My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ530HM3_B/I
- Part No.:
- SMAJ530HM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ530HM3_B/I.pdf
- Description:
- TVS DIODE 477VWM 760VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,163
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ530HM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 477 V stand-off voltage, 530 V minimum breakdown voltage, 760 V clamping voltage at 400 mA, 300 W peak pulse power, and AEC-Q101 qualified for automotive applications.
For engineers reviewing the SMAJ530HM3_B/I datasheet, SMAJ530HM3_B/I pinout, SMAJ530HM3_B/I application, or SMAJ530HM3_B/I equivalent, key selection factors include unidirectional polarity, 760 V clamping performance under 10/1000 µs surge, thermal resistance of 30 °C/W (junction-to-lead), 90 pF capacitance at 0 V, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
The SMAJ530HM3_B/I operates as a unidirectional avalanche diode that enters conduction when reverse voltage exceeds its 530–550 V breakdown range, limiting transient overvoltage to ≤760 V at 400 mA. Its glass-passivated junction ensures stable breakdown and low leakage (≤1.0 µA at 477 V).
Designed for high-energy transients, it handles non-repetitive 10/1000 µs surges up to 300 W with derating above 25 °C, and features MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 530 V - Ensures reliable triggering above system operating voltage while avoiding false conduction during normal operation |
| VWM | 477 V - Maximum continuous reverse working voltage compatible with 480 V AC-derived DC rails |
| VC @ 400 mA | 760 V - Clamped voltage during 10/1000 µs surge defines maximum stress on downstream ICs or MOSFETs |
| PPPM | 300 W - Peak pulse power rating determines survivability against lightning-induced or inductive-switching transients |
| CJ @ 0 V | 90 pF - Junction capacitance impacts signal integrity on high-speed lines; suitable for <1 MHz analog/power monitoring paths |
| TJ max | +150 °C - Enables operation in under-hood automotive environments with validated thermal design |
| RθJL | 30 °C/W - Low junction-to-lead thermal resistance supports sustained power dissipation with minimal PCB copper area |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode band marking. Dimensions per Vishay spec: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), MSL Level 1, halogen-free, RoHS-compliant, AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current return path during clamping | Connected to ground or low-impedance reference plane; must handle full surge current without trace fusing |
| Cathode | Transient input terminal | Connected to protected line (e.g., battery rail, sensor supply); color band identifies this end |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Stable VBR tolerance and low leakage (<1.0 µA) across temperature and lifetime |
| AEC-Q101 qualification | Validated reliability for automotive powertrain, body control, and ADAS modules requiring extended temperature cycling and humidity exposure |
| Low incremental surge resistance | Enables tighter clamping (760 V at 400 mA) versus higher-resistance TVS devices, reducing voltage overshoot |
| MSL Level 1 rating | Allows standard SMT reflow without pre-baking, simplifying manufacturing for high-volume automotive PCB assembly |
| Matte tin-plated leads | Ensures robust solder joint formation per J-STD-002 and passes JESD 22-B102 whisker testing (Class 2) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ground to clamp surges >477 V before they reach LDOs or microcontrollers. Use Value: Withstands 300 W peak pulses and maintains clamping at ≤760 V, preventing latch-up or gate oxide damage in downstream semiconductors. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to ESD and relay switching noise. IC Role / Device Role / Timing Role: TVS connected across signal and return, absorbing fast transients while adding only 90 pF capacitance to preserve loop bandwidth. Use Value: Low leakage (≤1.0 µA) avoids loading precision current sources; AEC-Q101 qualification ensures long-term stability in harsh industrial enclosures. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered equipment inputs from induced surges on outdoor Ethernet cables or shared power buses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V DC input, coordinated with upstream fuse and secondary filtering. Use Value: 477 V stand-off accommodates 48 V nominal + ripple + tolerance; 760 V clamping limits stress on DC-DC converters and PHY ICs. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine pumps, HVAC blowers). IC Role / Device Role / Timing Role: Mounted across motor terminals or power switch (MOSFET drain-source) to absorb energy during turn-off. Use Value: 40 A IFSM rating handles repetitive commutation spikes; 30 °C/W RθJL enables direct mounting to copper pour for thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ530-M3/61 | Same electrical specs, but industrial grade (not AEC-Q101 qualified); uses 7" tape/reel (1800 pcs) | Lacks automotive qualification; suitable for commercial/industrial designs where AEC-Q101 is not mandated | Select SMAJ530-M3/61 if automotive qualification is unnecessary and smaller reel size aligns with SMT line logistics |
| SMAJ550HM3_B/I | Higher VBR (550 V min) and VWM (495 V); identical package, AEC-Q101, and 300 W rating | Better suited for 48 V systems with wider voltage margins or higher transient thresholds | Choose SMAJ550HM3_B/I when protecting circuits with higher nominal voltage or stricter immunity requirements beyond 477 V |
Compared with SMAJ530HM3_B/I, SMAJ530-M3/61 offers identical protection performance without automotive qualification, while SMAJ550HM3_B/I provides higher voltage headroom-both require no PCB layout change but differ in compliance scope and system voltage compatibility.
