SMDJ16CA Equivalent & Substitute Parts

Part Overview

The SMDJ16CA is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 16V reverse standoff voltage and 26V maximum clamping voltage, delivering 115.4A peak pulse current in a DO-214AB (SMC) package. The part is active in production and ROHS3 compliant, making it suitable for modern electronic designs requiring transient suppression.

Equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from multiple qualified manufacturers offering identical or functionally compatible specifications.

Substiute Parts

SMDJ16CA

Littelfuse Inc.In Stock: 3215SMDJ16CA Datasheet

Current PartRFQ

3SMC16CA TR13 PBFREE

Central Semiconductor CorpIn Stock: 38443SMC16CA TR13 PBFREE Datasheet

DirectRFQ

SM30T19CAY

STMicroelectronicsIn Stock: 3237SM30T19CAY Datasheet

DirectRFQ

SMCJ16CA

MDDIn Stock: 26449SMCJ16CA Datasheet

MFR RecommendedRFQ

SMCJ16CA-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 34406SMCJ16CA-E3/57T Datasheet

MFR RecommendedRFQ

SMCJ16CA-TP

Micro Commercial CoIn Stock: 3803SMCJ16CA-TP Datasheet

MFR RecommendedRFQ

SMDJE16CA

Eaton - Electronics DivisionIn Stock: 8903SMDJE16CA Datasheet

MFR RecommendedRFQ

SMLJ16CA

Bourns Inc.In Stock: 5322SMLJ16CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMDJ16CA is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 16V
• Voltage - Breakdown (Min): 17.8V
• Voltage - Clamping (Max) @ Ipp: 26V
• Bidirectional Channels: 1
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Type: Zener

Substitute parts are grouped into two categories based on peak pulse current capability:

Category A - Full Current Rating (115.4A): Parts maintaining the original 115.4A peak pulse current and 3000W power dissipation. These provide direct functional equivalence with no derating required.

Category B - Reduced Current Rating (57.7A): Parts with 57.7A peak pulse current and 1500W power dissipation. These are suitable for applications where the full 115.4A capability is not required, provided system transient energy remains within the 1500W limit.

All substitute parts maintain identical voltage specifications (16V standoff, 26V clamp) and package form factor, ensuring mechanical and electrical compatibility in DO-214AB (SMC) footprints.

Parameter Comparison

Engineering Selection Recommendations

Category A Substitutes (115.4A, 3000W) — Direct equivalents with full current rating:

• 3SMC16CA TR13 PBFREE (Central Semiconductor Corp): Maintains all electrical specifications and operating temperature range of the original SMDJ16CA. ROHS3 compliant. Suitable for direct replacement in applications requiring full 115.4A capability.

• SM30T19CAY (STMicroelectronics): Extends operating temperature range to -55°C to 175°C and includes AEC-Q101 automotive qualification. ROHS3 compliant. Recommended for automotive or extended-temperature applications where the broader temperature range provides design margin.

• SMDJE16CA (Eaton - Electronics Division): Maintains 115.4A rating and 3000W power dissipation. RoHS compliant (note: not ROHS3 designation). Suitable for general-purpose applications where RoHS compliance is required.

• SMLJ16CA (Bourns Inc.): Delivers full 115.4A peak pulse current and 3000W power dissipation. ROHS3 compliant. Suitable for direct replacement in applications requiring maximum transient suppression capability.

Category B Substitutes (57.7A, 1500W) — Reduced current rating:

• SMCJ16CA (MDD): Provides 57.7A peak pulse current and 1500W power dissipation. ROHS3 compliant. Suitable for applications where transient energy is limited to 1500W and full 115.4A capability is not required.

• SMCJ16CA-E3/57T (Vishay General Semiconductor - Diodes Division): Delivers 57.7A peak pulse current within TransZorb® series. ROHS3 compliant. Suitable for applications with reduced transient energy requirements.

• SMCJ16CA-TP (Micro Commercial Co): Provides 57.7A peak pulse current and extends operating temperature to -55°C to 175°C. ROHS3 compliant. Recommended for applications requiring reduced current rating with extended temperature range.

All substitute parts maintain identical voltage specifications and DO-214AB (SMC) package compatibility, ensuring mechanical fit and electrical function within the same circuit footprint.

Frequently Asked Questions (FAQ)

Q: Can I use a Category B substitute (57.7A) in place of the original SMDJ16CA (115.4A)?

A: Category B substitutes are compatible only if the application's transient energy remains within the 1500W power dissipation limit. If the system generates transient pulses exceeding 1500W, the reduced current rating may result in inadequate clamping performance. Verify transient energy calculations before substitution.

Q: Are all substitute parts mechanically compatible with the SMDJ16CA footprint?

A: Yes. All listed substitutes use the DO-214AB (SMC) package, ensuring identical mechanical fit and PCB footprint compatibility. No layout modifications are required.

Q: What is the difference between ROHS3 and RoHS compliance?

A: ROHS3 represents compliance with the latest Restriction of Hazardous Substances directive. The SMDJE16CA is marked as RoHS compliant (without the "3" designation), indicating compliance with an earlier version of the directive. Both are acceptable for RoHS-regulated applications; ROHS3 represents the current standard.

Q: Which substitute offers the widest operating temperature range?

A: The SM30T19CAY (STMicroelectronics) and SMCJ16CA-TP (Micro Commercial Co) both extend to -55°C to 175°C, compared to the original SMDJ16CA range of -65°C to 150°C. The SM30T19CAY provides the highest upper temperature limit at 175°C.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided all parts in a given circuit meet the application's voltage and current requirements. Mixing Category A and Category B parts in different protection circuits is acceptable if each circuit's transient energy is matched to the respective part's power rating.

Q: Is the SM30T19CAY suitable for automotive applications?

A: Yes. The SM30T19CAY carries AEC-Q101 automotive qualification and is part of the STMicroelectronics TRANSIL™ series, making it suitable for automotive-grade transient suppression applications.