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Microchip Technology SMAJ11CAE3/TR13
- Part No.:
- SMAJ11CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11CAE3/TR13.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,878
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Product details
Overview
SMAJ11CAE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for robust ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. It features a 11 V reverse standoff voltage (VWM), 12.2 V minimum breakdown voltage (VBR), 20.1 V maximum clamping voltage (VC) at 24.9 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in telecom power interfaces, industrial I/O modules, and automotive body control units.
For engineers reviewing the SMAJ11CAE3/TR13 datasheet, SMAJ11CAE3/TR13 pinout, SMAJ11CAE3/TR13 application, or SMAJ11CAE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, RoHS-compliant matte-tin plating, DO-214AC package compatibility, and IEC61000-4-2/4-4/4-5 compliance for system-level EMC hardening.
Technical Context
This TVS operates as a voltage-clamped shunt protector with symmetrical avalanche breakdown in both polarities, enabling suppression of positive and negative transients without polarity dependency. Its <100 ps theoretical response time (unidirectional) and <5 ns for bidirectional variants ensures sub-nanosecond reaction to fast-rising ESD events per IEC61000-4-2 Level 4 (±15 kV contact).
Designed for surface-mount integration on FR4 PCBs with recommended footprint (1.70–2.26 mm A dimension), it delivers 15 °C/W junction-to-lead thermal resistance and supports steady-state dissipation of 1.56 W at 25 °C ambient - validated under MIL-PRF-19500 screening options when prefixed with MX.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| VBR min | 12.2 V @ 1 mA - Minimum voltage at which avalanche breakdown initiates reliably. |
| VC max | 20.1 V @ 24.9 A - Clamped voltage seen by protected circuit during 10/1000 µs surge. |
| PPP | 500 W - Peak transient power handling capacity under standardized surge waveform. |
| IPP | 24.9 A - Corresponding peak current at VC = 20.1 V, defining surge current margin. |
| ID max | 1 µA @ VWM - Leakage current level ensuring minimal standby power loss and signal integrity. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with C-bend leads and 0.064 g mass. |
Pinout & Package
DO-214AC (SMA) package with two terminals: symmetrical bidirectional construction means no anode/cathode distinction; polarity band omitted per specification for CA-suffix devices. Leads feature RoHS-compliant annealed matte-tin plating, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Surge Current Path | Both terminals serve identical bidirectional clamping paths to ground or rail; no directional bias required in layout. |
| Case / Body | Thermal Conductor | Transfer-molded UL94V-0 epoxy body provides mechanical stability and contributes to 15 °C/W junction-to-lead thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| IEC61000-4-5 Compliance | Validated for secondary lightning protection up to Class 4 (42 Ω source) with VWM ≤ 12 V. |
| RoHS Compliant Plating | Matte-tin termination meets lead-free assembly requirements and ensures reliable reflow solderability. |
| Fast Response Time | <5 ns turn-on for bidirectional mode ensures effective suppression of ESD transients >1 kV/ns rise rate. |
| Moisture Sensitivity Level | MSL Level 1 - No dry-pack or baking required prior to SMT assembly. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input/output channels in programmable logic controllers exposed to inductive switching noise and field wiring surges. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and chassis ground to clamp transients before reaching isolation amplifiers or microcontroller GPIOs. Use Value: Limits induced voltage spikes to ≤20.1 V during 24.9 A surges, preventing latch-up or permanent damage to 3.3 V/5 V interface ICs. | Use Scenario: LIN bus or sensor supply lines in door modules subject to load dump and ESD from human contact. IC Role / Device Role / Timing Role: Bidirectional clamping element across VBAT-to-ground or LIN signal pair to absorb ±15 kV ESD and 100 V/10 ms load dump overshoot. Use Value: Maintains signal integrity under IEC61000-4-2 Level 4 and ISO 16750-2 load dump stress without requiring additional series impedance. |
| Telecom Power Interface | Medical Equipment Signal Lines |
Use Scenario: -48 V DC power feed to remote radio units where lightning-induced surges propagate via long cable runs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input stage upstream of DC/DC converters and hot-swap controllers. Use Value: Withstands 500 W surges while holding clamped voltage below 20.1 V, preserving converter enable thresholds and MOSFET gate oxide integrity. | Use Scenario: Analog sensor inputs (e.g., temperature, pressure) in patient-connected devices requiring low-leakage, high-isolation protection. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional TVS placed directly at connector to suppress ESD without distorting mV-level signals. Use Value: 1 µA max leakage at 11 V standoff ensures negligible offset error in precision instrumentation front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11CA | No "e3" RoHS suffix; SnPb plating instead of matte-tin; otherwise identical electrical specs and DO-214AC package. | Not suitable for lead-free manufacturing; requires Pb-based solder process and fails RoHS compliance reporting. | Select SMAJ11CA only for legacy repair or non-RoHS exempt programs where SnPb assembly is mandated. |
| SMBJ11CAE3 | Same VWM, VBR, VC, but 600 W PPP rating and SMB (DO-214AA) package with larger thermal mass and higher IPP (29.8 A). | Better surge margin in high-energy environments; requires larger PCB footprint and different pad layout. | Choose SMBJ11CAE3 when system-level testing reveals marginal margin with 500 W rating or when thermal derating above 75 °C is critical. |
Compared with SMAJ11CA and SMBJ11CAE3, SMAJ11CAE3/TR13 offers optimal balance of RoHS compliance, standard DO-214AC footprint, and verified 500 W surge capability - making it ideal for cost-sensitive, space-constrained designs requiring full IEC61000-4-x certification without layout revision.
