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Diodes Incorporated SMAJ75CA-13-F
- Part No.:
- SMAJ75CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ75CA-13-F.pdf
- Description:
- TVS DIODE 75VWM 121VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:63,182
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Product details
Overview
SMAJ75CA-13-F from Diodes Incorporated is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 75V reverse standoff voltage (VRWM), 83.3–92.1V breakdown voltage (VBR), 121V maximum clamping voltage (VC) at 3.3A peak pulse current (IPP), and operates across –55°C to +150°C. It is commonly deployed in automotive infotainment power inputs and industrial sensor interface circuits.
For engineers reviewing the SMAJ75CA-13-F datasheet, SMAJ75CA-13-F pinout, SMAJ75CA-13-F application, or SMAJ75CA-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, unidirectional vs. bidirectional polarity requirements, IEC 61000-4-2/4-5 compliance readiness, thermal derating above +25°C ambient, and compatibility with SMA footprint reflow profiles.
Technical Context
This TVS diode uses glass-passivated silicon junction construction to achieve fast response time (<1 ns) and stable clamping under repetitive surge events. Its bidirectional configuration enables symmetric suppression of both positive and negative transients without external polarity coordination.
The device complies with JEDEC Level 1 moisture sensitivity and supports lead-free reflow per MIL-STD-202 Method 208. Its 1.0W steady-state power dissipation at TL = +75°C and 40A peak forward surge rating (8.3ms half-sine) support use in high-energy surge environments such as 12V/24V automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Sustains single transient energy up to 400W for 10/1000µs waveform without failure |
| Reverse Standoff Voltage | 75V - Maximum continuous DC or RMS voltage before significant leakage; sets minimum operating rail margin |
| Breakdown Voltage | 83.3–92.1V @ IT = 1.0mA - Confirmed avalanche initiation range; ensures reliable turn-on before downstream IC damage |
| Clamping Voltage | 121V @ IPP = 3.3A - Maximum voltage seen by protected circuit during specified surge; defines safe voltage ceiling |
| Peak Pulse Current | 3.3A @ 10/1000µs - Peak surge current the device safely shunts while maintaining clamping performance |
| Operating Temperature | –55°C to +150°C - Validated junction temperature range for under-hood automotive and industrial control applications |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating; cathode band omitted due to bidirectional construction; weight ≈ 0.064g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | No polarity dependence - either terminal serves as input/output for ± surges; requires no orientation during placement |
| Case / Body | Thermal and mechanical interface | Non-conductive plastic housing; thermal path relies on PCB copper area; no electrical connection to package |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 400W peak pulse rating | Supports IEC 61000-4-5 Level 3 (1kV line-to-line, 2kV line-to-earth) surge immunity without derating |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900ppm Br, <900ppm Cl, <1000ppm Sb - suitable for green manufacturing |
| J-STD-020 Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT production flow |
Applications
| Automotive Infotainment Power Input | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting 12V power supply inputs of head units and display modules against load dump and jump-start transients. IC Role / Device Role: Primary bidirectional clamping element placed upstream of DC-DC converters and LDOs. Use Value: Limits voltage excursion to ≤121V during ISO 16750-2 12V load dump (100V, 400ms), preventing regulator latch-up or capacitor overvoltage. |
Use Scenario: Safeguarding CANH/CANL differential pair against ESD and inductive switching noise in factory automation nodes. IC Role / Device Role: Common-mode TVS across CANH–CANL and individually from each line to ground. Use Value: Maintains signal integrity below 121V clamping threshold while preserving <10pF total capacitance at 1MHz, avoiding bit error rate degradation. |
| Smart Meter AC/DC Power Supply | Outdoor PoE-Powered Camera |
Use Scenario: Secondary overvoltage protection on rectified DC bus after bridge rectifier in Class I metering designs. IC Role / Device Role: Back-to-back clamping device across bulk storage capacitor terminals. Use Value: Absorbs 400W surge energy from lightning-induced surges on AC mains input without thermal runaway (TJ ≤ +150°C). |
