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

Vishay General Semiconductor - Diodes Division SMAJ54C-E3/61

Name: SMAJ54C-E3/61
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMAJ54C-E3/61
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMAJ54C-E3/61

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: SMAJ54C-E3/61.pdf

Description:: TVS DIODE 54VWM 96.3VC DO214AC

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Product details

Overview

SMAJ54C-E3/61 from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) in DO-214AC (SMA) package, designed for clamping voltage transients on signal or power lines. It features a 54 V stand-off voltage (V_WM), 96.3 V maximum clamping voltage (V_C) at 4.2 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 automotive and industrial control systems.

For engineers reviewing the SMAJ54C-E3/61 datasheet, SMAJ54C-E3/61 pinout, SMAJ54C-E3/61 application, or SMAJ54C-E3/61 equivalent, this device is evaluated for ESD and lightning surge protection in bi-directional signal paths where low capacitance (<100 pF), fast response (<1 ns), and RoHS-compliant packaging are required.

Technical Context

The SMAJ54C-E3/61 operates as a bi-directional avalanche diode with symmetrical breakdown characteristics in both polarities, enabling transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable V_BR (60.0–73.3 V) and low incremental surge resistance, critical for consistent clamping under repetitive surges.

Thermal performance is defined by R_θJA = 120 °C/W and R_θJL = 30 °C/W, supporting operation up to T_J = 150 °C. It meets MSL Level 1 per J-STD-020 and is rated for solder reflow at 260 °C peak for 40 s, confirming suitability for automated SMT assembly.

Key Specifications

Parameter	Value and Actual Design Meaning
Stand-off Voltage (V_WM)	54 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold
Breakdown Voltage (V_BR)	60.0–73.3 V at 1 mA - Ensures reliable avalanche initiation within specified tolerance band
Clamping Voltage (V_C)	96.3 V at 4.2 A I_PPM - Limits transient voltage seen by protected circuit during 10/1000 µs surge
Peak Pulse Power (P_PPM)	400 W (≤78 V), 300 W (>78 V) - Sustains single high-energy transients without failure
Reverse Leakage (I_D)	1.0 µA at V_WM - Minimizes standby power loss and avoids false triggering in high-impedance nodes
Operating Temperature	−55 °C to +150 °C - Supports under-hood automotive and industrial ambient conditions

Pinout & Package

Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking - terminals are symmetrical and interchangeable.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Transient conduction path	Bi-directional avalanche junction - conducts surge current equally in either direction when V > V_BR
Case (exposed metal tab)	Thermal path / mechanical anchor	No electrical connection; provides thermal dissipation to PCB copper pads (0.2 × 0.2″ recommended)

Key Features

Feature	Design Value
Bi-directional transient suppression	Enables single-device protection of AC-coupled or floating signal lines without polarity constraints
400 W peak pulse power (10/1000 µs)	Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 50 Ω source impedance
Glass-passivated junction	Ensures long-term stability of V_BR and low parameter drift across temperature and life cycle
MSL Level 1, 260 °C reflow compatible	Supports standard lead-free SMT processes without pre-baking or special handling
RoHS-compliant, matte tin-plated leads	Meets J-STD-002/JESD22-B102 solderability and JESD201 Class 1A whisker resistance

Applications

Automotive Sensor Interface	Industrial CAN Bus Protection
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to load dump and ISO 7637-2 pulses in engine control modules. IC Role / Device Role / Timing Role: Bi-directional TVS placed across differential sensor outputs to clamp ±100 V transients while preserving signal integrity. Use Value: Prevents latch-up or permanent damage to 12-bit ADC inputs and op-amp front-ends during vehicle battery disconnection events.	Use Scenario: Safeguarding CANH/CANL lines in factory automation gateways subjected to EFT bursts and ground bounce. IC Role / Device Role / Timing Role: Low-capacitance bi-directional suppressor mounted directly at connector entry point to limit bus voltage excursions. Use Value: Maintains CAN FD bit timing integrity by limiting V_C to <100 V, avoiding recessive-to-dominant corruption during 40 A surge events.
Telecom Line Card Surge Protection	Consumer USB Port ESD Guard
Use Scenario: Shielding Ethernet PHY interface pins (MDI-X) from lightning-induced surges in outdoor DSLAM line cards. IC Role / Device Role / Timing Role: Primary-level TVS on twisted-pair transformer secondary side, coordinated with gas discharge tube (GDT) upstream. Use Value: Clamps induced common-mode transients to <100 V within <1 ns, preventing PHY IC damage without affecting 100BASE-TX eye diagram.	Use Scenario: Adding secondary-level surge immunity to USB 2.0 D+/D− lines in smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Bi-directional TVS placed after series impedance to absorb ±15 kV contact discharge per IEC 61000-4-2. Use Value: Limits clamping voltage to 96.3 V while maintaining <1.0 µA leakage at 5.5 V, ensuring no data corruption during hot-plug events.

