B&D TRANSFORMER
B&D Transformer (PT. Bambang Djaja), founded in 1985 in Surabaya, Indonesia, manufactures power, distribution, and instrument transformers (15 kVA to 500 MVA, up to 275 kV) for utilities, oil & gas, mining, commercial, and industrial customers across Indonesia and select Southeast Asian export markets.
- Company typePrivate
- Founded1985
- HeadquartersSurabaya, Indonesia
- Headcount501–1,000
- GTM typeB2B
- OfferingHardware or Manufacturing
What B&D TRANSFORMER does
PT. Bambang Djaja, operating as B&D Transformer, is an Indonesian manufacturer of power, distribution, and instrument transformers founded in 1985 and headquartered in Surabaya, East Java. The company produces transformers spanning 15 kVA to 500 MVA at voltage ratings up to 275 kV through two manufacturing facilities in East Java (Rungkut Industri III in Surabaya and the Ngoro Industrial Park in Mojokerto), supplemented by sales offices in Jakarta and Semarang. Its portfolio encompasses power transformers, distribution transformers, compact substations (160 kVA–5,000 kVA), and specialized units including AVR/OLTC, amorphous-core, mobile, padmounted, phase-shifting, variable-speed-drive, and cast-resin dry-type variants, plus instrument transformers (CT/VT) and, since 2022, electric vehicle charging station (EVCS) infrastructure. In 2016, B&D became the first purely Indonesian-owned company to manufacture 150 kV power transformers and is now developing 500 kV ratings.
The company operates under a dense certification stack that qualifies it for strategic Indonesian tenders: ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, ISO/IEC 17025:2017, IEC/ANSI/NEMA/BSI product standards, ATEX (since May 2022), UL, Lloyd's Register, PLN Pusertif/LMK, BP MIGAS, ASTA, CSMS Pertamina, CSMS PLN, and SMK3 Kemnaker. It received the EcoVadis Bronze Medal in 2025 (top 35% in its sector) and a 'Best Compliance in Estate Regulation' award in 2024.
B&D's revenue model is built around project-based, custom-quoted hardware sales with multi-year contract cadence and an attached after-sales services stream (installation, relocation, site assessment, testing, commissioning, and 24/7 service). Go-to-market is direct enterprise field sales supported by inside-sales inquiries via [email protected] and a WhatsApp-enabled customer-care channel. The customer base spans Indonesian state-owned enterprises and large corporates: PLN and Indonesia Power for grid and generation, Pertamina for refinery power (RDMP RU-V Balikpapan, up to 65 MVA), Freeport Indonesia for mining (2.5–10 MVA distribution), PT Djarum for industrial manufacturing, plus commercial and hospitality buyers (Double Tree Surabaya, Jumeirah Bali, Citra Tower, One Galaxy Surabaya) and EPC contractors (PT PP Persero, Adhi Persada Gedung). Reported overseas activity is limited to a 30 MVA shipment to AFAB in the Philippines; the overwhelming majority of revenue is generated in Indonesia across six prioritized verticals — power utilities & grid, oil & gas, mining & resources, commercial & hospitality, industrial manufacturing, and infrastructure & construction.
B&D TRANSFORMER firmographics
Firmographics- Name
- B&D TRANSFORMER
- Legal name
- PT. Bambang Djaja
- Website
- https://bambangdjaja.com
- Company type
- Private
- Founded year
- 1985
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- B&D Transformer (PT. Bambang Djaja), founded in 1985 in Surabaya, Indonesia, manufactures power, distribution, and instrument transformers (15 kVA to 500 MVA, up to 275 kV) for utilities, oil & gas, mining, commercial, and industrial customers across Indonesia and select Southeast Asian export markets.
- Ownership category
- akta.pro rank
B&D TRANSFORMER industry classification
Industry- Product category
- Power and Distribution Transformer Manufacturing
- NAICS
- Power, Distribution, and Specialty Transformer Manufacturing (335311), Electrical Equipment Manufacturing (33531)
- SIC
- Power, Distribution & Specialty Transformers (3612), Switchgear & Switchboard Apparatus (3613)
- akta.pro primary industry
- Transformers (Power, Distribution, Instrument, Specialty) (IMAGAAAA)
- akta.pro secondary industries
- Reactive Power & Power Quality Equipment (Capacitor Banks, Reactors, STATCOM/SVC, Harmonic Filters) (IMAGAAAG), Medium-Voltage (MV) Distribution Substations & Switchgear (EUADACAB), Substations, Transformers & Grid Step-Up Facilities (EHV Substations, GSU Transformers) (EUAMAFAE)
Keywords
Where B&D TRANSFORMER is headquartered
LocationHeadquarters
- HQ city
- Surabaya
- HQ country
- Indonesia
- HQ region
- Asia
Offices4 records
Markets served
B&D TRANSFORMER business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales
Revenue model
- Power Transformer Sales: Manufacturing and sale of power transformers up to 275 kV, 500 MVA for substations and power plants. Products are fully tested before delivery and include installation support.
