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Diodes Incorporated SMAJ11A-13-F
- Part No.:
- SMAJ11A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11A-13-F.pdf
- Description:
- TVS DIODE 11VWM 18.2VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,819
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Product details
Overview
SMAJ11A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal interfaces. It features a 11V reverse standoff voltage (VRWM), 12.2–13.5V breakdown voltage (VBR) at 1mA, 18.2V max clamping voltage (VC) at 22A peak pulse current, and SMA package with cathode band polarity marking.
For engineers reviewing the SMAJ11A-13-F datasheet, SMAJ11A-13-F pinout, SMAJ11A-13-F application, or SMAJ11A-13-F equivalent, key selection criteria include clamping performance under 8.3ms surge, unidirectional polarity requirement, IEC 61000-4-2/4-5 compliance readiness, thermal derating above +25°C, and compatibility with automated SMT assembly on FR-4 PCBs.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered by transient overvoltage events exceeding its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<5µA at VRWM), while the unidirectional configuration provides forward conduction path only during negative transients relative to cathode.
The device responds within <1.0ps to ESD or lightning-induced surges and sustains 400W non-repetitive peak pulse power (PPK) under standardized 10/1000µs waveform conditions. Thermal performance is defined by -55°C to +150°C operating junction range and 1.0W steady-state dissipation at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Supports IEC 61000-4-5 Level 4 surge immunity (4kV line-to-ground) without failure |
| Clamping Voltage VC | 18.2V @ IPP = 22A - Limits downstream IC voltage stress during 8.3ms half-sine surge |
| Breakdown Voltage VBR | 12.2–13.5V @ IT = 1mA - Tight tolerance enables precise overvoltage trip point setting |
| Reverse Standoff VRWM | 11V - Maximum continuous DC operating voltage before leakage exceeds 5µA |
| Package | SMA (DO-214AC) - Standardized 2-pin SMT footprint compatible with IPC-7351B land pattern |
| Operating Temperature | -55°C to +150°C - Qualified for automotive under-hood and industrial control environments |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band marking for polarity identification, 0.064g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (during positive surge) | Connected to protected line; conducts when voltage exceeds VBR in reverse bias |
| Cathode | Reference node / ground return | Marked with band; ties to system ground or lower-potential rail for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Enables single-device protection against high-energy surges without cascaded staging |
| Glass Passivated Die | Ensures long-term VBR stability and low parameter drift across temperature and life cycle |
| Fast Response Time | <1.0ps reaction to ESD events per IEC 61000-4-2, minimizing voltage overshoot |
| RoHS & Halogen-Free | Meets EU RoHS 3 (2015/863/EU) and "Green" definition: Br+Cl <1500ppm, Sb <1000ppm |
| Moisture Sensitivity Level | MSL 1 per J-STD-020 - No floor life limitation; safe for standard reflow without baking |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 12V CAN bus transceivers and LIN interface lines against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between signal line and chassis ground to limit transient voltage to ≤18.2V. Use Value: Prevents latch-up or permanent damage to transceiver ICs during 100V/50ms load dump events. | Use Scenario: Input protection for microcontroller GPIOs monitoring door lock actuators and window lift switches. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 5V/3.3V supply rails feeding sensor interface circuitry. Use Value: Maintains MCU reset integrity and avoids brown-out resets during battery connection transients. |
| Telecom Power Feeds | Medical Diagnostic Equipment |
Use Scenario: Surge suppression on 48V PoE-powered Ethernet ports exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage TVS on DC input side of isolated DC/DC converter, upstream of filter capacitors. Use Value: Absorbs up to 400W surge energy before secondary protection triggers, reducing stress on downstream components. | Use Scenario: ESD protection for analog front-end inputs of patient monitoring devices (ECG, SpO₂). IC Role / Device Role / Timing Role: Low-capacitance (<50pF) unidirectional clamp on signal path to ADC input stage. Use Value: Preserves signal fidelity while meeting IEC 61000-4-2 ±8kV contact discharge requirements. |
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) | Same VRWM (11V), identical SMA package, but 18.5V VC @ 22A (vs. 18.2V) | Marginally higher clamping increases risk of downstream overvoltage in tight-margin designs | Select if Vishay supply chain alignment required; verify VC margin against protected IC abs max ratings |
| 1.5SMC11A (ON Semiconductor) | Higher PPK (1500W), larger SMC package (DO-214AB), 18.2V VC @ 82.5A | Overqualified for low-energy ESD; unsuitable for space-constrained layouts requiring SMA footprint | Choose only when surge energy exceeds 400W or board layout allows larger SMC footprint |
Compared with SMAJ11A-E3/5A, the SMAJ11A-13-F offers tighter clamping and better thermal response in SMA form factor; versus 1.5SMC11A, it trades peak power headroom for compactness and cost efficiency in mid-tier surge protection.
Availability
SMAJ11A-13-F is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and medical diagnostic equipment requiring stable component supply across extended production cycles.
Supply support for SMAJ11A-13-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SMAJ series belongs to Diodes' transient voltage suppression product line, engineered specifically for robust, cost-effective overvoltage protection in automotive, industrial, and communications systems where reliability under repetitive surge stress is critical.
FAQ
What is the maximum clamping voltage of SMAJ11A-13-F and under what test condition?
The maximum clamping voltage is 18.2V, measured at a peak pulse current (IPP) of 22A using an 8.3ms single half-sine waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (-55°C to +150°C) and defines the upper voltage limit imposed on protected circuits during surge events.
Is SMAJ11A-13-F suitable for bidirectional signal line protection?
No - SMAJ11A-13-F is unidirectional, indicated by the absence of "C" suffix. It clamps only reverse-biased transients (anode positive relative to cathode). For bidirectional protection (e.g., AC lines or differential buses), use SMAJ11CA-13-F, which has symmetrical clamping in both polarities and no cathode band marking.
Does this TVS diode require derating at elevated ambient temperatures?
Yes - peak pulse power must be linearly derated above +25°C ambient, following the curve in Figure 1 of DS19005. At +85°C, rated PPK drops to ~70% (280W); at +125°C, it falls to ~40% (160W). Steady-state power dissipation is also derated above +75°C lead temperature per Figure 6.
Can SMAJ11A-13-F be used in automotive AEC-Q200 qualified designs?
No - the standard SMAJ11A-13-F is not AEC-Q200 qualified. Diodes offers a separate automotive-grade variant, SMAJ11AQ-13-F, which undergoes additional stress testing, PPAP documentation, and is manufactured in IATF 16949-certified facilities. Use only the "Q" suffix part for automotive safety-critical applications.
SMAJ11A-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 22A
- Power - Peak Pulse:
- 400W
- 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:
- SMA
SMAJ11A-13-F FAQ
1.How can I place an order for SMAJ11A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11A-13-F 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 SMAJ11A-13-F reliable?
The price and inventory of SMAJ11A-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ11A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ11A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11A-13-F?
SMAJ11A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11A-13-F 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 SMAJ11A-13-F?
For technical support, including SMAJ11A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11A-13-F requirements.
6.How does Aetrix verify that SMAJ11A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ11A-13-F 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 SMAJ11A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ11A-13-F?
All SMAJ11A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11A-13-F, 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 SMAJ11A-13-F part is unused and in its original packaging.
Return procedure for SMAJ11A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ11A-13-F Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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