My Inquiry
My Account
Microchip Technology SMAJ11E3/TR13
- Part No.:
- SMAJ11E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11E3/TR13.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,749
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ11E3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for primary and secondary 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 - used in industrial power supplies and automotive body electronics.
For engineers reviewing the SMAJ11E3/TR13 datasheet, SMAJ11E3/TR13 pinout, SMAJ11E3/TR13 application, or SMAJ11E3/TR13 equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, IEC61000-4-5 Class 4 secondary lightning compliance (12 Ω source), RoHS-compliant matte-tin plating, and DO-214AC package thermal performance on FR4 with 15 °C/W junction-to-lead resistance.
Technical Context
This unidirectional TVS operates as a fast-acting shunt clamp, triggering when transient voltage exceeds its 12.2 V breakdown threshold at 1 mA test current. Its <100 ps theoretical response time enables effective suppression of ESD per IEC61000-4-2 (±8 kV contact) and EFT per IEC61000-4-4 (±2 kV).
It is rated for 500 W peak pulse power at 25 °C with 0.01% duty cycle, derates linearly above 25 °C per the published curve, and supports steady-state dissipation of 1.56 W at 25 °C ambient or 5 W at 75 °C lead temperature - requiring adherence to the specified DO-214AC pad layout for thermal reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 11 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets upper limit for protected circuit operating voltage. |
| VBR (Min) | 12.2 V @ 1 mA - Guaranteed breakdown onset; ensures reliable clamping before downstream IC damage thresholds. |
| VC @ IPP | 20.1 V @ 24.9 A - Clamped voltage during 10/1000 µs surge; must stay below protected device's absolute max rating. |
| PPP | 500 W - Peak surge energy handling capacity; defines survivability under standardized lightning-induced transients. |
| ID @ VWM | 1 µA - Leakage current at rated standoff; negligible loading on 11 V supply rail under normal operation. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with 1.70–2.26 mm body width; validated for automated reflow assembly. |
| Operating Temp | −65 °C to +150 °C - Enables use in under-hood automotive, industrial controls, and outdoor power equipment. |
Pinout & Package
DO-214AC (SMA) package: molded thermosetting epoxy case, void-free, UL94V-0 rated; C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating; cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path to ground | Connected to system ground plane; carries full 24.9 A transient current during clamping event. |
| Cathode | Protected line input | Connected to 11 V rail or signal line; voltage referenced to anode; marked by band on package body. |
Key Features
| Feature | Design Value |
|---|---|
| IEC61000-4-5 Class 4 compliance | Validated for secondary lightning surges with 12 Ω source impedance up to 11 V systems - meets stringent industrial port protection requirements. |
| RoHS-compliant "e3" suffix | Matte-tin plating per JEDEC J-STD-020B Level 1 moisture sensitivity - no dry pack required; compatible with standard Pb-free reflow profiles. |
| Fast response time | <100 ps theoretical turn-on - suppresses ESD events before propagation into sensitive CMOS/BiCMOS logic or analog front-ends. |
| Thermal resistance (RθJL) | 15 °C/W junction-to-lead - enables sustained 5 W power dissipation at TL = 75 °C with proper PCB copper pour and footprint. |
| Tape-and-reel packaging | TR13 suffix indicates 2500 units per 13-inch reel per EIA-481-1-A - optimized for high-volume SMT placement with 12 mm carrier tape. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 12 V battery-fed power rail in programmable logic controllers exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between 12 V rail and chassis ground to limit transients to ≤20.1 V. Use Value: Prevents latch-up or gate oxide rupture in microcontrollers and CAN transceivers during ISO 7637-2 Pulse 5a (load dump) events. | Use Scenario: LIN bus data line in door module subjected to ESD and cable discharge events. IC Role / Device Role / Timing Role: Signal-line TVS connected between LIN line and ground, leveraging low capacitance and fast response. Use Value: Maintains signal integrity with <1 µA leakage at 11 V while clamping ±8 kV ESD per IEC61000-4-2 without disrupting 19.2 kbps LIN timing. |
| Telecom DC Feeder Protection | Medical Equipment Power Entry |
Use Scenario: −48 V DC power feed in remote radio head enclosures subject to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional-capable family member (e.g., SMAJ11CA) used in pairs; this unidirectional variant applied where polarity is fixed. Use Value: Provides 500 W surge handling with 20.1 V clamping to protect DC-DC converters and PMICs meeting IEC61000-4-5 Class 2 (42 Ω source). | Use Scenario: AC/DC adapter output stage feeding isolated patient-connected monitoring circuits. IC Role / Device Role / Timing Role: Final-stage overvoltage clamp on regulated 12 V output, ensuring safety-critical voltage limits are never exceeded. Use Value: Meets MDD/IEC 60601-1 creepage/clearance requirements via low-leakage (1 µA) and UL94V-0 flammability-rated epoxy package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/5A (Vishay) | Identical VWM (11 V), VBR (12.2 V min), VC (20.1 V), PPP (500 W); same DO-214AC package and RoHS plating. | No functional difference; validated for same IEC61000-4-2/4-4/4-5 classes and thermal derating profile. | Select based on distributor availability and traceability requirements; both meet MIL-PRF-19500 JANTX screening option with MX prefix. |
| 1.5SMC11A (ON Semiconductor) | Slightly higher VC (20.8 V @ 24.2 A); identical PPP, VWM, and DO-214AC package; 1.5 kW rating applies only to shorter 10/100 µs waveform. | Marginally reduced clamping margin for 12 V systems near 20 V absolute max ratings; otherwise interchangeable in non-safety-critical designs. | Prefer SMAJ11E3/TR13 where tighter clamping (20.1 V) or Microsemi's avionics-grade MA-screening option is required. |
Compared with SMAJ11A-E3/5A, SMAJ11E3/TR13 offers identical electrical specs and qualification scope; versus 1.5SMC11A, it delivers 0.7 V lower clamping voltage - critical for protecting 12 V logic with narrow voltage margins - and maintains full 500 W rating across the industry-standard 10/1000 µs waveform.
