Automotive DC/DC Converter Transformer Product Guide
Sagami Electric Co., Ltd. provides high-quality DC-DC converter transformers designed for automotive applications. This page presents our product lineup, technical specifications, and application examples.
- Specification overview
- Comparison of features of each series
- Product features and applications
- Product list
Transformer Product Map [Automotive Compatible Products]
Our automotive transformers offer an optimal balance between mounting area and output power.
Each product series supports a wide voltage range from AC 600V to AC 4000V, meeting the requirements of various automotive applications.
Specification overview
Detailed design parameters for each series are available, including core structure, magnetic configuration, terminal count, withstand voltage, output power, mounting area, height, frequency, and topology.
Standard Type
| Type | Appearance | Core Shape | Magnetic Structure | Number of Terminals (pcs) |
Voltage Rating (V) Max. |
Output Power (W) |
Mounting Area (mm²) |
Height (mm)Max. |
Frequency | Topology |
|---|---|---|---|---|---|---|---|---|---|---|
| VER9060A |
 |
ER |
 |
8 | AC1500 | 1.7 | 121 | 6.2 | 1000 | Flyback |
| VER9060B |
|
ER |
|
8 | AC2500 | 1.7 | 121 | 6.2 | 1000 | Flyback |
| VER1160A |
 |
ER |
|
8 | AC1500 | 2.3 | 158 | 6.1 | 1000 | Flyback |
| VER1160B |
 |
ER |
|
8 | AC2500 | 2.3 | 158 | 6.1 | 1000 | Flyback |
| VER1480B |
 |
ER |
|
10 | AC2500 | 5.4 | 260 | 8 | 1000 | Flyback |
| VEP7010A |
 |
EP |
 |
6 | AC600 | 2 | 142 | 8.6 | 1000 | Flyback |
| VEP7010B |
 |
EP |
|
8 | AC2500 | 2 | 112 | 10 | 1000 | Flyback |
| VEP1012A |
 |
EP |
|
8 | AC1500 | 3 | 196 | 11 | 500 | Flyback |
| VEP1012B |
 |
EP |
|
8 | AC2500 | 3 | 178 | 11.3 | 500 | Flyback |
| VEP1313A |
 |
EP |
|
10 | AC2500 | 7 | 245 | 12.4 | 500 | Flyback |
| VEP1313B |
 |
EP |
|
10 | AC2500 | 7 | 250 | 12.4 | 500 | Flyback |
| VEC1388B |
 |
EPC |
|
10 | AC2500 | 4.8 | 291 | 8.8 | 500 | Flyback |
| VEC1711B |
 |
EPC |
|
9 | AC2500 | 12 | 432 | 10.8 | 500 | Flyback |
| VEC1911A |
 |
EPC |
|
10 | AC1500 | 16.2 | 541 | 10.8 | 500 | Flyback |
| VEC1911B |
 |
EPC |
|
10 | AC2500 | 16.2 | 567 | 10.8 | 500 | Flyback |
| VEC2511B |
 |
EPC |
|
11 | AC2500 | 27 | 772 | 10.9 | 500 | Flyback |
| VEC2514B |
 |
EPC |
|
10 | AC2500 | 54 | 878 | 14 | 500 | Flyback |
Split Bobbin Type
| Type | Appearance | Core Shape | Magnetic Structure | Number of Terminals (pcs) |
Voltage Rating (V) Max. |
Output Power (W) |
Mounting Area (mm²) |
Height (mm)Max. |
Frequency | Topology |
|---|---|---|---|---|---|---|---|---|---|---|
| VLC1511B |
 |
EPC |
|
10 | AC2600 | 8.5 | 365 | 11.5 | 500 | Flyback |
High Dielectric Strength type (CTI level I)
| Type | Appearance | Core Shape | Magnetic Structure | Number of Terminals (pcs) |
Voltage Rating (V) Max. |
Output Power (W) |
Mounting Area (mm²) |
Height (mm)Max. |
Frequency | Topology |
|---|---|---|---|---|---|---|---|---|---|---|
| VER9060V |
 |
ER |
 |
8 | AC4000 | 1.7 | 158 | 6.4 | 1000 | Flyback |
| VER9012V |
 |
ER |
|
8 | AC4000 | 5 | 158 | 12.5 | 500 | Flyback |
| VEP1313V |
 |
EP |
|
9 | AC4000 | 7 | 200 | 14.5 | 500 | Flyback |
Pulse Transformer
| Type | Appearance | Core Shape | Magnetic Structure | Number of Terminals (pcs) |
Voltage Rating (V) Max. |
Output Power (W) |
Mounting Area (mm²) |
Height (mm)Max. |
Frequency | Topology |
|---|---|---|---|---|---|---|---|---|---|---|
| VERS1160B |
 |
ER |
|
8 | AC2500 | 2.3 | 158 | 6.5 | 2000 | Forward / Push-pull / Pulse communication |
| VEPS1313A |
 |
EP |
 |
