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Vishay General Semiconductor - Diodes Division SMAJ11C-E3/61
- Part No.:
- SMAJ11C-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11C-E3/61.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,045
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Product details
Overview
SMAJ11C-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 and power lines. It features a 11 V stand-off voltage (VWM), 20.1 V maximum clamping voltage (VC) at 19.9 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ11C-E3/61 datasheet, SMAJ11C-E3/61 pinout, SMAJ11C-E3/61 application, or SMAJ11C-E3/61 equivalent, this page delivers verified electrical parameters, bi-directional TVS functionality, DO-214AC mechanical data, clamping performance under standardized surge conditions, and direct alternatives for ESD and lightning transient protection design.
Technical Context
The SMAJ11C-E3/61 operates as a bi-directional avalanche diode, exhibiting symmetrical breakdown behavior in both polarities with no polarity marking. Its silicon junction is glass passivated, enabling stable leakage performance (≤1.0 µA at VWM) and reliable response to fast transients (sub-nanosecond turn-on).
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation from –55 °C to +150 °C junction temperature. It meets J-STD-020 MSL Level 1 and withstands solder reflow up to 260 °C for 40 s, confirming suitability for automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V nominal systems. |
| VC @ IPPM | 20.1 V - Clamped voltage at 19.9 A peak pulse current; ensures protected downstream devices see ≤20.1 V during 10/1000 µs surge. |
| IPPM | 19.9 A - Peak surge current capability with 10/1000 µs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) compliance when properly laid out. |
| PPPM | 400 W - Peak pulse power dissipation; rated at TA = 25 °C on 0.2 × 0.2″ copper pads, derated above ambient per Fig. 2. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at stand-off voltage; low leakage preserves signal integrity in high-impedance sensor or communication lines. |
| TJ Range | –55 °C to +150 °C - Full industrial and automotive junction temperature range; validated for under-hood and motor-control environments. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional device with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles; bidirectional clamping occurs regardless of voltage polarity - no orientation required during placement. |
| Case (body) | Thermal and mechanical interface | DO-214AC molded body provides UL 94 V-0 flammability rating and transfers heat to PCB copper pads via lead frames. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, encoder outputs) without polarity concerns. |
| 400 W peak pulse power | Supports robust immunity to IEC 61000-4-5 surges up to 1 kV open-circuit / 0.5 kV short-circuit when mounted per recommended pad layout. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage current across temperature and humidity stress, critical for automotive AEC-Q101 alignment. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile use (peak 260 °C), eliminating bake requirements and simplifying manufacturing logistics. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting crankshaft position sensor output lines from load dump and inductive switching transients in engine control units. IC Role / Device Role / Timing Role: Bi-directional TVS clamping transient energy before it reaches the analog front-end amplifier or microcontroller ADC input. Use Value: Maintains signal fidelity under ISO 7637-2 Pulse 5a (75 V/100 ms) by limiting voltage to ≤20.1 V, preventing ADC saturation or latch-up. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., SN65HVD230) against ESD and cable discharge events in factory automation networks. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed directly at connector entry point to shunt surge current away from transceiver pins. Use Value: Achieves IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact) protection without adding series impedance or distorting 10 Mbps differential signaling. |
| Consumer Power Adapter Input | Motor Drive Gate Driver Protection |
Use Scenario: Suppressing line-side surges on secondary-side 12 V DC outputs of wall adapters used in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive switching noise and lightning-induced spikes on low-voltage DC rails. Use Value: Prevents brownout or reset events in PMICs and microcontrollers by holding rail voltage within ±10 % of nominal during 10/1000 µs transients. |
Use Scenario: Clamping Miller-induced voltage spikes on high-side gate driver supply rails (e.g., IR2110 bootstrap circuit) in BLDC inverters. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF), low-leakage TVS placed between gate driver VCC and COM to suppress dV/dt coupling. Use Value: Eliminates false turn-on of power MOSFETs by clamping spikes to <20.1 V while adding negligible capacitive loading to high-frequency gate drive paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11CA-E3/61 | Identical electrical specs and packaging; "CA" suffix explicitly denotes bi-directional variant per Vishay naming convention (C = bi-directional, A = enhanced reliability grade). | No functional difference - both rated for same surge levels and thermal profiles; CA variant may carry additional AEC-Q101 qualification documentation. | Select SMAJ11CA-E3/61 when formal automotive qualification evidence is contractually required; otherwise SMAJ11C-E3/61 is functionally identical. |
| SMCJ11CA | Same VWM (11 V) and VC (20.1 V), but in larger DO-214AB (SMC) package with 1500 W PPPM rating and higher IPPM (86.6 A). | Used where higher surge energy handling is needed (e.g., main power input vs. signal line); requires larger PCB footprint and different pad layout. | Choose SMCJ11CA only if system-level surge testing exceeds 400 W - SMAJ11C-E3/61 remains optimal for space-constrained signal-level protection. |
Compared with SMAJ11C-E3/61, SMAJ11CA-E3/61 offers identical protection performance with potential AEC-Q101 traceability, while SMCJ11CA trades compactness for 3.75× higher surge capacity - making SMAJ11C-E3/61 the preferred choice for cost-sensitive, space-limited bi-directional clamping on signal and low-power rails.
