B&D TRANSFORMER

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.

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

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

• Power transformer manufacturing
• Distribution transformer production
• Instrument transformer supply
• Electrical substation equipment
• Cast resin transformer manufacturing

Headquarters

HQ city

Surabaya

HQ country

Indonesia

HQ region

Asia

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. 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.
2. 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.
3. After-Sales Services: Technical support services including testing, commissioning, operation assistance, installation, relocation, and site infrastructure assessment. Service team available 24/7.
4. Custom Transformer Manufacturing: Bespoke transformer solutions tailored to specific customer requirements, providing customized ratings and specifications for specialized applications.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels6 records

Core 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

Named customers17 records

Segments6 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature11 records

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct 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

• YouTubeyoutube.com/channel/UCdXQ9i2OD_8a5HPW2XhBq7Q
• Xx.com/bambangdjaja
• Facebookfacebook.com/PT-Bambang-Djaja-100080106190608
• LinkedInlinkedin.com/company/bdtransformer

Compliance19 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about B&D TRANSFORMER