1N6040 Equivalent & Substitute Parts

Part Overview

The 1N6040 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This bidirectional Zener diode operates in the DO-13 through-hole package and provides peak pulse power handling of 1500W with a clamping voltage of 16.2V at peak pulse current. The part is currently active in production with 910 units in stock.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining compatibility with the application circuit topology and mounting requirements.

Substiute Parts

1N6040

Microchip TechnologyIn Stock: 9251N6040 Datasheet

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1.5KE10CA

Taiwan Semiconductor CorporationIn Stock: 10761.5KE10CA Datasheet

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SA8.5CA

Taiwan Semiconductor CorporationIn Stock: 16110SA8.5CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1N6040 are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 8.5V nominal
• Voltage - Breakdown (Min): within acceptable range for the application
• Voltage - Clamping (Max) @ Ipp: comparable clamping performance
• Current - Peak Pulse (10/1000µs): minimum 93A capability
• Power - Peak Pulse: 1500W rating
• Operating Temperature Range: -55°C to 175°C (TJ)
• Bidirectional Channels: 1 channel configuration
• Type: Zener diode topology
• Mounting Type: Through Hole

Secondary Compatibility Factors:

• Package / Case: DO-13, DO-201, or DO-204AC (all through-hole axial packages)
• Product Status: Active production status
• RoHS and REACH compliance status

The 1.5KE10CA and SA8.5CA are identified as substitute parts based on matching reverse standoff voltage, breakdown characteristics, bidirectional operation, and through-hole mounting compatibility. Differences in clamping voltage, peak pulse current, and package form factor are noted for application-specific evaluation.

Parameter Comparison

Engineering Selection Recommendations

1N6040 (Microchip Technology)

The 1N6040 is the primary component specification. It is RoHS non-compliant and suitable for applications where legacy compliance status is acceptable. The DO-13 package provides a compact through-hole form factor. Peak pulse current capability of 93A and clamping voltage of 16.2V define the performance envelope for this device.

1.5KE10CA (Taiwan Semiconductor Corporation)

The 1.5KE10CA is a direct functional substitute with ROHS3 compliance. It provides equivalent 1500W peak pulse power handling and slightly higher peak pulse current (108A). The clamping voltage is lower at 14.5V compared to the 1N6040 at 16.2V. The DO-201 package is larger than DO-13 but maintains through-hole mounting compatibility. This substitute is suitable for applications requiring RoHS3 compliance and where the lower clamping voltage is acceptable.

SA8.5CA (Taiwan Semiconductor Corporation)

The SA8.5CA is a ROHS3-compliant substitute with identical reverse standoff voltage (8.5V) and comparable breakdown characteristics. However, this device is rated for 500W peak pulse power and 36A peak pulse current, representing reduced power handling capability compared to the 1N6040. The DO-204AC (DO-15) package is smaller than DO-13. This substitute is suitable for lower-power applications and where space constraints favor a smaller package footprint.

Compliance Considerations

The 1N6040 is RoHS non-compliant. Both substitute parts (1.5KE10CA and SA8.5CA) are ROHS3 compliant. Selection between the main part and substitutes should account for regulatory requirements in the target application and end-use market.

Frequently Asked Questions (FAQ)

Q: Can the 1.5KE10CA directly replace the 1N6040 in all applications?

A: The 1.5KE10CA is electrically compatible for general-purpose TVS applications with matching reverse standoff voltage and bidirectional operation. The lower clamping voltage (14.5V vs. 16.2V) and different package form factor (DO-201 vs. DO-13) require circuit board layout verification. Both devices maintain the same operating temperature range and 1500W peak pulse power rating.

Q: What are the limitations of the SA8.5CA as a substitute?

A: The SA8.5CA has reduced power handling capability (500W vs. 1500W) and lower peak pulse current (36A vs. 93A). It is suitable only for applications where the transient energy levels are within the 500W specification. The smaller DO-204AC package may offer space advantages but requires PCB layout modification from the original DO-13 design.

Q: Are there package compatibility issues between the substitute parts?

A: Yes. The 1N6040 uses DO-13 package, the 1.5KE10CA uses DO-201, and the SA8.5CA uses DO-204AC (DO-15). All are through-hole axial packages but have different physical dimensions. PCB footprint modification is required when switching between these packages.

Q: How do the clamping voltages differ between these parts?

A: The 1N6040 clamps at 16.2V maximum, the 1.5KE10CA at 14.5V, and the SA8.5CA at 14.4V. Lower clamping voltage provides tighter protection but may increase component stress in high-energy transient events. Application circuit requirements determine acceptable clamping voltage range.

Q: What is the significance of RoHS compliance differences?

A: The 1N6040 is RoHS non-compliant, while both substitute parts are ROHS3 compliant. RoHS3 compliance is required for products sold in the European Union and many other regulated markets. Selection depends on target market regulatory requirements and customer specifications.

Q: Can the 1.5KE10CA and SA8.5CA be used interchangeably?

A: No. The 1.5KE10CA and SA8.5CA have different power ratings (1500W vs. 500W) and peak pulse currents (108A vs. 36A). They are not interchangeable. The 1.5KE10CA is the higher-performance option and is suitable for applications requiring the full 1500W power handling of the original 1N6040.

Q: What parameters must remain constant for substitution?

A: Reverse standoff voltage, bidirectional operation, Zener diode type, through-hole mounting, and operating temperature range must remain constant. Peak pulse current and power handling may vary based on application requirements, but clamping voltage differences should be evaluated against circuit protection specifications.