2 · Operational13 MW, target 2018
Defu 3 · Operational15 MW, target 2022

Stage history

2021-04Under construction · datacenterdynamics.com
2022-08-17Operational · datacenterdynamics.com

Who is behind it

OperatorST Telemedia Global Data Centres · Colocation
Funder, EquityKKR
Funder, EquitySingtel

Who uses the compute

Checked on 2026-10-01. No user of this capacity is on the public record. ArusGrid read the operator's releases, the landlord's and contractors' exchange filings, regulator and lender documents and interconnection records. Most colocation leases are confidential, so this says nothing about occupancy.

Platform deals that include it

STT GDC S$1.75B raise (KKR-led + Singtel)
Platform capital, 2024-06US$1.3bn
KKR + Singtel acquisition of STT GDC (platform M&A)
Platform acquisition, 2026-09-01US$5.1bn

Platform capital spans several sites. It is never added to this project's own figure.

Project team
Engineering consultantHDR · Feb 2020 · completed Confirmed source ↗
Multidisciplinary consultant for all buildings at the Defu campus, giving design and project management consultancy from site acquisition through final commissioning and handover. Named for Defu 1 and Defu 2.
Power supply
Dedicated substation22kV · May 2025 Confirmed source ↗
STT Singapore 1 (21 Defu Ave 1): two diverse, redundant 22kV utility supplies and substations; 2N DRUPS; 36h backup fuel at full load; up to 13MW IT
Power allocation or planSembcorp Power Pte Ltd · 100 MW · Oct 2023 Reported source ↗
Not stated as renewable. · Long-term PPAs signed in February and May 2023 with STT GDC subsidiaries to power its Singapore data centres. Up to 100MW over 8 to 10 years. Sites are not named, so this is platform level. · Covers the operator's wider portfolio in this country, not this site alone.
Dedicated substation22kV · May 2025 Confirmed source ↗
STT Singapore 2 (23 Defu Ave 1): four diverse, redundant 22kV utility supplies and substations, up to 12MW IT load.
Water and cooling
WaterMains drinking water · PUB domestic supply; NEWater pipework readiness Confirmed source ↗
2 x 300,000 L make-up water tanks
CoolingWater-cooled chillers · design PUE 1.4 Confirmed source ↗
STT Singapore 1 (21 Defu Ave 1): 2N chilled water plant with 2N cooling towers, CRAH
CoolingWater-cooled chillers · design PUE 1.4 Confirmed source ↗
2N chilled water plant with 2N cooling towers, chilled-water buffer tank (>=5 min full load), 2N piping loops, dual-coil CRAH (STT Singapore 1)

Sources

  1. datacenternews.asia
  2. sttelemediagdc.com
  3. KKR-Singtel Consortium Completes Acquisition of STTGDC; Company Launches Refreshed Global Brand for Next Phase of Growth (STT GDC via Access Newswire, 2026-09-01)
  4. KKR-Led Consortium with Singtel Group to Fully Acquire ST Telemedia Global Data Centres at S$13.8 Billion Enterprise Value (STT GDC, 2026-02-04)
  5. Singapore data centres (STT GDC)
  6. STT GDC opens third building at Defu campus in Singapore (DatacenterDynamics, 2022-08-17)
  7. STT Singapore 1 Factsheet (STT GDC, 2025-05)
  8. STT GDC operationalises third data centre at its Defu campus (iTnews Asia, 2022-08-19)
  9. STT GDC building new 15MW data center in Singapore (DCD, 2021-04-08)
  10. Defu Data Centre Campus (HDR, 2020-02-12)
  11. Sembcorp signs long-term power purchase agreements with ST Telemedia Global Data Centres (The Edge Singapore (via Yahoo Finance), 2023-10-01)
  12. STT Singapore 2 factsheet (STT GDC, 2025-05)

More in Singapore

Also run by STT GDC

All projects in Singapore · All projects in Singapore · All STT GDC projects · All projects operational · Data center rules in Singapore · Full directory

Project team on other projects: HDR

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