SMAJ150A-E3/5A Equivalent & Substitute Parts

Part Overview

The SMAJ150A-E3/5A is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 150V reverse standoff category with a 243V maximum clamping voltage and 1.2A peak pulse current rating. The device is designed for general-purpose transient protection applications and maintains active product status with full RoHS3 compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity while maintaining electrical and mechanical compatibility.

Substiute Parts

SMAJ150A-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 8128SMAJ150A-E3/5A Datasheet

Current PartRFQ

SMAJ150A

MDDIn Stock: 20427SMAJ150A Datasheet

MFR RecommendedRFQ

SMAJ150A

MDDIn Stock: 20427SMAJ150A Datasheet

MFR RecommendedRFQ

SMAJ150A-13-F

Diodes IncorporatedIn Stock: 18538SMAJ150A-13-F Datasheet

MFR RecommendedRFQ

SMAJ150A-TP

Micro Commercial CoIn Stock: 4482SMAJ150A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMAJ150A-E3/5A is determined by strict electrical and mechanical parameter matching:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 150V
• Voltage - Breakdown (Min): 167V
• Voltage - Clamping (Max) @ Ipp: 243V
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Current - Peak Pulse (10/1000µs): Substitute parts rated at 1.6A exceed the 1.2A requirement and remain compatible
• Power - Peak Pulse: Substitute parts rated at 400W exceed the 300W requirement and remain compatible
• Operating Temperature Range: Substitute parts with extended or equivalent temperature ranges remain compatible

All identified substitute parts maintain identical voltage specifications and package compatibility while offering equal or superior current and power ratings.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain active product status and full RoHS3 compliance. Selection among SMAJ150A-E3/5A, SMAJ150A (MDD), SMAJ150A-13-F (Diodes Incorporated), and SMAJ150A-TP (Micro Commercial Co) is based on availability, lead time, and procurement requirements.

The SMAJ150A-TP variant offers the widest operating temperature range (-55°C ~ 175°C TA) and is suitable for applications requiring extended thermal performance. The SMAJ150A-13-F (Diodes Incorporated) and SMAJ150A (MDD) maintain the standard temperature range with equivalent electrical specifications. All substitute parts provide equal or superior current and power handling compared to the original SMAJ150A-E3/5A specification.

Frequently Asked Questions (FAQ)

Q: Can SMAJ150A-TP replace SMAJ150A-E3/5A in all applications? A: Yes. The SMAJ150A-TP maintains identical voltage specifications (150V standoff, 167V breakdown, 243V clamping) and package compatibility (DO-214AC, SMA). The higher current rating (1.6A vs 1.2A) and extended temperature range (-55°C ~ 175°C) provide equal or superior performance.

Q: What is the difference between SMAJ150A (MDD) and SMAJ150A-13-F (Diodes Incorporated)? A: Both parts share identical electrical specifications and package format. The primary difference is manufacturer. SMAJ150A-13-F supports the full -55°C ~ 150°C temperature range, while SMAJ150A (MDD) operates at -50°C ~ 150°C. Both are RoHS3 compliant with MSL 1 rating.

Q: Are all substitute parts in the same package? A: Yes. All substitute parts use the DO-214AC (SMA) surface mount package with identical pinout and footprint compatibility.

Q: Do substitute parts require PCB layout changes? A: No. All substitute parts maintain the same DO-214AC (SMA) package dimensions and surface mount footprint. Existing PCB designs require no modification.

Q: Which substitute part offers the best thermal performance? A: The SMAJ150A-TP (Micro Commercial Co) supports operation to 175°C (TA), exceeding the standard 150°C (TJ) specification of other variants.

Q: Are all parts RoHS3 compliant? A: Yes. All listed parts, including the original SMAJ150A-E3/5A and all substitutes, maintain full RoHS3 compliance with MSL 1 (Unlimited) moisture sensitivity rating.