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Vishay General Semiconductor - Diodes Division SMAJ30CHE3/61
- Part No.:
- SMAJ30CHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30CHE3/61.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,152
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Product details
Overview
SMAJ30CHE3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on signal or power lines. It features a 30 V stand-off voltage (VWM), 53.5 V maximum clamping voltage (VC) at 7.5 A peak pulse current, 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive reliability.
For engineers reviewing the SMAJ30CHE3/61 datasheet, SMAJ30CHE3/61 pinout, SMAJ30CHE3/61 application, or SMAJ30CHE3/61 equivalent, this part serves as a high-reliability, surface-mount TVS for ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and telecom power rails - with verified clamping performance, low leakage (<1 µA at 30 V), and MSL Level 1 moisture sensitivity.
Technical Context
The SMAJ30CHE3/61 is a bi-directional avalanche diode optimized for fast response (<1 ps) to transient overvoltages, operating symmetrically in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive 10/1000 µs surges.
Rated for -55 °C to +150 °C junction temperature, it delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold. Mounted on 0.2 × 0.2" copper pads, it achieves 120 °C/W junction-to-ambient thermal resistance and supports automated placement per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VC @ IPPM | 53.5 V - Clamped voltage at 7.5 A peak pulse current; limits downstream IC stress during 10/1000 µs transients. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs waveform); sufficient for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges. |
| IPPM | 7.5 A - Peak pulse current capability at rated clamping voltage; validated with 0.2 × 0.2" copper pad layout. |
| ID @ VWM | <1 µA - Reverse leakage at 30 V; minimizes standby power loss in battery-powered sensor nodes. |
| TJ Range | -55 °C to +150 °C - Extended temperature operation suitable for under-hood automotive and industrial control environments. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive-grade discrete semiconductors, including HTRB, HTGB, and temperature cycling. |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case, matte tin-plated leads, RoHS-compliant, MSL Level 1, 260 °C reflow compatible. Bi-directional construction - no cathode band or polarity marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally in either polarity during overvoltage events; no DC bias dependency. |
| Case (body) | Thermal and mechanical interface | Plastic body provides electrical isolation; thermal path relies on soldered lead-to-copper-pad contact, not case mounting. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485, sensor bridges) without polarity concerns. |
| 400 W peak pulse power | Withstands repeated 10/1000 µs surges up to 78 V, supporting robust immunity in automotive load-dump and inductive switching environments. |
| Glass-passivated junction | Ensures stable VBR tolerance (min 33.3 V, max 40.7 V) and long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control modules, ADAS sensors, and body electronics with zero defect requirements. |
| Low-profile DO-214AC | 0.208" × 0.157" footprint enables dense PCB layouts; compatible with standard SMT pick-and-place equipment and reflow profiles. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine compartments exposed to ISO 7637-2 load dump and alternator ripple. IC Role / Device Role / Timing Role: Bi-directional TVS placed between sensor output and microcontroller ADC input to clamp transients before signal conditioning circuitry. Use Value: Limits voltage excursion to ≤53.5 V during 7.5 A surges, preserving 12-bit ADC accuracy and preventing latch-up in 3.3 V or 5 V signal chains. |
Use Scenario: Safeguarding 24 V digital input channels on PLC modules against field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at connector entry point to shunt energy before optocoupler or Schmitt-trigger input stage. Use Value: Maintains 30 V working margin while clamping to 53.5 V, ensuring compatibility with 24 V ±10% industrial supply tolerances and IEC 61000-4-5 compliance. |
| Telecom Power Rail Protection | Consumer USB Port ESD Suppression |
|
Use Scenario: Secondary surge protection on +48 V DC power feeds in PoE-powered network switches and base station radios. IC Role / Device Role / Timing Role: Coordinated clamping device downstream of primary GDT or MOV, limiting let-through voltage to sensitive DC-DC converters. Use Value: Delivers 400 W pulse handling with <1 µA leakage, minimizing standby loss while enabling compact, thermally efficient board-level protection architecture. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines (D+/D−) in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS placed directly at USB connector to divert IEC 61000-4-2 ±15 kV contact discharge. Use Value: Achieves sub-1 µA leakage and fast response without signal integrity degradation - verified for <10 pF junction capacitance at 50 mVp-p, 1 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3/61 | Uni-directional variant; includes cathode band marking and forward voltage drop (~3.5 V @ 25 A). | Requires polarity-aware layout; unsuitable for AC or floating signals but offers lower forward conduction loss in DC power rail protection. | Select SMAJ30AHE3/61 only when protecting unidirectional DC paths (e.g., 24 V supply input) where polarity is fixed and forward conduction matters. |
