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Vishay General Semiconductor - Diodes Division SMAJ530HE3_A/I
- Part No.:
- SMAJ530HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ530HE3_A/I.pdf
- Description:
- TVS DIODE 477VWM 760VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,430
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Product details
Overview
SMAJ530HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 300 W peak pulse power, 530 V minimum breakdown voltage (VBR), and 760 V maximum clamping voltage (VC) at 400 mA. It protects sensitive ICs and MOSFETs in high-voltage industrial power supplies and automotive ECU input stages against inductive switching transients.
For engineers reviewing the SMAJ530HE3_A/I datasheet, SMAJ530HE3_A/I pinout, SMAJ530HE3_A/I application, or SMAJ530HE3_A/I equivalent, key selection criteria include unidirectional polarity, 477 V working voltage (VWM), 1.0 μA reverse leakage at VWM, 90 pF junction capacitance at 0 V, and AEC-Q101 qualification status indicated by HM3 suffix variants.
Technical Context
This TVS diode operates as a clamping device triggered by overvoltage events exceeding its 530 V breakdown threshold, with fast response time enabling suppression of 10/1000 μs transients. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, while the SMA package provides MSL Level 1 moisture sensitivity compliance and 260 °C lead-free solder compatibility.
Thermal performance is defined by 30 °C/W junction-to-lead thermal resistance and 120 °C/W junction-to-ambient rating on standard PCB pads. The device exhibits a +650 mV/°C temperature coefficient for VBR, requiring derating above 25 °C per published curves, and maintains 150 °C maximum junction temperature under specified pulse conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 530 V - Ensures reliable triggering only above system operating voltage to avoid false conduction |
| VWM | 477 V - Maximum continuous reverse working voltage before leakage exceeds 1.0 μA |
| VC (max) | 760 V at 400 mA - Clamped voltage seen by protected circuit during 10/1000 μs transient |
| PPPM | 300 W - Peak pulse power handling capability for standardized surge waveforms |
| CJ | 90 pF at 0 V - Low capacitance minimizes signal distortion on high-speed data or sensor lines |
| TJ max | 150 °C - Maximum allowable junction temperature for sustained operation and reliability |
| IFSM | 40 A - Non-repetitive forward surge current rating for short-circuit fault protection |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode band marking. Matte tin-plated leads, RoHS-compliant, halogen-free, qualified to JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VBR exceeded |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Stable VBR tolerance and long-term reliability under thermal cycling |
| MSL Level 1 rating | Enables standard SMT reflow without pre-baking; compatible with 260 °C peak profile |
| AEC-Q101 qualification option | Available in HM3 variant for automotive-grade reliability in engine control and ADAS modules |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage stress on downstream components during transient events |
| 90 pF capacitance at 0 V | Preserves signal integrity on 10–100 MHz sensor or communication lines |
Applications
| Industrial Power Input Protection | Automotive ECU Power Rail |
|---|---|
Use Scenario: Protecting AC/DC converter inputs against load dump and inductive kickback in factory automation controllers. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between rectified DC bus and ground. Use Value: Limits transient voltage to ≤760 V, preventing damage to 600 V-rated bridge rectifiers and primary-side MOSFETs. | Use Scenario: Safeguarding 12 V battery-fed microcontroller power rails in body control modules exposed to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standby clamping element on VBAT line upstream of LDO regulators. Use Value: Withstands 300 W surges while maintaining <1.0 μA leakage at 13.5 V nominal, minimizing quiescent current drain. |
| Telecom Line Interface | High-Voltage Sensor Signal Conditioning |
Use Scenario: Shielding RS-485 transceiver I/O pins from lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Secondary-level protection device after gas discharge tube (GDT) front-end. Use Value: 90 pF capacitance avoids signal edge degradation at 10 Mbps data rates; 760 V clamping prevents transceiver latch-up. | Use Scenario: Guarding isolated analog front-ends measuring 400–500 V DC bus voltages in EV battery management systems. IC Role / Device Role / Timing Role: Overvoltage clamp on differential sense amplifier inputs referenced to high-side potential. Use Value: 530 V VBR allows safe margin above 477 V VWM, ensuring no conduction during normal measurement range. |
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; industrial grade, non-AEC-Q101; M3 suffix denotes halogen-free RoHS compliance | Lacks automotive qualification; suitable for commercial/industrial power supplies only | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMAJ530HM3_B/I | Identical VBR, VWM, VC; AEC-Q101 qualified; I-packaging denotes 13" tape-and-reel (7500 pcs) | Validated for automotive underhood environments per AEC-Q101 stress tests | Choose for automotive production programs requiring traceable, qualified components |
Compared with SMAJ530HE3_A/I, the SMAJ530-M3/61 offers identical clamping performance at lower qualification cost, while SMAJ530HM3_B/I adds automotive reliability assurance-neither is pin-compatible in the sense of shared part numbering, but both share identical SMA package dimensions and unidirectional pinout.