10 | AC2500 | 7 | 250 | 13 | 2000 | Forward / Push-pull / Pulse communication |
| VHK1550V |
 |
UI |
 |
6 | AC3500 | 0.8 | 375 | 6 | 2000 | Forward / Push-pull / Pulse communication |
Comparison of features of each series
The four main series each have different designs and characteristics, supporting a wide range of automotive applications. Below is a comparison of their advantages and disadvantages for optimal product selection.
① VER series
- Key Advantages
- Large effective cross-sectional area for excellent magnetic performance
- No adhesive tape required for easier assembly
- Low-profile design with excellent vibration resistance
- Limitations
- Larger mounting area
- Limited high-inductance configurations
- Higher DC resistance tendency
② VEP series
- Key Advantages
- Excellent EMI suppression characteristics
- Tape-free structure
- Compact footprint
- Limitations
- Higher profile, slightly lower vibration resistance
- Electrical characteristics are mid-range between VER and VEC
③ VEC series
- Key Advantages
- Supports high inductance specifications
- Low DC resistance (DCR)
- Low-profile type (VEC13) provides excellent vibration resistance (25G)
- Limitations
- Adhesive tape is required (increases cost)
④ VLC series
- Key Advantages
- Low leakage inductance due to low-turn design
- High coupling efficiency
- Robust terminal structure for vibration resistance
- Limitations
- Higher profile compared to similar footprint designs
Product features and applications
Main Features
| · Custom design support | : | Optimized transformer designs available to meet customer-specific requirements |
| · Wide operating temperature range | : | Insulation specifications selectable according to application, from 600 Vrms to 4000 Vrms |
| · AEC-Q200 compliant | : | Fully compliant with automotive-grade electronic component reliability standards |
| · Wide operating temperature | : | Guaranteed operation from -40°C to +150°C (including self-heating). High thermal resistance ensures stable performance even in harsh automotive environments |
Main applications
- Battery Management Systems (BMS)
- Power control unit (PCU)
- Electric compressor control systems
- DC/DC converter circuits
- Inverter isolated power supplies
- IGBT gate driver circuits
Application Example ① HEV/EV Battery Management System
In battery management systems (BMS) for HEVs (Hybrid Electric Vehicles) and EVs (Electric Vehicles), high isolation voltage and low noise characteristics are critical requirements.
Our DC-DC converter transformers support low leakage and high dielectric strength specifications. They play an important role as isolated power supplies for cell monitoring circuits. In addition, their compact footprint enables implementation in space-constrained designs.
Application Example ② Flyback Converter
In flyback converter design, transformers are critical components that significantly impact efficiency and miniaturization.
Our transformers combine AEC-Q200 automotive-grade reliability with superior electrical characteristics, contributing to improved overall systemperformance.
Application Example ③ IGBT Gate Drive
In EV and HEV inverter systems, isolated power supplies for IGBT gate drive circuits are critical to system reliability.
Our transformers achieve high-speed response through a low-leakage inductance design and high vibration resistance through their terminal structure.
They support high-speed switching operation and are compatible with 800V battery systems due to high withstand voltage specifications
Product list
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