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Microchip Technology SMAJ12CE3/TR13
- Part No.:
- SMAJ12CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ12CE3/TR13.pdf
- Description:
- TVS DIODE 12VWM 22VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,511
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Product details
Overview
SMAJ12CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for IEC 61000-4-2/4-4/4-5-compliant ESD, EFT, and secondary lightning protection. It features a 12 V reverse standoff voltage (VWM), 13.3 V minimum breakdown voltage (VBR), 22.0 V maximum clamping voltage (VC) at 22.7 A peak pulse current, and 500 W peak pulse power rating at 10/1000 µs waveform - deployed in DC power rails, USB interfaces, and industrial sensor inputs.
For engineers reviewing the SMAJ12CE3/TR13 datasheet, SMAJ12CE3/TR13 pinout, SMAJ12CE3/TR13 application, or SMAJ12CE3/TR13 equivalent, this device delivers verified bidirectional clamping performance with RoHS-compliant matte-tin plating, DO-214AC package compatibility, and Class 4 secondary lightning protection per IEC61000-4-5 (42 Ω source impedance).
Technical Context
The SMAJ12CE3/TR13 implements a silicon avalanche diode structure optimized for sub-nanosecond response (<5 ns clamping onset for bidirectional operation) and low dynamic impedance under surge conditions. Its symmetrical bidirectional construction enables equal clamping in both polarities without external polarity management.
It operates across –65 °C to +150 °C, supports 100% surge screening options (MA/MX prefixes), and maintains <1 μA standby leakage at 12 V VWM. Thermal resistance is 15 °C/W junction-to-lead when mounted per recommended FR4 footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before conduction begins; sets system rail compatibility. |
| VBR min @ IBR | 13.3 V @ 1 mA - Minimum avalanche initiation threshold; ensures reliable turn-on above normal operating voltage. |
| VC @ IPP | 22.0 V @ 22.7 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected ICs. |
| PPP | 500 W - Peak pulse power handling capability; determines survivability against standardized lightning surges. |
| IPP | 22.7 A - Peak current at rated clamping voltage; used to size PCB trace width and ground path inductance. |
| ID @ VWM | <1 μA - Reverse leakage at standoff voltage; critical for low-power sensor and battery-backed circuits. |
| Package | DO-214AC (SMAJ) - Standardized surface-mount outline with wide leads for thermal dissipation and mechanical robustness. |
Pinout & Package
DO-214AC (SMAJ) package: void-free thermosetting epoxy body (UL94V-0), C-bend leads with RoHS-compliant matte-tin plating, cathode unmarked (bidirectional), weight 0.064 g, moisture sensitivity level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking; terminals interchangeable; provides identical clamping in positive and negative transients. |
| Case / Body | Thermal and mechanical interface | Non-electrical; serves as primary heat sink path to PCB copper; requires full-surface solder pad per Microsemi layout spec. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| IEC61000-4-5 Class 4 compliance (42 Ω) | Validated for secondary lightning surges up to 22.7 A on 12 V systems - meets industrial control and building automation requirements. |
| RoHS-compliant "e3" suffix | Matte-tin plating per MIL-STD-750 Method 2026; supports lead-free reflow (260 °C/10 s) and eliminates Pb contamination risk. |
| Fast clamping response | <5 ns turn-on time for bidirectional mode - limits transient energy delivery to downstream CMOS/BiCMOS ICs. |
| Low standby leakage | <1 μA at 12 V - preserves battery life in always-on IoT sensors and avoids false triggering in high-impedance analog paths. |
Applications
| Industrial Sensor Interface | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: 4–20 mA current-loop sensor connected to PLC input with long field wiring exposed to induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair to clamp common-mode transients before signal conditioning amplifier. Use Value: Limits voltage excursion to ≤22.0 V during 1 kV/42 Ω IEC61000-4-5 surge, preventing op-amp latch-up and ADC saturation. |
Use Scenario: USB 2.0 host port exposed to ESD events from user plugging/unplugging cables. IC Role / Device Role / Timing Role: TVS placed on D+ and D− lines to shunt ESD energy per IEC61000-4-2 ±8 kV contact discharge. Use Value: Sub-5 ns response clamps transients below USB PHY damage threshold while maintaining <1 pF parasitic capacitance (per device half). |
| DC Power Rail Protection | RS-485 Transceiver Port |
Use Scenario: 12 V supply rail feeding microcontroller and peripherals in factory automation controller. IC Role / Device Role / Timing Role: TVS connected between VCC and GND to absorb inductive switching spikes from relay coils or motor drivers. Use Value: 500 W peak power rating sustains multiple 10/1000 µs surges without degradation; 12 V VWM avoids interference with nominal rail regulation. |
Use Scenario: RS-485 transceiver (e.g., MAX485) installed in outdoor kiosk with long twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional TVS applied across A/B differential lines to suppress common-mode surges per IEC61000-4-4 EFT. Use Value: Symmetrical clamping prevents data corruption during fast bursts; 22.0 V VC stays within RS-485 receiver common-mode range (±7 V to ±12 V). |
