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Vishay General Semiconductor - Diodes Division SMA5J12CA-E3/61
- Part No.:
- SMA5J12CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J12CA-E3/61.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,279
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Product details
Overview
SMA5J12CA-E3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power 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 - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line conditioning.
For engineers reviewing the SMA5J12CA-E3/61 datasheet, SMA5J12CA-E3/61 pinout, SMA5J12CA-E3/61 application, or SMA5J12CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, low incremental surge resistance, AEC-Q101 qualification eligibility (via HE3 suffix), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with clamping action triggered when reverse or forward transients exceed VWM = 12 V. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ps), while low Rsurge minimizes voltage overshoot during 8/20 µs or 10/1000 µs surges.
Thermal performance is defined by RθJA = 80 °C/W (typ.) and RθJL = 25 °C/W (typ.), enabling reliable operation up to TJ = 150 °C. The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, and supports AEC-Q101 qualification when ordered with HE3/HM3 suffixes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 12 V rail protection. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Confirmed breakdown threshold range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 19.9 V at 25.1 A - Clamped voltage under 500 W 10/1000 µs surge; limits downstream IC stress to sub-20 V. |
| PPPM | 500 W - Peak pulse power handling capacity; sustains IEC 61000-4-5 Level 4 (4 kV) surges with margin. |
| IPPM | 25.1 A - Peak pulse current corresponding to 500 W at VC; used for PCB trace sizing and layout derating. |
| TJ max. | 150 °C - Maximum junction temperature; sets thermal design limit for ambient + power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | No designated anode/cathode; terminals interchangeable - enables single-component protection on AC or differential lines. |
| Case (body) | Thermal and mechanical interface | Plastic-molded body meets UL 94 V-0; requires 5.0 mm × 5.0 mm copper pad per terminal for rated PPPM. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage (<1 μA at VWM) over temperature and lifetime. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, inductive kickback). |
| MSL Level 1 compliance | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning. |
| AEC-Q101 qualification path | Available with HE3 suffix (e.g., SMA5J12CAHE3_A) for automotive-grade reliability validation. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load-dump and jump-start transients in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±20 V surges before signal conditioning circuitry. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (75 V/350 ms) with VC ≤ 19.9 V, preventing transceiver latch-up. |
Use Scenario: Safeguarding 24 V digital input modules against field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary surge suppression stage ahead of optocoupler input, rated for repetitive 1 kV/500 A surges. Use Value: Withstands >1000 surges at 50% IPPM due to low thermal resistance (RθJL = 25 °C/W), extending field service life. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Common-mode TVS across differential pair (A/B) and shield, referenced to chassis ground. Use Value: Symmetrical VBR ensures balanced clamping; 500 W rating handles IEC 61000-4-5 Combination Wave (10/700 µs) events. |
Use Scenario: Front-end ESD protection for USB 2.0 data lines (D+/D−) in smart home hubs exposed to human-body-model discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ < 100 pF at 0 V) placed directly at connector. Use Value: Clamps ±15 kV HBM ESD pulses within 1 ns while adding <0.5 pF parasitic capacitance - preserves signal rise time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA | Lower PPPM (400 W), higher VC (23.2 V at 17.3 A), same SMA package and VWM. | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy surges (e.g., IEC 61000-4-2 ESD only). | Select SMAJ12CA only when system-level surge testing does not exceed 400 W requirements. |
| SMBJ12CA | Same electrical specs but SMB (DO-214AA) package - 50% larger footprint, lower RθJA (60 °C/W), higher IPPM (32.9 A). | Preferred where board space allows and thermal margin is critical (e.g., high-ambient industrial enclosures). | Choose SMBJ12CA when thermal derating below 85 °C ambient is required or PCB layout permits larger pad area. |
Compared with SMA5J12CA-E3/61, SMAJ12CA offers reduced surge robustness but lower cost, while SMBJ12CA trades compactness for superior thermal performance and higher surge current handling - making SMA5J12CA-E3/61 optimal for space-constrained 500 W-rated designs.
Availability
SMA5J12CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line conditioning requiring stable component supply, RoHS compliance, and MSL Level 1 reflow readiness.
Supply support for SMA5J12CA-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, power density, and automotive-grade qualification.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments, targeting applications demanding AEC-Q101 readiness, low-profile SMT integration, and repeatable clamping performance under repetitive surge stress.
FAQ
What is the clamping voltage of the SMA5J12CA-E3/61 under maximum rated surge current?
The SMA5J12CA-E3/61 has a maximum clamping voltage (VC) of 19.9 V at 25.1 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and verified across production lots. The SMA5J12CA-E3/61 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), ensuring predictable protection behavior in automotive and industrial deployments.
Is the SMA5J12CA-E3/61 suitable for automotive applications?
The SMA5J12CA-E3/61 itself is commercial-grade (RoHS-compliant, MSL Level 1), but Vishay offers AEC-Q101 qualified versions under the HE3 and HM3 suffixes (e.g., SMA5J12CAHE3_A). For automotive use, specify the HE3 variant - it undergoes stress testing per AEC-Q101 including HTGB, HTRB, and temperature cycling. The SMA5J12CA-E3/61 shares identical electrical specs and package with the qualified version, enabling drop-in qualification upgrades.
How does the bidirectional configuration of SMA5J12CA-E3/61 affect PCB layout?
The SMA5J12CA-E3/61 has no polarity marking and symmetrical terminals, allowing direct placement across AC-coupled or differential signal pairs without orientation constraints. Layout requires two 5.0 mm × 5.0 mm copper pads (per Vishay's recommended footprint) to achieve rated 500 W pulse power. No keep-out zones or asymmetric routing are needed - simplifying layout for RS-485, CAN, or audio line protection where SMA5J12CA-E3/61 is commonly deployed.
What is the maximum leakage current of SMA5J12CA-E3/61 at its stand-off voltage?
At VWM = 12 V and TA = 25 °C, the SMA5J12CA-E3/61 exhibits a maximum reverse leakage current (ID) of 1.0 μA. This ultra-low leakage ensures minimal power loss in always-on circuits such as battery-backed sensors or 24 V industrial controllers. Leakage remains below 5 μA up to 85 °C ambient, preserving efficiency in thermally demanding environments where SMA5J12CA-E3/61 is routinely applied.
Can SMA5J12CA-E3/61 be used in place of unidirectional TVS diodes like SMA5J12A?
No - SMA5J12CA-E3/61 is strictly bidirectional and lacks cathode marking, while SMA5J12A is unidirectional with a band indicating cathode. Substituting them risks incorrect clamping on DC-biased lines: SMA5J12A conducts forward surge current (IFSM = 40 A), whereas SMA5J12CA-E3/61 blocks in both directions until VBR is exceeded. Use SMA5J12CA-E3/61 only where symmetrical transient suppression is required, such as AC signal paths or floating buses.
SMA5J12CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 25.1A
- 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)
SMA5J12CA-E3/61 FAQ
1.How can I place an order for SMA5J12CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J12CA-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 SMA5J12CA-E3/61 reliable?
The price and inventory of SMA5J12CA-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 SMA5J12CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J12CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J12CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J12CA-E3/61?
SMA5J12CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J12CA-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 SMA5J12CA-E3/61?
For technical support, including SMA5J12CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J12CA-E3/61 requirements.
6.How does Aetrix verify that SMA5J12CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J12CA-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 SMA5J12CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J12CA-E3/61?
All SMA5J12CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J12CA-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 SMA5J12CA-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J12CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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