1N6361 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 1N6361 is an active Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose transient protection applications. This unidirectional Zener-type TVS diode features a 18V reverse standoff voltage with a 25.2V maximum clamping voltage at peak pulse current. The component is housed in a DO-13 through-hole package and is rated for 50A peak pulse current with 1500W peak pulse power dissipation.

The 1N6361 is classified as an active product with unlimited moisture sensitivity level (MSL 1) and operates across a temperature range of -65°C to 175°C. Finding equivalent or substitute parts may be necessary due to inventory constraints, packaging preferences, or application-specific requirements while maintaining electrical performance within acceptable parameters.

Substiute Parts

1N6361

Microchip TechnologyIn Stock: 12081N6361 Datasheet

Current PartRFQ

LCE15A

Littelfuse Inc.In Stock: 2372LCE15A Datasheet

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LCE18A

Littelfuse Inc.In Stock: 1007LCE18A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N6361 TVS diode is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Reverse standoff voltage (Typ): 18V nominal
• Clamping voltage (Max) @ Ipp: Must not exceed 25.2V to ensure circuit protection integrity
• Peak pulse current rating (10/1000µs): Minimum 50A to handle transient events
• Peak pulse power dissipation: 1500W (1.5kW)
• Unidirectional configuration with single channel

Mechanical Compatibility Criteria:

• Through-hole mounting requirement
• Package form factor: DO-13, DO-201, or equivalent axial packages
• Operating temperature range: Must support -65°C to 175°C or equivalent industrial range

Compliance Considerations:

• RoHS status and REACH compliance affect long-term supply chain viability
• Moisture sensitivity level (MSL 1) indicates unlimited shelf life

The substitute parts listed below (LCE15A and LCE18A from Littelfuse Inc.) meet the electrical performance requirements within the specified parameter tolerances and are available in compatible through-hole packages.

Parameter Comparison

Engineering Selection Recommendations

1N6361 (Microchip Technology) - Primary Part

The 1N6361 remains the primary selection when the original specification is required. This part is active and in stock (1113 pcs available). However, the RoHS non-compliant status may present supply chain constraints for applications requiring RoHS3 compliance.

LCE18A (Littelfuse Inc.) - Preferred Substitute

The LCE18A is the closest electrical equivalent to the 1N6361. Both devices share an 18V reverse standoff voltage, matching the primary protection threshold. The LCE18A exhibits a 29.2V maximum clamping voltage (compared to 25.2V for the 1N6361) and a 51A peak pulse current rating (compared to 50A). Both maintain 1500W peak pulse power dissipation and support the full -55°C to 175°C operating range (note: the 1N6361 extends to -65°C minimum).

The LCE18A is ROHS3 compliant, addressing regulatory requirements for new designs. The part is available in DO-201 axial package configuration, which is mechanically compatible with through-hole circuit board layouts. Inventory availability is 953 pcs.

LCE15A (Littelfuse Inc.) - Alternative Substitute

The LCE15A operates at a lower 15V reverse standoff voltage compared to the 1N6361's 18V rating. This device is suitable only for applications where the lower protection threshold is acceptable. The LCE15A provides superior peak pulse current handling (61A versus 50A) and maintains the same 1500W power dissipation. The clamping voltage of 24.4V is lower than the 1N6361, providing tighter voltage regulation. This part is ROHS3 compliant and available in DO-201 package with 2343 pcs in stock.

Compliance and Supply Chain Considerations

Both Littelfuse substitutes (LCE15A and LCE18A) are ROHS3 compliant and REACH unaffected, making them suitable for applications requiring environmental compliance. The 1N6361 is RoHS non-compliant, which may limit its use in regulated markets or new product designs. All three parts share the same ECCN (EAR99) and HTSUS classification (8541.10.0080), indicating equivalent export and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Can the LCE18A directly replace the 1N6361 in my circuit?

A: The LCE18A is electrically compatible with the 1N6361 for most general-purpose transient protection applications. Both devices share the same 18V reverse standoff voltage and 1500W peak pulse power rating. The LCE18A's 29.2V clamping voltage is 4V higher than the 1N6361's 25.2V specification. Verify that your circuit design tolerates this higher clamping voltage before substitution. The LCE18A is available in DO-201 axial package, which requires through-hole board layout compatibility.

Q: What is the difference between the LCE15A and LCE18A?

A: The primary difference is the reverse standoff voltage: LCE15A operates at 15V while LCE18A operates at 18V. The LCE15A is suitable only for circuits requiring lower voltage protection thresholds. The LCE15A provides higher peak pulse current (61A versus 51A) and lower clamping voltage (24.4V versus 29.2V). Select based on your circuit's required protection voltage level.

Q: Why does the 1N6361 have a lower minimum operating temperature (-65°C) compared to the Littelfuse substitutes (-55°C)?

A: The 1N6361 is specified for operation down to -65°C, while both LCE15A and LCE18A are specified to -55°C minimum. If your application requires operation below -55°C, the 1N6361 is the only suitable option among these three parts. For applications operating within the -55°C to 175°C range, all three parts are compatible.

Q: Are the Littelfuse LCE series parts RoHS compliant?

A: Yes, both LCE15A and LCE18A are ROHS3 compliant. The 1N6361 is RoHS non-compliant. If your design or supply chain requires RoHS compliance, select either LCE15A or LCE18A.

Q: What package differences exist between these parts?

A: The 1N6361 is supplied in DO-13 package. The LCE15A and LCE18A are supplied in DO-201 (also designated DO-201AA or DO-27) axial package. Both are through-hole components suitable for conventional PCB assembly. Verify your circuit board layout accommodates the axial lead spacing of the DO-201 package before substitution.

Q: Can I use the LCE15A if my circuit is designed for 18V protection?

A: No. The LCE15A's 15V reverse standoff voltage is lower than the 1N6361's 18V specification. Using the LCE15A in a circuit designed for 18V protection will cause the device to activate at a lower voltage threshold, potentially triggering false protection events. Use the LCE18A for equivalent 18V protection.

Q: What is the peak pulse current difference, and does it matter?

A: The 1N6361 is rated for 50A peak pulse current, while LCE18A is rated for 51A and LCE15A for 61A. All three devices maintain 1500W peak pulse power dissipation. The higher current ratings of the Littelfuse parts provide additional margin for transient events. For applications requiring exactly 50A handling, all three parts are suitable.

Q: Are there any moisture sensitivity concerns with these parts?

A: All three parts (1N6361, LCE15A, and LCE18A) are classified as MSL 1 (Unlimited), indicating unlimited shelf life and no moisture sensitivity concerns. Standard storage conditions apply.