SMCJ110 Equivalent & Substitute Parts

Part Overview

The SMCJ110 is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional Zener diode operates with a reverse standoff voltage of 110V and provides clamping protection at 185.85V maximum. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued circuit protection functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMCJ110
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	110V
Voltage - Breakdown (Min)	115.65V
Voltage - Clamping (Max) @ Ipp	185.85V
Current - Peak Pulse (10/1000µs)	8.5A
Power - Peak Pulse	1500W
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AB, SMC
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SMCJ110 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 110V
Package / Case: DO-214AB, SMC (surface mount)
Unidirectional Channels: 1
Type: Zener
Applications: General Purpose

Allowable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: 177V to 196V (within acceptable protection envelope)
Current - Peak Pulse (10/1000µs): 8.4A to 16.95A (higher current ratings acceptable for same voltage class)
Power - Peak Pulse: 1500W to 3000W (higher power dissipation acceptable)
Operating Temperature: -55°C to -65°C minimum; 150°C to 175°C maximum (extended ranges acceptable)

Substitute parts maintain the 110V standoff voltage specification and DO-214AB package form factor, ensuring direct circuit compatibility. Variations in clamping voltage and peak current reflect different manufacturer specifications within the same protection class. Higher power ratings and extended temperature ranges provide equivalent or enhanced performance.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package / Case	Product Status
SMCJ110	Littelfuse Inc.	110V	185.85V	8.5A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Obsolete
SMCJ110A	Fairchild Semiconductor	110V	177V	8.4A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMCJ110A-13-F	Diodes Incorporated	110V	177V	8.4A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMCJ110A-TP	Micro Commercial Co	110V	177V	8.5A	1500W	-55°C ~ 175°C	DO-214AB, SMC	Active
SMCJ110AE3/TR13	Microchip Technology	110V	177V	8.4A	1500W	-65°C ~ 150°C	DO-214AB, SMC	Active
SMCJ110E3/TR13	Microchip Technology	110V	196V	7.7A	1500W	-65°C ~ 150°C	DO-214AB, SMC	Active
SMLJ110A	Bourns Inc.	110V	177V	16.8A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMLJ110A-TP	Micro Commercial Co	110V	177V	16.8A	3000W	-55°C ~ 175°C	DO-214AB, SMC	Active
TV15C111J-G	Comchip Technology	110V	177V	8.47A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active
TV30C111J-G	Comchip Technology	110V	177V	16.95A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, matching the original SMCJ110 specifications. Selection among substitutes depends on application requirements:

1500W Power Class (Direct Electrical Equivalents): SMCJ110A, SMCJ110A-13-F, SMCJ110A-TP, SMCJ110AE3/TR13, TV15C111J-G maintain the original 1500W peak pulse power specification with 8.4A to 8.5A peak current ratings. These parts provide equivalent protection performance for standard-current applications.

3000W Power Class (Enhanced Protection): SMLJ110A, SMLJ110A-TP, TV30C111J-G provide doubled power dissipation (3000W) with 16.8A to 16.95A peak current ratings. These parts are suitable for applications requiring higher transient energy absorption while maintaining the 110V standoff voltage.

Temperature Range Considerations: SMCJ110AE3/TR13 and SMCJ110E3/TR13 (Microchip Technology) extend the minimum operating temperature to -65°C. SMCJ110A-TP and SMLJ110A-TP (Micro Commercial Co) extend the maximum operating temperature to 175°C. Select based on specific thermal environment requirements.

Clamping Voltage Variation: SMCJ110E3/TR13 specifies 196V maximum clamping voltage compared to 177V in most alternatives. This represents acceptable variation within the 110V standoff class and does not preclude substitution for general-purpose protection applications.

Frequently Asked Questions (FAQ)

Q: Can SMCJ110A directly replace SMCJ110 in existing designs? A: Yes. SMCJ110A maintains identical reverse standoff voltage (110V), package form factor (DO-214AB, SMC), and power rating (1500W). The 177V clamping voltage is within acceptable tolerance for the 110V protection class. No circuit redesign is required.

Q: What is the difference between 1500W and 3000W rated parts? A: Power rating indicates peak pulse power dissipation capability. 3000W parts (SMLJ110A, SMLJ110A-TP, TV30C111J-G) handle twice the transient energy compared to 1500W parts. Select 3000W variants for applications with higher transient current exposure or repeated surge events.

Q: Are Comchip Technology TV15C111J-G and TV30C111J-G compatible with SMCJ110? A: Yes. Both Comchip parts maintain the 110V standoff voltage and DO-214AB package. TV15C111J-G is a 1500W equivalent; TV30C111J-G is a 3000W equivalent. Electrical performance is equivalent to corresponding Littelfuse and Fairchild alternatives.

Q: Does operating temperature range affect substitution compatibility? A: Operating temperature range does not affect electrical substitution compatibility. Extended ranges (-65°C minimum or 175°C maximum) provide additional design margin for extreme thermal environments but are not required for standard applications. Select based on circuit thermal specifications.

Q: Can I use a 3000W part where a 1500W part was specified? A: Yes. Higher power-rated parts provide equivalent or enhanced protection. SMLJ110A and TV30C111J-G are direct substitutes with doubled transient energy handling. No circuit modification is necessary; the higher rating provides additional safety margin.

Q: What packaging options are available for these substitutes? A: All substitute parts are supplied in DO-214AB (SMC) surface-mount package. Tape & Reel (TR) packaging is available for most variants (SMCJ110A-13-F, SMCJ110A-TP, SMCJ110AE3/TR13, SMCJ110E3/TR13, SMLJ110A, TV15C111J-G, TV30C111J-G). Bulk packaging is available for SMLJ110A-TP. Confirm packaging availability with supplier for production requirements.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original SMCJ110 environmental specifications.

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