TSMBJ0312C Equivalent & Substitute Parts

Part Overview

The TSMBJ0312C is a 160V off-state, 150A peak pulse TVS thyristor in DO-214AA (SMB) surface mount package manufactured by Micro Commercial Co. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The part functions as a transient voltage suppressor for circuit protection applications requiring fast response to voltage transients.

Substiute Parts

TSMBJ0312C

Micro Commercial CoIn Stock: 787TSMBJ0312C Datasheet

Current PartRFQ

TB1800M-13-F

Diodes IncorporatedIn Stock: 4501TB1800M-13-F Datasheet

DirectRFQ

SMP100LC-160

STMicroelectronicsIn Stock: 5118SMP100LC-160 Datasheet

SimilarRFQ

SMP100MC-160

STMicroelectronicsIn Stock: 4008SMP100MC-160 Datasheet

SimilarRFQ

SMTPA180

STMicroelectronicsIn Stock: 3882SMTPA180 Datasheet

SimilarRFQ

TISP4220H3BJR-S

Bourns Inc.In Stock: 29369TISP4220H3BJR-S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TSMBJ0312C is determined by the following critical parameters:

• Voltage - Off State: 160V (primary electrical requirement)
• Package / Case: DO-214AA, SMB (mechanical and thermal compatibility)
• Mounting Type: Surface Mount (assembly process compatibility)
• Current - Peak Pulse (8/20µs): minimum 150A (functional requirement)
• Current - Hold (Ih): 150mA (holding characteristic requirement)

Substitute parts are grouped into two categories:

Direct Substitutes maintain the 160V off-state voltage specification with equal or higher peak pulse current ratings.

Similar Substitutes include parts with alternative voltage ratings (180V off-state) that may be suitable depending on circuit design margins, or parts with higher current ratings that provide enhanced transient protection capability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (160V Off-State):

TB1800M-13-F, SMP100MC-160, SMP100LC-160, and TISP4220H3BJR-S all maintain the 160V off-state voltage specification of the TSMBJ0312C. All substitute parts are active products with ROHS3 compliance, addressing the obsolescence and regulatory status of the original part. TB1800M-13-F and TISP4220H3BJR-S match the 220V breakover voltage. SMP100MC-160 and SMP100LC-160 feature lower breakover voltages (200V) with significantly higher peak pulse current ratings (300A and 400A respectively), providing enhanced transient suppression capability.

Alternative Substitute (180V Off-State):

SMTPA180 operates at 180V off-state with 240V breakover voltage. This part matches the original 150A peak pulse current specification and is suitable only when circuit design margins accommodate the higher voltage rating.

All substitute parts are available in active production status with current inventory levels, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can TB1800M-13-F directly replace TSMBJ0312C?

A: Yes. TB1800M-13-F maintains identical 160V off-state and 220V breakover voltages. It provides higher peak pulse current (250A vs. 150A), lower on-state voltage (4.6V vs. 5V), and is ROHS3 compliant with active product status.

Q: What is the difference between the STMicroelectronics SMP100 series parts?

A: SMP100MC-160 and SMP100LC-160 both operate at 160V off-state but differ in peak pulse current ratings. SMP100MC-160 handles 300A, while SMP100LC-160 handles 400A. Both feature 200V breakover voltage and higher current ratings than the original TSMBJ0312C.

Q: Is SMTPA180 compatible with TSMBJ0312C applications?

A: SMTPA180 operates at 180V off-state versus 160V for TSMBJ0312C. Compatibility depends on circuit design voltage margins. The 20V difference in off-state voltage may affect protection thresholds and must be evaluated against specific application requirements.

Q: Are all substitute parts in the same package?

A: Yes. All substitute parts use DO-214AA (SMB) surface mount package, ensuring mechanical and thermal compatibility with existing PCB designs.

Q: What is the regulatory compliance status of substitute parts?

A: All substitute parts are ROHS3 compliant, addressing the RoHS non-compliance status of the obsolete TSMBJ0312C. REACH status varies: TB1800M-13-F, SMP100MC-160, SMP100LC-160, and SMTPA180 are REACH Unaffected; TISP4220H3BJR-S is REACH Affected.