ROHM News Detail

ROHM’s New SiC Schottky Barrier Diodes for High Voltage xEV Systems:
Featuring a Unique Package Design for Improved Insulation Resistance
Achieves approx. 1.3 times the creepage distance compared to standard products.

SCS2xxxNHR

ROHM has developed surface mount SiC Schottky barrier diodes (SBDs) that improve insulation resistance by increasing the creepage distance between terminals. The initial lineup includes eight models - SCS2xxxNHR - for automotive applications such as onboard chargers (OBCs), with plans to deploy eight models - SCS2xxxN - for industrial equipment such as FA devices and PV inverters in December 2024.

The rapidly expanding xEV market is driving the demand for power semiconductors, among them SiC SBDs, that provide low heat generation along with high-speed switching and high-voltage capabilities in applications such as onboard chargers. Additionally, manufacturers increasingly rely on compact surface mount devices (SMDs) compatible with automated assembly equipment to boost manufacturing efficiency. Compact SMDs tend to typically feature smaller creepage distances, fact that makes high-voltage tracking prevention a critical design challenge.

As leading SiC supplier, ROHM has been working to develop high-performance SiC SBDs that offer breakdown voltages suitable for high-voltage applications with ease of mounting. Adopting an optimized package shape, it achieves a minimum creepage distance of 5.1mm, improving insulation performance when contrasted with standard products.

Comparison of SiC SBD Package Shape Designs

The new products utilize an original design that removes the center pin previously located at the bottom of the package, extending the creepage distance to a minimum of 5.1mm, approx. 1.3 times greater than standard products. This minimizes the possibility of tracking (creepage discharge) between terminals, eliminating the need for insulation treatment through resin potting when surface mounting the device on circuit boards in high voltage applications. Additionally, the devices can be mounted on the same land pattern as standard and conventional TO-263 package products, allowing an easy replacement on existing circuit boards.

Two voltage ratings are offered, 650V and 1200V, supporting 400V systems commonly used in xEVs as well as higher voltage systems expected to gain wider adoption in the future. The automotive-grade SCS2xxxNHR are AEC-Q101 qualified, ensuring they meet the high reliability standards this application sector demands.

Going forward, ROHM will continue to develop high-voltage SBDs using SiC, contributing to low energy consumption and high efficiency requirements in automotive and industrial equipment by providing optimal power devices that meet market needs.

Product Lineup

Part No. for
Automotive
(AEC-Q101 Qualified)
Data
Sheet
Part No. for
Industrial
Equipment
Reverse
Voltage
VRM
[V]
Forward
Current
IF[A]
Electrical Characteristics Circuit Package
[mm]
TVj
Max.
[°C]
VFMax.(TVj=25°C) IRMax.(TVj=25°C)
  Cond.   Cond.
NewSCS210ANHR PDF ☆SCS210AN 650 10 175 1.55V IF=10A 200μA VR=600V Single TO-263-2L
TO-263-2L
[10.1×15.1×4.5]
NewSCS212ANHR PDF ☆SCS212AN 12 IF=12A 240μA
NewSCS215ANHR PDF ☆SCS215AN 15 IF=15A 300μA
NewSCS220ANHR PDF ☆SCS220AN 20 IF=20A 400μA
NewSCS230ANHR PDF ☆SCS230AN 30 IF=30A 600μA
NewSCS205KNHR PDF ☆SCS205KN 1200 5 1.6V IF=5A 100μA VR=1200V
NewSCS210KNHR PDF ☆SCS210KN 10 IF=10A 200μA
NewSCS220KNHR PDF ☆SCS220KN 20 IF=20A 400μA

☆: Under Development

The package type is indicated by ROHM package.

Application Examples

◇ Automotive applications: Onboard chargers (OBCs), DC-DC converters, etc.
◇ Industrial Equipment: AC servo motors for industrial robots, PV inverters, power conditioners, uninterruptible power supplies (UPS), and more

Online Sales Information

Availability: The SCS2xxxxNHR for automotive applications are available now.
The SCS2xxxN for industrial equipment are scheduled in December 2024.
Pricing: $10.50/unit (samples, excluding tax)
Online Distributors: DigiKey™, Mouser™ and Farnell™
The products will be offered at other online distributors as they become available.

Online Distributors

  • DigiKey
  • Mouser
  • Farnell

EcoSiC™ Brand

EcoSiC™ is a brand of devices that leverage silicon carbide, which is attracting attention in the power device field for performance that surpasses silicon. ROHM independently develops technologies essential for the advancement of SiC, from wafer fabrication and production processes to packaging, and quality control methods. At the same time, we have established an integrated production system throughout the manufacturing process, solidifying our position as a leading SiC supplier.

EcoSiC™

・EcoSiC™ is a trademark or registered trademark of ROHM Co., Ltd.

Terminology

Creepage Distance
The shortest distance between two conductive elements (terminals) along the surface of the device package. In semiconductor design, insulation measures with such creepage and clearance distances must be taken to prevent electric shocks, leakage currents, and short-circuits in semiconductor products.
Tracking (Creepage Discharge)
A phenomenon where discharge occurs along the surface of the package (insulator) when high voltage is applied to the conductive terminals. This can create an unintended conductive path between patterns, potentially leading to dielectric breakdown of the device. Package miniaturization increases the risk of tracking by reducing creepage distance.
Resin Potting
The process of encapsulating the device body and the electrode connections between the device and circuit with resin, such as epoxy, to provide electrical insulation. This provides durability and weather resistance by protecting against water, dust, and other environmental conditions.
AEC-Q101 Automotive Reliability Standard
AEC stands for Automotive Electronics Council, a reliability standard for automotive electronic components established by major automotive manufacturers and US electronic component makers. Q101 is a standard that specifically applies to discrete semiconductor products (i.e. transistors, diodes).

Note: DigiKey™, Mouser™ and Farnell™ are trademarks or registered trademarks of their respective companies.

Featured Products

Featured Products
Wide Creepage Distance Package
SiC Schottky Barrier Diodes
SCS2xxAN (650V), SCS2xxKN (1,200V)
(PDF: 1.1MB)