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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division SMAJ24-E3/61

Name: SMAJ24-E3/61
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMAJ24-E3/61
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMAJ24-E3/61

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: SMAJ24-E3/61.pdf

Description:: TVS DIODE 24VWM 43VC DO214AC

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Product details

Overview

SMAJ24-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on power and signal lines. It features a 24 V stand-off voltage (V_WM), 43.0 V maximum clamping voltage (V_C) at 9.3 A peak pulse current (I_PPM), and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial power supplies.

For engineers reviewing the SMAJ24-E3/61 datasheet, SMAJ24-E3/61 pinout, SMAJ24-E3/61 application, or SMAJ24-E3/61 equivalent, this device delivers verified transient suppression performance with RoHS-compliant matte tin-plated leads, MSL Level 1 moisture sensitivity, and JESD201 Class 1A whisker resistance - critical for automated SMT assembly and long-term reliability in harsh environments.

Technical Context

This unidirectional TVS diode operates by avalanche breakdown above its 26.7–32.6 V breakdown voltage (V_BR at 1 mA), maintaining low dynamic impedance to limit surge energy. Its 120 °C/W junction-to-ambient thermal resistance and 30 °C/W junction-to-lead resistance support stable operation up to 150 °C junction temperature under repetitive surges.

The device complies with ANSI/IEEE C62.35 for surge testing, exhibits ≤1 µA reverse leakage at 24 V, and achieves sub-nanosecond response time to clamp transients induced by inductive switching or ESD events - enabling protection of sensitive downstream circuitry without affecting normal signal integrity.

Key Specifications

Parameter	Value and Actual Design Meaning
Stand-off Voltage (V_WM)	24 V - Maximum continuous reverse operating voltage before conduction begins
Clamping Voltage (V_C)	43.0 V at 9.3 A - Peak voltage seen across protected line during 10/1000 µs surge
Peak Pulse Power (P_PPM)	400 W - Surge energy handling capability per single 10/1000 µs transient
Breakdown Voltage (V_BR)	26.7–32.6 V at 1 mA - Confirmed avalanche threshold range for reliable triggering
Reverse Leakage (I_D)	≤1 µA at 24 V - Negligible standby current that avoids loading of source circuits
Junction Temperature Range	–55 °C to +150 °C - Enables deployment in automotive under-hood and industrial motor drive environments

Pinout & Package

Package: DO-214AC (SMA), surface-mount, low-profile plastic case with cathode band marking; meets UL 94 V-0 flammability rating and J-STD-020 MSL Level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / surge return path	Connected to protected line's low-side or ground-referenced node
Cathode	Avalanche conduction terminal	Marked with band; connected to protected line's high-side or supply rail

Key Features

Feature	Design Value
Glass-passivated junction	Ensures stable V_BR tolerance and long-term reliability under thermal cycling
400 W peak pulse power (≤78 V)	Supports robust protection against IEC 61000-4-5 Level 3/4 surges without derating
Matte tin-plated leads	Guarantees solderability per J-STD-002 and eliminates whisker risk (JESD201 Class 1A)
Low incremental surge resistance	Minimizes V_C overshoot during fast-rising transients (<1 ns response)

Applications

Industrial Motor Drives	Automotive Body Control Modules
Use Scenario: Protection of gate drivers and microcontroller I/O lines against inductive kickback from relay coils and solenoids. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MCU GPIO and external load interface to clamp negative-going transients. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic inputs while maintaining signal fidelity during normal operation.	Use Scenario: Safeguarding LIN bus transceivers and sensor supply rails from battery dump and load-dump events. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply input to absorb 35 V/100 ms load-dump surges per ISO 7637-2. Use Value: Limits voltage excursion to 43.0 V during surge, keeping downstream regulators within safe input range.
Consumer Power Adapters	Telecom PoE Injectors
Use Scenario: Secondary-side overvoltage suppression on 5 V/12 V DC outputs of flyback converters. IC Role / Device Role / Timing Role: Clamping device placed across output capacitor to suppress ringing and cross-regulation spikes. Use Value: Reduces need for oversized output capacitors by limiting transient overshoot to <45 V.	Use Scenario: Data line protection on IEEE 802.3af/at Ethernet ports exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; SMAJ24-E3/61 used on DC bias rail feeding PoE PD controller. Use Value: Absorbs 400 W surge energy on 24 V auxiliary rail without degradation after repeated events.

Industrial Motor Drives

Automotive Body Control Modules

Use Scenario: Protection of gate drivers and microcontroller I/O lines against inductive kickback from relay coils and solenoids.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between MCU GPIO and external load interface to clamp negative-going transients.

Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic inputs while maintaining signal fidelity during normal operation.

Use Scenario: Safeguarding LIN bus transceivers and sensor supply rails from battery dump and load-dump events.

IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply input to absorb 35 V/100 ms load-dump surges per ISO 7637-2.

Use Value: Limits voltage excursion to 43.0 V during surge, keeping downstream regulators within safe input range.

Consumer Power Adapters

Telecom PoE Injectors

Use Scenario: Secondary-side overvoltage suppression on 5 V/12 V DC outputs of flyback converters.