Availability
SMAJ530HM3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power inputs, and consumer appliance motor drives requiring stable component supply with AEC-Q101 assurance and consistent 7" or 13" tape-and-reel delivery.
Supply support for SMAJ530HM3_B/I 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 validation.
The SMAJ series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive and industrial systems where space, thermal performance, and qualification rigor are critical.
FAQ
What is the polarity configuration of the SMAJ530HM3_B/I?
The SMAJ530HM3_B/I is a unidirectional transient voltage suppressor diode, meaning it conducts only in reverse bias above its breakdown voltage. The cathode is marked by a color band on the SMA (DO-214AC) package body. This configuration protects positive-rail circuits by shunting surge current to ground when voltage exceeds 530 V, and it blocks normal forward operation. SMAJ530HM3_B/I does not support bidirectional operation.
Is the SMAJ530HM3_B/I qualified for automotive use?
Yes, the SMAJ530HM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation (Document Number 88391). This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock, validating its suitability for automotive powertrain, body electronics, and ADAS applications. SMAJ530HM3_B/I meets the reliability requirements for under-hood and cabin-mounted modules.
What is the clamping voltage of the SMAJ530HM3_B/I under standard test conditions?
The SMAJ530HM3_B/I has a maximum clamping voltage (VC) of 760 V when subjected to a 400 mA, 10/1000 µs double-exponential surge waveform. This value is measured at TA = 25 °C on the recommended pad layout and defines the upper voltage limit imposed on protected circuitry during transient events. SMAJ530HM3_B/I maintains this clamping performance across its operating temperature range with appropriate thermal design.
How does the thermal resistance of the SMAJ530HM3_B/I affect PCB layout?
The SMAJ530HM3_B/I has a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W, enabling efficient heat transfer from the die to the PCB copper via the leads. To maintain TJ ≤ 150 °C during 300 W surges, designers must provide adequate copper area on both anode and cathode pads-Vishay recommends minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. SMAJ530HM3_B/I performance degrades if thermal path impedance increases due to undersized traces or insufficient plating.
What packaging and reel options are available for the SMAJ530HM3_B/I?
The SMAJ530HM3_B/I is supplied in 13" diameter plastic tape and reel with a base quantity of 7500 pieces, identified by the "I" package code in the ordering number. It is also available in 7" reels (1800 pcs) under the variant SMAJ530HM3_B/H. Both versions share identical electrical and qualification specifications, with lead finish, MSL Level 1 rating, and AEC-Q101 compliance unchanged. SMAJ530HM3_B/I supports standard SMT pick-and-place operations without baking.
SMAJ530HM3_B/I 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/I FAQ
1.How can I place an order for SMAJ530HM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ530HM3_B/I 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/I reliable?
The price and inventory of SMAJ530HM3_B/I 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/I is usually 5 days.
3.What payment methods are accepted for SMAJ530HM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ530HM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ530HM3_B/I?
SMAJ530HM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ530HM3_B/I 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/I?
For technical support, including SMAJ530HM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ530HM3_B/I requirements.
6.How does Aetrix verify that SMAJ530HM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMAJ530HM3_B/I 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/I meets industry standards.
7.What is the process for return or replacement of SMAJ530HM3_B/I?
All SMAJ530HM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ530HM3_B/I, 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/I part is unused and in its original packaging.
Return procedure for SMAJ530HM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ530HM3_B/I 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 …
