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Diodes Incorporated SMAJ75A-13-F
- Part No.:
- SMAJ75A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ75A-13-F.pdf
- Description:
- TVS DIODE 75VWM 121VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:9,475
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Product details
Overview
SMAJ75A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with 75V reverse standoff voltage, 83.3V minimum breakdown voltage, 121V maximum clamping voltage at 3.3A peak pulse current, and SMA package. It protects DC power rails and signal lines in industrial power supplies, automotive ECUs, and telecom interfaces against ESD and lightning-induced surges.
For engineers reviewing the SMAJ75A-13-F datasheet, SMAJ75A-13-F pinout, SMAJ75A-13-F application, or SMAJ75A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under 8.3ms half-sine waveform, thermal derating above +25°C ambient, and compatibility with automated SMT reflow profiles for SMA packages.
Technical Context
This TVS diode operates as a shunt-clamping device triggered by overvoltage events exceeding its reverse standoff voltage (75V), entering avalanche conduction at ≥83.3V to limit transient energy. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<100µA at VRWM).
Designed for single-pulse surge suppression per IEC 61000-4-5 (10/1000µs waveform) and ESD immunity per IEC 61000-4-2 (±30kV contact), it delivers 400W peak pulse power with fast response time (<1.0ps) and maintains operation across –55°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms half-sine surge without failure under defined thermal conditions |
| Reverse Standoff Voltage | 75V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage | 83.3–92.1V - guaranteed avalanche onset range at 1.0mA test current, defining turn-on threshold |
| Clamping Voltage | 121V at 3.3A IPP - maximum voltage seen by protected circuit during specified 8.3ms surge |
| Peak Pulse Current | 3.3A - maximum non-repetitive surge current the device can safely clamp at rated VC |
| Leakage Current | ≤100µA at 75V - ensures minimal power loss and signal integrity in standby operation |
| Package | SMA - industry-standard surface-mount outline (4.00–4.60mm length) compatible with JEDEC MS-013 |
Pinout & Package
Two-terminal unidirectional TVS diode in SMA package. Cathode band denotes terminal polarity; anode connects to ground or low-impedance return path, cathode to protected line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-impedance return; completes clamping path during transient |
| Cathode | Protected line terminal | Connected to line being safeguarded (e.g., 75V rail); conducts avalanche current to ground when overvoltage occurs |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 400W peak pulse rating | Supports robust protection against IEC 61000-4-5 Level 3 (1kV/2Ω) and Level 4 (2kV/2Ω) surges |
| RoHS-compliant & halogen-free | Meets EU RoHS 3 (2015/863/EU) and green manufacturing requirements for automotive and industrial use |
| SMA package with J-STD-020 Level 1 moisture sensitivity | Enables standard reflow assembly without pre-bake; compatible with high-volume SMT production |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 75V auxiliary power rail in programmable logic controller (PLC) power distribution unit exposed to load dump and inductive switching transients. IC Role / Device Role: Shunt clamping TVS placed between rail and chassis ground to divert surge energy away from downstream DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤121V, preserving 100V-rated input capacitors and preventing latch-up in 3.3V/5V logic supervisors. |
Use Scenario: LIN bus line in BCM connected to door module, subject to ESD events and battery voltage spikes during jump-start. IC Role / Device Role: Unidirectional TVS on LIN TX/RX line referenced to vehicle ground, absorbing ±30kV ESD and 12V–14V supply transients. Use Value: Maintains <100µA leakage at 12V nominal, ensuring LIN bus idle-state voltage stability while clamping to <121V during fault. |
| Telecom Base Station DC Feeds | Renewable Energy Inverter Control Board |
Use Scenario: -48V DC power feed to remote radio head (RRH) interface board, susceptible to induced surges from nearby lightning strikes. IC Role / Device Role: Primary surge protector on DC input stage, placed upstream of DC-DC isolation and monitoring circuitry. Use Value: Withstands 400W pulses without degradation, enabling compliance with ITU-T K.21 light industrial surge immunity requirements. |
