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

Vishay General Semiconductor - Diodes Division SMA5J30-E3/5A

Name: SMA5J30-E3/5A
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMA5J30-E3/5A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMA5J30-E3/5A

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: SMA5J30-E3/5A.pdf

Description:: TVS DIODE 30VWM 53.5VC DO214AC

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Product details

Overview

SMA5J30-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 30 V standoff voltage (V_WM), 33.3–36.8 V breakdown range (V_BR), 48.4 V clamping voltage at 10.3 A peak pulse current (I_PPM), and 500 W peak pulse power (10/1000 µs waveform). It is widely deployed in automotive power supply inputs and industrial sensor interfaces.

For engineers reviewing the SMA5J30-E3/5A datasheet, SMA5J30-E3/5A pinout, SMA5J30-E3/5A application, or SMA5J30-E3/5A equivalent, key selection criteria include unidirectional polarity, 150 °C max junction temperature, RoHS-compliant matte tin plating, MSL Level 1 rating, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This TVS diode operates as a clamping device that remains non-conductive below V_WM = 30 V and rapidly avalanches above V_BR (min 33.3 V) to limit transient overvoltages. Its low incremental surge resistance and fast response time ensure effective suppression of ESD, lightning-induced surges, and inductive switching spikes.

The device uses a glass-passivated silicon junction and is rated for 40 A non-repetitive forward surge current (I_FSM, 8.3 ms half-sine), with thermal resistance R_θJA = 80 °C/W and R_θJL = 25 °C/W - enabling robust thermal performance on standard 5.0 mm × 5.0 mm copper pads.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	30 V - maximum continuous reverse operating voltage before clamping begins
V_BR (min/max)	33.3 V / 36.8 V at 1 mA - precise avalanche onset range defining turn-on threshold
V_C @ I_PPM	48.4 V at 10.3 A - clamped voltage during 500 W transient, limiting downstream stress
P_PPM	500 W (10/1000 µs) - peak surge energy handling capacity under standardized waveform
I_FSM	40 A (8.3 ms half-sine) - withstand capability against repetitive power rail surges
T_J max	150 °C - maximum junction temperature supporting operation in under-hood automotive environments
MSL Level	Level 1 (J-STD-020) - no floor life limitation; safe for standard SMT reflow up to 260 °C peak

Pinout & Package

Package: DO-214AC (SMA), surface-mount, low-profile plastic case with cathode band marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); weight: 0.064 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential side (e.g., GND) in unidirectional configuration
Cathode (banded end)	Reverse-biased blocking terminal	Connected to protected line (e.g., +30 V rail); avalanche conduction occurs when voltage exceeds V_BR

Key Features

Feature	Design Value
Glass-passivated junction	Ensures stable V_BR tolerance and long-term reliability under thermal cycling and humidity
AEC-Q101 qualification	Validated for automotive applications including engine control units and body electronics
Low incremental surge resistance	Minimizes V_C overshoot during fast transients, improving clamping precision
Matte tin-plated leads	Complies with J-STD-002 and JESD 22-B102 for solderability and whisker resistance (JESD 201 Class 1A)
UL 94 V-0 molding compound	Self-extinguishing encapsulation meets flammability safety requirements for enclosed systems

Applications

Automotive Power Input Protection	Industrial Sensor Signal Line Protection
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power rail and ground, absorbing >500 W surges without failure. Use Value: Prevents damage to downstream PMICs and microcontrollers by limiting transient voltage to ≤48.4 V at 10.3 A.	Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) from ESD and field-induced noise in factory automation. IC Role / Device Role / Timing Role: Standoff protection element connected in parallel with sensor output, conducting only during overvoltage events. Use Value: Maintains signal integrity with <1 µA leakage at 30 V, while clamping fast ESD pulses within nanoseconds.
Consumer Power Adapter Interface	Telecom DC Power Distribution
Use Scenario: Safeguarding USB-C PD and AC/DC adapter outputs against miswiring and surge coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, positioned upstream of DC-DC converters. Use Value: Enables compliance with IEC 61000-4-5 Level 3 (1 kV/2 Ω) with minimal board space due to SMA footprint.	Use Scenario: Protecting -48 V telecom power feeds from lightning-induced longitudinal surges on outdoor plant equipment. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional part protects grounded return paths in isolated systems. Use Value: Delivers 500 W surge rating with 80 °C/W thermal resistance, allowing reliable operation in sealed, convection-limited enclosures.

Automotive Power Input Protection

Industrial Sensor Signal Line Protection

Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator ripple transients.

IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power rail and ground, absorbing >500 W surges without failure.

Use Value: Prevents damage to downstream PMICs and microcontrollers by limiting transient voltage to ≤48.4 V at 10.3 A.

Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) from ESD and field-induced noise in factory automation.

IC Role / Device Role / Timing Role: Standoff protection element connected in parallel with sensor output, conducting only during overvoltage events.

Use Value: Maintains signal integrity with <1 µA leakage at 30 V, while clamping fast ESD pulses within nanoseconds.