IC Role / Device Role / Timing Role: Clamping device placed across output capacitor to suppress ringing and cross-regulation spikes.

Use Value: Reduces need for oversized output capacitors by limiting transient overshoot to <45 V.

Use Scenario: Data line protection on IEEE 802.3af/at Ethernet ports exposed to lightning-induced surges.

IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; SMAJ24-E3/61 used on DC bias rail feeding PoE PD controller.

Use Value: Absorbs 400 W surge energy on 24 V auxiliary rail without degradation after repeated events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ24A-E3/61	Lower V_BR range (26.7–29.5 V), tighter 5% V_WM tolerance vs. standard 10%	Better suited for precision 24 V systems where clamping margin must be minimized	Select SMAJ24A-E3/61 when tighter V_BR control is required; SMAJ24-E3/61 offers broader tolerance for cost-sensitive designs
SMCJ24A-E3/61	Higher P_PPM (1500 W), same V_WM/V_C, larger DO-214AB (SMC) package	Required for higher-energy surges (e.g., IEC 61000-4-5 Level 4) where 400 W is insufficient	Choose SMCJ24A-E3/61 only if PCB layout allows larger footprint and surge requirements exceed 400 W

Compared with SMAJ24A-E3/61 and SMCJ24A-E3/61, the SMAJ24-E3/61 provides optimal balance of compact DO-214AC packaging, 400 W surge capacity, and commercial-grade cost structure - making it ideal for space-constrained 24 V industrial and automotive subsystems where full AEC-Q101 qualification is not mandated.

Availability

SMAJ24-E3/61 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, and consumer power adapters requiring stable component supply with full traceability and no obsolescence risk.

Supply support for SMAJ24-E3/61 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and manufacturability.

The SMAJ series was developed specifically for surface-mount transient suppression in high-volume industrial and automotive applications, prioritizing automated assembly compatibility, thermal robustness, and consistent clamping performance across temperature.

FAQ

What is the maximum clamping voltage of SMAJ24-E3/61 under a 10/1000 µs surge?

The SMAJ24-E3/61 has a maximum clamping voltage (V_C) of 43.0 V at 9.3 A peak pulse current (I_PPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the highest voltage the device allows across protected circuitry during standardized surge testing - ensuring downstream components remain within safe operating limits.

Is SMAJ24-E3/61 unidirectional or bidirectional?

SMAJ24-E3/61 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix. It conducts only in reverse bias above its breakdown voltage and must be installed with the cathode band oriented toward the positive side of the protected line. Bidirectional variants like SMAJ24CA exist but are distinct part numbers with different marking and electrical symmetry.

Does SMAJ24-E3/61 meet automotive qualification standards?

No, SMAJ24-E3/61 is a commercial-grade part (E3 suffix). For automotive applications requiring AEC-Q101 qualification, the equivalent high-reliability variant is SMAJ24HE3/61. The SMAJ24-E3/61 does not undergo the extended stress testing required for automotive use, though its -55 °C to +150 °C operating range supports many under-hood environments.

What is the reverse leakage current specification for SMAJ24-E3/61 at rated V_WM?

At its 24 V stand-off voltage (V_WM) and 25 °C ambient temperature, the SMAJ24-E3/61 exhibits a maximum reverse leakage current (I_D) of 1 µA. This low leakage ensures minimal power loss and avoids unintended loading of voltage-sensitive circuits such as precision reference rails or high-impedance sensor interfaces.

Can SMAJ24-E3/61 be used in place of SMAJ24A-E3/61?

SMAJ24-E3/61 and SMAJ24A-E3/61 are not interchangeable without design review: the "A" variant has tighter 5% V_BR tolerance (26.7–29.5 V) versus 10% for SMAJ24-E3/61 (26.7–32.6 V), resulting in higher clamping uncertainty. Substituting SMAJ24-E3/61 may increase V_C margin and reduce protection effectiveness in precision 24 V systems.

SMAJ24-E3/61 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: DO-214AC, SMA

Series:: TransZorb®

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 24V

Voltage - Breakdown (Min):: 26.7V

Voltage - Clamping (Max) @ Ipp:: 43V

Current - Peak Pulse (10/1000µs):: 9.3A

Power - Peak Pulse:: 400W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

SMAJ24-E3/61 FAQ

1.How can I place an order for SMAJ24-E3/61 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMAJ24-E3/61 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SMAJ24-E3/61 reliable?

The price and inventory of SMAJ24-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ24-E3/61 is usually 5 days.

3.What payment methods are accepted for SMAJ24-E3/61?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ24-E3/61 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMAJ24-E3/61?

SMAJ24-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMAJ24-E3/61 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SMAJ24-E3/61?

For technical support, including SMAJ24-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ24-E3/61 requirements.

6.How does Aetrix verify that SMAJ24-E3/61 is sourced from the original manufacturer or authorized distributors?

All SMAJ24-E3/61 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMAJ24-E3/61 meets industry standards.

7.What is the process for return or replacement of SMAJ24-E3/61?

All SMAJ24-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ24-E3/61, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SMAJ24-E3/61 part is unused and in its original packaging.

Return procedure for SMAJ24-E3/61:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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