| SMBJ30CA-E3/52 | Same VWM/VC specs but in larger DO-214AA (SMB) package; 600 W PPPM rating and higher IPPM (12.3 A). | Better thermal dissipation and surge margin; requires larger PCB area and may not fit space-constrained automotive modules. | Choose SMBJ30CA-E3/52 when system-level surge testing exceeds 400 W requirements or when board layout allows larger footprint for enhanced reliability margin. |
Compared with SMAJ30CHE3/61, the uni-directional SMAJ30AHE3/61 adds polarity dependency but enables DC forward conduction, while the SMBJ30CA-E3/52 trades miniaturization for higher surge capacity - making SMAJ30CHE3/61 optimal for space-limited, bi-directional, AEC-Q101–mandated applications.
Availability
SMAJ30CHE3/61 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom power rail surge suppression requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMAJ30CHE3/61 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, precise clamping, and surface-mount manufacturability are mandatory.
FAQ
What is the clamping voltage of the SMAJ30CHE3/61 under a 10/1000 µs surge?
The SMAJ30CHE3/61 clamps to a maximum of 53.5 V at 7.5 A peak pulse current (IPPM) under a 10/1000 µs waveform, as specified in the Vishay datasheet (Document Number 88390, Revision 29-Oct-08). This value is measured with the device mounted on 0.2 × 0.2" copper pads and represents the upper limit of voltage seen by protected circuitry during standardized surge events.
Is the SMAJ30CHE3/61 suitable for automotive applications?
Yes, the SMAJ30CHE3/61 is AEC-Q101 qualified and designated as a high-reliability automotive-grade part (HE3 suffix). It meets stress test requirements including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling - making it appropriate for engine control units, ADAS sensors, and body electronics where long-term stability under thermal and mechanical stress is critical.
Does the SMAJ30CHE3/61 have polarity markings?
No, the SMAJ30CHE3/61 is a bi-directional TVS diode and carries no cathode band or polarity marking. Its symmetrical construction allows installation in either orientation on the PCB, simplifying layout and eliminating risk of reverse placement - a key advantage for protecting AC-coupled or floating signal lines such as those found in CAN, RS-485, or bridge sensor interfaces.
What is the maximum reverse leakage current for the SMAJ30CHE3/61 at its rated standoff voltage?
The SMAJ30CHE3/61 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 30 V stand-off voltage (VWM), measured at 25 °C. This low leakage ensures minimal impact on battery life in always-on automotive or IoT sensor nodes and avoids false triggering in high-impedance monitoring circuits.
What package type does the SMAJ30CHE3/61 use, and is it compatible with standard SMT assembly?
The SMAJ30CHE3/61 uses the DO-214AC (SMA) surface-mount package with matte tin-plated leads, compliant with J-STD-002 and JESD22-B102 solderability standards. It meets MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C - fully compatible with standard lead-free SMT assembly processes and automated placement equipment.
SMAJ30CHE3/61 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ30CHE3/61 FAQ
1.How can I place an order for SMAJ30CHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30CHE3/61 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 SMAJ30CHE3/61 reliable?
The price and inventory of SMAJ30CHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ30CHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ30CHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30CHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30CHE3/61?
SMAJ30CHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30CHE3/61 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 SMAJ30CHE3/61?
For technical support, including SMAJ30CHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30CHE3/61 requirements.
6.How does Aetrix verify that SMAJ30CHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ30CHE3/61 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 SMAJ30CHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ30CHE3/61?
All SMAJ30CHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30CHE3/61, 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 SMAJ30CHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ30CHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ30CHE3/61 Tags
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