SMBJ110 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMBJ110 is a unidirectional transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component operates with a reverse standoff voltage of 110V and provides clamping at 185.85V maximum. The SMBJ110 is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

SMBJ110

Littelfuse Inc.In Stock: 1147SMBJ110 Datasheet

Current PartRFQ

SMBJ110A

MDDIn Stock: 47498SMBJ110A Datasheet

MFR RecommendedRFQ

SMBJ110A

MDDIn Stock: 47498SMBJ110A Datasheet

MFR RecommendedRFQ

SMBJ110A

MDDIn Stock: 47498SMBJ110A Datasheet

MFR RecommendedRFQ

SMBJ110A-13-F

Diodes IncorporatedIn Stock: 4753SMBJ110A-13-F Datasheet

MFR RecommendedRFQ

SMBJ110A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1235SMBJ110A-E3/5B Datasheet

MFR RecommendedRFQ

SMBJ110E3/TR13

Microchip TechnologyIn Stock: 1185SMBJ110E3/TR13 Datasheet

MFR RecommendedRFQ

TV06B111J-HF

Comchip TechnologyIn Stock: 822TV06B111J-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ110 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 110V
• Unidirectional Channels: 1
• Current - Peak Pulse (10/1000µs): 3.4A (or equivalent)
• Power - Peak Pulse: 600W
• Voltage - Clamping (Max) @ Ipp: within acceptable range for application
• Type: Zener

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Package / Case: DO-214AA, SMB
• Supplier Device Package: DO-214AA (SMBJ) or SMB/DO-214AA

Compliance & Certification:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain the 110V reverse standoff voltage specification and surface mount DO-214AA/SMB package format. Variations in clamping voltage (177V to 196V) and peak pulse current (3.0A to 3.4A) remain within acceptable tolerance ranges for general-purpose transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are classified as active products with ROHS3 compliance and MSL 1 rating, ensuring regulatory alignment and manufacturing continuity. The following selection guidance applies:

Primary Substitutes (Highest Compatibility): SMBJ110A (MDD), SMBJ110A-13-F (Diodes Incorporated), SMBJ110A-E3/5B (Vishay), and TV06B111J-HF (Comchip) maintain electrical parameters within the specified tolerance envelope. These parts feature clamping voltages of 177V and peak pulse currents of 3.39A to 3.4A, providing direct functional equivalence to the original SMBJ110.

Secondary Substitute (Extended Clamping Range): SMBJ110E3/TR13 (Microchip) operates with a maximum clamping voltage of 196V and peak pulse current of 3A. This part remains electrically compatible for general-purpose transient suppression but exhibits higher clamping voltage characteristics.

Temperature Operating Range Consideration: SMBJ110 and SMBJ110E3/TR13 support the extended temperature range of -65°C to 150°C. SMBJ110A-13-F and SMBJ110A-E3/5B operate across -55°C to 150°C. SMBJ110A (MDD) operates across -50°C to 150°C. Selection should account for application-specific temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can SMBJ110A (MDD) directly replace the obsolete SMBJ110 (Littelfuse)? A: Yes. Both parts maintain 110V reverse standoff voltage, 3.4A peak pulse current, 600W power dissipation, and DO-214AA/SMB surface mount packaging. The clamping voltage difference (177V vs. 185.85V) falls within acceptable tolerance for general-purpose applications.

Q: What is the significance of the voltage clamping variation between substitute parts? A: Clamping voltage determines the maximum transient voltage presented to protected circuitry. SMBJ110A variants clamp at 177V, while SMBJ110E3/TR13 clamps at 196V. Selection depends on the protected circuit's maximum tolerable voltage specification. Lower clamping voltage provides tighter protection margins.

Q: Are all substitute parts compatible with the original DO-214AA/SMB footprint? A: Yes. All identified substitutes utilize DO-214AA (SMB) surface mount packaging, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Q: Does operating temperature range affect part selection? A: Operating temperature range should be evaluated against application requirements. SMBJ110 and SMBJ110E3/TR13 support -65°C to 150°C operation. SMBJ110A-13-F and SMBJ110A-E3/5B support -55°C to 150°C. SMBJ110A (MDD) supports -50°C to 150°C. Applications requiring extended low-temperature operation should prioritize parts with -65°C minimum rating.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All identified substitute parts carry ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, meeting current regulatory requirements and manufacturing standards.

Q: What is the difference between SMBJ110A variants from different manufacturers? A: SMBJ110A is offered by multiple manufacturers (MDD, Diodes Incorporated, Vishay) with identical electrical specifications (110V standoff, 177V clamping, 3.4A peak pulse). Differences exist in packaging format (Tape & Reel vs. Cut Tape), operating temperature range, and availability. Selection may be driven by supply chain, packaging requirements, or preferred supplier relationships.

Q: Can SMBJ110E3/TR13 be used in applications designed for SMBJ110? A: SMBJ110E3/TR13 maintains the 110V reverse standoff voltage and 600W power rating. However, its 196V clamping voltage is higher than the original 185.85V specification. This part is suitable for applications where higher clamping voltage is acceptable or beneficial for extended transient margin.