SMDJ110A-T7 Equivalent & Substitute Parts

Part Overview

The SMDJ110A-T7 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a reverse standoff voltage of 110V and provides clamping at 177V maximum, with a peak pulse current rating of 16.9A and peak pulse power of 3000W. The part is active in production status and RoHS3 compliant.

Substitute parts are identified when electrical parameters remain within acceptable tolerances for the application while maintaining mechanical compatibility with the DO-214AB (SMC) package footprint.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	110	V
Voltage - Breakdown (Min)	122	V
Voltage - Clamping (Max) @ Ipp	177	V
Current - Peak Pulse (10/1000µs)	16.9	A
Power - Peak Pulse	3000	W
Package / Case	DO-214AB, SMC	—
Operating Temperature Range	-65 to 150	°C
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the SMDJ110A-T7 are qualified based on the following criteria:

Identical reverse standoff voltage: 110V (Typ)
Identical breakdown voltage minimum: 122V
Identical clamping voltage maximum: 177V @ Ipp
Compatible package: DO-214AB (SMC) surface mount
Unidirectional configuration with single channel
General-purpose application classification
Active product status

Peak pulse current and power ratings vary among substitutes. The SMDJ110A-T7 and SMLJ110A both deliver 16.8–16.9A peak pulse current and 3000W peak pulse power. Alternative substitutes (SMCJ110A variants) provide reduced peak pulse current (8.4–8.5A) and power (1500W), suitable for applications with lower transient energy requirements while maintaining voltage protection parameters.

Parameter Comparison

Parameter	SMDJ110A-T7 (Littelfuse)	SMCJ110A (Fairchild)	SMCJ110A-E3/57T (Vishay)	SMCJ110A-TP (MCC)	SMLJ110A (Bourns)
Manufacturer	Littelfuse Inc.	Fairchild Semiconductor	Vishay General Semiconductor	Micro Commercial Co	Bourns Inc.
Voltage - Reverse Standoff (Typ)	110V	110V	110V	110V	110V
Voltage - Breakdown (Min)	122V	122V	122V	122V	122V
Voltage - Clamping (Max) @ Ipp	177V	177V	177V	177V	177V
Current - Peak Pulse (10/1000µs)	16.9A	8.4A	8.5A	8.5A	16.8A
Power - Peak Pulse	3000W	1500W	1500W	1500W	3000W
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Operating Temperature Range	-65 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 175°C	-55 to 150°C
Type	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1
RoHS Status	ROHS3 Compliant	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain identical voltage protection characteristics (110V standoff, 122V breakdown minimum, 177V clamping maximum) and are packaged in the DO-214AB (SMC) surface-mount format, ensuring mechanical and electrical compatibility.

High-Current Applications (≥16.8A peak pulse): SMLJ110A (Bourns Inc.) is the primary substitute, delivering 16.8A peak pulse current and 3000W peak pulse power equivalent to the SMDJ110A-T7. Both parts are RoHS3 compliant with MSL 1 rating. The SMLJ110A operates across -55 to 150°C, compared to the SMDJ110A-T7 range of -65 to 150°C.

Standard-Current Applications (≤8.5A peak pulse): SMCJ110A variants from Fairchild Semiconductor, Vishay General Semiconductor (SMCJ110A-E3/57T), and Micro Commercial Co (SMCJ110A-TP) are suitable. These parts deliver 8.4–8.5A peak pulse current and 1500W peak pulse power. All three are active products with RoHS3 compliance and MSL 1 rating. The SMCJ110A-TP extends the operating temperature range to -55 to 175°C.

All substitute parts carry active product status and meet RoHS3 compliance requirements, supporting long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can SMCJ110A variants replace SMDJ110A-T7 in all applications?

A: SMCJ110A variants maintain identical voltage parameters (110V standoff, 177V clamping) and package compatibility. However, they deliver reduced peak pulse current (8.4–8.5A versus 16.9A) and power (1500W versus 3000W). Substitution is valid only when the application transient energy requirement does not exceed 1500W peak pulse power.

Q: What is the difference between SMLJ110A and SMCJ110A?

A: Both maintain identical voltage ratings and DO-214AB packaging. The SMLJ110A delivers 16.8A peak pulse current and 3000W power, matching the SMDJ110A-T7 performance envelope. The SMCJ110A delivers 8.4–8.5A and 1500W. Selection depends on transient energy requirements of the protected circuit.

Q: Are all substitutes RoHS3 compliant?

A: SMDJ110A-T7, SMCJ110A-E3/57T, SMCJ110A-TP, and SMLJ110A are confirmed RoHS3 compliant. Fairchild Semiconductor SMCJ110A compliance status is not specified in available data.

Q: Does operating temperature range affect substitution?

A: The SMDJ110A-T7 operates -65 to 150°C. Substitutes operate -55 to 150°C (standard) or -55 to 175°C (SMCJ110A-TP). If the application requires operation below -55°C, the SMDJ110A-T7 is required. For extended high-temperature operation above 150°C, SMCJ110A-TP is suitable.

Q: Is the DO-214AB package identical across all parts?

A: Yes. All listed parts use DO-214AB (SMC) surface-mount packaging, ensuring footprint and land pattern compatibility on PCB assemblies.

Q: What is the MSL rating significance?

A: All parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard PCB assembly processes and storage conditions apply without special handling requirements.

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