SMLJ70CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMLJ70CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose transient voltage protection in surface-mount applications. The device features a 70V reverse standoff voltage rating with a 125V maximum clamping voltage and 24A peak pulse current capability. This component remains in active product status and is RoHS3 compliant. Substitute parts are identified where equivalent electrical characteristics and mechanical compatibility align with the main part specifications to support design flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMLJ70CE3/TR13
Manufacturer	Microchip Technology
Category	Transient Voltage Suppressors (TVS)
Voltage - Reverse Standoff (Typ)	70V
Voltage - Breakdown (Min)	77.8V
Voltage - Clamping (Max) @ Ipp	125V
Current - Peak Pulse (10/1000µs)	24A
Power - Peak Pulse	300W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AB, SMC
RoHS Status	RoHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the SMLJ70CE3/TR13 are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff: Must be 70V (identical to main part)
Voltage - Breakdown (Min): Must be 77.8V (identical to main part)
Package / Case: Must be DO-214AB / SMC (identical mounting and form factor)
Mounting Type: Must be Surface Mount (identical)
Bidirectional Channels: Must be 1 (identical)
Type: Must be Zener (identical)

Substitute parts are classified into two categories based on voltage clamping performance:

Category 1 — Direct electrical equivalents with 113V clamping voltage: SMCJ70CA, SMCJ70CA-13-F, SMCJ70CA-TP, SMLJ70CA, and 5.0SMDJ70CA. These parts maintain the same reverse standoff and breakdown specifications while operating at reduced clamping voltage.

Category 2 — Higher-performance substitute with 146V clamping voltage: SMCJ70CA-TR (STMicroelectronics). This part exceeds clamping voltage specifications and is suitable where increased voltage margin is required.

Category 3 — Peak pulse current variants: SMDJ70CA and 5.0SMDJ70CA offer higher peak pulse current ratings (26.6A and 44.3A respectively) while maintaining identical voltage standoff characteristics.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature Range	Package / Case	RoHS Status	Product Status
SMLJ70CE3/TR13	Microchip Technology	70V	77.8V	125V	24A	300W	-55°C ~ 150°C	DO-214AB, SMC	RoHS3 Compliant	Active
5.0SMDJ70CA	MDE Semiconductor Inc	70V	77.8V	113V	44.3A	5kW	-55°C ~ 150°C	DO-214AB, SMC	RoHS3 Compliant	Active
SMCJ70CA	Fairchild Semiconductor	70V	77.8V	113V	13.3A	1.5kW	-55°C ~ 150°C	DO-214AB, SMC	Not specified	Active
SMCJ70CA-13-F	Diodes Incorporated	70V	77.8V	113V	13.3A	1.5kW	-55°C ~ 150°C	DO-214AB, SMC	RoHS3 Compliant	Active
SMCJ70CA-TP	Micro Commercial Co	70V	77.8V	113V	13.3A	1.5kW	-55°C ~ 175°C	DO-214AB, SMC	RoHS3 Compliant	Active
SMCJ70CA-TR	STMicroelectronics	70V	77.8V	146V	69A	1.5kW	-55°C ~ 150°C	DO-214AB, SMC	RoHS3 Compliant	Active
SMDJ70CA	Alpha & Omega Semiconductor Inc.	70V	77.8V	113V	26.6A	3kW	-55°C ~ 150°C	DO-214AB, SMC	RoHS3 Compliant	Active
SMLJ70CA	Bourns Inc.	70V	77.8V	113V	26.6A	3kW	-55°C ~ 150°C	DO-214AB, SMC	RoHS3 Compliant	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status, ensuring long-term availability for production designs. Selection among the qualified substitutes is determined by application-specific requirements:

For Standard Replacement: SMCJ70CA-13-F (Diodes Incorporated) or SMLJ70CA (Bourns Inc.) provide direct electrical equivalence with 113V clamping voltage and are widely available with high inventory levels. Both parts carry RoHS3 compliance certification.

For Extended Temperature Operation: SMCJ70CA-TP (Micro Commercial Co) extends the upper operating temperature limit to 175°C while maintaining electrical equivalence, suitable for applications in elevated ambient conditions.

For Higher Peak Current Requirements: SMDJ70CA (Alpha & Omega Semiconductor Inc.) or 5.0SMDJ70CA (MDE Semiconductor Inc.) accommodate applications requiring peak pulse currents of 26.6A and 44.3A respectively, with corresponding increases in peak pulse power dissipation.

For Increased Voltage Margin: SMCJ70CA-TR (STMicroelectronics) provides a 146V maximum clamping voltage, offering enhanced protection margin in transient suppression applications, though this represents a deviation from the primary specification range.

All substitute parts comply with RoHS3 standards and maintain equivalent mechanical compatibility through identical DO-214AB / SMC packaging.

Frequently Asked Questions (FAQ)

Q: Can SMCJ70CA-13-F be used as a direct replacement for SMLJ70CE3/TR13?

A: Yes. Both parts share identical reverse standoff voltage (70V), breakdown voltage (77.8V), and DO-214AB SMC package form factor. The clamping voltage differential (113V vs. 125V) and peak pulse current (13.3A vs. 24A) do not prevent substitution where the application accommodates these reduced specifications. Compliance with RoHS3 and active product status are equivalent.

Q: What is the difference between 113V and 125V clamping voltage specifications?

A: The clamping voltage represents the maximum voltage across the TVS diode during transient suppression at peak pulse current. The SMLJ70CE3/TR13 clamps at 125V, while most substitute parts clamp at 113V. A lower clamping voltage provides tighter voltage control during transient events. Selection depends on whether the downstream circuit can tolerate the voltage differential.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All listed parts use the DO-214AB SMC package, which provides identical land pattern and mechanical compatibility. No PCB redesign is required for substitution.

Q: Does operating temperature range affect substitution suitability?

A: Yes, when application requirements specify extended temperature operation. SMCJ70CA-TP extends to -55°C ~ 175°C, while the main part and most substitutes are rated to -55°C ~ 150°C. Verify that your application temperature profile aligns with the selected part's operating range.

Q: What is the significance of the 5.0SMDJ70CA designation?

A: The "5.0" prefix indicates a 5kW peak pulse power rating, reflecting the highest power dissipation capability among the substitute parts listed. This variant accommodates applications with stringent transient energy requirements. Despite the higher power rating, the device maintains the same reverse standoff and breakdown voltage specifications.

Q: Are there any inventory or lead-time considerations for substitution?

A: Inventory levels vary across substitutes. SMCJ70CA-TP (75,172 pcs), SMCJ70CA (20,215 pcs), and SMDJ70CA (24,149 pcs) maintain high stock levels. Verify current availability with your supplier for design timeline alignment.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message