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Vishay General Semiconductor - Diodes Division SMAJ530-E3/5A
- Part No.:
- SMAJ530-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ530-E3/5A.pdf
- Description:
- TVS DIODE 477VWM 760VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,696
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Product details
Overview
SMAJ530-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) diode designed for high-voltage surge protection in power and signal lines. It features a 530 V minimum breakdown voltage (VBR), 477 V maximum working voltage (VWM), 760 V clamping voltage at 400 mA, 300 W peak pulse power (10/1000 µs), and operates from –55 °C to +150 °C - deployed in industrial motor drives and automotive power distribution units.
For engineers reviewing the SMAJ530-E3/5A datasheet, SMAJ530-E3/5A pinout, SMAJ530-E3/5A application, or SMAJ530-E3/5A equivalent, key selection criteria include unidirectional polarity, DO-214AC (SMA) package compatibility, thermal resistance (RθJA = 120 °C/W), clamping performance under 400 mA surge, and AEC-Q101 qualification path via HM3 variants.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its unidirectional architecture provides reverse-biased clamping only, with VBR specified at 100 µA test current and VC measured under standardized 10/1000 µs waveform.
Thermal design relies on PCB copper pad layout per JEDEC standards: RθJL = 30 °C/W (junction-to-lead) and RθJA = 120 °C/W (junction-to-ambient) assume 0.2" × 0.2" copper pads. Clamping voltage increases linearly with temperature due to +650 mV/°C VBR coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 530 V - ensures reliable conduction above system DC bus voltage during transients |
| VWM | 477 V - maximum continuous reverse operating voltage without leakage degradation |
| VC @ 400 mA | 760 V - clamped voltage limiting stress on downstream MOSFETs or ICs during 10/1000 µs surge |
| PPPM | 300 W - peak surge power handling capability under standard lightning-surge waveform |
| IFSM | 40 A - non-repetitive forward surge current rating for inductive switch-off events |
| TJ max | +150 °C - enables operation in under-hood automotive or high-temperature industrial enclosures |
| CJ @ 0 V | 90 pF - low capacitance preserves signal integrity on high-speed lines up to ~200 MHz |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode band marking. Matte tin-plated leads, RoHS-compliant, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping loop closure |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling |
| MSL Level 1 compliance | Supports single-reflow assembly without moisture-induced popcorn failure |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 5a) |
| 90 pF junction capacitance | Permits use on 24 V CAN FD or RS-485 data lines without signal distortion |
| AEC-Q101 qualification path | HM3 suffix variants support automotive power module designs requiring stress-tested components |
Applications
| Industrial Motor Drives | Automotive Power Distribution |
|---|---|
Use Scenario: Protection of IGBT gate drivers and DC-link capacitors against switching-induced voltage spikes in 400 V inverters. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive-going transients on high-side power rails. Use Value: Limits VC to 760 V, preventing gate oxide rupture in 650 V-rated IGBTs during load dump events. | Use Scenario: Surge suppression on 12 V/24 V battery feed lines in junction boxes exposed to load dump (ISO 16750-2). IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs 300 W pulses without thermal runaway. Use Value: Withstands 40 A IFSM, enabling robust protection without fuse coordination delays. |
| Telecom Power Supplies | Industrial PLC I/O Modules |
Use Scenario: Input-stage protection for AC/DC front-ends subjected to lightning-induced surges on primary-side rectifiers. IC Role / Device Role / Timing Role: High-VWM TVS blocks normal 400 VDC bus but triggers at >530 V transients. Use Value: 477 V VWM avoids leakage-related efficiency loss while maintaining margin over nominal bus voltage. | Use Scenario: Field-side analog input protection against ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance (90 pF) TVS prevents bandwidth reduction on 0–10 V sensor inputs. Use Value: Preserves signal fidelity up to 200 MHz, critical for high-resolution ADC sampling accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ530-M3/5A | Same electrical specs; identical VBR, VWM, VC, PPPM; differs only in packaging tape/reel size (7500 pcs vs. 5A reel code) | No functional difference; both meet same industrial-grade reliability and RoHS requirements | Select SMAJ530-E3/5A for legacy procurement alignment; SMAJ530-M3/5A for new designs using Vishay's updated M3 suffix nomenclature |
| SMAJ550-E3/5A | Higher VBR (550 V min) and VWM (495 V); same PPPM, VC = 790 V, and package | Better suited for 480 VAC-derived DC buses where higher standoff is required | Choose SMAJ550-E3/5A when system nominal voltage exceeds 477 V but must retain SMA footprint and thermal profile |
Compared with SMAJ530-E3/5A, SMAJ530-M3/5A offers identical protection performance with updated suffixing, while SMAJ550-E3/5A trades 20 V higher standoff for slightly elevated clamping - enabling selective voltage-margin scaling without PCB redesign.