Availability
SMAJ11E3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom DC feeder protection, and medical equipment power entry requiring stable component supply and long-term lifecycle continuity.
Supply support for SMAJ11E3/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 ICs, RF solutions, and discrete protection devices for aerospace, defense, and industrial markets.
The SMAJ series was engineered for robust, surface-mount transient suppression in harsh environments - targeting applications demanding IEC61000-4-5 compliance, extended temperature operation, and proven field reliability in power conversion and interface protection.
FAQ
What is the clamping voltage of SMAJ11E3/TR13 at its rated peak pulse current?
The SMAJ11E3/TR13 has a maximum clamping voltage (VC) of 20.1 V at 24.9 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is measured per Microsemi's MSC0270A datasheet and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 12 V system ICs rated for ≤20.5 V absolute maximum.
Is SMAJ11E3/TR13 unidirectional or bidirectional?
SMAJ11E3/TR13 is a unidirectional Transient Voltage Suppressor. Its part number lacks the "C" or "CA" suffix, confirming single-polarity operation with cathode band marking. It conducts only during positive transients on the cathode relative to anode - making it suitable for DC power rail protection where polarity is fixed, unlike bidirectional variants such as SMAJ11CA.
What package type does SMAJ11E3/TR13 use, and is it compatible with standard SMT assembly?
SMAJ11E3/TR13 uses the DO-214AC (SMA) surface-mount package with C-bend leads and RoHS-compliant matte-tin plating. It conforms to EIA-481-1-A tape-and-reel standards (TR13 = 2500 units/reel) and is qualified for standard Pb-free reflow profiles - including peak temperatures up to 260 °C for 10 seconds - with no moisture preconditioning required (IPC/JEDEC J-STD-020B Level 1).
Does SMAJ11E3/TR13 meet IEC61000-4-5 for lightning surge immunity?
Yes, SMAJ11E3/TR13 is certified for secondary lightning surge protection per IEC61000-4-5. With a 12 Ω source impedance, it supports Class 4 (up to 11 V systems); with 42 Ω source impedance, it qualifies for Class 1 through Class 4 depending on VWM. Its 500 W peak pulse power rating and 20.1 V clamping ensure compliance when implemented with proper PCB layout and grounding per Microsemi's recommended footprint.
What is the maximum steady-state power dissipation for SMAJ11E3/TR13 at room temperature?
At 25 °C ambient temperature (TA), SMAJ11E3/TR13 has a maximum steady-state power dissipation of 1.56 W when mounted on an FR4 PCB with 1 oz copper and Microsemi's recommended pad layout. This rating assumes natural convection cooling; derating is required above 25 °C per the published thermal derating curve, reaching 0 W at 150 °C ambient.
SMAJ11E3/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 24.9A
- 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)
SMAJ11E3/TR13 FAQ
1.How can I place an order for SMAJ11E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11E3/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 SMAJ11E3/TR13 reliable?
The price and inventory of SMAJ11E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ11E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ11E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11E3/TR13?
SMAJ11E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11E3/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 SMAJ11E3/TR13?
For technical support, including SMAJ11E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11E3/TR13 requirements.
6.How does Aetrix verify that SMAJ11E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ11E3/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 SMAJ11E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ11E3/TR13?
All SMAJ11E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11E3/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 SMAJ11E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ11E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ11E3/TR13 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
