P1200SA Equivalent & Substitute Parts

Part Overview

The P1200SA is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc., designed for transient overvoltage protection in surface-mount applications. This component features a 100V off-state voltage rating with 150A peak pulse current capability in a DO-214AA (SMB) package. The P1200SA is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

P1200SA

Littelfuse Inc.In Stock: 30137P1200SA Datasheet

Current PartRFQ

P1200SALRP

Littelfuse Inc.In Stock: 7925P1200SALRP Datasheet

DirectRFQ

SMTPA100

STMicroelectronicsIn Stock: 2380SMTPA100 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P1200SA is determined by strict equivalence across the following critical parameters:

• Voltage - Off State: 100V
• Voltage - Breakover: 130V ±3V tolerance
• Current - Peak Pulse (8/20µs): 150A
• Package / Case: DO-214AA, SMB
• Number of Elements: 1
• Mounting Type: Surface Mount

Two substitute parts meet these criteria:

P1200SALRP (Littelfuse Inc.) - Direct manufacturer equivalent with identical electrical specifications and packaging. Differs only in product status (Active vs. Obsolete) and packaging format (Cut Tape).

SMTPA100 (STMicroelectronics) - Manufacturer-recommended substitute with equivalent voltage and current ratings. Minor variations exist in breakover voltage (133V vs. 130V), hold current (150mA vs. 120mA), and capacitance (35pF vs. 45pF), which remain within acceptable operating parameters for TVS thyristor applications.

Parameter Comparison

Engineering Selection Recommendations

P1200SALRP is the primary substitute for P1200SA applications. As a direct Littelfuse equivalent with identical electrical specifications and active product status, it provides seamless compatibility. The component is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Packaging is available in Cut Tape format.

SMTPA100 serves as an alternative substitute from STMicroelectronics. While electrical parameters remain functionally equivalent, minor deviations exist: breakover voltage is 133V (versus 130V), hold current is 150mA (versus 120mA), and capacitance is 35pF (versus 45pF). This component is also ROHS3 compliant and REACH unaffected. Selection of SMTPA100 is appropriate when STMicroelectronics supply chain or pricing considerations are relevant.

Both substitutes maintain the DO-214AA (SMB) package format and surface-mount configuration, ensuring mechanical and thermal compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can P1200SALRP be used as a direct replacement for P1200SA?

A: Yes. P1200SALRP is a direct Littelfuse equivalent with identical voltage ratings (100V off-state, 130V breakover), current ratings (150A peak pulse at 8/20µs), and package configuration (DO-214AA, SMB). The primary difference is product status: P1200SA is obsolete while P1200SALRP is active.

Q: What are the key differences between P1200SALRP and SMTPA100?

A: Both parts share the same off-state voltage (100V) and peak pulse current (150A at 8/20µs). SMTPA100 has a slightly higher breakover voltage (133V vs. 130V), higher hold current (150mA vs. 120mA), and lower capacitance (35pF vs. 45pF). These variations remain within acceptable operating ranges for TVS thyristor applications.

Q: Are both substitutes available in the same package?

A: Yes. Both P1200SALRP and SMTPA100 use the DO-214AA (SMB) surface-mount package, ensuring identical PCB footprint and thermal characteristics.

Q: Do the substitute parts meet current regulatory compliance?

A: Both P1200SALRP and SMTPA100 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original P1200SA is RoHS non-compliant.

Q: Which substitute should be selected for new designs?

A: For new designs, either P1200SALRP or SMTPA100 is acceptable based on supply chain availability and design requirements. Both are active products with current regulatory compliance. Selection between manufacturers depends on procurement strategy and performance margin requirements for the specific application.