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 | Same electrical specs and DO-214AC package; lacks "e3" RoHS suffix and TR13 tape-and-reel packaging. | Non-RoHS assembly environments; manual or non-reflow production where lead-free compliance is not required. | Select SMAJ12CA only if RoHS exemption applies and tape-and-reel is unnecessary. |
| SMBJ12CA | Lower 600 W peak power rating; same VWM/VC but higher IPP (33.3 A); SMB package (DO-214AA) with smaller footprint and higher thermal resistance (20 °C/W). | Space-constrained designs accepting reduced surge margin; lower-cost alternatives where 600 W suffices. | Choose SMBJ12CA only if board area is critical and surge duty cycle is infrequent; verify thermal derating on FR4. |
Compared with SMAJ12CA and SMBJ12CA, SMAJ12CE3/TR13 uniquely combines RoHS compliance, industry-standard tape-and-reel delivery (750/reel), and validated 500 W surge capability in the widely adopted DO-214AC outline - making it optimal for volume industrial manufacturing requiring traceable, compliant components.
Availability
SMAJ12CE3/TR13 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB 2.0 data line protection, and DC power rail protection requiring stable component supply, RoHS compliance, and IEC61000-4-5 Class 4 surge immunity.
Supply support for SMAJ12CE3/TR13 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal solutions for aerospace, defense, and industrial markets.
The SMAJ series was engineered for ruggedized transient suppression in harsh electromagnetic environments - targeting industrial control, building automation, and transportation systems where ESD, EFT, and lightning-induced surges are routine.
FAQ
What does the "C" suffix in SMAJ12CE3/TR13 indicate?
The "C" suffix denotes bidirectional construction: SMAJ12CE3/TR13 provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional variants (e.g., SMAJ12A), it has no cathode band marking and is ideal for AC-coupled or floating signal lines where voltage polarity is undefined.
Is SMAJ12CE3/TR13 RoHS compliant and lead-free process compatible?
Yes - the "e3" suffix certifies RoHS compliance with annealed matte-tin plating. SMAJ12CE3/TR13 supports lead-free reflow soldering at 260 °C for 10 seconds per JEDEC J-STD-020, and its moisture sensitivity level is Level 1, eliminating dry-pack requirements prior to assembly.
What IEC standards does SMAJ12CE3/TR13 meet for surge protection?
SMAJ12CE3/TR13 is validated for IEC61000-4-2 (ESD ±8 kV contact), IEC61000-4-4 (EFT 4 kV burst), and IEC61000-4-5 (secondary lightning) with Class 4 rating using 42 Ω source impedance. Its 22.0 V clamping voltage at 22.7 A ensures protected circuits remain within safe operating limits during these standardized tests.
How does the DO-214AC package of SMAJ12CE3/TR13 aid thermal performance?
The DO-214AC (SMAJ) package features wide leads and a low-profile thermosetting epoxy body that provides 15 °C/W junction-to-lead thermal resistance. When mounted per Microsemi's recommended pad layout on 1 oz Cu FR4, it efficiently transfers surge energy into the PCB plane - critical for sustaining repeated 500 W transients without thermal runaway.
Can SMAJ12CE3/TR13 replace SMAJ12A in an existing design?
No - SMAJ12A is unidirectional with cathode band marking and asymmetric clamping behavior; SMAJ12CE3/TR13 is bidirectional with no polarity marking. Substitution requires circuit review: bidirectional use cases (e.g., differential lines) benefit, but unidirectional DC rails may experience unintended conduction. Always verify layout and signal topology before replacement.
SMAJ12CE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- 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:
- 22V
- Current - Peak Pulse (10/1000µs):
- 22.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ12CE3/TR13 FAQ
1.How can I place an order for SMAJ12CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ12CE3/TR13 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 SMAJ12CE3/TR13 reliable?
The price and inventory of SMAJ12CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ12CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ12CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ12CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ12CE3/TR13?
SMAJ12CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ12CE3/TR13 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 SMAJ12CE3/TR13?
For technical support, including SMAJ12CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ12CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ12CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ12CE3/TR13 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 SMAJ12CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ12CE3/TR13?
All SMAJ12CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ12CE3/TR13, 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 SMAJ12CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ12CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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