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Vishay General Semiconductor - Diodes Division SMA5J12HE3/61
- Part No.:
- SMA5J12HE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J12HE3/61.pdf
- Description:
- TVS DIODE 12VWM 22VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,205
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Product details
Overview
SMA5J12HE3/61 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 standoff voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V clamping voltage (VC) at 25.1 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 µs waveform - used in automotive power supply input stages to protect downstream MOSFETs and microcontrollers.
For engineers reviewing the SMA5J12HE3/61 datasheet, SMA5J12HE3/61 pinout, SMA5J12HE3/61 application, or SMA5J12HE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant HE3 suffix (JESD 201 Class 2 whisker test), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at 12 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
The device uses a planar silicon junction structure optimized for fast response (<1 ns), low incremental surge resistance, and minimal capacitance (typically <200 pF at 0 V), making it suitable for protecting sensitive analog and digital interfaces without signal distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 12 V systems. |
| VBR min/max | 13.3 V / 14.7 V at 1 mA - tight breakdown window ensures predictable turn-on across temperature and lot variation. |
| VC @ IPPM | 19.9 V at 25.1 A - clamping voltage during 500 W surge; limits stress on protected ICs to safe levels. |
| PPPM | 500 W - peak pulse power handling with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures. |
| Polarity | Unidirectional - cathode band marked; blocks forward current until breakdown, ideal for DC-biased lines. |
| MSL Level | Level 1 per J-STD-020 - no floor life limitation; compatible with standard reflow profiles up to 260 °C peak. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case meeting UL 94 V-0. Cathode band denotes terminal polarity; leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage return path; completes shunt path during overvoltage event. |
| Cathode | Protected line interface | Connected to the line being protected (e.g., 12 V supply rail); carries full surge current when clamping. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for engine control, body electronics, and ADAS modules. |
| Glass passivated junction | Eliminates surface contamination sensitivity and improves long-term VBR stability under humidity and bias stress. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, enabling tighter clamping than Zener-based alternatives. |
| MSL Level 1 rating | Enables direct placement into high-volume SMT lines without dry-packaging or baking - reduces manufacturing cost and risk. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECU power input exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS clamping transient energy before it reaches LDOs and MCU power pins. Use Value: Limits voltage to ≤19.9 V during 500 W surges, preventing latch-up or gate oxide damage in downstream 20 V-rated components. | Use Scenario: 4–20 mA current loop sensor output connected to PLC analog input in factory automation. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp on signal line against ESD (IEC 61000-4-2) and inductive switching noise. Use Value: Sub-1 ns response and <200 pF capacitance preserve signal integrity while suppressing ±15 kV contact discharge events. |
| Consumer USB Port Power Rail Protection | Telecom DSL Line Interface Protection |
Use Scenario: VBUS line of USB 2.0 host port subjected to hot-plug transients and external ESD coupling. IC Role / Device Role / Timing Role: Primary DC rail TVS placed upstream of USB power switch and polyfuse. Use Value: 12 V VWM aligns with 5 V nominal + tolerance margin; 500 W rating handles multiple sequential surges without degradation. | Use Scenario: DSL line driver/receiver pair exposed to lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: First-stage shunt protector on line side of isolation transformer and front-end amplifier. Use Value: High PPPM and robust thermal resistance (RθJA = 80 °C/W) sustain repeated 10/1000 µs surges without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J12A-E3/61 | Commercial grade (non-AEC-Q101), same electrical specs and DO-214AC package. | Lacks automotive qualification; unsuitable for under-hood or safety-critical ECUs. | Select SMA5J12HE3/61 for automotive OEM programs; use SMA5J12A-E3/61 only in consumer or industrial non-automotive designs. |
| SMC5J12HE3/61 | Same AEC-Q101 qualification and electrical specs, but in larger DO-214AB (SMC) package with higher thermal mass. | Higher RθJA derating and 1500 W PPPM rating; suited for higher-energy surge environments. | Choose SMC5J12HE3/61 where board space allows and surge energy exceeds 500 W; retain SMA5J12HE3/61 for compact 12 V rail protection. |
Compared with SMA5J12A-E3/61, SMA5J12HE3/61 adds automotive qualification and enhanced whisker resistance; compared with SMC5J12HE3/61, it trades lower surge capacity for smaller footprint and faster layout integration in space-constrained modules.
Availability
SMA5J12HE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom line protection requiring stable component supply, AEC-Q101 compliance, and high-reliability surge immunity.
Supply support for SMA5J12HE3/61 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, surface-mount surge protection in automotive, industrial, and communications infrastructure applications.
FAQ
What is the clamping voltage of the SMA5J12HE3/61 under a 500 W surge?
The SMA5J12HE3/61 has a maximum clamping voltage (VC) of 19.9 V at 25.1 A peak pulse current, corresponding to a 10/1000 µs waveform delivering 500 W. This value is measured per JEDEC standards and guarantees that protected circuitry sees no more than 19.9 V during such an event - critical for ensuring compatibility with 20 V absolute maximum rated components downstream of the SMA5J12HE3/61.
Is the SMA5J12HE3/61 suitable for automotive applications?
Yes, the SMA5J12HE3/61 is AEC-Q101 qualified and explicitly rated for automotive use. Its HE3 suffix indicates compliance with JESD 201 Class 2 whisker testing, and its 150 °C maximum junction temperature supports under-hood deployment. The SMA5J12HE3/61 is commonly used in body control modules, infotainment power supplies, and ADAS camera ECU inputs where ISO 7637-2 and ISO 16750-2 compliance is required.
How does the SMA5J12HE3/61 differ from the SMA5J12A-E3/61?
The SMA5J12HE3/61 differs from the SMA5J12A-E3/61 solely in qualification and plating: both share identical electrical characteristics (VWM = 12 V, VC = 19.9 V, PPPM = 500 W), DO-214AC package, and marking code 5BE. However, SMA5J12HE3/61 carries AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, whereas SMA5J12A-E3/61 is commercial-grade with Class 1A plating - making the former mandatory for automotive production and the latter acceptable for industrial or consumer use.
What is the thermal resistance of the SMA5J12HE3/61?
The SMA5J12HE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard JEDEC test conditions and directly impacts sustained surge capability: at 500 W peak power, junction temperature rise is limited to ~40,000 °C without derating - hence the need for proper PCB copper area and airflow to maintain safe operation below the 150 °C TJ max limit of the SMA5J12HE3/61.
Does the SMA5J12HE3/61 have polarity marking, and how is it oriented?
Yes, the SMA5J12HE3/61 is unidirectional and features a visible cathode band on the package body - consistent with DO-214AC (SMA) standard orientation. The banded end is the cathode and must be connected toward the line being protected (e.g., 12 V rail), while the anode connects to ground or return. This polarity ensures correct blocking behavior during normal operation and effective clamping during positive transients - misorientation would prevent proper protection and may cause catastrophic failure of the SMA5J12HE3/61.
SMA5J12HE3/61 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J12HE3/61 FAQ
1.How can I place an order for SMA5J12HE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J12HE3/61 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 SMA5J12HE3/61 reliable?
The price and inventory of SMA5J12HE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J12HE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J12HE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J12HE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J12HE3/61?
SMA5J12HE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J12HE3/61 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 SMA5J12HE3/61?
For technical support, including SMA5J12HE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J12HE3/61 requirements.
6.How does Aetrix verify that SMA5J12HE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J12HE3/61 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 SMA5J12HE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J12HE3/61?
All SMA5J12HE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J12HE3/61, 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 SMA5J12HE3/61 part is unused and in its original packaging.
Return procedure for SMA5J12HE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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