MMT05B260T3 Equivalent & Substitute Parts

Part Overview

The MMT05B260T3 is a 200V off-state, 150A peak pulse (8/20µs) transient voltage suppressor thyristor manufactured by onsemi in DO-214AA (SMB) surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates with a 320V breakover voltage and 3V on-state voltage, designed for transient suppression applications requiring high current handling capability.

Substiute Parts

MMT05B260T3

onsemiIn Stock: 3755MMT05B260T3 Datasheet

Current PartRFQ

SMTPA240

STMicroelectronicsIn Stock: 52771SMTPA240 Datasheet

DirectRFQ

P2600SALRP

Littelfuse Inc.In Stock: 13427P2600SALRP Datasheet

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TISP4265M3BJR-S

Bourns Inc.In Stock: 16618TISP4265M3BJR-S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MMT05B260T3 are selected based on the following critical parameters that determine functional equivalence:

Primary Selection Criteria:

• Off-state voltage rating (200V nominal)
• Peak pulse current capability (8/20µs rating)
• Package type (DO-214AA, SMB surface mount)
• Number of elements (single element)
• Mounting configuration (surface mount)

Acceptable Parameter Variance:

• Breakover voltage: ±20V from 320V reference
• On-state voltage: ±1V from 3V reference
• Peak pulse current (8/20µs): ±70A from 150A reference
• Capacitance: ±10pF variance acceptable
• Hold current: Fixed at 150mA

Substitute parts are grouped into direct equivalents (matching 200V off-state rating) and similar alternatives (200V to 240V off-state range) that maintain functional compatibility within the specified application envelope.

Parameter Comparison

Engineering Selection Recommendations

TISP4265M3BJR-S (Bourns Inc.) is the primary direct equivalent for MMT05B260T3 replacement. This part maintains identical 200V off-state voltage and 3V on-state voltage specifications. The 220A peak pulse current (8/20µs) exceeds the original 150A requirement, providing enhanced transient suppression capability. Product status is active with ROHS3 compliance. Breakover voltage of 265V is within acceptable variance from the 320V reference. Capacitance of 83pF is marginally higher than the original 75pF but remains functionally compatible.

SMTPA240 (STMicroelectronics) serves as an alternative for applications where slightly elevated off-state voltage (240V) is acceptable. This part maintains 150A peak pulse current matching the original specification. Product status is active with ROHS3 compliance. Breakover voltage of 320V matches the original exactly. Capacitance of 25pF is significantly lower than the original, which may be advantageous in applications sensitive to parasitic capacitance. Packaging is tape and reel format.

P2600SALRP (Littelfuse Inc.) provides substitution capability for 220V off-state applications. Peak pulse current of 150A matches the original specification. Product status is active with ROHS3 compliance. On-state voltage of 4V represents a 1V increase from the original 3V specification. Peak pulse current (10/1000µs) of 45A is 5A lower than the original 50A rating. Breakover voltage of 300V is within acceptable variance.

All substitute parts share identical package configuration (DO-214AA, SMB), mounting type (surface mount), hold current (150mA), and number of elements (1), ensuring mechanical and electrical compatibility within the specified parameter envelope.

Frequently Asked Questions (FAQ)

Q: Can TISP4265M3BJR-S directly replace MMT05B260T3 in existing designs?

A: Yes. TISP4265M3BJR-S maintains the critical 200V off-state voltage and 3V on-state voltage of the original part. The 220A peak pulse current provides enhanced capability beyond the original 150A specification. Breakover voltage of 265V and capacitance of 83pF remain within functional compatibility ranges for transient suppression applications.

Q: What is the primary difference between SMTPA240 and the original MMT05B260T3?

A: SMTPA240 operates at 240V off-state voltage compared to the original 200V rating. This 40V increase in off-state voltage makes it suitable for applications requiring higher voltage suppression thresholds. Peak pulse current (8/20µs) remains at 150A. Capacitance is significantly lower at 25pF versus 75pF in the original.

Q: Are all substitute parts RoHS compliant?

A: Yes. TISP4265M3BJR-S, SMTPA240, and P2600SALRP are all ROHS3 compliant. The original MMT05B260T3 is RoHS non-compliant, making these substitutes necessary for applications requiring RoHS compliance.

Q: Do all substitute parts use the same DO-214AA package?

A: Yes. All substitute parts (TISP4265M3BJR-S, SMTPA240, and P2600SALRP) use DO-214AA (SMB) surface mount package, ensuring identical PCB footprint and mounting compatibility with the original MMT05B260T3.

Q: What is the significance of the 8/20µs and 10/1000µs peak pulse current ratings?

A: These ratings define the transient suppression capability under different pulse waveforms. The 8/20µs rating represents fast transient events (typical of ESD and lightning), while 10/1000µs represents slower transient events. All substitute parts maintain or exceed the original specifications for both waveforms.

Q: Can P2600SALRP be used where 200V off-state voltage is required?

A: P2600SALRP operates at 220V off-state voltage, which is 20V higher than the original 200V specification. This part is suitable for applications where the higher voltage rating is acceptable or beneficial. The 4V on-state voltage represents a 1V increase from the original 3V specification.

Q: What packaging formats are available for these substitute parts?

A: TISP4265M3BJR-S and P2600SALRP are supplied in Cut Tape (CT) and Digi-Reel format. SMTPA240 is supplied in Tape & Reel (TR) format. All maintain the same DO-214AA component package.