SMDA12CE3/TR7 Equivalent & Substitute Parts

Part Overview

The SMDA12CE3/TR7 is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, part of the TVSarray™ series. This surface-mount component is designed for general-purpose transient voltage protection in 8-SOIC packaging. The device features a 12V reverse standoff voltage with 19V maximum clamping voltage and 5A peak pulse current capability.

The SMDA12CE3/TR7 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from active product lines that maintain identical or compatible electrical and mechanical specifications, enabling direct replacement in existing designs.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	12	V
Voltage - Breakdown (Min)	13.3	V
Voltage - Clamping (Max) @ Ipp	19	V
Current - Peak Pulse (10/1000µs)	5	A (8/20µs)
Power - Peak Pulse	300	W
Bidirectional Channels	4	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Operating Temperature	-55 to 150	°C (TJ)
Capacitance @ 1MHz	95	pF

Substitute Part Grouping Explanation

Substitute parts for the SMDA12CE3/TR7 are classified into two categories based on electrical parameter compatibility:

Direct Equivalents maintain identical electrical specifications across all critical parameters: 12V reverse standoff voltage, 13.3V minimum breakdown voltage, 19V maximum clamping voltage, 5A peak pulse current, 300W peak pulse power, 4 bidirectional channels, and 8-SOIC package. These parts differ only in product status (active versus discontinued) or packaging format (Tape & Reel versus Cut Tape).

Similar Alternatives share the same package, mounting type, and general application category but feature different voltage ratings. These parts are suitable for designs requiring higher voltage protection levels while maintaining the same physical footprint and channel configuration.

The following parameters determine substitution eligibility:

Voltage - Reverse Standoff (Typ)
Voltage - Breakdown (Min)
Voltage - Clamping (Max) @ Ipp
Current - Peak Pulse (10/1000µs)
Bidirectional Channels
Package / Case
Mounting Type

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (8/20µs)	Power - Peak Pulse	Bidirectional Channels	Package	Operating Temperature	Capacitance @ 1MHz
SMDA12CE3/TR7	Microchip Technology	Discontinued	12V	13.3V	19V	5A	300W	4	8-SOIC	-55 to 150°C	95pF
SMDB12C/TR7	Microchip Technology	Active	12V	13.3V	19V	5A	300W	4	8-SOIC	-55 to 150°C	95pF
SMDB12CE3/TR7	Microchip Technology	Active	12V	13.3V	19V	5A	300W	4	8-SOIC	-55 to 150°C	95pF
SMDA15CE3/TR7	Microchip Technology	Active	15V	16.7V	24V	5A	300W	4	8-SOIC	-55 to 150°C	70pF
SMDA24C/TR7	Microchip Technology	Active	24V	26.7V	43V	5A	300W	4	8-SOIC	-55 to 150°C	45pF
SMDA12C.TBT	Semtech Corporation	Active	12V	13.3V	24V	12A	300W	4	8-SOIC	-55 to 125°C	120pF

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Specifications):

SMDB12C/TR7 and SMDB12CE3/TR7 are direct functional equivalents to the SMDA12CE3/TR7. Both parts are manufactured by Microchip Technology and maintain identical electrical parameters across all critical specifications. Both are currently in active product status with substantial inventory availability. SMDB12C/TR7 carries ROHS3 compliance, while SMDB12CE3/TR7 also carries ROHS3 compliance. Selection between these two direct equivalents depends on internal part numbering conventions and procurement requirements.

Higher Voltage Alternatives (Same Package, Different Voltage Rating):

SMDA15CE3/TR7 and SMDA24C/TR7 are suitable for applications requiring higher transient voltage protection. SMDA15CE3/TR7 provides 15V reverse standoff with 24V clamping voltage, while SMDA24C/TR7 provides 24V reverse standoff with 43V clamping voltage. Both maintain the same 5A peak pulse current, 300W peak pulse power, 4 bidirectional channels, and 8-SOIC package. SMDA15CE3/TR7 carries ROHS3 compliance. SMDA24C/TR7 is RoHS non-compliant and should be evaluated against compliance requirements.

Alternative Manufacturer (Different Electrical Characteristics):

SMDA12C.TBT, manufactured by Semtech Corporation, maintains the 12V reverse standoff voltage and 13.3V minimum breakdown voltage but features 24V maximum clamping voltage and 12A peak pulse current. This part offers higher current handling capability at the cost of higher clamping voltage. Operating temperature range is -55 to 125°C, which is narrower than the Microchip alternatives. SMDA12C.TBT carries ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can SMDB12C/TR7 or SMDB12CE3/TR7 be used as direct replacements for SMDA12CE3/TR7?

A: Yes. Both SMDB12C/TR7 and SMDB12CE3/TR7 are direct functional equivalents with identical electrical specifications: 12V reverse standoff voltage, 13.3V minimum breakdown voltage, 19V maximum clamping voltage, 5A peak pulse current, and 300W peak pulse power. All three parts use the same 8-SOIC package and support 4 bidirectional channels. The primary difference is product status: SMDB parts are active, while SMDA12CE3/TR7 is discontinued.

Q: What is the difference between SMDB12C/TR7 and SMDB12CE3/TR7?

A: Both parts are electrically identical and carry the same specifications. The difference lies in internal Microchip part numbering conventions. Both are active products with ROHS3 compliance and suitable for direct substitution.

Q: Can SMDA15CE3/TR7 or SMDA24C/TR7 be used in place of SMDA12CE3/TR7?

A: These parts are not direct replacements. SMDA15CE3/TR7 features 15V reverse standoff and 24V clamping voltage, while SMDA24C/TR7 features 24V reverse standoff and 43V clamping voltage. Use these alternatives only if the circuit design requires higher voltage protection levels. The 8-SOIC package and 4 bidirectional channels remain compatible.

Q: What are the compliance differences between substitute parts?

A: SMDB12C/TR7, SMDB12CE3/TR7, SMDA15CE3/TR7, and SMDA12C.TBT all carry ROHS3 compliance. SMDA24C/TR7 is RoHS non-compliant. All parts are REACH Unaffected and carry EAR99 ECCN classification. Verify compliance requirements for your specific application before selection.

Q: Does the Semtech SMDA12C.TBT offer any advantages over Microchip alternatives?

A: SMDA12C.TBT maintains the same 12V reverse standoff voltage as the original part but features higher peak pulse current (12A versus 5A) and higher clamping voltage (24V versus 19V). This part is suitable for applications requiring greater current handling capability. However, the operating temperature range is narrower (-55 to 125°C versus -55 to 150°C), and it is supplied in Cut Tape & Digi-Reel® packaging rather than Tape & Reel format.

Q: Are all substitute parts available in the same packaging format?

A: SMDB12C/TR7, SMDB12CE3/TR7, SMDA15CE3/TR7, and SMDA24C/TR7 are supplied in Tape & Reel (TR) packaging. SMDA12C.TBT is supplied in Cut Tape (CT) & Digi-Reel® format. Verify packaging requirements for automated assembly processes before selection.

Q: What inventory levels are available for substitute parts?

A: SMDB12C/TR7 has 4083 pieces in stock. SMDB12CE3/TR7 has 738 pieces in stock. SMDA15CE3/TR7 has 1615 pieces in stock. SMDA24C/TR7 has 1688 pieces in stock. SMDA12C.TBT has 1789 pieces in stock. Verify current inventory status with your supplier for production requirements.

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