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Vishay General Semiconductor - Diodes Division SMA5J12-E3/61
- Part No.:
- SMA5J12-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J12-E3/61.pdf
- Description:
- TVS DIODE 12VWM 22VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,308
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Product details
Overview
SMA5J12-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR), 19.9 V clamping voltage (VC) at 25.1 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to protect automotive ECUs, industrial sensor interfaces, and power supply inputs against ESD and load dump transients.
For engineers reviewing the SMA5J12-E3/61 datasheet, SMA5J12-E3/61 pinout, SMA5J12-E3/61 application, or SMA5J12-E3/61 equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at VWM, AEC-Q101 qualification, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device in series with the protected line and ground, leveraging avalanche breakdown to limit transient overvoltage. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance under repetitive 10/1000 µs surges up to 500 W.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead). It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 1A whisker testing due to its E3 suffix construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 13.3 V / 14.7 V - guaranteed avalanche breakdown range at 1 mA test current |
| VC @ IPPM | 19.9 V - clamped voltage during 25.1 A 10/1000 µs surge, defining worst-case overvoltage seen by downstream circuitry |
| PPPM | 500 W - peak pulse power handling capability, critical for automotive load-dump immunity |
| IR @ VWM | ≤1.0 µA - ultra-low leakage ensures minimal standby power loss in battery-powered systems |
| TJ max | +150 °C - enables operation in under-hood automotive environments without derating |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case with matte tin-plated leads; cathode indicated by band; compliant with UL 94 V-0 flammability rating; footprint compatible with standard SMA land pattern (0.157" × 0.177", 3.99 mm × 4.50 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side for unidirectional surge path | Connected to protected line (e.g., 12 V rail); conducts only during reverse-biased transients |
| Cathode (banded end) | Clamp reference node | Connected to system ground; establishes low-impedance path to shunt surge energy away from ICs/MOSFETs |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%) and long-term reliability under thermal cycling |
| AEC-Q101 qualification | Validated for automotive-grade stress tests including HTGB, HTRB, and temperature cycling |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without preconditioning |
| Low-profile DO-214AC package | Enables high-density PCB layouts and compatibility with automated pick-and-place equipment |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power input of engine control units (ECUs) against ISO 7637-2 Pulse 5a (load dump) and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and local regulator input. Use Value: Limits transient voltage to ≤19.9 V, preventing damage to downstream LDOs and microcontrollers rated for 16 V absolute maximum. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA transmitter) in factory automation PLC modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Bidirectional-capable protection (though SMA5J12-E3/61 is unidirectional, used in grounded-signal configurations) across signal-to-ground path. Use Value: Clamps induced transients within 1 ns response time while adding <1 pF capacitance, preserving signal integrity up to 100 kHz bandwidth. |
| DC Power Supply Input Protection | Consumer Electronics USB Port Protection |
Use Scenario: Securing 12 V input of wall-adapted AC/DC converters against lightning-induced surges on building wiring. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of input filter capacitor and bridge rectifier. Use Value: Absorbs 500 W peak pulses without degradation, maintaining >1000 surge cycles per JEDEC standards. | Use Scenario: Adding secondary-level surge margin to USB VBUS line in portable docking stations subjected to hot-plug ESD. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, protecting USB controller's VBUS pin. Use Value: Provides 19.9 V clamping at 25.1 A with ≤1.0 µA leakage, avoiding false overvoltage shutdowns during normal 5 V operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J12AHE3/61 | AEC-Q101 qualified variant with identical electrical specs; HE3 suffix denotes enhanced whisker resistance (JESD201 Class 2) | Required for automotive safety-critical modules where extended whisker reliability is mandated | Select SMA5J12AHE3/61 when full AEC-Q101 compliance documentation and whisker test reports are contractually required |
| SMC5J12A-E3/73 | Same VWM/VC but in larger DO-214AB (SMC) package; higher thermal mass supports >1000 W surge capability | Suitable for high-reliability industrial power supplies needing >500 W single-pulse rating | Choose SMC5J12A-E3/73 when board space allows and peak surge energy exceeds 500 W limits of SMA package |
Compared with SMA5J12-E3/61, SMA5J12AHE3/61 adds whisker-test assurance without changing clamping behavior, while SMC5J12A-E3/73 trades compactness for higher surge endurance - both require layout revision due to different footprints and are not pin-compatible replacements.
Availability
SMA5J12-E3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and DC power supply input protection requiring stable component supply, RoHS compliance, and AEC-Q101 traceability.
Supply support for SMA5J12-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 high-reliability, automotive-qualified components.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust transient suppression in harsh environments such as automotive power systems and industrial control cabinets.
FAQ
What is the clamping voltage of the SMA5J12-E3/61 under a 10/1000 µs surge?
The SMA5J12-E3/61 has a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current of 25.1 A with a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the SMA5J12-E3/61 suitable for automotive applications?
Yes, the SMA5J12-E3/61 is AEC-Q101 qualified and rated for operation from -55 °C to +150 °C, making it suitable for under-hood and body-control module applications. Its glass-passivated junction, MSL Level 1 rating, and JESD201 Class 1A whisker resistance support reliable deployment in automotive power distribution and sensor interface circuits where SMA5J12-E3/61 is specified.
What does the "E3/61" suffix indicate in SMA5J12-E3/61?
The "E3" suffix indicates RoHS-compliant, commercial-grade construction with matte tin plating and JESD201 Class 1A whisker resistance. The "/61" denotes packaging in 7-inch plastic tape-and-reel format with 1800 units per reel - a standard logistics configuration for SMT assembly lines using SMA5J12-E3/61 in high-volume production.
How does the SMA5J12-E3/61 differ from bi-directional variants like SMA5J12CA?
The SMA5J12-E3/61 is unidirectional and features a cathode band for polarity identification, while SMA5J12CA is bi-directional with no marking. Electrically, SMA5J12-E3/61 conducts only during reverse surges, whereas SMA5J12CA clamps in both directions - meaning SMA5J12-E3/61 must be oriented correctly in-circuit, unlike SMA5J12CA which is orientation-agnostic.
What is the thermal resistance of the SMA5J12-E3/61, and how does it affect layout design?
The SMA5J12-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W and junction-to-lead (RθJL) of 25 °C/W. To maintain safe operation at full 500 W surge rating, the PCB must use minimum 5.0 mm × 5.0 mm copper pads per terminal as specified - undersized pads increase RθJA, risking thermal runaway during repeated surges.
SMA5J12-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 22.7A
- Power - Peak Pulse:
- 500W
- 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)
SMA5J12-E3/61 FAQ
1.How can I place an order for SMA5J12-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J12-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 SMA5J12-E3/61 reliable?
The price and inventory of SMA5J12-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 SMA5J12-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J12-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J12-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J12-E3/61?
SMA5J12-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J12-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 SMA5J12-E3/61?
For technical support, including SMA5J12-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J12-E3/61 requirements.
6.How does Aetrix verify that SMA5J12-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J12-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 SMA5J12-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J12-E3/61?
All SMA5J12-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J12-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 SMA5J12-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J12-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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