SMDB15/TR7 Equivalent & Substitute Parts

Part Overview

The SMDB15/TR7 is an active Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, classified as a Zener-type TVS array with four unidirectional channels. This component provides transient voltage protection for general-purpose applications in a surface-mount 8-SOIC package. Alternative equivalent and substitute parts are necessary when the primary part number is unavailable, when different clamping voltage or breakdown voltage specifications are required, or when alternative packaging formats (Cut Tape vs. Tape & Reel) are preferred for production workflows.

Substiute Parts

SMDB15/TR7

Microchip TechnologyIn Stock: 996SMDB15/TR7 Datasheet

Current PartRFQ

SMDA12/TR7

Microchip TechnologyIn Stock: 1618SMDA12/TR7 Datasheet

SimilarRFQ

SMDB05/TR7

Microchip TechnologyIn Stock: 1028SMDB05/TR7 Datasheet

SimilarRFQ

SMDB12/TR7

Microchip TechnologyIn Stock: 1272SMDB12/TR7 Datasheet

SimilarRFQ

SMDB24/TR7

Microchip TechnologyIn Stock: 1354SMDB24/TR7 Datasheet

SimilarRFQ

SMDB15

SMC Diode SolutionsIn Stock: 2579SMDB15 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diode arrays in the SMDB15/TR7 family is determined by the following key electrical parameters: Voltage - Reverse Standoff (Typ), Voltage - Breakdown (Min), and Voltage - Clamping (Max) @ Ipp. These parameters define the operating voltage window of the TVS device and determine its protective capability for specific circuit voltage levels.

The SMDB15/TR7 and its substitutes maintain compatibility across the following fixed parameters:

• Unidirectional Channels: 4
• Current - Peak Pulse (10/1000µs): 5A (8/20µs)
• Power - Peak Pulse: 300W
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Operating Temperature: -55°C ~ 150°C (TJ)
• Applications: General Purpose

Voltage-based substitutes are grouped as follows:

• Lower voltage tier (5V standoff): SMDB05/TR7
• Mid-voltage tier (12V standoff): SMDB12/TR7, SMDA12/TR7
• Primary voltage tier (15V standoff): SMDB15/TR7, SMDB15 (alternative manufacturer)
• Higher voltage tier (24V standoff): SMDB24/TR7

Packaging format variations (Tape & Reel vs. Cut Tape) do not affect electrical performance but determine procurement and assembly handling methods.

Parameter Comparison

Engineering Selection Recommendations

SMDB15/TR7 (Microchip, Tape & Reel): Primary selection for 15V standoff protection. Active product status with established supply. Tape & Reel packaging suitable for automated assembly and high-volume production.

SMDB12/TR7 (Microchip, Cut Tape): Direct equivalent with 12V standoff voltage. Appropriate for applications tolerating lower clamping voltage (19V vs. 24V). Shares identical electrical performance parameters with SMDA12/TR7 except packaging format. RoHS non-compliant status identical to primary part.

SMDA12/TR7 (Microchip, Cut Tape): Functionally equivalent to SMDB12/TR7 with identical electrical specifications. Cut Tape packaging format available. Higher inventory availability (1554 Pcs) compared to SMDB12/TR7 (1237 Pcs).

SMDB05/TR7 (Microchip, Tape & Reel): Lower voltage substitute for applications requiring 5V standoff protection and 11V clamping. Increased capacitance (400pF @ 1MHz) compared to primary part. Compatible package and mounting type.

SMDB24/TR7 (Microchip, Cut Tape): Higher voltage substitute for applications requiring 24V standoff protection and 43V clamping. Reduced capacitance (90pF @ 1MHz). Cut Tape packaging format.

SMDB15 (SMC Diode Solutions, Tape & Reel): Alternative manufacturer source with matching 15V standoff and 24V clamping parameters. Differs in current rating (1A vs. 5A) and operating temperature maximum (125°C vs. 150°C). ROHS3 Compliant status (vs. RoHS non-compliant) and REACH Affected status (vs. REACH Unaffected) indicate different regulatory compliance. Higher power capability (500W vs. 300W).

Frequently Asked Questions (FAQ)

Q: Can SMDB12/TR7 be used in place of SMDB15/TR7? A: SMDB12/TR7 operates with a lower Voltage - Reverse Standoff (12V vs. 15V) and lower Voltage - Clamping (19V vs. 24V). Substitution is only valid if the circuit voltage levels are compatible with the lower clamping specification. Circuits designed for 15V protection cannot use the 12V variant.

Q: What is the difference between SMDA12/TR7 and SMDB12/TR7? A: SMDA12/TR7 and SMDB12/TR7 are electrically identical with the same voltage ratings and current specifications. The difference is packaging format: SMDA12/TR7 is supplied in Cut Tape format, while SMDB12/TR7 is supplied in Cut Tape format as well. Both share identical 8-SOIC package dimensions (0.154", 3.90mm Width).

Q: Is SMDB15 from SMC Diode Solutions compatible with SMDB15/TR7 from Microchip? A: Both parts have identical Voltage - Reverse Standoff (15V), Voltage - Breakdown (16.7V), and Voltage - Clamping (24V) specifications, making them electrically equivalent for voltage protection. However, differences exist: SMC version has lower peak pulse current rating (1A vs. 5A), lower maximum operating temperature (125°C vs. 150°C), and different compliance certifications (ROHS3 Compliant vs. RoHS non-compliant; REACH Affected vs. REACH Unaffected). Component selection must account for current handling and temperature requirements of the target application.

Q: Can SMDB05/TR7 protect the same circuits as SMDB15/TR7? A: No. SMDB05/TR7 is rated for 5V standoff and 11V maximum clamping, compared to SMDB15/TR7 at 15V standoff and 24V clamping. SMDB05/TR7 is suitable only for low-voltage protection circuits operating at or below 5V standoff levels.

Q: What does the /TR7 suffix indicate? A: The /TR7 suffix designates Tape & Reel packaging format, suitable for automated assembly and bulk procurement. Variants without this suffix or with alternative suffixes (such as Cut Tape designations) indicate different packaging formats but identical electrical performance.

Q: Are all substitutes rated for the same current? A: All Microchip TVS array substitutes in this list are rated for 5A peak pulse current at 8/20µs pulse duration, except SMDB15 from SMC Diode Solutions, which is rated for 1A. Current rating must be verified against circuit transient pulse specifications before substitution.

Q: What are the temperature operating ranges for these parts? A: Microchip Technology parts (SMDB15/TR7, SMDA12/TR7, SMDB05/TR7, SMDB12/TR7, SMDB24/TR7) operate from -55°C to 150°C. SMC Diode Solutions SMDB15 operates from -55°C to 125°C. Application operating temperature requirements must not exceed the selected part's maximum junction temperature rating.