SMDJ8.0 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMDJ8.0 is a unidirectional transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features an 8V reverse standoff voltage with a 14.28V maximum clamping voltage and 220.6A peak pulse current capability in a DO-214AB (SMC) package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and field replacement requirements.

Substiute Parts

SMDJ8.0

Littelfuse Inc.In Stock: 900SMDJ8.0 Datasheet

Current PartRFQ

SMDJ8.0A

Alpha & Omega Semiconductor Inc.In Stock: 12370SMDJ8.0A Datasheet

DirectRFQ

SMCJ8.0A

Taiwan Semiconductor CorporationIn Stock: 9369SMCJ8.0A Datasheet

MFR RecommendedRFQ

SMCJ8.0A-TP

Micro Commercial CoIn Stock: 4182SMCJ8.0A-TP Datasheet

MFR RecommendedRFQ

SMCJ8.0AE3/TR13

Microchip TechnologyIn Stock: 1020SMCJ8.0AE3/TR13 Datasheet

MFR RecommendedRFQ

SMCJ8.5A-13-F

Diodes IncorporatedIn Stock: 1063SMCJ8.5A-13-F Datasheet

MFR RecommendedRFQ

SMLJ8.0A

Bourns Inc.In Stock: 12900SMLJ8.0A Datasheet

MFR RecommendedRFQ

SMLJ8.0A

Bourns Inc.In Stock: 12900SMLJ8.0A Datasheet

MFR RecommendedRFQ

SMLJ8.0AE3/TR13

Microchip TechnologyIn Stock: 787SMLJ8.0AE3/TR13 Datasheet

MFR RecommendedRFQ

TV15C8V0J-G

Comchip TechnologyIn Stock: 877TV15C8V0J-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMDJ8.0 is determined by the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 8V (or 8.5V maximum deviation) and breakdown voltage within the 8.42V to 8.89V range
• Clamping Voltage: Maximum clamping voltage at peak pulse current between 13.6V and 14.4V
• Peak Pulse Current: Minimum 104.2A; parts rated at 220.6A provide full compatibility
• Power Dissipation: Minimum 1500W; 3000W rated parts provide full compatibility
• Package: DO-214AB (SMC) surface-mount package required
• Mounting Type: Surface mount only
• Compliance: ROHS3 compliance mandatory

Substitute parts are grouped into two categories based on peak pulse current and power dissipation ratings:

Category A (Full Electrical Equivalents): Parts with 220.6A peak pulse current and 3000W power rating

• SMDJ8.0A (Alpha & Omega Semiconductor Inc.)
• SMLJ8.0A (Bourns Inc.)
• SMLJ8.0AE3/TR13 (Microchip Technology)

Category B (Reduced Current Equivalents): Parts with 104.2A to 115A peak pulse current and 1500W power rating

• SMCJ8.0A (Taiwan Semiconductor Corporation)
• SMCJ8.0A-TP (Micro Commercial Co)
• SMCJ8.0AE3/TR13 (Microchip Technology)
• SMCJ8.5A-13-F (Diodes Incorporated)
• TV15C8V0J-G (Comchip Technology)

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SMDJ8.0A (Alpha & Omega Semiconductor Inc.) or SMLJ8.0A (Bourns Inc.)

Both parts maintain full electrical equivalence to the SMDJ8.0 with 220.6A peak pulse current and 3000W power dissipation. Both are active products with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). SMDJ8.0A offers the narrowest operating temperature range (-55°C to 150°C), while SMLJ8.0A provides identical electrical performance with REACH Affected status noted.

Secondary Recommendation: SMCJ8.0A-TP (Micro Commercial Co) or SMCJ8.0AE3/TR13 (Microchip Technology)

These parts reduce peak pulse current to 110.3A and power dissipation to 1500W. Selection is appropriate only when circuit design confirms that peak transient currents do not exceed 110.3A. SMCJ8.0A-TP extends operating temperature to 175°C. SMCJ8.0AE3/TR13 maintains the original -65°C lower temperature limit.

Alternative Consideration: SMCJ8.5A-13-F (Diodes Incorporated)

This part increases reverse standoff voltage to 8.5V and clamping voltage to 14.4V. Selection requires circuit verification that the higher voltage ratings remain within system protection thresholds.

Not Recommended: SMLJ8.0AE3/TR13 (Microchip Technology)

This part exhibits significantly reduced power dissipation (300W versus 3000W), making it unsuitable as a direct replacement for the SMDJ8.0.

Frequently Asked Questions (FAQ)

Q: Can SMCJ8.0A replace SMDJ8.0 in all applications?

A: SMCJ8.0A is electrically compatible for voltage ratings but reduces peak pulse current from 220.6A to 115A and power dissipation from 3000W to 1500W. Substitution is valid only when circuit transient current analysis confirms peak pulses remain below 115A.

Q: What is the difference between SMDJ8.0A and SMLJ8.0A?

A: Both parts provide identical electrical performance (8V standoff, 13.6V clamping, 220.6A peak current, 3000W power). SMDJ8.0A is manufactured by Alpha & Omega Semiconductor Inc., while SMLJ8.0A is manufactured by Bourns Inc. Selection depends on supply chain availability and preferred supplier qualification.

Q: Why does SMLJ8.0AE3/TR13 show 300W power dissipation instead of 3000W?

A: This appears to be a data entry discrepancy in the provided specifications. This part should not be selected as a primary replacement due to this specification anomaly.

Q: Are all substitute parts available in tape and reel packaging?

A: Most substitute parts are available in tape and reel (TR) packaging. SMCJ8.0A (Taiwan Semiconductor Corporation) and SMLJ8.0A (Bourns Inc.) do not specify packaging format in the provided data. Confirm packaging availability with suppliers before final selection.

Q: Does operating temperature range affect substitution suitability?

A: The SMDJ8.0 operates from -65°C to 150°C. Most substitutes operate from -55°C to 150°C, reducing the lower temperature limit by 10°C. SMCJ8.0A-TP extends the upper limit to 175°C. Substitution is valid when circuit operating conditions remain within the substitute part's temperature range.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant. SMLJ8.0A (Bourns Inc.) carries REACH Affected status, while other parts are REACH Unaffected. Verify compliance requirements for your specific application and region.