My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ530HM3_B/H
- Part No.:
- SMAJ530HM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ530HM3_B/H.pdf
- Description:
- TVS DIODE 477VWM 760VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,073
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ530HM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 530 V breakdown voltage (VBR), 477 V working voltage (VWM), and 300 W peak pulse power (PPPM). It protects sensitive ICs, MOSFETs, and sensor signal lines against inductive switching transients and lightning surges in automotive and industrial power electronics.
For engineers reviewing the SMAJ530HM3_B/H datasheet, SMAJ530HM3_B/H pinout, SMAJ530HM3_B/H application, or SMAJ530HM3_B/H equivalent, key selection criteria include clamping voltage (760 V at 400 mA), low leakage (1.0 μA at VWM), AEC-Q101 qualification, thermal resistance (RθJA = 120 °C/W), and unidirectional polarity with cathode band marking.
Technical Context
This TVS diode operates as a fast-acting overvoltage clamp in parallel with protected circuitry, triggering when reverse voltage exceeds its 530 V minimum breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, enabling sub-nanosecond response to 10/1000 μs transients.
Designed for high-reliability environments, SMAJ530HM3_B/H meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and is qualified to AEC-Q101 - confirming suitability for automotive ECUs, battery management systems, and industrial motor drives where junction temperature must remain ≤150 °C under surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 530 V - guarantees reliable conduction onset above system operating voltage to avoid false triggering |
| VWM | 477 V - maximum continuous reverse voltage the device blocks without leakage exceeding 1.0 μA |
| VC @ 400 mA | 760 V - clamped voltage during 10/1000 μs surge, defining worst-case stress on downstream components |
| PPPM | 300 W - peak transient power dissipation capability under standardized 10/1000 μs waveform |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on standard PCB pad layout, critical for thermal derating |
| CJ @ 0 V | 90 pF - junction capacitance limiting impact on high-speed signal integrity in data line protection |
| TJ max | 150 °C - maximum allowable junction temperature, defining safe operating area under repeated surges |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional configuration with cathode indicated by color band. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-impedance return path in unidirectional TVS configuration |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line; color band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over time and temperature, minimizing drift in critical protection thresholds |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| MSL Level 1 rating | Enables single-pass 260 °C lead-free reflow without moisture-induced damage or popcorn effect |
| Low clamping ratio (VC/VBR ≈ 1.43) | Reduces voltage overshoot margin required in protected circuit design versus higher-ratio alternatives |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements for industrial and consumer end equipment |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 48 V battery management system (BMS) monitoring lines from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed across supply rail and ground to clamp surges before they reach ADC inputs or communication ICs. Use Value: Withstands 300 W pulses and maintains VC ≤ 760 V, preventing latch-up or permanent damage to precision analog front-ends. | Use Scenario: Shielding encoder feedback lines and gate driver enable signals in variable-frequency drives exposed to inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on differential RS-485 or PWM control lines to absorb energy from relay coil de-energization. Use Value: 90 pF capacitance avoids signal edge degradation at 1–10 MHz switching frequencies while providing 760 V clamping. |
| Telecom DC Power Input Protection | Consumer Appliance Mainboard Surge Suppression |
Use Scenario: Safeguarding PoE-powered network switches and base station RF modules against lightning-induced surges on 48 V DC input rails. IC Role / Device Role / Timing Role: Primary-level TVS on bulk DC input, coordinated with upstream fuses and secondary-stage MOVs for staged protection. Use Value: 530 V VBR allows operation above nominal 48 V with headroom for ripple, while 300 W PPPM handles multi-kA induced currents. | Use Scenario: Protecting microcontroller I/O pins and display backlight drivers in smart home appliances subjected to ESD and mains-coupled transients. IC Role / Device Role / Timing Role: Point-of-use TVS on USB, UART, and LED driver outputs to limit ESD stress to < 1 kV per IEC 61000-4-2. Use Value: 1.0 μA reverse leakage at 477 V ensures no measurable current draw in standby mode, preserving battery life in always-on devices. |
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-M3/61 | Same electrical specs and SMA package; differs only in packaging format (tape-and-reel, 1800 pcs, code "61") and lacks AEC-Q101 qualification | Targeted at industrial and consumer designs where automotive qualification is not required | Select SMAJ530-M3/61 for cost-sensitive non-automotive production with identical protection performance |
| SMAJ550HM3_B/H | Higher VBR (550 V min) and VWM (495 V); same PPPM, VC, and package; shares AEC-Q101 qualification | Used where system operating voltage is higher (e.g., 54 V nominal telecom or EV auxiliary rails) | Choose SMAJ550HM3_B/H when VWM margin must exceed 477 V while retaining identical thermal and mechanical footprint |
Compared with SMAJ530HM3_B/H, SMAJ530-M3/61 offers identical protection but without automotive qualification, whereas SMAJ550HM3_B/H provides higher standoff voltage for elevated rail applications - both retain the same SMA footprint and clamping behavior, enabling layout reuse where voltage margins allow.
