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Vishay General Semiconductor - Diodes Division SMAJ30C-E3/61
- Part No.:
- SMAJ30C-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30C-E3/61.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,665
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Product details
Overview
SMAJ30C-E3/61 from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) in DO-214AC (SMA) package, designed for clamping voltage transients on signal or power lines. It features 30 V stand-off voltage (VWM), 53.5 V maximum clamping voltage (VC) at 7.5 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs and sensor interfaces in industrial control systems.
For engineers reviewing the SMAJ30C-E3/61 datasheet, SMAJ30C-E3/61 pinout, SMAJ30C-E3/61 application, or SMAJ30C-E3/61 equivalent, key selection criteria include bi-directional surge capability, low clamping ratio (VC/VWM = 1.78), JEDEC-compliant thermal resistance (RθJA = 120 °C/W), and RoHS-compliant matte tin terminations rated for 260 °C solder dip.
Technical Context
The SMAJ30C-E3/61 employs a glass-passivated silicon avalanche junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its bi-directional architecture enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
Rated for 150 °C maximum junction temperature and MSL Level 1 per J-STD-020, it supports reflow and wave soldering with no derating required below 25 °C ambient. The device exhibits 1.0 µA maximum reverse leakage at 30 V and 7.5 A peak pulse current under standardized 10/1000 µs surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping initiates |
| VC @ IPPM | 53.5 V at 7.5 A - Clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 400 W - Peak transient power dissipation capability on 5.0 × 5.0 mm copper pads |
| IPPM | 7.5 A - Maximum non-repetitive surge current supported under standard waveform |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient, defining power derating above 25 °C |
| TJ Range | –55 °C to +150 °C - Operating and storage temperature envelope for industrial reliability |
Pinout & Package
DO-214AC (SMA) surface-mount package with two terminals: cathode-marked end (band) for uni-directional variants; SMAJ30C-E3/61 is bi-directional and unmarked per specification. Terminals are matte tin-plated, compliant with J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | No polarity marking; identical clamping behavior in both directions |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; requires 0.2 × 0.2″ copper pads for full 400 W rating |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables protection of AC-coupled or floating data lines without polarity concerns |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly mounted |
| Low clamping ratio (1.78) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking or special handling |
| RoHS-compliant E3 suffix | Meets JESD201 Class 1A whisker resistance for commercial-grade reliability |
Applications
| Industrial Sensor Interfaces | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to load dump and inductive switching noise in factory automation cabinets. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across sensor output and ground, absorbing ±1 kV EFT bursts. Use Value: Maintains signal integrity by limiting transient excursions to ≤53.5 V, preventing ADC saturation or op-amp latch-up in downstream signal conditioning circuits. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs against battery line transients during jump-start or alternator load dump events. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between LIN data line and chassis ground, clamping surges within 1 ps. Use Value: Enables compliance with ISO 7637-2 Pulse 5a (75 V/300 ms) by holding line voltage below transceiver absolute maximum ratings. |
| Telecom Power Supply Inputs | Consumer USB Port Protection |
|
Use Scenario: Secondary-side DC input protection for PoE-powered network switches subjected to induced lightning surges on Ethernet cabling. IC Role / Device Role / Timing Role: Bi-directional TVS installed across 48 V DC input rails to suppress common-mode transients coupled from data pairs. Use Value: Absorbs up to 400 W of surge energy without degradation, preserving hold-up capacitor and DC-DC controller reliability. |
Use Scenario: Overvoltage suppression on USB 2.0 D+/D− lines in portable media players exposed to ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp placed differential across data pair to shunt ±8 kV HBM ESD pulses. Use Value: Limits voltage excursion to <53.5 V while maintaining signal integrity via minimal parasitic capacitance (typ. <100 pF at 5 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA-E3/61 | Identical electrical specs; CA suffix denotes same bi-directional construction per Vishay documentation | No functional difference - CA and C suffixes both indicate bi-directional configuration in SMAJ family | Select SMAJ30CA-E3/61 only if legacy BOM or distributor inventory mandates CA nomenclature |
| SMCJ33CA | Higher VWM (33 V), higher VC (58.1 V), 1500 W rating in larger DO-214AB (SMC) package | Used where higher surge margin or lower clamping ratio is needed, but requires PCB layout change | Choose SMCJ33CA only when system-level surge testing exceeds 400 W requirements and board space permits larger footprint |
Compared with SMAJ30C-E3/61, SMAJ30CA-E3/61 offers identical protection performance in the same DO-214AC package, while SMCJ33CA trades compact size for 3.75× higher power handling at the cost of increased board area and higher clamping voltage - making SMAJ30C-E3/61 optimal for space-constrained 30 V rail protection.
