SMDJ64C Equivalent & Substitute Parts

Part Overview

The SMDJ64C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional zener diode operates with a 64V reverse standoff voltage and provides 3000W peak pulse power dissipation in a DO-214AB (SMC) package. The SMDJ64C is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SMDJ64C

Littelfuse Inc.In Stock: 938SMDJ64C Datasheet

Current PartRFQ

SMDJ64CA

Alpha & Omega Semiconductor Inc.In Stock: 101359SMDJ64CA Datasheet

DirectRFQ

SMCJ58CE3/TR13

Microchip TechnologyIn Stock: 807SMCJ58CE3/TR13 Datasheet

MFR RecommendedRFQ

SMCJ64CA

MeritekIn Stock: 9946SMCJ64CA Datasheet

MFR RecommendedRFQ

SMCJ64CA

MeritekIn Stock: 9946SMCJ64CA Datasheet

MFR RecommendedRFQ

SMCJ64CA-TP

Micro Commercial CoIn Stock: 2862SMCJ64CA-TP Datasheet

MFR RecommendedRFQ

SMCJ64CAE3/TR13

Microchip TechnologyIn Stock: 905SMCJ64CAE3/TR13 Datasheet

MFR RecommendedRFQ

SMLJ58CE3/TR13

Microchip TechnologyIn Stock: 1072SMLJ58CE3/TR13 Datasheet

MFR RecommendedRFQ

SMLJ64CA

Bourns Inc.In Stock: 7640SMLJ64CA Datasheet

MFR RecommendedRFQ

SMLJ64CA-TP

Micro Commercial CoIn Stock: 1162SMLJ64CA-TP Datasheet

MFR RecommendedRFQ

SMLJ64CAE3/TR13

Microchip TechnologyIn Stock: 837SMLJ64CAE3/TR13 Datasheet

MFR RecommendedRFQ

TV30C640JB-G

Comchip TechnologyIn Stock: 916TV30C640JB-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMDJ64C is determined by the following electrical and mechanical parameters:

• Voltage - Reverse Standoff: Must be 64V (±tolerance)
• Package / Case: Must be DO-214AB (SMC) for mechanical and thermal compatibility
• Mounting Type: Must be Surface Mount
• Bidirectional Channels: Must be 1
• Type: Must be Zener
• Power - Peak Pulse: Minimum 3000W (3kW) for equivalent performance
• Current - Peak Pulse (10/1000µs): Minimum 29.1A for equivalent performance

Substitute parts are grouped into two categories based on these criteria:

Category A - Direct Electrical Equivalents (3000W, 29+ A): Parts meeting all electrical performance requirements with 64V standoff voltage and 3000W peak pulse power.

Category B - Reduced Performance Alternatives (1500W, 14-15A): Parts with 64V standoff voltage but reduced power and current ratings, suitable only for lower-energy transient applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Full Electrical Equivalence)

SMDJ64CA (Alpha & Omega Semiconductor Inc.) and SMLJ64CA (Bourns Inc.) are the preferred direct substitutes. Both maintain the 64V reverse standoff voltage, 29.1-29.2A peak pulse current, and 3000W peak pulse power rating. Both are active products with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). SMDJ64CA offers the highest inventory availability (101,300 pcs).

Secondary Substitutes (Packaged Variants)

SMLJ64CA-TP (Micro Commercial Co) and SMLJ64CAE3/TR13 (Microchip Technology) provide the same 64V/29.2A electrical performance in tape & reel packaging. SMLJ64CA-TP extends operating temperature to 175°C. Note that SMLJ64CAE3/TR13 is rated at 300W peak pulse power, not 3000W, and is suitable only for lower-energy applications.

Reduced Performance Alternatives

SMCJ64CA (Meritek), SMCJ64CA-TP (Micro Commercial Co), and SMCJ64CAE3/TR13 (Microchip Technology) maintain 64V standoff voltage but provide only 1500W peak pulse power and 14.56-14.6A peak pulse current. These are suitable only for applications with lower transient energy requirements.

Lower Voltage Alternatives

SMCJ58CE3/TR13 and SMLJ58CE3/TR13 operate at 58V reverse standoff voltage. These are not direct substitutes for 64V applications and introduce voltage margin reduction.

Frequently Asked Questions (FAQ)

Q: Can SMCJ64CA replace SMDJ64C in all applications?

A: SMCJ64CA maintains the 64V reverse standoff voltage and DO-214AB package compatibility. However, it provides only 1500W peak pulse power versus the original 3000W rating. Use SMCJ64CA only in applications where peak transient energy is 1500W or lower.

Q: What is the difference between SMDJ64CA and SMLJ64CA?

A: Both provide identical electrical performance (64V, 29.2A, 3000W). The primary difference is manufacturer: SMDJ64CA is from Alpha & Omega Semiconductor Inc., while SMLJ64CA is from Bourns Inc. Selection may depend on supply chain availability and preferred supplier qualification.

Q: Are tape & reel packaged parts (SMLJ64CA-TP, SMCJ64CA-TP) electrically equivalent to bulk packaged versions?

A: Yes. Tape & reel packaging affects only handling and assembly logistics, not electrical performance. SMLJ64CA-TP and SMLJ64CA are electrically identical; SMCJ64CA-TP and SMCJ64CA are electrically identical.

Q: Can I use a 58V part (SMCJ58CE3/TR13 or SMLJ58CE3/TR13) instead of a 64V part?

A: No. The 58V reverse standoff voltage reduces the protection margin by 6V. This creates risk of premature device activation in circuits designed for 64V protection thresholds.

Q: Why does SMLJ64CAE3/TR13 show 300W instead of 3000W?

A: This is a data entry discrepancy in the provided specifications. Verify the actual power rating with the manufacturer datasheet before selection, as the 300W rating appears inconsistent with the 29.2A peak pulse current specification.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed are ROHS3 compliant. Moisture sensitivity level is MSL 1 (Unlimited) for all parts. REACH status varies by manufacturer; verify specific REACH compliance requirements for your application region.

Q: Does operating temperature range affect substitution suitability?

A: Operating temperature range does not determine substitution compatibility for this product category. However, SMLJ64CA-TP extends to 175°C versus 150°C for most alternatives, providing additional thermal margin in high-temperature environments.