Use Scenario: 75V intermediate bus in solar inverter control board powering gate drivers and isolated communication ICs. IC Role / Device Role: Secondary-level TVS on isolated 75V rail, guarding against coupling from high-dV/dt IGBT switching noise. Use Value: Fast <1ps response prevents voltage overshoot from propagating to sensitive analog sensing circuits and PWM controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75A-E3/5A (Vishay) | Identical 75V VRWM, 121V VC @ 3.3A, but rated for 1.5W steady-state power vs. 1.0W for Diodes part | Higher PM(AV) supports longer-duration surge exposure in thermally constrained layouts | Select when board-level thermal management limits junction temperature rise under sustained bias |
| 1.5SMC75A (ON Semiconductor) | Same electrical specs but in larger SMC package (7.11 × 6.22 mm); 10% higher clamping voltage (125V) at same IPP | Larger footprint enables higher thermal mass but requires PCB redesign; less suitable for space-constrained modules | Choose only if existing SMC footprint is fixed and 4V clamping margin increase is acceptable |
Compared with SMAJ75A-E3/5A and 1.5SMC75A, the SMAJ75A-13-F offers optimal balance of compact SMA footprint, precise 121V clamping ceiling, and AEC-Q200-aligned manufacturing-making it preferred for new designs targeting high-density industrial and automotive control boards.
Availability
SMAJ75A-13-F is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom infrastructure requiring stable component supply with full traceability and extended lifecycle support.
Supply support for SMAJ75A-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 portfolio, engineered specifically for high-reliability DC line protection in automotive, industrial, and communications equipment where compact size and repeatable clamping performance are critical.
FAQ
What is the maximum operating temperature for SMAJ75A-13-F?
The SMAJ75A-13-F has a junction temperature range of –55°C to +150°C and a storage temperature range of –55°C to +150°C. Its steady-state power dissipation is rated at 1.0W at TL = +75°C, with linear derating to zero at +150°C lead temperature, as shown in Figure 6 of DS19005 Rev. 19-2.
Is SMAJ75A-13-F suitable for bidirectional signal line protection?
No - SMAJ75A-13-F is unidirectional, indicated by the absence of "C" in its part number. Bidirectional versions (e.g., SMAJ75CA-13-F) are available separately and feature symmetric clamping in both polarities, required for AC-coupled or differential signal lines like RS-485 or CAN.
How does the clamping voltage change with different peak pulse currents?
Clamping voltage increases with peak pulse current per the device's dynamic V-I characteristic. At 1.0A IPP, VC ≈ 95V; at 3.3A IPP, VC = 121V max. This relationship is nonlinear and defined in the datasheet's VC vs. IPP curve (Figure 3), not extrapolated beyond tested points.
Does SMAJ75A-13-F meet AEC-Q200 qualification?
The standard SMAJ75A-13-F is not AEC-Q200 qualified. Diodes offers the automotive-grade variant SMAJ75AQ-13-F, which undergoes additional stress testing and is manufactured in IATF 16949-certified facilities - confirmed in the "Automotive-Compliant Part" note on page 1 of DS19005.
SMAJ75A-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 3.3A
- 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
SMAJ75A-13-F FAQ
1.How can I place an order for SMAJ75A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ75A-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 SMAJ75A-13-F reliable?
The price and inventory of SMAJ75A-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 SMAJ75A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ75A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ75A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ75A-13-F?
SMAJ75A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ75A-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 SMAJ75A-13-F?
For technical support, including SMAJ75A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ75A-13-F requirements.
6.How does Aetrix verify that SMAJ75A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ75A-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 SMAJ75A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ75A-13-F?
All SMAJ75A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ75A-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 SMAJ75A-13-F part is unused and in its original packaging.
Return procedure for SMAJ75A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ75A-13-F Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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