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Microchip Technology SMAJ22CE3/TR13
- Part No.:
- SMAJ22CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ22CE3/TR13.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,588
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Product details
Overview
SMAJ22CE3/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 22 V reverse standoff voltage (VWM), 24.4 V minimum breakdown voltage (VBR), 39.4 V maximum clamping voltage (VC) at 12.7 A peak pulse current (IPP), and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial I/O, telecom interfaces, and automotive body electronics.
For engineers reviewing the SMAJ22CE3/TR13 datasheet, SMAJ22CE3/TR13 pinout, SMAJ22CE3/TR13 application, or SMAJ22CE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, RoHS-compliant matte-tin plating, DO-214AC package compatibility, IEC61000-4-2/4-4/4-5 compliance, and tape-and-reel packaging for automated assembly.
Technical Context
The SMAJ22CE3/TR13 implements a silicon avalanche diode structure optimized for sub-nanosecond response to transients, with <5 ns clamping latency for bidirectional events. Its symmetrical breakdown behavior enables protection of AC-coupled or floating lines without polarity constraints.
Thermal design relies on low junction-to-lead thermal resistance (15 °C/W), enabling sustained 5 W steady-state dissipation at 75 °C lead temperature when mounted on FR4 with recommended footprint. Moisture sensitivity level is IPC/JEDEC Level 1 - no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min | 24.4 V @ 1 mA - guaranteed avalanche initiation threshold under specified test current |
| VC @ IPP | 39.4 V @ 12.7 A - clamped voltage during 10/1000 µs surge, defining protected circuit voltage ceiling |
| PPP | 500 W - peak transient power handling capacity, critical for IEC61000-4-5 Class 4 lightning surges |
| IPP | 12.7 A - maximum non-destructive surge current for 10/1000 µs waveform |
| ID @ VWM | 1 µA - leakage current at rated standoff, ensuring minimal power loss in standby |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with wide leads for thermal and mechanical reliability |
Pinout & Package
DO-214AC (SMA) package with symmetrical dual-terminal construction; cathode band omitted per bidirectional configuration per Microsemi specification. Leads feature RoHS-compliant annealed matte-tin plating, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking; either terminal serves as anode or cathode depending on transient polarity |
| Case / Body | Non-electrical thermal path | Transfer-molded UL94V-0 epoxy body provides mechanical integrity and thermal conduction to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating circuits without external polarity management |
| IEC61000-4-5 compliance | Validated for secondary lightning surges up to Class 4 (42 Ω source) with 22 V VWM rating |
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-020B moisture level 1 |
| Tape-and-reel packaging | TR13 variant supplies 2500 units per 13-inch reel per EIA-481-1-A standard for SMT line compatibility |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24 V CAN/LIN bus transceivers and analog sensor inputs from load dump and ESD events in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail and signal lines to clamp fast transients before they reach sensitive interface ICs. Use Value: Limits voltage excursion to ≤39.4 V during 12.7 A surges, preserving signal integrity and preventing latch-up in 24 V-rated transceivers. | Use Scenario: Safeguarding microcontroller GPIOs and LIN slave nodes against battery reverse connection and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply input and LIN data line, operating symmetrically for positive/negative transients. Use Value: Withstands 500 W surges per 10/1000 µs while maintaining <1 µA leakage, minimizing quiescent current impact on battery-powered modules. |
| Telecom Power Input | Medical Equipment Data Port |
Use Scenario: Shielding PoE-powered Ethernet switch ports from induced surges and lightning-induced common-mode transients on 48 V DC input rails. IC Role / Device Role / Timing Role: Front-end TVS on primary DC input stage, coordinated with upstream fuse and downstream DC-DC converter. Use Value: Clamps 48 V rail to 39.4 V within <5 ns, preventing damage to DC-DC controller ICs rated for 40 V absolute maximum. | Use Scenario: Securing USB and RS-232 ports on diagnostic imaging devices against ESD per IEC61000-4-2 Level 4 (8 kV contact). IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on data lines, placed adjacent to connector to minimize trace inductance. Use Value: Delivers <5 ns response and 39.4 V clamping to meet medical EMC immunity requirements without distorting high-speed serial waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22AHE3/TR13 | Unidirectional; 24.4 V VBR, 35.5 V VC @ 14.1 A; same DO-214AC package | Requires explicit polarity assignment; unsuitable for AC or floating lines | Select only when protecting DC rails with known polarity and lower clamping voltage is prioritized |
| SMBJ22CE3/TR13 | Same bidirectional function but SMB (DO-214AA) package; 39.4 V VC @ 12.7 A; 600 W rating | Higher power rating but larger footprint; not drop-in compatible due to different pad layout | Choose when higher surge margin is needed and PCB layout allows SMB footprint revision |
Compared with SMAJ22CE3/TR13, the unidirectional SMAJ22AHE3/TR13 offers tighter clamping but requires polarity-aware placement, while the SMBJ22CE3/TR13 delivers +20% peak power in a physically incompatible package - making SMAJ22CE3/TR13 optimal for space-constrained 500 W bidirectional protection with standard SMA layout.