Availability
SMAJ30C-E3/61 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, telecom power inputs, and consumer USB port protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ30C-E3/61 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, and protection devices with emphasis on reliability and application-specific optimization.
The SMAJ series was engineered for high-volume surface-mount transient suppression in cost-sensitive industrial and automotive systems, balancing robust surge capability with compact DO-214AC packaging and automated assembly compatibility.
FAQ
What does the "C" suffix mean in SMAJ30C-E3/61?
The "C" suffix in SMAJ30C-E3/61 explicitly denotes a bi-directional Transient Voltage Suppressor, meaning it provides symmetrical clamping for both positive and negative voltage transients. This is confirmed in Vishay Document 88390, which states "For bi-directional use C or CA suffix" and specifies that electrical characteristics apply in both directions - critical for protecting AC-coupled or floating signal lines where polarity is undefined.
Is SMAJ30C-E3/61 RoHS compliant and lead-free?
Yes, SMAJ30C-E3/61 is RoHS compliant and lead-free. The "E3" suffix indicates compliance with RoHS Directive 2002/95/EC and WEEE 2002/96/EC, with matte tin-plated leads meeting J-STD-002 and JESD22-B102 solderability standards. It also passes JESD201 Class 1A whisker testing, confirming suitability for commercial-grade applications without lead-based finishes.
What is the maximum clamping voltage of SMAJ30C-E3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ30C-E3/61 is 53.5 V at 7.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table of Vishay Document 88390 and defines the upper voltage limit imposed on protected circuitry during standardized surge events - essential for verifying compatibility with downstream IC absolute maximum ratings.
Can SMAJ30C-E3/61 be used in automotive applications?
SMAJ30C-E3/61 is qualified for commercial-grade operation (–55 °C to +150 °C) and meets MSL Level 1, but it is not AEC-Q101 qualified. For automotive applications requiring qualification, Vishay offers the HE3-suffix variant (e.g., SMAJ30CHE3/61). Use SMAJ30C-E3/61 only in non-safety-critical automotive subsystems where full AEC-Q101 validation is not mandated by design requirements.
What is the thermal resistance of SMAJ30C-E3/61, and how does it affect power handling?
SMAJ30C-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2 × 0.2″ (5.0 × 5.0 mm) copper pads. This value directly determines safe operating power: at 25 °C ambient, full 400 W rating applies; above 25 °C, power must be linearly derated per Figure 2 in Vishay Document 88390 to maintain TJ ≤ 150 °C.
SMAJ30C-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 7.5A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ30C-E3/61 FAQ
1.How can I place an order for SMAJ30C-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30C-E3/61 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 SMAJ30C-E3/61 reliable?
The price and inventory of SMAJ30C-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ30C-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ30C-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30C-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30C-E3/61?
SMAJ30C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30C-E3/61 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 SMAJ30C-E3/61?
For technical support, including SMAJ30C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30C-E3/61 requirements.
6.How does Aetrix verify that SMAJ30C-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ30C-E3/61 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 SMAJ30C-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ30C-E3/61?
All SMAJ30C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30C-E3/61, 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 SMAJ30C-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ30C-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ30C-E3/61 Tags
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