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Vishay General Semiconductor - Diodes Division SMAJ530HM3_A/H
- Part No.:
- SMAJ530HM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ530HM3_A/H.pdf
- Description:
- TVS DIODE 477VWM 760VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,330
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Product details
Overview
SMAJ530HM3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 530 V standoff voltage (VWM), 589–649 V breakdown range (VBR), 400 W peak pulse power (10/1000 μs), 0.91 A peak pulse current (IPPM), and clamps transients to ≤950 V at rated surge. It is widely deployed in industrial power supplies and high-voltage DC bus lines.
For engineers reviewing the SMAJ530HM3_A/H datasheet, SMAJ530HM3_A/H pinout, SMAJ530HM3_A/H application, or SMAJ530HM3_A/H equivalent, key selection criteria include its 530 V stand-off rating, AEC-Q101 qualification status, halogen-free RoHS compliance, low thermal resistance (RθJL = 30 °C/W), and suitability for high-energy lightning surge suppression in telecom and energy infrastructure systems.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage performance and fast response (<1 ns), while the SMA package supports automated SMT placement and meets MSL Level 1 reflow requirements (260 °C peak).
The device is rated for non-repetitive 10/1000 μs surges up to 400 W below 78 V and 300 W above - SMAJ530HM3_A/H falls in the latter category. Its maximum clamping voltage (VC) of 950 V at IPPM ensures predictable voltage limiting during high-energy transients, and its temperature coefficient of VBR (0.108 %/°C) enables stable operation across –55 °C to +150 °C junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 530 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 589 V / 649 V at 1 mA - Confirmed avalanche onset range under standardized test conditions |
| VC @ IPPM | 950 V - Clamped voltage during full-rated 0.91 A surge, defining worst-case overvoltage seen by downstream circuitry |
| PPPM | 300 W - Peak pulse power handling for 10/1000 μs waveform, derated above 78 V per spec |
| IPPM | 0.91 A - Peak surge current capability at rated clamping voltage, directly tied to system-level surge immunity |
| TJ max | +150 °C - Maximum junction temperature enabling use in high-ambient industrial environments |
| RθJL | 30 °C/W - Low junction-to-lead thermal resistance supporting reliable power dissipation without heatsinking |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, single-ended unidirectional configuration with cathode band marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H), compatible with standard 0.2" × 0.2" copper pad layout per datasheet recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional protection topology |
| Cathode | Avalanche conduction terminal | Marked end; connected to protected line (e.g., HV DC bus); conducts during overvoltage events to clamp voltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - supports industrial and transportation applications requiring long-term field stability |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-20D; eliminates brominated flame retardants and heavy metals for eco-conscious manufacturing |
| Low incremental surge resistance | Enables tighter clamping and reduced let-through energy during fast-rising transients (e.g., EFT, lightning-induced surges) |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak - no baking required prior to assembly |
| Glass passivated junction | Provides stable reverse leakage (<1 μA at VWM), consistent VBR tolerance, and enhanced long-term parameter stability vs. epoxy-passivated alternatives |
Applications
| Industrial HV Power Supply Protection | Telecom DC Feeder Line Surge Suppression |
|---|---|
Use Scenario: Protecting rectified 400–600 V DC outputs in switch-mode power supplies against lightning-induced surges and load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed across output capacitor bank to limit overvoltage stress on electrolytics and downstream regulators. Use Value: SMAJ530HM3_A/H's 950 V clamping voltage ensures MOSFETs and controllers remain within safe SOA limits during 300 W surges, extending system MTBF. | Use Scenario: Safeguarding -48 V or -57 V telecom DC distribution lines feeding remote radio units and base station equipment. IC Role / Device Role / Timing Role: Primary overvoltage protector on input side of DC-DC converters, coordinated with upstream GDTs or MOVs in hybrid protection schemes. Use Value: With 530 V VWM and 950 V VC, SMAJ530HM3_A/H provides precise coordination margin versus secondary protectors while surviving repeated 10/1000 μs surges per ITU-T K.20/K.21. |
| Energy Storage System (ESS) Battery Management | Renewable Energy Inverter DC Link Protection |