Availability
SMAJ22CE3/TR13 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power inputs requiring stable component supply, full RoHS compliance, and IEC61000-4-5 Class 4 surge resilience.
Supply support for SMAJ22CE3/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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The SMAJ series was engineered specifically for surface-mount transient suppression in harsh environments, balancing 500 W surge capability, sub-5 ns response, and DO-214AC manufacturability for automotive and industrial power rail protection.
FAQ
What does the "C" suffix in SMAJ22CE3/TR13 indicate?
The "C" suffix in SMAJ22CE3/TR13 denotes a bidirectional configuration - meaning the device clamps transients of either polarity symmetrically across its two terminals. This eliminates the need for polarity-aware placement on PCBs and supports protection of AC-coupled, differential, or floating signal paths where voltage reversal may occur.
Is SMAJ22CE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ22CE3/TR13 is validated for secondary lightning surge protection per IEC61000-4-5 with 42 Ω source impedance up to Class 4 (VWM ≤ 12 V) and Class 3 (VWM ≤ 24 V). Its 22 V VWM and 39.4 V VC ensure safe clamping during 12.7 A 10/1000 µs surges, meeting system-level immunity requirements in industrial and automotive applications.
What is the thermal performance of SMAJ22CE3/TR13 on a standard FR4 board?
SMAJ22CE3/TR13 achieves 15 °C/W junction-to-lead thermal resistance when mounted on FR4 with the recommended footprint. At 75 °C lead temperature, it sustains 5 W steady-state power dissipation; at 25 °C ambient, derated to 1.56 W - enabling reliable operation in thermally constrained enclosures without forced cooling.
Does SMAJ22CE3/TR13 require moisture preconditioning before reflow?
No, SMAJ22CE3/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored indefinitely at ≤30 °C/60% RH without dry-packaging or baking. The device supports standard lead-free reflow profiles up to 260 °C for 10 seconds, with no moisture-related popcorning risk.
How does the "TR13" suffix affect packaging and assembly of SMAJ22CE3/TR13?
The "TR13" suffix indicates tape-and-reel packaging per EIA-481-1-A standard: 2500 units per 13-inch reel, 12 mm carrier tape width. This format ensures compatibility with high-speed pick-and-place equipment, reduces manual handling errors, and supports JIT manufacturing - all while maintaining full traceability and RoHS compliance throughout the SMAJ22CE3/TR13 supply chain.
SMAJ22CE3/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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 12.7A
- 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)
SMAJ22CE3/TR13 FAQ
1.How can I place an order for SMAJ22CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ22CE3/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 SMAJ22CE3/TR13 reliable?
The price and inventory of SMAJ22CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ22CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ22CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ22CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ22CE3/TR13?
SMAJ22CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ22CE3/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 SMAJ22CE3/TR13?
For technical support, including SMAJ22CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ22CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ22CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ22CE3/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 SMAJ22CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ22CE3/TR13?
All SMAJ22CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ22CE3/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 SMAJ22CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ22CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ22CE3/TR13 Tags
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