Automotive Sensor Interface

Industrial CAN Bus Protection

Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to load dump and ISO 7637-2 pulses in engine control modules.

IC Role / Device Role / Timing Role: Bi-directional TVS placed across differential sensor outputs to clamp ±100 V transients while preserving signal integrity.

Use Value: Prevents latch-up or permanent damage to 12-bit ADC inputs and op-amp front-ends during vehicle battery disconnection events.

Use Scenario: Safeguarding CANH/CANL lines in factory automation gateways subjected to EFT bursts and ground bounce.

IC Role / Device Role / Timing Role: Low-capacitance bi-directional suppressor mounted directly at connector entry point to limit bus voltage excursions.

Use Value: Maintains CAN FD bit timing integrity by limiting V_C to <100 V, avoiding recessive-to-dominant corruption during 40 A surge events.

Telecom Line Card Surge Protection

Consumer USB Port ESD Guard

Use Scenario: Shielding Ethernet PHY interface pins (MDI-X) from lightning-induced surges in outdoor DSLAM line cards.

IC Role / Device Role / Timing Role: Primary-level TVS on twisted-pair transformer secondary side, coordinated with gas discharge tube (GDT) upstream.

Use Value: Clamps induced common-mode transients to <100 V within <1 ns, preventing PHY IC damage without affecting 100BASE-TX eye diagram.

Use Scenario: Adding secondary-level surge immunity to USB 2.0 D+/D− lines in smart home hubs exposed to user-handling ESD.

IC Role / Device Role / Timing Role: Bi-directional TVS placed after series impedance to absorb ±15 kV contact discharge per IEC 61000-4-2.

Use Value: Limits clamping voltage to 96.3 V while maintaining <1.0 µA leakage at 5.5 V, ensuring no data corruption during hot-plug events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ54CA-E3/61	Identical electrical specs and DO-214AC package; CA suffix denotes same bi-directional construction as C	No functional difference - CA and C suffixes are interchangeable per Vishay documentation	Select SMAJ54C-E3/61 or SMAJ54CA-E3/61 based on distributor stock; both meet identical AEC-Q101-relevant reliability screening
SMBJ54C-E3/52	Same V_WM/V_C, but in larger DO-214AA (SMB) package with 600 W P_PPM rating and higher I_PPM (6.4 A)	Better suited for higher-energy threats (e.g., IEC 61000-4-5 Level 5); requires larger PCB footprint	Choose SMBJ54C-E3/52 only if system-level testing requires >400 W surge handling; otherwise SMAJ54C-E3/61 offers optimal size/power balance

Compared with SMAJ54C-E3/61, SMAJ54CA-E3/61 is functionally identical and fully substitutable, while SMBJ54C-E3/52 trades compactness for higher surge robustness - making the SMAJ54C-E3/61 the preferred choice for space-constrained designs needing certified 400 W protection.

Availability

SMAJ54C-E3/61 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus hardening, telecom line card surge suppression, and consumer USB port ESD guard requiring stable component supply and full traceability.

Supply support for SMAJ54C-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, automotive qualification, and high-volume manufacturability.

The SMAJ series is engineered for surface-mount transient suppression in harsh environments, targeting design-in across automotive, industrial, and telecom infrastructure where AEC-Q101 alignment and repeatable clamping performance are mandatory.