Availability
SMAJ530HM3_B/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial motor drive I/O protection, and telecom DC input surge suppression requiring stable component supply, AEC-Q101 compliance, and consistent thermal performance across production batches.
Supply support for SMAJ530HM3_B/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is designed specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where high-voltage surge immunity and long-term parametric stability are mandatory.
FAQ
What is the breakdown voltage tolerance for SMAJ530HM3_B/H?
The SMAJ530HM3_B/H has a minimum breakdown voltage (VBR) of 530 V at 100 μA test current, with no maximum specified in the datasheet - typical VBR distribution falls within 530–550 V. This unidirectional device is designed to begin clamping reliably above 477 V (its VWM), ensuring safe operation under normal conditions while responding decisively to overvoltage events. The SMAJ530HM3_B/H datasheet confirms this specification on page 2 under Electrical Characteristics.
Is SMAJ530HM3_B/H suitable for automotive applications?
Yes, SMAJ530HM3_B/H is AEC-Q101 qualified, as explicitly stated in the Vishay document 88391 (page 1, Features section). Its qualification covers temperature cycling, humidity testing, and surge endurance under automotive-grade stress profiles. The "HM3" suffix denotes AEC-Q101 compliance, making SMAJ530HM3_B/H appropriate for engine control units, body electronics, and ADAS power domains where certified reliability is mandatory.
What is the clamping voltage of SMAJ530HM3_B/H under standard surge conditions?
The SMAJ530HM3_B/H has a maximum clamping voltage (VC) of 760 V when subjected to a 400 mA, 10/1000 μs waveform - the industry-standard test condition defined in IEC 61000-4-5. This value represents the peak voltage seen by protected circuitry during surge events and is critical for determining whether downstream components remain within their absolute maximum ratings. The SMAJ530HM3_B/H datasheet specifies this parameter on page 2 in the Additional Characteristics table.
Does SMAJ530HM3_B/H have polarity markings, and how is it oriented on PCB?
Yes, SMAJ530HM3_B/H uses a cathode band (a visible color stripe) to identify the cathode terminal, consistent with standard diode polarity convention. During PCB layout, the cathode must be connected to the line being protected (e.g., 48 V rail), and the anode to ground. This unidirectional configuration ensures clamping only during reverse overvoltage events. The SMA (DO-214AC) package outline drawing on page 4 confirms the band position relative to the anode/cathode terminals.
What is the thermal resistance of SMAJ530HM3_B/H, and how does it affect layout?
The SMAJ530HM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended copper pad layout (0.2" × 0.2" per terminal). This value directly impacts surge duty cycle capability: higher ambient temperatures or insufficient copper area increase junction temperature, requiring derating of peak pulse power per Figure 2 in the datasheet. Proper thermal design using SMAJ530HM3_B/H demands adherence to Vishay's pad layout guidelines to maintain safe TJ ≤ 150 °C.
SMAJ530HM3_B/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:
- Active
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ530HM3_B/H FAQ
1.How can I place an order for SMAJ530HM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ530HM3_B/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_B/H reliable?
The price and inventory of SMAJ530HM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SMAJ530HM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ530HM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ530HM3_B/H?
SMAJ530HM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ530HM3_B/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_B/H?
For technical support, including SMAJ530HM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ530HM3_B/H requirements.
6.How does Aetrix verify that SMAJ530HM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMAJ530HM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SMAJ530HM3_B/H?
All SMAJ530HM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ530HM3_B/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_B/H part is unused and in its original packaging.
Return procedure for SMAJ530HM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ530HM3_B/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
