TVB270MSC-L Equivalent & Substitute Parts

Part Overview

The TVB270MSC-L is a 275V off-state, 300A peak pulse (8/20µs) thyristor TVS diode in DO-214AA (SMB) surface mount package, manufactured by Littelfuse Inc. under the SiBar series. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Transient voltage suppressors in this category are used for overvoltage protection in industrial and consumer applications requiring high current handling capability at specified voltage thresholds.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	275	V
Voltage - Breakover	350	V
Voltage - On State	4	V
Current - Peak Pulse (8/20µs)	300	A
Current - Peak Pulse (10/1000µs)	100	A
Current - Hold (Ih)	150	mA
Capacitance	40	pF
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution for the TVB270MSC-L is determined by the following critical parameters:

Voltage - Off State: Must match or be within acceptable tolerance of 275V
Voltage - Breakover: Must be within the specified range (350V nominal)
Current - Peak Pulse (8/20µs): Must meet or exceed 300A requirement
Package / Case: Must be DO-214AA (SMB) for mechanical and thermal compatibility
Mounting Type: Must be Surface Mount
Number of Elements: Must be 1 (single element)

Based on these criteria, substitute parts are grouped into two categories:

Category A - Direct Voltage Class Substitutes (275V Off-State): Parts maintaining the 275V off-state voltage rating with equivalent or superior current handling.

Category B - Lower Voltage Class Parts (65V Off-State): Parts with significantly lower voltage ratings. These are listed in the original substitute field but operate in a different voltage protection class and are not electrically equivalent for 275V applications.

Parameter Comparison

Parameter	TVB270MSC-L	P3100SBLRP	SMP100MC-270	TB0720H-13-F	TB0720L-13-F	TB0720M-13-F	TISP4080H3BJR-S	TISP4080M3BJR-S	TISP5080H3BJR-S
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	STMicroelectronics	Diodes Inc.	Diodes Inc.	Diodes Inc.	Bourns Inc.	Bourns Inc.	Bourns Inc.
Voltage - Off State (V)	275	275	270	65	65	65	65	65	65
Voltage - Breakover (V)	350	350	335	88	88	88	80	80	80
Voltage - On State (V)	4	4	—	4.6	4.6	4.6	3	3	3
Current - Peak Pulse 8/20µs (A)	300	250	300	400	150	250	300	220	300
Current - Peak Pulse 10/1000µs (A)	100	80	100	100	30	50	100	50	100
Current - Hold Ih (mA)	150	150	150	150	150	150	150	150	150
Capacitance (pF)	40	45	40	200	100	140	140	87	345
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For 275V Off-State Applications:

P3100SBLRP (Littelfuse Inc., SIDACtor® series) is the primary substitute. It maintains the 275V off-state and 350V breakover specifications with active product status. Peak pulse current is rated at 250A (8/20µs), which is 50A lower than the original part. This part is suitable where the 250A rating meets application requirements.

SMP100MC-270 (STMicroelectronics, TRISIL™ series) provides equivalent 300A peak pulse current (8/20µs) with 270V off-state and 335V breakover. The 5V difference in off-state voltage and 15V difference in breakover voltage remain within typical design margins for transient suppression circuits. This part is suitable where the higher current rating is required.

For Lower Voltage Applications (65V Off-State):

The parts TB0720H-13-F, TB0720L-13-F, TB0720M-13-F (Diodes Incorporated), TISP4080H3BJR-S, TISP4080M3BJR-S, and TISP5080H3BJR-S (Bourns Inc.) operate at 65V off-state voltage and are not electrically equivalent to the TVB270MSC-L for 275V protection applications. These parts are suitable only for circuits requiring 65V transient suppression.

All substitute parts maintain DO-214AA (SMB) package compatibility, surface mount capability, 150mA hold current, and RoHS3 compliance with the original part.

Frequently Asked Questions (FAQ)

Q: Can P3100SBLRP be used as a direct replacement for TVB270MSC-L?

A: P3100SBLRP is electrically compatible for 275V off-state applications. It maintains identical voltage ratings (275V off-state, 350V breakover) and hold current (150mA). The peak pulse current rating is 250A versus 300A in the original part. Substitution is valid where the 250A rating satisfies application current requirements.

Q: What is the difference between SMP100MC-270 and TVB270MSC-L?

A: SMP100MC-270 differs in off-state voltage (270V vs. 275V) and breakover voltage (335V vs. 350V). Both differences are within 2% tolerance. SMP100MC-270 maintains the 300A peak pulse current (8/20µs) rating. The part is suitable for applications where these minor voltage variations are acceptable.

Q: Why are the 65V parts (TB0720 series, TISP4080, TISP5080) listed as substitutes if they have different voltage ratings?

A: These parts are listed in the original TVB270MSC-L substitute field but operate in a different voltage protection class. They are not electrically equivalent for 275V applications. Use these parts only for circuits designed for 65V transient suppression.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts listed are available in DO-214AA (SMB) surface mount package, ensuring mechanical and thermal compatibility with the original TVB270MSC-L footprint.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts are ROHS3 compliant and rated for EAR99 export classification. TISP4080H3BJR-S, TISP4080M3BJR-S, and TISP5080H3BJR-S are REACH Affected; all other parts are REACH Unaffected.

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