Use Scenario: Surge protection on 48V PoE (IEEE 802.3af/at) data+power pairs exposed to outdoor lightning coupling. IC Role / Device Role: Bidirectional clamp between PSE output lines and PD front-end rectification stage. Use Value: Withstands repeated 10/1000µs surges up to 3.3A while maintaining VRWM ≥75V to avoid false triggering during normal 57V PoE operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75CA-TP from Microchip | Identical VRWM (75V), VC (121V), and IPP (3.3A); same SMA package; AEC-Q101 qualified. | Required for automotive OEM programs mandating AEC-Q101 certification; not needed for industrial or consumer use. | Select when automotive PPAP documentation and IATF 16949 traceability are contractually required. |
| P6SMB75CA from ON Semiconductor | Same 75V VRWM and 121V VC, but 600W peak power rating and SMB package (larger footprint, higher thermal mass). | Preferred where board space allows larger package and higher surge margin (e.g., telecom power entry) is needed. | Choose for legacy designs using SMB footprints or where 600W headroom improves system-level surge test margin. |
Compared with SMAJ75CA-13-F, the Microchip alternative adds automotive qualification overhead without electrical benefit, while the ON Semiconductor part trades compactness for higher surge capacity and different thermal behavior-selection hinges on qualification needs and PCB layout constraints.
Availability
SMAJ75CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN networks, and smart meter power supplies requiring stable component supply, full RoHS 3 compliance, and J-STD-020 Level 1 handling.
Supply support for SMAJ75CA-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design and manufacturing facilities certified to IATF 16949 and ISO 9001 standards.
This device belongs to Diodes' SMAJ series of surface-mount TVS diodes, engineered specifically for high-reliability transient suppression in automotive, industrial, and communications infrastructure where compact size and repeatable clamping performance are critical.
FAQ
What is the polarity configuration of SMAJ75CA-13-F?
SMAJ75CA-13-F is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative voltage transients without requiring specific anode/cathode orientation on the PCB. The "C" suffix in the part number explicitly denotes bidirectional functionality, and no cathode band marking is present on the SMA package.
Does SMAJ75CA-13-F meet AEC-Q101 requirements?
No - SMAJ75CA-13-F is the standard industrial-grade version. Diodes offers a separate qualified variant, SMAJ75CAQ-13-F, which is AEC-Q101 qualified, PPAP-capable, and manufactured in IATF 16949-certified facilities. This distinction is documented in Diodes' Automotive Product Definitions portal and the SMAJ-Q series datasheet.
How does thermal derating affect its 400W rating?
The 400W peak pulse power rating applies only at TA = +25°C. Above that temperature, power capability decreases per the pulse derating curve in DS19005 Rev. 19–2: at +75°C ambient, peak pulse power drops to ~270W, and at +125°C, it falls to ~140W. Designers must apply this derating when estimating worst-case surge survivability in high-temperature enclosures.
Can SMAJ75CA-13-F be used in place of a unidirectional TVS like SMAJ75A-13-F?
Only if bidirectional protection is functionally required - e.g., for AC-coupled signals or floating power domains. Substituting SMAJ75CA-13-F for SMAJ75A-13-F introduces unnecessary conduction path during normal negative excursions and may increase leakage in DC-biased rails. The unidirectional version offers tighter low-voltage leakage (IR = 100µA max vs. 5µA for SMAJ75A), making it preferable for most DC power line applications.
SMAJ75CA-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:
- -
- Bidirectional Channels:
- 1
- 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
SMAJ75CA-13-F FAQ
1.How can I place an order for SMAJ75CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ75CA-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 SMAJ75CA-13-F reliable?
The price and inventory of SMAJ75CA-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 SMAJ75CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ75CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ75CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ75CA-13-F?
SMAJ75CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ75CA-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 SMAJ75CA-13-F?
For technical support, including SMAJ75CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ75CA-13-F requirements.
6.How does Aetrix verify that SMAJ75CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ75CA-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 SMAJ75CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ75CA-13-F?
All SMAJ75CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ75CA-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 SMAJ75CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ75CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ75CA-13-F Tags
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Diodes Incorporated
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