- Distribution Transformer Sales: Sale of distribution transformers ranging from 15 kVA to 100 MVA, including specialized variants like amorphous, mobile, padmounted, and cast resin types.
- After-Sales Services: Technical support services including testing, commissioning, operation assistance, installation, relocation, and site infrastructure assessment. Service team available 24/7.
- Custom Transformer Manufacturing: Bespoke transformer solutions tailored to specific customer requirements, providing customized ratings and specifications for specialized applications.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom Quote-Based Pricing |
Go-to-market motion1 record
Distribution channels4 records
Marketing channels6 records
B&D TRANSFORMER product offering
Product offeringCore offering
PT. Bambang Djaja (B&D Transformer) designs, manufactures, and supplies power, distribution, and instrument transformers for utility, industrial, oil & gas, mining, and commercial customers. Products range from 15 kVA to 500 MVA with voltage ratings up to 275 kV, complemented by compact substations, EV charging infrastructure, and 24/7 installation, commissioning, and after-sales services.
Product overview
B&D Transformer (PT. Bambang Djaja) is a transformer manufacturer offering a comprehensive portfolio of Power, Distribution, and Instrument Transformers. The product range spans from 15 kVA up to 500 MVA with voltage ratings up to 275 kV, including oil immersed and dry-type (cast resin) configurations. The core offering consists of Power Transformers (up to 275 kV, 500 MVA for substation and generating plant use) and Distribution Transformers (up to 40 kV, 100 MVA for general applications), supplemented by specialized sub-products including Compact Substations, AVR Transformers, Amorphous Transformers (energy-efficient), Mobile Transformers, Padmounted Transformers, Phase Shifting Transformers, Variable Speed Drive Transformers, and Cast Resin Transformers. Additional offerings include Instrument Transformers (CTVT) and EVCS (Electric Vehicle Charging Station) products. B&D also provides customized transformers and supports its products with installation, relocation, and after-sales services.
Differentiator
Problem solved
Functional benefit
Products and services
- Power Transformer Transformer designed for substation and generating plant applications, manufactured to customer specifications and applicable standards, rated up to 275 kV and 500 MVA (3 x 167 MVA). Sold to utility, power generation, and large industrial customers.
- Distribution Transformer
- Compact Substation
- AVR Transformer Transformer specifically designed to stabilize unstable line voltage, equipped with OLTC (On Load Tap Changer) and feedback control unit for automatic operation. Sold to industrial and utility customers with unstable grid conditions.
- Amorphous Transformer Energy-efficient transformer using amorphous metal core materials with high magnetic susceptibility, very low coercivity, and high electrical resistance, resulting in lower losses and reduced CO2 emissions. Sold to utilities and energy-conscious industrial customers.
- Mobile Transformer Transformer with additional equipment (trolley, switchgear, cable) for mobile purposes, available for up to 20 kV, 1000 kVA. Sold to event organizers, construction companies, and emergency power applications.
- Padmounted Transformer Transformer equipped with fuse and switching equipment (LBS for MV and MCCB or Fuse for LV), available for up to 36 kV, 2500 kVA. Sold to utilities and commercial real estate developers.
- Phase Shifting Transformer Specially designed transformer to suppress harmonic values caused by certain equipment in an electrical system. Sold to industrial customers with harmonic-sensitive equipment.
- Variable Speed Drive Transformer Transformer specially designed to convert low voltage VFD/VSD signals for controlling medium-voltage electrical motor speed. Sold to industrial customers using motor speed control systems.
- Cast Resin Transformer
- Instrument Transformer CTVT
- EVCS (Electric Vehicle Charging Station)
- After-Sales Service & Installation
Quantifiable outcome
- First purely Indonesian company to manufacture 150 kV Power Transformers in 2016
- +3 more outcomes
Companies that use B&D TRANSFORMER
Customer profileNamed customers17 records
Segments6 records
Ideal customer profiles4 records
B&D TRANSFORMER technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature11 records
B&D TRANSFORMER partnerships and signals
Strategic signalScale indicators4 records
Recent moves6 records
Expansion highlights6 records
B&D TRANSFORMER competitors and assessment
Company assessmentDirect peers
- Hitachi Energy (formerly ABB Power Grids): Global leader in transformers, HVDC, and grid integration. Directly competes with B&D for Indonesian utility and PLN high-voltage transformer contracts above 150 kV, and is the principal benchmark "world-class manufacturer" referenced in B&D's own customer testimonials.
