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Vishay General Semiconductor - Diodes Division SMAJ530-M3/61
- Part No.:
- SMAJ530-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ530-M3/61.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,089
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Product details
Overview
SMAJ530-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) 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-M3/61 datasheet, SMAJ530-M3/61 pinout, SMAJ530-M3/61 application, or SMAJ530-M3/61 equivalent, key selection criteria include unidirectional polarity, DO-214AC (SMA) package thermal resistance (RθJA = 120 °C/W), clamping performance under 10/1000 µs transients, and AEC-Q101 qualification path via HM3 suffix variants.
Technical Context
The SMAJ530-M3/61 uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes. Its unidirectional architecture blocks reverse conduction above VWM while clamping forward transients to ≤760 V at 400 mA.
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 with temperature at +650 mV/°C, requiring derating above 25 °C per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 530 V - ensures reliable triggering above system DC bus voltage (e.g., 400 V nominal industrial DC link) |
| VWM | 477 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ 400 mA | 760 V - clamped voltage during 10/1000 µs surge, defining worst-case stress on downstream ICs |
| PPPM | 300 W - peak transient power handling capability under standardized surge waveform |
| IFSM | 40 A - non-repetitive surge current rating, critical for fuse coordination and PCB trace sizing |
| TJmax | +150 °C - enables operation in under-hood automotive or enclosed industrial enclosures |
| CJ @ 0 V | 90 pF - parasitic capacitance affecting high-frequency signal integrity in data line protection |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode band marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads, MSL Level 1, RoHS-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected circuit's positive rail or signal line; conducts during overvoltage events |
| Anode | Cathode of internal PN junction | Typically tied to ground or return path; establishes reference for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; peak temperature up to 260 °C supported |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., EFT bursts) |
| Unidirectional polarity only | Prevents reverse conduction in DC-biased systems; eliminates need for series diode in clamp configuration |
| UL 94 V-0 molding compound | Meets flammability requirements for safety-critical industrial and automotive enclosures |
Applications
| Industrial Motor Drives | Automotive Power Distribution |
|---|---|
Use Scenario: Protection of IGBT gate drivers and DC-link capacitors against inductive kickback from contactor switching and regenerative braking. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus rails to clamp voltage spikes exceeding 500 V. Use Value: Limits transient overvoltage to ≤760 V, preventing gate oxide rupture in 600 V-class IGBTs and MOSFETs. |
Use Scenario: Surge suppression on 12 V/24 V battery-fed circuits (e.g., body control modules, lighting controllers) exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary clamping device on main power input, rated for 300 W peak pulse power per ISO 16750-2. Use Value: Withstands 40 A surge current and maintains <1.0 μA leakage at 477 V, ensuring low standby power loss. |
| Telecom Power Supplies | High-Voltage Sensor Interfaces |
Use Scenario: Input-stage protection for AC/DC front-ends in telecom rectifiers subjected to lightning-induced surges on AC mains. IC Role / Device Role / Timing Role: Secondary-level TVS after MOVs, providing precise clamping at 530 V breakdown to protect downstream bridge rectifiers. Use Value: 90 pF capacitance avoids filtering distortion in 50/60 Hz input sensing; 150 °C TJmax supports sealed outdoor cabinet operation. |
Use Scenario: Protection of isolated analog front-ends (e.g., current shunt monitors, HV battery cell sensors) measuring >400 V DC bus voltages. IC Role / Device Role / Timing Role: High-impedance clamping element across differential sensor inputs referenced to high-side potential. Use Value: 760 V clamping ensures ADC input stays within ±10 V common-mode range even during 1 kV/μs transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ550-M3/61 | Higher VBR (550 V min) and VWM (495 V), same package and PPPM | Better suited for 450–500 V nominal systems where tighter margin above operating voltage is required | Select when system VDC exceeds 477 V but must remain below 495 V continuous; clamping rises to 780 V |
| SMCJ530A-M3/61 | Same VBR/VWM, but SMC (DO-214AB) package, 1500 W PPPM, higher IFSM (100 A) | Used where higher surge energy absorption is needed (e.g., primary AC input, EV charging stations) | Choose for enhanced robustness in high-energy environments; requires larger PCB footprint and thermal management |
Compared with SMAJ530-M3/61, SMAJ550-M3/61 offers higher standoff but slightly elevated clamping, while SMCJ530A-M3/61 delivers 5× more pulse power in a larger package - trade-offs between board space, surge margin, and thermal dissipation define optimal selection.
