SMLJ45CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMLJ45CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a reverse standoff voltage of 45V and provides clamping at 80.3V maximum, with a peak pulse current rating of 37.4A. The component is housed in a DO-214AB (SMC) package and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

The SMLJ45CE3/TR13 maintains active product status with 715 units currently in stock. Equivalent and substitute parts are identified based on matching electrical parameters (reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current) and mechanical compatibility (DO-214AB surface-mount package). Substitute parts enable design flexibility, inventory optimization, and supply chain continuity while maintaining functional equivalence within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	SMLJ45CE3/TR13	—
Manufacturer	Microchip Technology	—
Category	Transient Voltage Suppressors (TVS)	—
Type	Zener	—
Bidirectional Channels	1	—
Voltage - Reverse Standoff (Typ)	45	V
Voltage - Breakdown (Min)	50	V
Voltage - Clamping (Max) @ Ipp	80.3	V
Current - Peak Pulse (10/1000µs)	37.4	A
Power - Peak Pulse	300	W
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—
Product Status	Active	—

Substitute Part Grouping Explanation

Substitute parts for the SMLJ45CE3/TR13 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 45V
Voltage - Breakdown (Min): 50V
Package / Case: DO-214AB, SMC (surface-mount compatibility)
Type: Zener (bidirectional TVS diode)
Mounting Type: Surface Mount

Allowable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: Substitute parts may clamp at lower voltages (72.7V is acceptable as it provides superior transient suppression)
Current - Peak Pulse (10/1000µs): Substitute parts with equal or higher peak pulse current ratings are functionally equivalent
Power - Peak Pulse: Higher power ratings indicate enhanced surge handling capability
Operating Temperature Range: Substitute parts with equal or wider temperature ranges are acceptable

All substitute parts listed maintain RoHS3 compliance, MSL 1 rating, and active product status. Packaging format (Tape & Reel or Cut Tape) does not affect electrical equivalence.

Parameter Comparison

Parameter	SMLJ45CE3/TR13 (Main)	5.0SMDJ45CA	SMCJ45CA	SMCJ45CA-13-F	SMCJ45CA-TP	SMDJ45CA
Manufacturer	Microchip Technology	MDE Semiconductor Inc	MDD	Diodes Incorporated	Micro Commercial Co	Alpha & Omega Semiconductor Inc.
Voltage - Reverse Standoff (Typ)	45V	45V	45V	45V	45V	45V
Voltage - Breakdown (Min)	50V	50V	50V	50V	50V	50V
Voltage - Clamping (Max) @ Ipp	80.3V	72.7V	72.7V	72.7V	72.7V	72.7V
Current - Peak Pulse (10/1000µs)	37.4A	68.8A	20.6A	20.6A	20.6A	41.3A
Power - Peak Pulse	300W	5000W	1500W	1500W	1500W	3000W
Operating Temperature Range	-55 to 150°C	-55 to 150°C	-50 to 150°C	-55 to 150°C	-55 to 175°C	-55 to 150°C
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain functional equivalence to the SMLJ45CE3/TR13 based on matching reverse standoff voltage (45V), breakdown voltage (50V minimum), and DO-214AB surface-mount package compatibility. Selection among substitute parts should be based on the following criteria:

Peak Pulse Current and Power Handling:

5.0SMDJ45CA (68.8A, 5kW): Highest surge capacity; suitable for applications requiring maximum transient energy absorption
SMDJ45CA (41.3A, 3kW): Moderate-to-high surge capacity; exceeds original part specifications
SMLJ45CE3/TR13 (37.4A, 300W): Original specification baseline
SMCJ45CA, SMCJ45CA-13-F, SMCJ45CA-TP (20.6A, 1.5kW): Lower surge capacity; suitable for lower-energy transient environments

Temperature Operating Range:

SMCJ45CA-TP extends to 175°C maximum junction temperature, providing enhanced thermal margin
All other parts operate to 150°C or 155°C, meeting standard industrial requirements

Compliance and Certifications: All substitute parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity). All maintain active product status with confirmed inventory availability.

Packaging Format:

Tape & Reel (TR) format: SMLJ45CE3/TR13, 5.0SMDJ45CA, SMCJ45CA, SMCJ45CA-TP, SMDJ45CA
Cut Tape (CT) & Digi-Reel®: SMCJ45CA-13-F

Frequently Asked Questions (FAQ)

Q1: Can SMCJ45CA substitute for SMLJ45CE3/TR13 in my circuit?

A: Yes. Both parts share identical reverse standoff voltage (45V), breakdown voltage (50V minimum), and DO-214AB package. The SMCJ45CA clamps at 72.7V versus 80.3V for the original part, providing superior transient suppression. Peak pulse current is lower (20.6A vs. 37.4A), so verify your circuit's transient energy does not exceed 1500W peak pulse power.

Q2: What is the difference between 5.0SMDJ45CA and SMDJ45CA?

A: Both are 45V TVS diodes in DO-214AB packages with identical standoff and breakdown voltages. The 5.0SMDJ45CA (MDE Semiconductor) handles 68.8A peak pulse and 5kW power. The SMDJ45CA (Alpha & Omega Semiconductor) handles 41.3A peak pulse and 3kW power. Select based on your circuit's transient surge magnitude.

Q3: Does operating temperature range affect substitution?

A: Operating temperature range does not prevent substitution. SMCJ45CA operates to 150°C; SMCJ45CA-TP extends to 175°C. If your application requires operation above 150°C, select SMCJ45CA-TP. All parts maintain specified electrical parameters within their rated temperature ranges.

Q4: Are there packaging differences between substitute parts?

A: Yes. Most substitute parts are supplied in Tape & Reel (TR) format. SMCJ45CA-13-F is supplied in Cut Tape (CT) & Digi-Reel® format. Electrical performance is identical; packaging format affects only handling and assembly logistics.

Q5: Which substitute part provides the best transient protection?

A: The 5.0SMDJ45CA provides the highest transient energy absorption (5kW peak pulse, 68.8A peak current). For applications with severe surge conditions, this part offers maximum protection margin. For standard industrial applications, SMDJ45CA (3kW) or the original SMLJ45CE3/TR13 (300W) are appropriate.

Q6: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the compliance status of the SMLJ45CE3/TR13.

Q7: Can I use a substitute part with lower peak pulse current?

A: Substitution with lower peak pulse current (such as SMCJ45CA at 20.6A) is only appropriate if your circuit's transient surge current does not exceed the substitute part's rating. Exceeding the peak pulse current specification may cause device failure or reduced protection effectiveness.

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