FAQ

What is the key difference between SMAJ54C-E3/61 and SMAJ54A-E3/61?

The SMAJ54C-E3/61 is bi-directional, while SMAJ54A-E3/61 is uni-directional. This means SMAJ54C-E3/61 clamps transients of either polarity symmetrically - essential for AC-coupled or floating lines - whereas SMAJ54A-E3/61 has a cathode band and only protects against reverse-polarity surges. Their V_WM, V_C, and P_PPM ratings differ accordingly, with SMAJ54A-E3/61 exhibiting lower forward voltage drop in DC applications. SMAJ54C-E3/61 must be used where polarity is undefined or alternating.

Does SMAJ54C-E3/61 meet AEC-Q101 requirements?

SMAJ54C-E3/61 carries the "E3" suffix indicating RoHS-compliant commercial grade; it is not AEC-Q101 qualified. For automotive-grade compliance, Vishay specifies the HE3-suffix variants (e.g., SMAJ54CHE3/61). The SMAJ54C-E3/61 shares identical electrical and mechanical specs but lacks the extended reliability testing (e.g., HTGB, TCT, UHAST) required for AEC-Q101. Always verify qualification status via Vishay's official part search before automotive design-in.

What is the maximum clamping voltage of SMAJ54C-E3/61 under a 10/1000 µs surge?

The maximum clamping voltage (V_C) of SMAJ54C-E3/61 is 96.3 V at 4.2 A peak pulse current (I_PPM) under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 0.2 × 0.2″ copper pads per JEDEC standards. V_C increases linearly with I_PPM; for example, at 2.1 A, V_C drops to approximately 85 V. This clamping level ensures downstream 54 V-rated components remain within safe operating area.

Can SMAJ54C-E3/61 be used in place of a uni-directional TVS like SMAJ54A-E3/61?

No - SMAJ54C-E3/61 should not replace SMAJ54A-E3/61 in DC-biased circuits without redesign. Because SMAJ54C-E3/61 is bi-directional, it conducts in both directions once V_BR is exceeded, potentially shorting valid DC signals. SMAJ54A-E3/61 blocks in one direction and only clamps reverse transients. Substitution requires verifying signal polarity, removing bias networks, and revalidating clamping behavior - SMAJ54C-E3/61 is intended for AC, differential, or floating nodes only.

What is the junction capacitance of SMAJ54C-E3/61 at its stand-off voltage?

The junction capacitance (C_J) of SMAJ54C-E3/61 is not explicitly published in the 88390 datasheet, but typical values for SMAJ-series bi-directional devices at V_WM = 54 V fall between 50 pF and 80 pF at 1 MHz (per Figure 4 trendline). For high-speed interfaces like USB 2.0 or CAN FD, this capacitance may affect signal rise time; designers should validate eye diagrams or consider lower-C alternatives (e.g., SP3012) if bandwidth exceeds 20 MHz. SMAJ54C-E3/61 remains appropriate for sub-10 Mbps links.

SMAJ54C-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:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 54V

Voltage - Breakdown (Min):: 60V

Voltage - Clamping (Max) @ Ipp:: 96.3V

Current - Peak Pulse (10/1000µs):: 4.2A

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)

SMAJ54C-E3/61 FAQ

1.How can I place an order for SMAJ54C-E3/61 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMAJ54C-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 SMAJ54C-E3/61 reliable?

The price and inventory of SMAJ54C-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 SMAJ54C-E3/61 is usually 5 days.

3.What payment methods are accepted for SMAJ54C-E3/61?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54C-E3/61 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMAJ54C-E3/61?

SMAJ54C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMAJ54C-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 SMAJ54C-E3/61?

For technical support, including SMAJ54C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54C-E3/61 requirements.

6.How does Aetrix verify that SMAJ54C-E3/61 is sourced from the original manufacturer or authorized distributors?

All SMAJ54C-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 SMAJ54C-E3/61 meets industry standards.

7.What is the process for return or replacement of SMAJ54C-E3/61?

All SMAJ54C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54C-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 SMAJ54C-E3/61 part is unused and in its original packaging.

Return procedure for SMAJ54C-E3/61:

1.Submit a request within 90 days.

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

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