Availability
SMAJ530HE3_A/I is available at Aetrix Electronics and suitable for industrial power input protection, automotive ECU power rail hardening, and telecom line interface surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMAJ530HE3_A/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, thermal performance, and application-specific validation.
The SMAJ series was designed specifically for robust transient suppression in high-voltage DC systems where precise clamping, low leakage, and AEC-Q101 readiness are critical-targeting automotive, industrial, and telecom infrastructure applications.
FAQ
What is the exact breakdown voltage range for SMAJ530HE3_A/I?
The SMAJ530HE3_A/I has a minimum breakdown voltage (VBR) of 530 V at 100 μA test current, with typical values extending up to 550 V per family specification. This range ensures consistent triggering above 477 V working voltage while accommodating process variation-critical for protecting 600 V-class power components without nuisance conduction.
Is SMAJ530HE3_A/I AEC-Q101 qualified?
No-SMAJ530HE3_A/I is not AEC-Q101 qualified. The HM3 suffix (e.g., SMAJ530HM3_B/I) denotes AEC-Q101 qualification; HE3_A/I uses Vishay's standard industrial-grade construction. For automotive use, specify the HM3 variant explicitly to ensure compliance with stress testing requirements including temperature cycling and HTRB.
What does the 'HE3_A/I' suffix indicate in SMAJ530HE3_A/I?
The 'HE3_A/I' suffix identifies a specific packaging and revision configuration: 'HE3' refers to Vishay's internal tape-and-reel packaging standard, 'A' is the revision code, and 'I' denotes 13-inch reel format (7500 units). This differs from 'M3/61' (7-inch reel, 1800 units) and 'HM3_B/I' (AEC-Q101, revision B, 13-inch reel).
Can SMAJ530HE3_A/I be used in bidirectional configurations?
No-SMAJ530HE3_A/I is unidirectional only, as confirmed by Vishay documentation. It features a cathode band and conducts surge current from cathode to anode. For bidirectional protection, separate devices such as SMBJ530CA or dual-diode arrays must be selected; using two SMAJ530HE3_A/I in series anti-parallel is not recommended due to mismatched VBR tolerances.
What is the thermal resistance of SMAJ530HE3_A/I under standard mounting conditions?
SMAJ530HE3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W and junction-to-ambient (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. These values govern power derating above 25 °C ambient and inform heatsink or pad design for sustained 2.5 W dissipation capability.
SMAJ530HE3_A/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:
- 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:
- -
- 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)
SMAJ530HE3_A/I FAQ
1.How can I place an order for SMAJ530HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ530HE3_A/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 SMAJ530HE3_A/I reliable?
The price and inventory of SMAJ530HE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ530HE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ530HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ530HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ530HE3_A/I?
SMAJ530HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ530HE3_A/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 SMAJ530HE3_A/I?
For technical support, including SMAJ530HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ530HE3_A/I requirements.
6.How does Aetrix verify that SMAJ530HE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ530HE3_A/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 SMAJ530HE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ530HE3_A/I?
All SMAJ530HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ530HE3_A/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 SMAJ530HE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ530HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ530HE3_A/I Tags
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