1.5SMC13 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 1.5SMC13 is a unidirectional transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 1500W peak pulse power rating, 11.1V reverse standoff voltage, and 19.11V maximum clamping voltage at peak pulse current. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs and production continuity.

Substiute Parts

1.5SMC13

Littelfuse Inc.In Stock: 9601.5SMC13 Datasheet

Current PartRFQ

1.5SMC13A

Taiwan Semiconductor CorporationIn Stock: 8541.5SMC13A Datasheet

DirectRFQ

1.5SMC13A

Taiwan Semiconductor CorporationIn Stock: 8541.5SMC13A Datasheet

DirectRFQ

SMCJ11A

Fairchild SemiconductorIn Stock: 12305SMCJ11A Datasheet

MFR RecommendedRFQ

SMCJ11AE3/TR13

Microchip TechnologyIn Stock: 821SMCJ11AE3/TR13 Datasheet

MFR RecommendedRFQ

SMLJ11A

Bourns Inc.In Stock: 15209SMLJ11A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1.5SMC13 is determined by the following critical parameters that must remain within acceptable tolerances:

Electrical Parameters:

• Reverse standoff voltage (Typ): 11V to 11.1V range
• Clamping voltage (Max) @ Ipp: 18.2V to 19.11V range
• Peak pulse current (10/1000µs): 82.4A to 86A range
• Peak pulse power: 1500W minimum (3000W acceptable for higher margin applications)

Mechanical Parameters:

• Unidirectional topology (1 channel)
• Surface mount package: DO-214AB / SMC form factor
• Operating temperature range: -55°C to 150°C minimum

Compliance Parameters:

• ROHS3 compliance required
• Active product status preferred for production continuity

All substitute parts listed maintain these electrical and mechanical specifications within the defined tolerance windows, ensuring functional equivalence in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

1.5SMC13A (Taiwan Semiconductor Corporation) Recommended as the primary direct replacement. Maintains identical reverse standoff voltage (11.1V), equivalent clamping voltage (18.2V), and matching 1500W power rating. Active product status ensures long-term availability. ROHS3 compliant. Available in Tape & Reel packaging for automated assembly.

SMCJ11A (Fairchild Semiconductor) Acceptable substitute with 11V reverse standoff voltage and 18.2V clamping voltage within tolerance. Peak pulse current of 82.5A meets specification. 1500W power rating maintained. Bulk packaging available for high-volume applications. Product status active.

SMCJ11AE3/TR13 (Microchip Technology) Qualified substitute offering extended operating temperature range (-65°C to 150°C). Electrical parameters align with specification: 11V standoff, 18.2V clamping, 82.4A peak pulse current. ROHS3 compliant with Tape & Reel packaging. Active product status.

SMLJ11A (Bourns Inc.) Alternative for applications requiring higher transient energy absorption. Provides 3000W peak pulse power (double the original specification) with 164.8A peak pulse current, maintaining 11V standoff and 18.2V clamping voltages. ROHS3 compliant. Suitable for designs with elevated overvoltage stress margins.

Frequently Asked Questions (FAQ)

Q: Can the 1.5SMC13A be used as a direct drop-in replacement for the 1.5SMC13? A: Yes. The 1.5SMC13A maintains identical reverse standoff voltage (11.1V) and equivalent clamping voltage (18.2V vs. 19.11V), with matching 1500W power rating and DO-214AB package. Both are ROHS3 compliant. The primary difference is active product status and Taiwan Semiconductor Corporation manufacturing.

Q: What is the difference between the 1.5SMC13A and SMCJ11A? A: Both are functionally equivalent within tolerance. The 1.5SMC13A maintains the exact 11.1V standoff voltage of the original part, while SMCJ11A operates at 11V standoff. Clamping voltages are identical at 18.2V. Peak pulse currents differ slightly (86A vs. 82.5A), both within acceptable range. SMCJ11A is available in bulk packaging; 1.5SMC13A in Tape & Reel.

Q: Why does SMLJ11A have different peak pulse current and power ratings? A: SMLJ11A is a higher-power variant within the same voltage class. It provides 164.8A peak pulse current and 3000W power rating compared to the original 84.6A and 1500W. This component is suitable for applications requiring greater transient energy absorption while maintaining the same voltage protection thresholds (11V standoff, 18.2V clamping).

Q: Are all substitute parts ROHS3 compliant? A: The 1.5SMC13A, SMCJ11AE3/TR13, and SMLJ11A are explicitly ROHS3 compliant. SMCJ11A compliance status is not specified in the provided data. Verify ROHS3 compliance with the supplier for SMCJ11A if regulatory compliance is required.

Q: What packaging options are available for production? A: 1.5SMC13A, SMCJ11AE3/TR13, and SMLJ11A are supplied in Tape & Reel (TR) packaging for automated assembly. SMCJ11A is available in bulk packaging. All components use DO-214AB (SMC) form factor.

Q: Can these parts be used interchangeably in existing designs? A: Yes, within the electrical tolerance windows defined by reverse standoff voltage (11V to 11.1V), clamping voltage (18.2V to 19.11V), and peak pulse current (82.4A to 86A). All substitute parts maintain the same surface-mount package and operating temperature range. Designs using SMLJ11A benefit from higher power margin but do not require circuit modification.