TVB190NSB-L Equivalent & Substitute Parts

Part Overview

The TVB190NSB-L is a 190V off-state transient voltage suppressor thyristor manufactured by Littelfuse Inc. in the SiBar series, packaged in DO-214AA (SMB) surface mount configuration. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The part delivers 250A peak pulse current (8/20µs) with a 260V breakover voltage and 4V on-state voltage, designed for transient overvoltage protection applications.

Substiute Parts

TVB190NSB-L

Littelfuse Inc.In Stock: 1011TVB190NSB-L Datasheet

Current PartRFQ

P2300SBLRP

Littelfuse Inc.In Stock: 20447P2300SBLRP Datasheet

DirectRFQ

TB2300M-13-F

Diodes IncorporatedIn Stock: 20457TB2300M-13-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS thyristors is determined by strict equivalence across electrical and mechanical parameters. The following criteria establish valid substitutes for the TVB190NSB-L:

Primary Substitution Criteria:

• Off-state voltage: 190V (exact match required)
• Breakover voltage: 260V ±5V tolerance
• On-state voltage: 4V ±0.5V tolerance
• Peak pulse current (8/20µs): 250A (exact match required)
• Package: DO-214AA, SMB (identical form factor and pinout)
• Mounting type: Surface mount
• Number of elements: 1

Secondary Compliance Criteria:

• RoHS3 compliance
• Moisture sensitivity level MSL 1 (unlimited)
• REACH unaffected status

Two active substitute parts meet these criteria and are identified in the provided substitute list.

Parameter Comparison

Engineering Selection Recommendations

P2300SBLRP (Littelfuse Inc.) is the primary substitute. This part maintains identical electrical specifications across all critical parameters: 190V off-state voltage, 260V breakover voltage, 4V on-state voltage, and 250A peak pulse current (8/20µs). The part is active in production with 20,400 units in stock. Packaging is tape and reel format. All compliance certifications match the original part.

TB2300M-13-F (Diodes Incorporated) is an alternative substitute with minor parameter variations. Breakover voltage is 265V (5V higher than specified), on-state voltage is 4.6V (0.5V lower), and peak pulse current (10/1000µs) is 50A (30A lower than the original). This part includes automotive-grade qualification and AEC-Q101 certification, making it suitable for applications requiring automotive compliance. All other critical parameters align with substitution criteria.

Both substitutes are ROHS3 compliant, MSL 1 rated, and REACH unaffected. Selection between them depends on application requirements: use P2300SBLRP for direct electrical equivalence, or TB2300M-13-F if automotive qualification is required and the parameter variations are acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can P2300SBLRP directly replace TVB190NSB-L without circuit modification?

A: Yes. P2300SBLRP maintains identical electrical specifications across all critical parameters: off-state voltage, breakover voltage, on-state voltage, peak pulse current, and hold current. The DO-214AA package and surface mount configuration are identical. No circuit modification is required.

Q: What are the differences between P2300SBLRP and TB2300M-13-F?

A: Both parts meet core substitution criteria but have measurable differences. TB2300M-13-F has a 265V breakover voltage (5V higher), 4.6V on-state voltage (0.5V lower), and 50A peak pulse current at 10/1000µs (30A lower than the original 80A). TB2300M-13-F includes automotive-grade qualification and AEC-Q101 certification. P2300SBLRP provides exact electrical equivalence.

Q: Is TB2300M-13-F suitable for non-automotive applications?

A: Yes. TB2300M-13-F meets all RoHS3, MSL, and REACH compliance requirements for general industrial use. The automotive qualification is an additional certification that does not restrict use in non-automotive applications. However, verify that the parameter variations (265V breakover, 4.6V on-state, 50A at 10/1000µs) are acceptable for your specific circuit design.

Q: Are there packaging differences between the substitutes?

A: Both substitutes use DO-214AA (SMB) surface mount packaging, identical to the original TVB190NSB-L. P2300SBLRP is supplied in tape and reel format. Verify packaging format requirements for your procurement and assembly process.

Q: Why is TVB190NSB-L marked as obsolete?

A: The TVB190NSB-L is classified as obsolete by the manufacturer. P2300SBLRP and TB2300M-13-F are active production parts that fulfill the same functional and electrical requirements, ensuring long-term availability and supply chain continuity.

Q: What is the capacitance difference between the parts?

A: TVB190NSB-L has 56pF capacitance, P2300SBLRP has 50pF, and TB2300M-13-F has 60pF. These variations fall within typical manufacturing tolerances for TVS thyristors and do not affect substitution eligibility for standard transient overvoltage protection applications. Verify capacitance requirements if your circuit includes frequency-dependent filtering or impedance matching.