- PT Unindo (Unindo Electric): Indonesian power and distribution transformer manufacturer headquartered in Jakarta. Directly competes with B&D for PLN projects and industrial customers in the domestic Indonesian market with overlapping product specifications and voltage classes.
- PT Trafoindo Prima Perkasa: Indonesian power transformer manufacturer serving PLN, IPPs, and industrial customers. Closest direct domestic competitor to B&D with comparable voltage class capabilities and similar Indonesian customer roster.
- CG Power and Industrial Solutions: Indian transformer manufacturer with global footprint across power, distribution, and instrument transformers. Comparable product breadth and serves emerging market utilities — direct overlap with B&D's voltage class and customer profile.
Broad incumbents
- Siemens Energy: Global energy technology major with a substantial transformer portfolio across power and distribution classes. Competes with B&D in Indonesian utility tenders and supplies EPC contractors operating in the region as part of a broader energy portfolio.
- Schneider Electric: Global electrical equipment and industrial automation leader offering distribution transformers, compact substations, and switchgear. Overlaps with B&D's distribution-class portfolio across commercial, hospitality, and industrial customer segments.
- Toshiba Energy Systems & Solutions: Japanese power transformer manufacturer with strong presence in ASEAN utility tenders. Competes with B&D in higher-voltage power transformer classes and has supplied large-scale generation and grid projects across Southeast Asia.
Emerging players
- TBEA Co., Ltd. Chinese transformer and HVDC manufacturer aggressively expanding into Southeast Asia. Competes primarily on price in distribution-class and mid-voltage tenders where B&D also operates, representing a key threat to pricing power.
- Hyundai Electric & Energy Systems: Korean power and distribution transformer manufacturer with growing presence in Southeast Asian markets. Competes in similar voltage classes and increasingly targets Indonesian utility and industrial projects.
Regional players
- Wilson Transformer Company: Australian power and distribution transformer manufacturer with comparable certifications (IEC, ASTA) and overlapping customer profile in mining and utilities. Comparable in scale and voltage range, serving the broader Asia-Pacific transformer market.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
B&D TRANSFORMER social profiles
Digital presenceB&D TRANSFORMER compliance and trust
Trust signalCompliance19 records
B&D TRANSFORMER financial estimates
Financial estimateRevenue estimate
Valuation estimate
B&D TRANSFORMER leadership team
Management profileNumber of profiles
B&D TRANSFORMER funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
B&D TRANSFORMER M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about B&D TRANSFORMER
What does B&D TRANSFORMER do?
PT. Bambang Djaja (B&D Transformer) designs, manufactures, and supplies power, distribution, and instrument transformers for utility, industrial, oil & gas, mining, and commercial customers. Products range from 15 kVA to 500 MVA with voltage ratings up to 275 kV, complemented by compact substations, EV charging infrastructure, and 24/7 installation, commissioning, and after-sales services.
Is B&D TRANSFORMER a public or private company?
B&D TRANSFORMER is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was B&D TRANSFORMER founded?
B&D TRANSFORMER was founded in 1985. It employs 501 to 1,000 people.
Where is B&D TRANSFORMER based?
B&D TRANSFORMER is headquartered in Surabaya, Indonesia, in the Asia region.
How does B&D TRANSFORMER make money?
Four revenue lines are on record. Power Transformer Sales are the primary driver. The others are distribution Transformer Sales, after-Sales Services and custom Transformer Manufacturing.
Who are B&D TRANSFORMER's main competitors?
Direct peers on record are Hitachi Energy (formerly ABB Power Grids), PT Unindo (Unindo Electric), PT Trafoindo Prima Perkasa and CG Power and Industrial Solutions. Broad incumbents are Siemens Energy, Schneider Electric and Toshiba Energy Systems & Solutions. Emerging players are TBEA Co., Ltd. and Hyundai Electric & Energy Systems. Wilson Transformer Company is listed as a regional player.
Does B&D TRANSFORMER have an API?
No public API is recorded for B&D TRANSFORMER.
What industry is B&D TRANSFORMER in?
B&D TRANSFORMER's product category is Power and Distribution Transformer Manufacturing. Its primary akta.pro industry code is IMAGAAAA, Transformers (Power, Distribution, Instrument, Specialty), with a secondary code of IMAGAAAG, Reactive Power & Power Quality Equipment (Capacitor Banks, Reactors, STATCOM/SVC, Harmonic Filters). Its NAICS code is 335311 and its SIC code is 3612.