Availability
SMAJ530-E3/5A is available at Aetrix Electronics and suitable for industrial motor drives, automotive power distribution, and telecom power supplies requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SMAJ530-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 and application-specific optimization.
The SMAJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where sustained surge immunity and thermal stability are critical.
FAQ
What is the maximum clamping voltage of the SMAJ530-E3/5A under standard surge conditions?
The SMAJ530-E3/5A has a maximum clamping voltage (VC) of 760 V when subjected to a 400 mA, 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ530-E3/5A maintains this clamping performance across its rated junction temperature range (–55 °C to +150 °C), with VC increasing predictably due to its +650 mV/°C VBR temperature coefficient.
Is the SMAJ530-E3/5A suitable for automotive applications?
The SMAJ530-E3/5A itself is an industrial-grade part, but Vishay offers the functionally identical SMAJ530HM3_B variant qualified to AEC-Q101. While SMAJ530-E3/5A shares the same electrical characteristics and DO-214AC package, it lacks formal automotive qualification. For automotive power distribution modules requiring stress-tested components, the HM3 suffix version should be selected. The SMAJ530-E3/5A remains appropriate for non-automotive industrial systems with similar surge profiles.
What does the "E3/5A" suffix indicate in SMAJ530-E3/5A?
The "E3" denotes Vishay's standard halogen-free, RoHS-compliant construction, while "5A" specifies the packaging format: 13-inch diameter plastic tape and reel containing 7500 units. This differs from "61" (7-inch reel, 1800 units) and "H"/"I" codes used for AEC-Q101 variants. The SMAJ530-E3/5A is fully compatible with standard SMT placement equipment and reflow profiles defined for MSL Level 1 components.
How does the thermal resistance of the SMAJ530-E3/5A affect PCB layout?
The SMAJ530-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To maintain TJ ≤ 150 °C under 300 W peak pulse loads, designers must ensure adequate copper area and minimize thermal bottlenecks. Reducing pad size or omitting thermal vias increases RθJA, risking premature thermal shutdown or parametric shift. The SMAJ530-E3/5A datasheet provides exact mounting pad dimensions to achieve rated thermal performance.
Can the SMAJ530-E3/5A be used in bidirectional configurations?
No - the SMAJ530-E3/5A is strictly unidirectional, with polarity marked by a cathode band. It clamps only reverse-biased transients (anode negative relative to cathode). For bidirectional protection, two SMAJ530-E3/5A devices must be connected in series opposition, or a dedicated bidirectional TVS such as SMBJ530CA should be selected. Using SMAJ530-E3/5A in reverse bias without accounting for polarity will result in immediate conduction and potential failure.
SMAJ530-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):
- 477V
- Voltage - Breakdown (Min):
- 530V
- Voltage - Clamping (Max) @ Ipp:
- 760V
- Current - Peak Pulse (10/1000µs):
- 400mA
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 90pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ530-E3/5A FAQ
1.How can I place an order for SMAJ530-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ530-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 SMAJ530-E3/5A reliable?
The price and inventory of SMAJ530-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 SMAJ530-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ530-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ530-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ530-E3/5A?
SMAJ530-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ530-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 SMAJ530-E3/5A?
For technical support, including SMAJ530-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ530-E3/5A requirements.
6.How does Aetrix verify that SMAJ530-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ530-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 SMAJ530-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ530-E3/5A?
All SMAJ530-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ530-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 SMAJ530-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ530-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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