TSMBJ1018C Equivalent & Substitute Parts

Part Overview

The TSMBJ1018C is a 220V off-state, 400A peak pulse transient voltage suppressor thyristor manufactured by Micro Commercial Co 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 300V breakover voltage and 5V on-state voltage, designed for high-current transient suppression applications.

Substiute Parts

TSMBJ1018C

Micro Commercial CoIn Stock: 1161TSMBJ1018C Datasheet

Current PartRFQ

K2400SRP

Littelfuse Inc.In Stock: 3321K2400SRP Datasheet

SimilarRFQ

K2500SRP

Littelfuse Inc.In Stock: 3740K2500SRP Datasheet

SimilarRFQ

P2600SBLRP

Littelfuse Inc.In Stock: 3062P2600SBLRP Datasheet

SimilarRFQ

P2600SCLRP

Littelfuse Inc.In Stock: 7793P2600SCLRP Datasheet

SimilarRFQ

P2600SCMCLRP

Littelfuse Inc.In Stock: 1485P2600SCMCLRP Datasheet

SimilarRFQ

SMP100LC-230

STMicroelectronicsIn Stock: 187787SMP100LC-230 Datasheet

SimilarRFQ

SMTBJ200B

Littelfuse Inc.In Stock: 2950SMTBJ200B Datasheet

SimilarRFQ

SMTPA220

STMicroelectronicsIn Stock: 3747SMTPA220 Datasheet

SimilarRFQ

TB2600H-13-F

Diodes IncorporatedIn Stock: 20167TB2600H-13-F Datasheet

SimilarRFQ

TISP4290H3BJR-S

Bourns Inc.In Stock: 2799TISP4290H3BJR-S Datasheet

SimilarRFQ

TISP4290T3BJR-S

Bourns Inc.In Stock: 933TISP4290T3BJR-S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TSMBJ1018C is determined by the following critical parameters:

• Voltage - Off State: 220V (primary electrical specification)
• Voltage - Breakover: 300V (triggering threshold)
• Current - Peak Pulse (8/20µs): 400A (maximum transient handling capability)
• Current - Peak Pulse (10/1000µs): 100A (sustained pulse rating)
• Current - Hold (Ih): 150 mA (holding current specification)
• Package / Case: DO-214AA, SMB (mechanical and thermal compatibility)
• Mounting Type: Surface Mount (assembly process compatibility)

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents: Parts matching all critical electrical parameters (220V off-state, 300V breakover, 400A peak pulse capability, 150 mA hold current) in identical DO-214AA packaging.

Category B - Functional Alternatives: Parts with 220V off-state voltage and 400A peak pulse capability but with variations in breakover voltage, on-state voltage, or capacitance that remain within acceptable operating ranges for transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents)

TB2600H-13-F (Diodes Incorporated) and P2600SCLRP (Littelfuse Inc.) are the preferred direct substitutes. Both parts match the TSMBJ1018C across all critical electrical parameters: 220V off-state voltage, 300V breakover voltage, 400A peak pulse (8/20µs) capability, and 100A peak pulse (10/1000µs) rating. Both are active products with ROHS3 compliance, addressing the obsolescence and RoHS non-compliance status of the original part. TB2600H-13-F offers the lowest on-state voltage at 4.6V, while P2600SCLRP maintains 4V on-state voltage.

Secondary Substitutes (Functional Alternatives)

P2600SCMCLRP (Littelfuse Inc.) matches all electrical specifications including 5V on-state voltage identical to the original part, with the trade-off of reduced capacitance (45pF versus 80pF). This part is active and ROHS3 compliant.

SMP100LC-230 (STMicroelectronics) provides 400A peak pulse capability with a slightly elevated off-state voltage of 230V and lower breakover voltage of 285V. This part is suitable for applications where the 10V voltage differential is acceptable. It is active and ROHS3 compliant.

Limited Substitutes (Reduced Current Capability)

TISP4290H3BJR-S (Bourns Inc.) and P2600SBLRP (Littelfuse Inc.) both reduce peak pulse current handling to 300A and 250A respectively, making them suitable only for applications with lower transient current requirements. Both maintain 220V off-state voltage and are active with ROHS3 compliance.

SMTPA220 (STMicroelectronics) further reduces peak pulse current to 150A and is suitable only for low-current transient suppression applications.

Not Recommended

SMTBJ200B (Littelfuse Inc.) operates at 200V off-state voltage, creating a 20V differential from the original specification, and is RoHS non-compliant.

K2400SRP and K2500SRP (Littelfuse Inc.) are SIDAC/Diac thyristors with significantly different electrical characteristics (1A peak output versus 400A peak pulse) and are not suitable substitutes for this TVS thyristor application.

Frequently Asked Questions (FAQ)

Q: Can TB2600H-13-F directly replace TSMBJ1018C without circuit modification?

A: TB2600H-13-F is a direct electrical equivalent with matching 220V off-state, 300V breakover, and 400A peak pulse specifications. The 1.5V lower on-state voltage (4.6V versus 5V) represents improved performance characteristics and requires no circuit modification. Both use identical DO-214AA packaging.

Q: What is the significance of the capacitance difference between TSMBJ1018C (80pF) and P2600SCMCLRP (45pF)?

A: Capacitance affects high-frequency transient response. The 45pF value in P2600SCMCLRP provides faster response to rapid transients but may be less suitable for applications requiring specific impedance matching. Selection depends on the specific transient frequency spectrum of the application.

Q: Why is SMP100LC-230 listed as a substitute if the off-state voltage is 230V instead of 220V?

A: SMP100LC-230 maintains the critical 400A peak pulse (8/20µs) and 100A peak pulse (10/1000µs) specifications. The 10V higher off-state voltage (230V versus 220V) represents a 4.5% deviation and remains within acceptable tolerance for many transient suppression applications. This part is active and ROHS3 compliant, addressing obsolescence concerns.

Q: Are SIDAC parts K2400SRP and K2500SRP suitable alternatives?

A: No. These parts are SIDAC/Diac thyristors with 1A peak output current, fundamentally different from the TSMBJ1018C TVS thyristor rated for 400A peak pulse. They serve different circuit functions and are not electrically compatible.

Q: What compliance advantage do active substitutes provide over the obsolete TSMBJ1018C?

A: All recommended active substitutes are ROHS3 compliant, whereas TSMBJ1018C is RoHS non-compliant. ROHS3 compliance ensures compliance with current environmental regulations and supports long-term supply chain availability. Active product status guarantees continued manufacturing and support.

Q: Can TISP4290H3BJR-S be used in applications requiring 400A peak pulse handling?

A: No. TISP4290H3BJR-S is rated for 300A peak pulse (8/20µs), representing a 25% reduction from the TSMBJ1018C specification. Use this part only in applications with confirmed lower transient current requirements.

Q: What is the difference between "Current - Peak Pulse (8/20µs)" and "Current - Peak Pulse (10/1000µs)"?

A: These parameters define peak current handling under different pulse waveforms. The 8/20µs waveform represents fast transients (typical of lightning and ESD), while 10/1000µs represents slower, sustained transients. Both specifications must be considered for complete transient protection coverage.