SMBG18C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBG18C-E3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates with an 18V reverse standoff voltage and provides transient protection through a 32.2V maximum clamping voltage at peak pulse current. The device is housed in a DO-215AA (SMB) surface mount package and is rated for 600W peak pulse power dissipation across a temperature range of -55°C to 150°C.

The SMBG18C-E3/52 is currently listed as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

SMBG18C-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 853SMBG18C-E3/52 Datasheet

Current PartRFQ

SMBG18CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 17776SMBG18CA-E3/52 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBG18C-E3/52 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must equal 18V
• Voltage - Breakdown (Min): Must equal 20V
• Package / Case: Must be DO-215AA, SMB Gull Wing
• Mounting Type: Must be Surface Mount
• Bidirectional Channels: Must equal 1
• Type: Must be Zener
• Operating Temperature Range: Must encompass -55°C to 150°C (TJ)

The SMBG18CA-E3/52 meets all substitution criteria. Both parts share identical reverse standoff voltage, breakdown voltage, package configuration, mounting type, channel count, and diode type. The operating temperature range is identical. While the clamping voltage and peak pulse current differ slightly, these variations remain within the functional tolerance of the 18V protection class and do not preclude substitution in applications designed for the SMBG18C-E3/52.

Parameter Comparison

Engineering Selection Recommendations

The SMBG18CA-E3/52 is the direct substitute for the obsolete SMBG18C-E3/52. Both components are manufactured by Vishay General Semiconductor - Diodes Division and carry identical RoHS3 compliance, REACH unaffected status, and MSL 1 ratings. The SMBG18CA-E3/52 is currently in active production with substantial inventory availability (17,730 pcs), whereas the SMBG18C-E3/52 is obsolete.

From a compliance and regulatory perspective, both parts meet the same environmental and safety standards. The SMBG18CA-E3/52 offers improved peak pulse current capability (20.5A versus 18.6A) and a lower maximum clamping voltage (29.2V versus 32.2V), both of which represent favorable performance characteristics for transient suppression in the 18V protection class.

Frequently Asked Questions (FAQ)

Q: Can the SMBG18CA-E3/52 be used as a direct replacement for the SMBG18C-E3/52?

A: Yes. Both parts share identical reverse standoff voltage (18V), breakdown voltage (20V), package configuration (DO-215AA SMB), mounting type (surface mount), and operating temperature range (-55°C to 150°C). The SMBG18CA-E3/52 is the designated substitute.

Q: What are the differences between these two parts?

A: The primary differences are product status and performance characteristics. The SMBG18C-E3/52 is obsolete, while the SMBG18CA-E3/52 is active. The SMBG18CA-E3/52 provides higher peak pulse current (20.5A versus 18.6A) and lower maximum clamping voltage (29.2V versus 32.2V).

Q: Are there any package or mounting differences?

A: No. Both parts use the DO-215AA (SMB Gull Wing) surface mount package. PCB footprints and assembly processes are identical.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SMBG18C-E3/52 and SMBG18CA-E3/52 are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings.

Q: Why is the clamping voltage different between the two parts?

A: The SMBG18CA-E3/52 exhibits a lower maximum clamping voltage (29.2V) compared to the SMBG18C-E3/52 (32.2V). Both remain within acceptable limits for 18V protection class applications. The lower clamping voltage in the substitute part represents improved transient suppression performance.