S2015LTP Equivalent & Substitute Parts

Part Overview

The S2015LTP is a Silicon Controlled Rectifier (SCR) manufactured by Littelfuse Inc., rated for 200V off-state voltage and 15A RMS on-state current in a TO-220-3 Isolated Tab package. This component is classified as Obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar functionality.

The S2015LTP operates as a standard recovery thyristor suitable for AC switching and control applications within its voltage and current specifications. Substitution is required when original inventory is depleted or when design requirements permit higher voltage ratings while maintaining electrical compatibility.

Substiute Parts

S2015LTP

Littelfuse Inc.In Stock: 827S2015LTP Datasheet

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S4015LTP

Littelfuse Inc.In Stock: 3487S4015LTP Datasheet

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S6015LTP

Littelfuse Inc.In Stock: 4136S6015LTP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the S2015LTP is based on electrical parameter compatibility within the following criteria:

Gate Control Parameters: Gate trigger voltage (Vgt) and gate trigger current (Igt) must remain equal or lower to ensure reliable triggering with existing gate drive circuits. Both substitute parts maintain Vgt = 1.5V and Igt = 30mA, matching the original specification.

On-State Characteristics: On-state voltage drop (Vtm), average on-state current (It AV), and RMS on-state current (It RMS) must be equal or lower to prevent thermal stress and ensure circuit compatibility. Both substitutes maintain Vtm = 1.6V, It AV = 9.5A, and It RMS = 15A.

Hold Current: Hold current (Ih) must remain equal or lower. Both substitutes maintain Ih = 40mA.

Off-State Leakage: Off-state current must be equal or lower. Both substitutes maintain 10µA maximum.

Surge Current Rating: Non-repetitive surge current ratings must be equal or higher. Both substitutes maintain 188A (50Hz) and 225A (60Hz).

Voltage Rating: Off-state voltage may be equal or higher. The S4015LTP provides 400V and S6015LTP provides 600V, both exceeding the original 200V specification. Higher voltage ratings do not compromise circuit operation when the applied voltage remains within the original 200V design limit.

Package and Thermal: Both substitutes maintain TO-220-3 Isolated Tab packaging, identical mounting type, and identical operating temperature range (-40°C to 125°C).

Compliance: Both substitutes are ROHS3 Compliant with MSL 1 (Unlimited), matching the original part's environmental classification.

Parameter Comparison

Engineering Selection Recommendations

S4015LTP (400V Rating): This part is Active and suitable for direct substitution in applications where the circuit voltage does not exceed 200V. The 400V rating provides additional voltage margin without affecting gate drive requirements, on-state characteristics, or thermal performance. Selection is appropriate for standard replacement and new designs requiring enhanced voltage headroom.

S6015LTP (600V Rating): This part is Active and suitable for direct substitution in applications where the circuit voltage does not exceed 200V. The 600V rating provides maximum voltage margin and is appropriate for applications requiring the highest voltage safety factor or potential future design upgrades to higher voltage systems.

Both substitute parts maintain full electrical and thermal compatibility with the original S2015LTP specification. Selection between S4015LTP and S6015LTP depends on system voltage requirements and design margin preferences. Both are ROHS3 Compliant with identical MSL classification, ensuring equivalent environmental performance and long-term reliability.

Frequently Asked Questions (FAQ)

Q: Can S4015LTP or S6015LTP be used as direct replacements for S2015LTP in existing circuits?

A: Yes. Both substitute parts maintain identical gate trigger parameters (Vgt, Igt), on-state characteristics (Vtm, It RMS), hold current, off-state leakage, and surge current ratings. The higher voltage ratings (400V and 600V) do not affect circuit operation when applied voltage remains within the original 200V design specification. Mechanical compatibility is identical (TO-220-3 Isolated Tab package).

Q: What is the difference between S4015LTP and S6015LTP?

A: The primary difference is off-state voltage rating: S4015LTP is rated 400V and S6015LTP is rated 600V. All other electrical parameters, including gate control, on-state performance, thermal characteristics, and package specifications, are identical. Selection depends on required voltage margin and system design voltage.

Q: Are there any thermal or current handling differences between these parts?

A: No. All three parts (S2015LTP, S4015LTP, S6015LTP) maintain identical on-state current ratings (15A RMS), on-state voltage drop (1.6V maximum), and operating temperature range (-40°C to 125°C). Thermal performance and current handling capacity are equivalent.

Q: Do the substitute parts have the same gate drive requirements?

A: Yes. Gate trigger voltage (Vgt = 1.5V maximum) and gate trigger current (Igt = 30mA maximum) are identical across all three parts. Existing gate drive circuits require no modification.

Q: What is the product status difference, and does it affect selection?

A: S2015LTP is Obsolete, while S4015LTP and S6015LTP are Active. Active status indicates current manufacturing and availability. For new designs and ongoing production, Active parts are preferred to ensure long-term supply continuity.

Q: Are compliance and environmental ratings identical?

A: Yes. All three parts are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited). Environmental performance, storage requirements, and regulatory compliance are equivalent.