Use Scenario: Guarding BMS analog front-end inputs and communication interfaces against coupling from high-di/dt battery switching events. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated signal paths (e.g., CAN, SPI) referenced to high-side battery stack voltages up to 500+ V. Use Value: SMAJ530HM3_A/H's 0.108 %/°C VBR tempco ensures minimal drift across wide ambient ranges, preserving protection threshold accuracy in outdoor ESS enclosures. | Use Scenario: Clamping transients on 600–1000 V DC link buses in solar/wind inverters exposed to grid fault recovery spikes and magnetic coupling from AC side. IC Role / Device Role / Timing Role: Parallel-connected TVS array element providing fast, localized clamping adjacent to IGBT modules and gate drivers. Use Value: Its 30 °C/W RθJL allows direct PCB copper thermal coupling, enabling sustained surge handling without discrete heatsinks - reducing bill-of-materials cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ530HE3_A/H | Same electrical specs but RoHS-compliant (non-halogen-free) and commercial-grade only - lacks AEC-Q101 qualification | Not suitable for automotive or mission-critical industrial deployments requiring extended reliability validation | Select when halogen-free content is not mandated and AEC-Q101 is unnecessary |
| SMCJ530A | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VWM/VBR/VC specs | Requires larger PCB footprint and different pad layout; better suited for primary-level surge protection where higher energy absorption is needed | Choose when system-level surge tests exceed 300 W and board space permits larger package |
Compared with SMAJ530HE3_A/H and SMCJ530A, SMAJ530HM3_A/H uniquely combines halogen-free construction, AEC-Q101 qualification, and compact SMA footprint - making it optimal for space-constrained, environmentally regulated, and reliability-critical high-voltage protection nodes.
Availability
SMAJ530HM3_A/H is available at Aetrix Electronics and suitable for industrial power supplies, telecom DC feeder lines, energy storage BMS interfaces, and renewable inverter DC links requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ530HM3_A/H 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, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in demanding environments - targeting industrial automation, telecom infrastructure, and green energy systems where precision clamping and long-term parametric stability are essential.
FAQ
What is the maximum clamping voltage of SMAJ530HM3_A/H and under what test condition is it specified?
The maximum clamping voltage (VC) of SMAJ530HM3_A/H is 950 V, measured at its rated peak pulse current (IPPM) of 0.91 A using a 10/1000 μs double-exponential surge waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated transient event and is confirmed per ANSI/IEEE C62.35 standards in the Vishay datasheet.
Is SMAJ530HM3_A/H suitable for automotive applications?
Yes, SMAJ530HM3_A/H is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and surge endurance - validating its suitability for automotive powertrain, body electronics, and charging infrastructure where reliability under harsh conditions is mandatory. The "HM3" suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction.
How does the thermal performance of SMAJ530HM3_A/H compare to similar TVS diodes in SMA package?
SMAJ530HM3_A/H exhibits a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W, which is among the lowest in the SMA-form-factor TVS category. This enables more efficient heat transfer to PCB copper pads, allowing higher surge repetition rates or longer duty cycles without thermal runaway - especially critical in high-ambient industrial settings where alternatives may derate significantly above 75 °C.
What is the significance of the "_A/H" suffix in SMAJ530HM3_A/H?
Within Vishay's ordering nomenclature, the "_A/H" suffix in SMAJ530HM3_A/H indicates packaging configuration: "A" denotes tape-and-reel format, and "H" specifies a 7-inch diameter reel containing 1800 units. This matches the preferred package code "H" in the Ordering Information table and ensures compatibility with standard SMT pick-and-place feeders.
Does SMAJ530HM3_A/H have bidirectional capability?
No, SMAJ530HM3_A/H is a unidirectional TVS diode, as indicated by the absence of "CA" in its part number and confirmed by its cathode-band marking and single-polarity electrical characteristics. Bidirectional variants (e.g., SMAJ530CA) would exhibit symmetrical breakdown in both directions and lack polarity marking - SMAJ530HM3_A/H is intended for DC line protection where polarity is fixed and clamping is required only in reverse bias.
SMAJ530HM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- 90pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ530HM3_A/H FAQ
1.How can I place an order for SMAJ530HM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ530HM3_A/H 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 SMAJ530HM3_A/H reliable?
The price and inventory of SMAJ530HM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ530HM3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ530HM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ530HM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ530HM3_A/H?
SMAJ530HM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ530HM3_A/H 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 SMAJ530HM3_A/H?
For technical support, including SMAJ530HM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ530HM3_A/H requirements.
6.How does Aetrix verify that SMAJ530HM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ530HM3_A/H 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 SMAJ530HM3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ530HM3_A/H?
All SMAJ530HM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ530HM3_A/H, 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 SMAJ530HM3_A/H part is unused and in its original packaging.
Return procedure for SMAJ530HM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ530HM3_A/H Tags
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