Availability
SMAJ11CAE3/TR13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom power interfaces requiring stable component supply and full traceability through tape-and-reel delivery.
Supply support for SMAJ11CAE3/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 components for aerospace, defense, and industrial markets.
The SMAJ series was developed specifically for surface-mount transient suppression in harsh electromagnetic environments - emphasizing fast response, repeatable clamping, and qualification to MIL-PRF-19500 and IEC standards.
FAQ
What does the "CA" suffix indicate in SMAJ11CAE3/TR13?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ11CAE3/TR13 provides symmetrical clamping for both positive and negative transients without polarity sensitivity. This differs from unidirectional "A" variants (e.g., SMAJ11AE3/TR13), which require correct anode-cathode orientation and only clamp in one direction. The CA version omits the cathode band marking per specification.
Is SMAJ11CAE3/TR13 compatible with lead-free reflow soldering processes?
Yes, SMAJ11CAE3/TR13 uses RoHS-compliant annealed matte-tin plating on its C-bend leads and is rated for solder temperatures up to 260 °C for 10 seconds - fully compliant with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity and standard lead-free reflow profiles. No pre-baking is required due to MSL Level 1 classification.
What IEC standards does SMAJ11CAE3/TR13 meet for surge protection?
SMAJ11CAE3/TR13 is specified to meet IEC61000-4-2 (ESD immunity up to ±15 kV contact), IEC61000-4-4 (EFT/burst immunity), and IEC61000-4-5 (surge immunity) for secondary lightning effects. Per the datasheet, it qualifies for Class 4 (42 Ω source) up to VWM = 12 V - confirming full compliance for SMAJ11CAE3/TR13 at its 11 V standoff rating.
How does the clamping voltage of SMAJ11CAE3/TR13 affect protected circuit design?
The maximum clamping voltage of SMAJ11CAE3/TR13 is 20.1 V at 24.9 A - this defines the worst-case overvoltage imposed on downstream components during a full-rated surge. Designers must ensure all protected ICs (e.g., microcontrollers, transceivers) have absolute maximum ratings exceeding 20.1 V, and that series impedance (e.g., current-limiting resistors) is minimized to avoid voltage doubling during transient events.
Can SMAJ11CAE3/TR13 be used in place of a unidirectional TVS like SMAJ11AE3/TR13?
No - SMAJ11CAE3/TR13 is not a drop-in replacement for unidirectional variants. While both share identical VWM, VBR, and VC values, the bidirectional CA construction lacks polarity marking and conducts in both directions, potentially causing unintended current paths in DC-biased circuits. Unidirectional use requires explicit anode-cathode orientation and blocking of reverse leakage, which SMAJ11CAE3/TR13 does not provide.
SMAJ11CAE3/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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 27.4A
- 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)
SMAJ11CAE3/TR13 FAQ
1.How can I place an order for SMAJ11CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11CAE3/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 SMAJ11CAE3/TR13 reliable?
The price and inventory of SMAJ11CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ11CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ11CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11CAE3/TR13?
SMAJ11CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11CAE3/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 SMAJ11CAE3/TR13?
For technical support, including SMAJ11CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ11CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ11CAE3/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 SMAJ11CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ11CAE3/TR13?
All SMAJ11CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11CAE3/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 SMAJ11CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ11CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ11CAE3/TR13 Tags
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