Availability
SMAJ530-M3/61 is available at Aetrix Electronics and suitable for industrial motor drives, automotive power distribution, and telecom power supplies requiring stable component supply, RoHS compliance, and MSL Level 1 manufacturability.
Supply support for SMAJ530-M3/61 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and high-power handling.
The SMAJ series targets high-voltage transient suppression in harsh environments, delivering consistent clamping performance across automotive, industrial, and telecom applications with AEC-Q101 qualification paths.
FAQ
What is the polarity configuration of the SMAJ530-M3/61?
The SMAJ530-M3/61 is unidirectional only, with cathode marked by a color band. It conducts during positive transients relative to its anode and blocks reverse voltage up to 477 V (VWM). This configuration suits DC-biased protection circuits where reverse conduction is not required - unlike bidirectional variants, SMAJ530-M3/61 does not suppress negative-going surges.
How does the clamping voltage of SMAJ530-M3/61 change with temperature?
The SMAJ530-M3/61 exhibits a positive temperature coefficient of +650 mV/°C for VBR, meaning clamping voltage increases linearly with junction temperature. At 125 °C, VC may rise ~65 V above its 25 °C value of 760 V. Designers must apply thermal derating per Fig. 2 in the datasheet to ensure SMAJ530-M3/61 remains within safe operating limits under sustained ambient heat.
Is SMAJ530-M3/61 suitable for automotive applications?
The base SMAJ530-M3/61 is industrial-grade; however, the AEC-Q101 qualified variant SMAJ530HM3_B/H is available for automotive use. While SMAJ530-M3/61 shares identical electrical specs and DO-214AC packaging, only HM3-suffixed versions undergo stress testing per AEC-Q101 - including temperature cycling, HTRB, and ESD - making them appropriate for under-hood ECUs and ADAS power domains.
What is the recommended PCB layout for optimal thermal performance of SMAJ530-M3/61?
Vishay specifies 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve RθJA = 120 °C/W. Thermal vias under pads, internal copper planes, and minimizing trace length reduce junction temperature rise during repetitive surges. SMAJ530-M3/61's RθJL = 30 °C/W means lead-to-pad conduction dominates thermal path - inadequate copper area causes premature thermal runaway during 300 W pulses.
Does SMAJ530-M3/61 meet UL 94 flammability requirements?
Yes, SMAJ530-M3/61 uses a molding compound certified to UL 94 V-0, indicating it self-extinguishes within 10 seconds after flame removal and produces no flaming drips. This rating supports compliance in safety-critical applications such as industrial PLCs, medical power supplies, and automotive junction boxes where fire propagation must be contained.
SMAJ530-M3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 188V
- Voltage - Breakdown (Min):
- 209V
- Voltage - Clamping (Max) @ Ipp:
- 328V
- Current - Peak Pulse (10/1000µs):
- 910mA
- Power - Peak Pulse:
- 300W
- 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)
SMAJ530-M3/61 FAQ
1.How can I place an order for SMAJ530-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ530-M3/61 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 SMAJ530-M3/61 reliable?
The price and inventory of SMAJ530-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ530-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ530-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ530-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ530-M3/61?
SMAJ530-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ530-M3/61 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 SMAJ530-M3/61?
For technical support, including SMAJ530-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ530-M3/61 requirements.
6.How does Aetrix verify that SMAJ530-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ530-M3/61 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 SMAJ530-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ530-M3/61?
All SMAJ530-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ530-M3/61, 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 SMAJ530-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ530-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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