P4SMA39A Equivalent & Substitute Parts

Part Overview

The P4SMA39A is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This unidirectional Zener diode operates in the DO-214AC (SMA) surface mount package and provides peak pulse protection at 7.6A with a maximum clamping voltage of 53.9V. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1). Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

P4SMA39A

Littelfuse Inc.In Stock: 2450P4SMA39A Datasheet

Current PartRFQ

SMAJP4KE39A-TP

Micro Commercial CoIn Stock: 5116SMAJP4KE39A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA39A is determined by electrical and mechanical parameter equivalence. The primary substitute, SMAJP4KE39A-TP, meets all critical substitution criteria:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 33.3V
• Voltage - Breakdown (Min): 37.1V
• Voltage - Clamping (Max) @ Ipp: 53.9V
• Current - Peak Pulse (10/1000µs): 7.6A
• Power - Peak Pulse: 400W

Mechanical Parameters (Must Match):

• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Unidirectional Channels: 1

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected
• Moisture Sensitivity Level: 1 (Unlimited)

The SMAJP4KE39A-TP is manufactured by Micro Commercial Co and maintains identical electrical performance and package compatibility with the P4SMA39A, enabling direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the P4SMA39A and SMAJP4KE39A-TP are active products with identical electrical specifications and compliance certifications. Selection between these parts is based on packaging availability and operating temperature requirements.

The P4SMA39A operates across -65°C to 150°C and is available in Cut Tape and Digi-Reel packaging formats. The SMAJP4KE39A-TP operates across -55°C to 175°C and is supplied in Tape & Reel format. Applications requiring operation below -55°C must use the P4SMA39A. Applications requiring operation above 150°C must use the SMAJP4KE39A-TP. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, supporting standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can SMAJP4KE39A-TP replace P4SMA39A in all applications?

A: SMAJP4KE39A-TP provides electrical and mechanical equivalence for applications operating between -55°C and 150°C. Applications requiring operation below -55°C require the P4SMA39A due to its extended lower temperature rating of -65°C.

Q: What is the difference between DO-214AC (SMA) and DO-214AC (SMAJ) package designations?

A: Both designations refer to the DO-214AC surface mount package with identical physical dimensions and pin configurations. The suffix (SMA vs. SMAJ) indicates the supplier device package designation and does not affect electrical performance or PCB footprint compatibility.

Q: Are both parts suitable for high-temperature applications?

A: The SMAJP4KE39A-TP supports operation up to 175°C (TJ), making it suitable for high-temperature environments. The P4SMA39A is rated to 150°C (TJ). Selection depends on specific application temperature requirements.

Q: Do packaging format differences affect circuit performance?

A: No. Cut Tape (CT), Digi-Reel, and Tape & Reel (TR) formats are supply and handling options only. They do not affect electrical characteristics, performance, or reliability of the TVS diode in circuit operation.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both P4SMA39A and SMAJP4KE39A-TP are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for industrial and commercial applications.