Consumer Power Adapter Interface

Telecom DC Power Distribution

Use Scenario: Safeguarding USB-C PD and AC/DC adapter outputs against miswiring and surge coupling.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, positioned upstream of DC-DC converters.

Use Value: Enables compliance with IEC 61000-4-5 Level 3 (1 kV/2 Ω) with minimal board space due to SMA footprint.

Use Scenario: Protecting -48 V telecom power feeds from lightning-induced longitudinal surges on outdoor plant equipment.

IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional part protects grounded return paths in isolated systems.

Use Value: Delivers 500 W surge rating with 80 °C/W thermal resistance, allowing reliable operation in sealed, convection-limited enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMA5J30AHE3/5A	AEC-Q101 qualified (vs. commercial-grade SMA5J30-E3/5A); identical electrical specs and package	Required for automotive OEM designs; same PCB layout and thermal profile	Select when automotive qualification is mandatory; otherwise SMA5J30-E3/5A suffices for industrial/commercial use
SMC5J30A-E3/57T	DO-214AB (SMC) package - larger footprint, higher I_PPM (17.1 A), same V_WM/V_C	Better suited for higher-energy surges where board space allows; not drop-in compatible	Choose when surge current exceeds 10.3 A or thermal margin must be increased beyond R_θJA = 80 °C/W

Compared with SMA5J30AHE3/5A, the SMA5J30-E3/5A offers identical surge performance at lower cost and qualification tier; compared with SMC5J30A-E3/57T, it trades higher power density and smaller footprint for reduced single-pulse current handling - making it optimal for space-constrained 30 V rail protection where 10.3 A I_PPM is sufficient.

Availability

SMA5J30-E3/5A is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor signal line protection, and consumer power adapter interface applications requiring stable component supply, consistent RoHS compliance, and traceable sourcing.

Supply support for SMA5J30-E3/5A 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The SMA5J series is engineered for high-power-density transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, AEC-Q101 readiness, and repeatable clamping performance are critical.

FAQ

What is the polarity configuration of the SMA5J30-E3/5A?

The SMA5J30-E3/5A is a unidirectional TVS diode: its cathode is marked by a band on the DO-214AC (SMA) package body. It conducts in forward bias like a standard diode and clamps reverse transients above its breakdown voltage. This differs from bi-directional variants (e.g., SMA5J30CA), which lack polarity marking and suppress surges in both directions.

Does the SMA5J30-E3/5A meet automotive qualification standards?

No - the SMA5J30-E3/5A is RoHS-compliant and MSL Level 1 rated, but it carries the "E3" suffix indicating commercial-grade qualification. For AEC-Q101 compliance, select SMA5J30AHE3/5A, which shares identical electrical characteristics and package but includes full automotive stress testing per JESD22 and JESD47.

What is the maximum clamping voltage of the SMA5J30-E3/5A under surge conditions?

The SMA5J30-E3/5A has a maximum clamping voltage (V_C) of 48.4 V at 10.3 A peak pulse current (I_PPM) under the standardized 10/1000 µs waveform. This value is guaranteed across temperature and ensures protected circuitry sees no more than 48.4 V during a 500 W transient event.

Can the SMA5J30-E3/5A be used in place of a bi-directional TVS like SMA5J30CA?

No - the SMA5J30-E3/5A is unidirectional and will conduct continuously if reverse-biased beyond its V_WM in AC or bipolar signal applications. SMA5J30CA is bi-directional and symmetrical; substituting SMA5J30-E3/5A requires circuit redesign to enforce DC polarity and may compromise protection in alternating voltage scenarios.

What is the thermal resistance and recommended pad layout for the SMA5J30-E3/5A?

The SMA5J30-E3/5A has a typical junction-to-ambient thermal resistance (R_θJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. The datasheet specifies this pad size as minimum for rated power dissipation; reducing pad area increases thermal impedance and risks exceeding 150 °C junction temperature during repeated surges.

SMA5J30-E3/5A 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):: 30V

Voltage - Breakdown (Min):: 33.3V

Voltage - Clamping (Max) @ Ipp:: 53.5V

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

Power - Peak Pulse:: 500W

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)

SMA5J30-E3/5A FAQ

1.How can I place an order for SMA5J30-E3/5A through Aetrix?

Please submit a Request for Quotation (RFQ) for SMA5J30-E3/5A 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 SMA5J30-E3/5A reliable?

The price and inventory of SMA5J30-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J30-E3/5A is usually 5 days.

3.What payment methods are accepted for SMA5J30-E3/5A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J30-E3/5A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMA5J30-E3/5A?

SMA5J30-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMA5J30-E3/5A 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 SMA5J30-E3/5A?

For technical support, including SMA5J30-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J30-E3/5A requirements.

6.How does Aetrix verify that SMA5J30-E3/5A is sourced from the original manufacturer or authorized distributors?

All SMA5J30-E3/5A 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 SMA5J30-E3/5A meets industry standards.

7.What is the process for return or replacement of SMA5J30-E3/5A?

All SMA5J30-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J30-E3/5A, 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 SMA5J30-E3/5A part is unused and in its original packaging.

Return procedure for SMA5J30-E3/5A:

1.Submit a request within 90 days.

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

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