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Vishay General Semiconductor - Diodes Division SMAJ30CAHE3/61
- Part No.:
- SMAJ30CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30CAHE3/61.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,630
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Product details
Overview
SMAJ30CAHE3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 30 V standoff voltage (VWM), 48.4 V maximum clamping voltage at 8.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ30CAHE3/61 datasheet, SMAJ30CAHE3/61 pinout, SMAJ30CAHE3/61 application, or SMAJ30CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT assembly on PCBs requiring robust ESD and lightning surge immunity.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient overvoltage events exceeding its breakdown threshold (min. 33.3 V, max. 36.8 V at 1 mA), it rapidly switches to low-impedance conduction to divert surge current away from downstream circuitry. Its bidirectional symmetry ensures identical clamping behavior in both polarities without polarity marking.
Thermal performance is defined by junction-to-ambient thermal resistance of 120 °C/W and junction-to-lead resistance of 30 °C/W, enabling reliable operation up to +150 °C junction temperature. The device meets MSL Level 1 per J-STD-020 and supports lead-free reflow with peak temperature up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (Breakdown Voltage) | 33.3 V to 36.8 V at 1 mA - Confirmed voltage range where avalanche conduction begins |
| VC (Clamping Voltage) | 48.4 V at 8.3 A IPPM - Peak voltage seen across protected line during worst-case 10/1000 μs surge |
| PPPM (Peak Pulse Power) | 400 W - Surge energy handling capacity under standard 10/1000 μs waveform |
| ID (Reverse Leakage) | 1.0 μA max at 30 V - Minimal DC loading on protected circuit during normal operation |
| TJ Max | +150 °C - Maximum allowable junction temperature for sustained reliability |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no cathode/anode marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve identically as input/output nodes for bidirectional clamping; no polarity dependency |
| Case (body) | Non-electrical mechanical interface | Plastic molding provides insulation and mechanical anchoring; no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges with margin when mounted on 5 mm × 5 mm copper pads |
| AEC-Q101 qualification | Validated for automotive powertrain, body electronics, and ADAS modules requiring extended temperature and life-cycle reliability |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking preconditioning |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to clamp fast-rising spikes before reaching signal conditioning ICs. Use Value: Maintains signal integrity under ±100 V/50 ms load dump events while adding <1 pF capacitance to preserve bandwidth up to 100 MHz. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and 0–10 V analog inputs in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Limits transient voltage to ≤48.4 V during 400 W surges, preventing latch-up or gate oxide damage in precision op-amps and ADC drivers. |
| Consumer Device USB Port ESD Protection | Telecom Line Card Surge Protection |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines in set-top boxes and smart displays exposed to human-body-model (HBM) discharges. IC Role / Device Role / Timing Role: Fast-response clamping device placed after primary common-mode choke to absorb differential-mode ESD energy. Use Value: Responds in <1 ps to 8 kV HBM events and clamps to <48.4 V, meeting IEC 61000-4-2 Level 4 without degrading signal rise time. |
Use Scenario: Front-end surge suppression on Ethernet PHY interfaces and POTS line cards subjected to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: First-stage protector on twisted-pair inputs, working in coordination with gas discharge tubes (GDTs) for staged energy diversion. Use Value: Absorbs initial 400 W surge energy within 10/1000 μs, reducing residual voltage delivered to secondary protection stages by >30 %. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free material compliance is mandated | Choose SMAJ30CA-M3/61 when environmental compliance requires halogen-free packaging |
| SMBJ30CAHE3/61 | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package with higher thermal mass (RθJA = 80 °C/W vs. 120 °C/W) | Better power derating above 75 °C ambient; requires larger PCB footprint | Choose SMBJ30CAHE3/61 for high-temperature industrial environments where thermal headroom is critical |
Compared with SMAJ30CAHE3/61, the SMAJ30CA-M3/61 offers identical protection performance with halogen-free construction, while SMBJ30CAHE3/61 trades smaller footprint for improved thermal dissipation - making SMAJ30CAHE3/61 optimal for space-constrained AEC-Q101 automotive PCBs needing minimal board area.
Availability
SMAJ30CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line card designs requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMAJ30CAHE3/61 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and consumer electronics - delivering standardized TVS performance in compact, automated-assembly-ready packages.
FAQ
What is the clamping voltage of SMAJ30CAHE3/61 at its rated peak pulse current?
The SMAJ30CAHE3/61 has a maximum clamping voltage (VC) of 48.4 V at 8.3 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document 88390 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMAJ30CAHE3/61 suitable for automotive applications?
Yes, SMAJ30CAHE3/61 is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It meets stress test requirements for temperature cycling, humidity bias, and mechanical shock, and is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces where robust transient immunity is mandatory.
How does the bidirectional design of SMAJ30CAHE3/61 affect its PCB layout?
The bidirectional design of SMAJ30CAHE3/61 eliminates polarity constraints: no cathode band marking is present, and either terminal may connect to either side of the protected line. This simplifies layout, enables symmetric placement on differential pairs, and avoids orientation errors during automated assembly - unlike unidirectional variants such as SMAJ30AHE3/61.
What is the thermal resistance of SMAJ30CAHE3/61, and how does it impact power derating?
SMAJ30CAHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2″ × 0.2″ copper pads. At ambient temperatures above 25 °C, its peak pulse power must be linearly derated per Figure 2 in Document 88390 - e.g., at 75 °C ambient, usable PPPM drops to ~280 W, preserving safe junction temperature below 150 °C.
Does SMAJ30CAHE3/61 meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMAJ30CAHE3/61 meets MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can undergo standard lead-free reflow profiles with peak temperatures up to 260 °C without preconditioning or baking. This simplifies manufacturing logistics and reduces risk of popcorning or delamination during assembly.
SMAJ30CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- 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)
SMAJ30CAHE3/61 FAQ
1.How can I place an order for SMAJ30CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30CAHE3/61 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 SMAJ30CAHE3/61 reliable?
The price and inventory of SMAJ30CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ30CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ30CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30CAHE3/61?
SMAJ30CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30CAHE3/61 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 SMAJ30CAHE3/61?
For technical support, including SMAJ30CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ30CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ30CAHE3/61 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 SMAJ30CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ30CAHE3/61?
All SMAJ30CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30CAHE3/61, 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 SMAJ30CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ30CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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