LCE70A Equivalent & Substitute Parts

Part Overview

The LCE70A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This through-hole component operates across a temperature range of -65°C to 175°C and is RoHS3 compliant. The part is currently in active production status with 985 units in stock. Equivalent and substitute parts are identified when electrical parameters—specifically reverse standoff voltage, clamping voltage, peak pulse current, and power dissipation—fall within acceptable tolerances for the application, and when mechanical compatibility (package type, mounting method) can be maintained or adapted.

Substiute Parts

LCE70A

Littelfuse Inc.In Stock: 1068LCE70A Datasheet

Current PartRFQ

5KP70A

Littelfuse Inc.In Stock: 48135KP70A Datasheet

MFR RecommendedRFQ

1.5KE68A-TP

Micro Commercial CoIn Stock: 16641.5KE68A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by alignment of the following critical electrical parameters:

• Reverse Standoff Voltage (VR): Must match the primary circuit protection requirement. The LCE70A specifies 70V typical.
• Clamping Voltage (VC): Determines the maximum transient voltage presented to protected circuitry. The LCE70A clamps at 113V maximum.
• Peak Pulse Current (Ipp): Indicates the surge current the device can safely dissipate. The LCE70A handles 13.3A.
• Power Dissipation (Ppk): The LCE70A dissipates 1500W peak pulse power.
• Package Compatibility: Through-hole axial packages (DO-201, DO-27, P600) are mechanically compatible in most applications.
• Unidirectional Configuration: Both substitute parts maintain single-channel unidirectional topology.

The identified substitutes maintain the 70V reverse standoff voltage and 113V clamping voltage specifications. Variations in peak pulse current and power dissipation reflect different package geometries and thermal characteristics, which may be acceptable depending on application thermal management and surge profile requirements.

Parameter Comparison

Engineering Selection Recommendations

5KP70A (Littelfuse Inc.): This substitute maintains identical reverse standoff voltage (70V) and clamping voltage (113V) specifications as the LCE70A. The 5KP70A offers higher peak pulse current (45.1A) and power dissipation (5000W), making it suitable for applications requiring greater transient energy absorption. The P600 package is through-hole axial compatible. Both parts are RoHS3 compliant and in active production. The 5KP70A operates across -55°C to 175°C, which covers the primary operating range of the LCE70A.

1.5KE68A-TP (Micro Commercial Co): This substitute differs in reverse standoff voltage (58.1V) and clamping voltage (92V), representing a lower voltage protection tier. The 1.5KE68A-TP is suitable only when circuit protection requirements permit operation at these reduced voltage levels. Power dissipation matches the LCE70A at 1500W. The DO-201AE package is through-hole axial compatible. This part is RoHS3 compliant and in active production with operating temperature range -55°C to 175°C.

Frequently Asked Questions (FAQ)

Q: Can the 5KP70A directly replace the LCE70A? A: Yes. Both parts maintain 70V reverse standoff voltage and 113V clamping voltage. The 5KP70A's higher current and power ratings provide equal or superior protection. Package compatibility is maintained through axial through-hole configuration. Verify PCB layout accommodates the P600 package geometry.

Q: Is the 1.5KE68A-TP a direct replacement? A: No. The 1.5KE68A-TP operates at 58.1V reverse standoff and 92V clamping voltage, which is lower than the LCE70A's 70V and 113V specifications. This substitute is applicable only when circuit design permits reduced protection voltage thresholds.

Q: What determines whether a TVS diode can substitute for the LCE70A? A: Substitution eligibility is determined by matching reverse standoff voltage, clamping voltage, and ensuring peak pulse current and power dissipation meet or exceed application requirements. Package type must be mechanically compatible with PCB layout. Unidirectional channel configuration must remain constant.

Q: Are there temperature range differences between these parts? A: The LCE70A operates -65°C to 175°C. Both substitutes operate -55°C to 175°C. The LCE70A provides extended low-temperature operation to -65°C. For applications requiring operation below -55°C, the LCE70A is the appropriate selection.

Q: What is the significance of the different package types (DO-201AA, P600, DO-201AE)? A: All three packages are through-hole axial configurations suitable for PCB mounting. Package selection depends on available board space and thermal management requirements. The P600 package (5KP70A) accommodates higher power dissipation through increased surface area. Verify footprint compatibility before substitution.

Q: Are all three parts RoHS3 compliant? A: Yes. The LCE70A, 5KP70A, and 1.5KE68A-TP are all RoHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing.