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Vishay General Semiconductor - Diodes Division SMAJ10A-E3/61
- Part No.:
- SMAJ10A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10A-E3/61.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:37,539
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Product details
Overview
SMAJ10A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of sensitive electronics. It features a 10 V stand-off voltage (VWM), 11.1–12.3 V breakdown voltage (VBR) at 1 mA, clamps transients to ≤17.0 V at 23.5 A peak pulse current (IPPM), and delivers 400 W peak pulse power (10/1000 μs waveform) - deployed on power rails and I/O lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ10A-E3/61 datasheet, SMAJ10A-E3/61 pinout, SMAJ10A-E3/61 application, or SMAJ10A-E3/61 equivalent, key selection criteria include its unidirectional polarity, SMA (DO-214AC) package compatibility with automated SMT assembly, AEC-Q101 qualification eligibility (via HE3 suffix variants), and verified clamping performance under repetitive surge conditions per IEC 61000-4-5.
Technical Context
This TVS operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response to ESD and lightning-induced transients. Its low incremental surge resistance (typical <0.3 Ω) and tight VBR tolerance (±5%) ensure predictable clamping behavior across temperature (−55 °C to +150 °C).
The device is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits a thermal resistance of 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads - requiring no heatsink for typical 1–3 pulse-per-second duty cycles in 24 V automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 11.1 V / 12.3 V at 1 mA - defines guaranteed avalanche onset window for design margining |
| VC @ IPPM | ≤17.0 V at 23.5 A - peak clamped voltage during 10/1000 μs surge, protecting downstream MOSFET gate oxides |
| PPPM | 400 W (10/1000 μs) - sustains single high-energy transients common in load-dump events |
| ID @ VWM | ≤1.0 μA - ensures negligible leakage in battery-backed circuits and low-power sensor nodes |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMD footprint compatible with IPC-7351B land patterns |
| TJ max | +150 °C - supports operation in under-hood automotive environments without derating |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; forms current path during reverse-biased clamping |
| Cathode | High-side connection point | Connected to protected line (e.g., 12 V rail); band-marked end accepts positive surge relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables robust protection against ISO 7637-2 Pulse 5a (load dump) in 12 V systems without external series impedance |
| Glass-passivated junction | Ensures stable VBR over 1000+ surge cycles and eliminates parameter drift due to moisture ingress |
| MSL Level 1 (260 °C) | Supports lead-free reflow soldering without popcorn cracking or delamination risks |
| AEC-Q101 qualified option | HE3 suffix variant meets stress test requirements for automotive powertrain and body electronics |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during fast transients, preserving margin for 15 V-rated ICs |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and jump-start surges in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply rail and ground, clamping transients within 1 ns. Use Value: Limits voltage to ≤17.0 V during 400 W surges, preventing latch-up or gate oxide rupture in 20 V-tolerant MCUs. | Use Scenario: Safeguarding analog front-end inputs of pressure sensors exposed to relay coil flyback in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff device mounted directly at connector entry point, shunting inductive kickback to ground. Use Value: Maintains <1.0 μA leakage at 10 V, avoiding signal offset errors in 24-bit delta-sigma ADC reference paths. |
| Consumer USB Power Delivery | Telecom Ethernet PHY Protection |
Use Scenario: Secondary overvoltage clamp on 5 V USB-C VBUS line downstream of primary DC-DC converter. IC Role / Device Role / Timing Role: Fast-response TVS absorbing ESD events (IEC 61000-4-2 ±15 kV contact) before reaching USB controller. Use Value: Clamps ±15 kV ESD pulses to <20 V peak, meeting USB-IF compliance for host port robustness. | Use Scenario: Board-level protection for 10/100BASE-TX transformer center taps against lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Bidirectional-capable family member (SMAJ10CA) used in pairs across differential pairs; SMAJ10A-E3/61 serves as unidirectional alternative where polarity is controlled. Use Value: Delivers 400 W pulse handling with <0.3 Ω dynamic resistance, limiting induced common-mode voltage to safe levels for PHY ESD structures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A-M3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package | No functional difference; selected when halogen-free material compliance is required for end-product certification | Choose for environmental compliance mandates without altering layout or performance |
| SMAJ10CA-E3/61 | Bidirectional version with same VWM (10 V), symmetric clamping in both polarities, no cathode marking | Required for AC-coupled or polarity-agnostic signal lines (e.g., RS-485, CAN bus), not suitable for DC rail protection where polarity is fixed | Select only when bidirectional surge immunity is needed; not a drop-in replacement for unidirectional use cases |
Compared with SMAJ10A-E3/61, the M3 variant offers identical protection performance with halogen-free construction, while the SMAJ10CA-E3/61 provides symmetrical clamping essential for differential or AC signals - neither replaces the original in unidirectional DC applications without circuit review.
Availability
SMAJ10A-E3/61 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and consumer USB power delivery systems requiring stable component supply and full traceability.
Supply support for SMAJ10A-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, automotive qualification, and high-volume manufacturability.
The SMAJ series targets board-level transient suppression in harsh environments, engineered specifically for ISO 7637-2 and IEC 61000-4-5 compliance in automotive, industrial, and telecom infrastructure.
FAQ
What is the maximum clamping voltage of SMAJ10A-E3/61 under a 10/1000 μs surge?
The SMAJ10A-E3/61 clamps to a maximum of 17.0 V when subjected to its rated peak pulse current of 23.5 A (10/1000 μs waveform). This value is guaranteed across temperature and lifetime, ensuring downstream components like 20 V-rated MOSFETs remain within safe operating limits during surge events. The clamping voltage is measured at the device terminals under standardized test conditions defined in ANSI/IEEE C62.35.
Is SMAJ10A-E3/61 suitable for automotive applications?
Yes, SMAJ10A-E3/61 is suitable for automotive applications when used within its specified ratings. While the base E3/61 variant is commercial-grade, Vishay offers the AEC-Q101-qualified SMAJ10AHE3_A/H variant (same electrical specs, HE3 suffix) explicitly validated for automotive powertrain and body electronics. Designers must select the HE3 or HM3 suffix for production automotive use to meet stress-test requirements.
How does the SMAJ10A-E3/61 differ from SMAJ10CA-E3/61?
The SMAJ10A-E3/61 is unidirectional with cathode marking and clamps only in reverse bias, whereas SMAJ10CA-E3/61 is bidirectional with symmetric breakdown in both directions and no polarity marking. Their VWM (10 V), VBR (11.1–12.3 V), and VC (≤17.0 V) are identical, but SMAJ10CA-E3/61 is required for AC or polarity-unknown lines like RS-485 or CAN, while SMAJ10A-E3/61 is optimal for DC rails such as 12 V battery feeds.
What is the thermal resistance of SMAJ10A-E3/61, and how does it affect PCB layout?
SMAJ10A-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This means a 400 W surge causes ~48 °C junction rise above ambient - well within its 150 °C max rating for short pulses. For sustained power dissipation, designers should avoid excessive copper isolation and consider thermal relief traces only if long-term DC leakage heating is a concern.
Does SMAJ10A-E3/61 require a heatsink for standard surge protection use?
No, SMAJ10A-E3/61 does not require an external heatsink for standard transient suppression use. Its 400 W peak pulse rating applies to non-repetitive events (duty cycle ≤0.01%), and the 120 °C/W RθJA is specified for standard PCB pad layouts. Heatsinking is unnecessary unless the application involves frequent repetitive surges (>1 Hz) or elevated ambient temperatures exceeding 100 °C - in which case derating per Figure 2 of the datasheet is mandatory.
SMAJ10A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- 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)
SMAJ10A-E3/61 FAQ
1.How can I place an order for SMAJ10A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10A-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 SMAJ10A-E3/61 reliable?
The price and inventory of SMAJ10A-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 SMAJ10A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ10A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10A-E3/61?
SMAJ10A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10A-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 SMAJ10A-E3/61?
For technical support, including SMAJ10A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10A-E3/61 requirements.
6.How does Aetrix verify that SMAJ10A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ10A-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 SMAJ10A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ10A-E3/61?
All SMAJ10A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10A-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 SMAJ10A-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ10A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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