Availability
SMAJ11C-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and consumer power adapter outputs requiring stable component supply, RoHS-compliant sourcing, and full traceability from wafer to shipment.
Supply support for SMAJ11C-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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive-grade validation.
The SMAJ series was developed specifically for surface-mount transient suppression in space-constrained, high-reliability applications - balancing low clamping voltage, fast response, and robust surge handling in the DO-214AC footprint.
FAQ
What is the clamping voltage of SMAJ11C-E3/61 at its rated peak pulse current?
The SMAJ11C-E3/61 has a maximum clamping voltage (VC) of 20.1 V at its specified peak pulse current (IPPM) of 19.9 A, measured using the standard 10/1000 µs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and confirms that downstream components will not experience voltages exceeding 20.1 V during transient events - a critical parameter for safeguarding 3.3 V or 5 V logic interfaces connected to the protected line.
Is SMAJ11C-E3/61 unidirectional or bidirectional, and how is polarity indicated?
SMAJ11C-E3/61 is a bi-directional Transient Voltage Suppressor, meaning it clamps voltage transients equally in both polarities. As stated in the Vishay datasheet, bi-directional types like SMAJ11C-E3/61 have no polarity marking - the device body is unmarked and terminals are functionally identical. This eliminates orientation errors during automated placement and simplifies layout for AC-coupled or floating signal paths such as CAN bus or differential sensors.
Does SMAJ11C-E3/61 meet automotive qualification standards?
SMAJ11C-E3/61 is RoHS-compliant and manufactured to Vishay's commercial-grade specifications (E3 suffix). While it shares the same die and construction as the AEC-Q101-qualified SMAJ11CA-HE3 variants, the SMAJ11C-E3/61 itself is not explicitly certified to AEC-Q101. For automotive applications requiring formal qualification, engineers should specify SMAJ11CA-HE3/61 or verify qualification status directly with Vishay documentation for the exact part number.
What is the maximum reverse leakage current for SMAJ11C-E3/61 at its stand-off voltage?
The SMAJ11C-E3/61 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its stand-off voltage (VWM) of 11 V, measured at TA = 25 °C. This low leakage ensures minimal power loss and signal distortion in high-impedance circuits such as precision sensor bias networks or battery-monitoring inputs - a key advantage over higher-leakage alternatives that could compromise accuracy or battery life.
Can SMAJ11C-E3/61 be used in place of SMAJ11A-E3/61?
No - SMAJ11C-E3/61 and SMAJ11A-E3/61 are not interchangeable. SMAJ11C-E3/61 is bi-directional with VBR min/max = 12.2 V / 14.9 V, while SMAJ11A-E3/61 is uni-directional with tighter VBR tolerance (12.2 V / 13.5 V) and a cathode band marking. Substituting one for the other risks incorrect clamping behavior, especially in AC or floating circuits. Always match device directionality and breakdown specifications to the circuit topology.
SMAJ11C-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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 19.9A
- 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)
SMAJ11C-E3/61 FAQ
1.How can I place an order for SMAJ11C-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11C-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 SMAJ11C-E3/61 reliable?
The price and inventory of SMAJ11C-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 SMAJ11C-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ11C-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11C-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11C-E3/61?
SMAJ11C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11C-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 SMAJ11C-E3/61?
For technical support, including SMAJ11C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11C-E3/61 requirements.
6.How does Aetrix verify that SMAJ11C-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ11C-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 SMAJ11C-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ11C-E3/61?
All SMAJ11C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11C-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 SMAJ11C-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ11C-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ11C-E3/61 Tags
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