SMDA05/TR7 Equivalent & Substitute Parts

Part Overview

The SMDA05/TR7 is a Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This unidirectional 4-channel TVS diode operates with a 5V reverse standoff voltage and provides 11V maximum clamping voltage at peak pulse current. The component is housed in an 8-SOIC surface mount package and is currently in active production status with 673 pieces available in inventory.

TVS diodes are critical components in circuit protection applications where transient voltage spikes must be suppressed to prevent damage to sensitive electronics. Equivalent and substitute parts are identified when they maintain compatibility across key electrical and mechanical parameters while meeting the same functional requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	5	V
Voltage - Breakdown (Min)	6	V
Voltage - Clamping (Max) @ Ipp	11	V
Current - Peak Pulse (10/1000µs)	5	A (8/20µs)
Power - Peak Pulse	300	W
Capacitance @ 1MHz	400	pF
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)	-
Mounting Type	Surface Mount	-
Unidirectional Channels	4	-

Substitute Part Grouping Explanation

Substitution eligibility for the SMDA05/TR7 is determined by strict alignment of the following critical parameters:

Electrical Compatibility Criteria:

Voltage - Reverse Standoff (Typ): 5V
Voltage - Breakdown (Min): 6V
Voltage - Clamping (Max) @ Ipp: 11V
Unidirectional Channels: 4
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Substitute Classification:

Direct Substitutes maintain all critical electrical parameters and mechanical specifications, ensuring pin-for-pin and functional compatibility:

SMDB05/TR7 (Microchip Technology)
SMDA05.TBT (Semtech Corporation)

Similar Parts share the same package, voltage ratings, and channel configuration but exhibit variations in secondary parameters such as peak pulse current or capacitance characteristics:

SMDA05 (SMC Diode Solutions)

Parameter Comparison

Parameter	SMDA05/TR7 (Main)	SMDB05/TR7	SMDA05.TBT	SMDA05 (SMC)
Manufacturer	Microchip Technology	Microchip Technology	Semtech Corporation	SMC Diode Solutions
Voltage - Reverse Standoff (Typ)	5V	5V	5V (Max)	5V (Max)
Voltage - Breakdown (Min)	6V	6V	6V	6V
Voltage - Clamping (Max) @ Ipp	11V	11V	11V	9.8V
Current - Peak Pulse (8/20µs)	5A	5A	17A	1A
Power - Peak Pulse	300W	300W	300W	300W
Capacitance @ 1MHz	400pF	400pF	400pF	600pF
Operating Temperature Range	-55 to 150°C	-55 to 150°C	-55 to 125°C	-55 to 125°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Unidirectional Channels	4	4	4	4
Product Status	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SMDB05/TR7 (Microchip Technology) is a direct substitute for SMDA05/TR7. Both components are manufactured by Microchip Technology and maintain identical electrical specifications across all critical parameters: 5V reverse standoff voltage, 6V minimum breakdown voltage, 11V maximum clamping voltage, and 5A peak pulse current. Both operate across the full temperature range of -55°C to 150°C and share the same 8-SOIC package configuration. The SMDB05/TR7 offers higher inventory availability (954 pieces) compared to the main part. Both components carry the same RoHS non-compliant status.

SMDA05.TBT (Semtech Corporation) is a direct substitute with enhanced current handling capability. This component maintains the same voltage ratings (5V standoff, 6V breakdown, 11V clamping) and package configuration as the SMDA05/TR7. The SMDA05.TBT provides superior peak pulse current capacity at 17A compared to 5A in the main part, while maintaining identical 300W peak pulse power and 400pF capacitance specifications. The SMDA05.TBT is ROHS3 compliant, offering improved environmental compliance compared to the RoHS non-compliant main part. Operating temperature range is -55°C to 125°C. This part is available in higher inventory (1800 pieces).

SMDA05 (SMC Diode Solutions) is classified as a similar part with parameter variations. While it maintains the same 5V reverse standoff voltage, 6V breakdown voltage, and 8-SOIC package configuration, the clamping voltage is reduced to 9.8V (compared to 11V in the main part) and peak pulse current is limited to 1A (compared to 5A). The capacitance is higher at 600pF. This part is ROHS3 compliant and operates within -55°C to 125°C. Selection of this part requires confirmation that the reduced clamping voltage and current specifications are acceptable for the target application.

Frequently Asked Questions (FAQ)

Q: Can SMDB05/TR7 be used as a direct replacement for SMDA05/TR7?

A: Yes. SMDB05/TR7 is a direct substitute. Both components share identical electrical specifications including 5V reverse standoff voltage, 11V clamping voltage, and 5A peak pulse current. Both are manufactured by Microchip Technology, operate across -55°C to 150°C, and use the same 8-SOIC package. Pin configuration and functional performance are equivalent.

Q: What is the primary advantage of SMDA05.TBT over SMDA05/TR7?

A: SMDA05.TBT provides higher peak pulse current capacity at 17A compared to 5A in the SMDA05/TR7, while maintaining identical voltage ratings and clamping characteristics. Additionally, SMDA05.TBT is ROHS3 compliant, whereas SMDA05/TR7 is RoHS non-compliant. The operating temperature range is -55°C to 125°C versus -55°C to 150°C for the main part.

Q: Is SMDA05 (SMC Diode Solutions) suitable as a replacement for SMDA05/TR7?

A: SMDA05 from SMC Diode Solutions shares the same package and basic voltage ratings but exhibits critical parameter differences. The clamping voltage is 9.8V instead of 11V, and peak pulse current is 1A instead of 5A. This part is suitable only if the application can tolerate reduced clamping voltage and current specifications. Verification against circuit requirements is necessary.

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

A: All substitute parts listed are supplied in Tape & Reel (TR) packaging and use the 8-SOIC surface mount package configuration. They are compatible with standard surface mount assembly processes.

Q: What is the difference between RoHS non-compliant and ROHS3 compliant status?

A: SMDA05/TR7 and SMDB05/TR7 are RoHS non-compliant, meaning they may contain restricted substances. SMDA05.TBT and SMDA05 (SMC) are ROHS3 compliant, indicating they meet the Restriction of Hazardous Substances Directive requirements. Selection between compliant and non-compliant parts depends on regulatory requirements for the end application and target markets.

Q: Can these parts be used interchangeably in high-temperature applications?

A: SMDA05/TR7 and SMDB05/TR7 operate to 150°C junction temperature, while SMDA05.TBT and SMDA05 (SMC) operate to 125°C. For applications requiring operation above 125°C, only SMDA05/TR7 or SMDB05/TR7 are suitable.

Q: How do capacitance differences affect circuit performance?

A: The main part and direct substitutes (SMDB05/TR7 and SMDA05.TBT) all specify 400pF capacitance at 1MHz. SMDA05 (SMC) specifies 600pF. Capacitance affects high-frequency response and signal integrity. Selection should be based on circuit impedance and frequency requirements.

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