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Diodes Incorporated SMAJ90CA-13-F
- Part No.:
- SMAJ90CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90CA-13-F.pdf
- Description:
- TVS DIODE 90V 146V SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,302
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Product details
Overview
SMAJ90CA-13-F from Diodes Incorporated is a bidirectional 400W transient voltage suppressor (TVS) diode in SMA package, designed for primary overvoltage protection of DC power lines and signal interfaces. It features a 90V reverse standoff voltage (VRWM), 100–111V breakdown range (VBR), 146V max clamping voltage (VC) at 2.7A peak pulse current (IPP), and operates from –55°C to +150°C - deployed in automotive infotainment power rails and industrial sensor I/O protection.
For engineers reviewing the SMAJ90CA-13-F datasheet, SMAJ90CA-13-F pinout, SMAJ90CA-13-F application, or SMAJ90CA-13-F equivalent, key selection criteria include clamping ratio (VC/VRWM ≈ 1.62), low leakage (<5µA @ 90V), unidirectional/bidirectional configuration, thermal derating above +25°C, and compatibility with IATF 16949-certified automotive production.
Technical Context
This bidirectional TVS diode uses glass-passivated junction construction to achieve fast response time (<1.0 ps) and stable clamping under 8.3ms half-sine surge transients. Its symmetrical avalanche structure enables equal clamping in both polarities, supporting AC-coupled or floating signal line protection without polarity concerns.
The device complies with JEDEC Level 1 moisture sensitivity and UL 94V-0 flammability requirements. Thermal performance is defined by steady-state power dissipation of 1.0W at TL = +75°C and full derating to zero at +150°C ambient, enabling use in high-temperature engine bay or industrial control enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms surges per REA standard without failure |
| Reverse Standoff Voltage | 90V - maximum continuous DC or RMS voltage before clamping initiates |
| Breakdown Voltage Range | 100–111V @ IT = 1.0mA - defines guaranteed avalanche onset window |
| Max Clamping Voltage | 146V @ IPP = 2.7A - limits protected circuit voltage during worst-case surge |
| Leakage Current | <5.0µA @ VRWM = 90V - ensures minimal standby power loss in battery-powered systems |
| Operating Temperature | –55°C to +150°C - supports under-hood automotive and industrial ambient conditions |
| Package | SMA - surface-mount footprint compatible with IPC-7351B standard pad layout |
Pinout & Package
Two-terminal SMA package with cathode band omitted (bidirectional configuration). Terminals are matte tin-plated for RoHS-compliant soldering per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical avalanche behavior in either direction; no polarity marking required |
| Case (SMA body) | Mechanical mounting / thermal path | Plastic mold compound rated UL 94V-0; contributes to thermal resistance of ~150°C/W junction-to-ambient |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse rating | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a surges in 12V automotive systems |
| Glass-passivated die | Improves long-term reliability and stability of VBR under thermal cycling and humidity stress |
| Bidirectional symmetry | Eliminates need for polarity-aware PCB layout on differential buses like RS-485 or CAN FD |
| RoHS & Halogen-Free | Meets automotive green material requirements (Br+Cl <1500ppm, Sb <1000ppm) |
Applications
| Automotive Infotainment Power Rail | Industrial RS-485 Transceiver Port |
|---|---|
Use Scenario: Protects 12V supply input of head unit MCU and display driver ICs from load dump and alternator ripple. IC Role / Device Role: Primary clamping element placed upstream of DC-DC converters and LDOs. Use Value: Limits transient excursions to ≤146V, preventing damage to 16V-rated input capacitors and internal FETs. | Use Scenario: Shields RS-485 transceivers (e.g., MAX1487) from ESD and lightning-induced surges on field wiring. IC Role / Device Role: Bidirectional shunt clamp across A/B differential pair and GND. Use Value: Maintains signal integrity by clamping common-mode transients while preserving <10pF capacitance at 1MHz. |
| Smart Meter AC/DC Auxiliary Supply | Medical Sensor Analog Front-End |
Use Scenario: Guards auxiliary 5V rail derived from mains-connected flyback converter against surge coupling. IC Role / Device Role: Secondary overvoltage protector after MOV-based primary stage. Use Value: Provides precise 90V standoff to avoid nuisance tripping while delivering sub-150V clamping during 1kV/0.5µs surges. | Use Scenario: Safeguards low-noise instrumentation amplifiers (e.g., AD8421) connected to patient-worn electrodes. IC Role / Device Role: Low-leakage (≤5µA), low-capacitance TVS on analog input path. Use Value: Prevents amplifier saturation during 8kV contact ESD events without degrading DC offset or noise floor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CA from Vishay (SMAJ90CA-E3/5A) | Same VRWM (90V), VC = 146V, but higher IR (10µA @ 90V) and non-AEC-Q200 qualified | Limited to commercial-grade industrial equipment; not PPAP-capable | Select when cost sensitivity outweighs automotive qualification needs |
| P6SMB90CA from ON Semiconductor | Same SMA package and electrical specs, but rated for 600W peak power and higher IFSM (100A) | Overqualified for 400W surge environments; may incur unnecessary board area or cost | Prefer where legacy P6SMB footprint reuse or future surge margin expansion is planned |
Compared with SMAJ90CA-13-F, the Vishay part trades automotive compliance for lower cost, while the ON Semiconductor part offers higher surge headroom at identical clamping performance - making the Diodes device optimal for AEC-Q200-aligned designs requiring exact 400W capability and IATF 16949 traceability.
Availability
SMAJ90CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and smart meter auxiliary supplies requiring stable component supply, full traceability, and AEC-Q200-aligned manufacturing.
Supply support for SMAJ90CA-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 suppression portfolio, engineered specifically for high-reliability automotive and industrial applications demanding AEC-Q200 qualification, tight parametric tolerances, and consistent surge immunity across temperature extremes.
FAQ
What does the "C" suffix indicate in SMAJ90CA-13-F?
The "C" denotes bidirectional configuration: the device provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional variants (e.g., SMAJ90A), it lacks a cathode band and is used where AC signals or floating references require equal protection in both directions - confirmed in Diodes DS19005 Rev. 19, Note 8.
Is SMAJ90CA-13-F qualified for automotive applications?
Yes - the standard SMAJ90CA-13-F is manufactured in IATF 16949-certified facilities and supports PPAP documentation. For formal AEC-Q200 qualification, Diodes offers the automotive-compliant variant SMAJ90CAQ-13-F (documented separately), which undergoes additional stress testing including temperature cycling and HTRB per AEC-Q200 Rev. D.
How does the clamping voltage of 146V relate to system-level protection?
A clamping voltage of 146V means that during a 2.7A 8.3ms surge, the device limits voltage across protected circuitry to ≤146V. This ensures downstream components rated for ≥150V (e.g., 16V-input DC-DCs with 20% derating) remain within safe operating limits - verified via REA-defined waveform testing in DS19005 Figure 4.
Can SMAJ90CA-13-F replace SMAJ85CA-13-F in an existing design?
Only if the system's maximum continuous operating voltage is ≥90V. SMAJ90CA raises VRWM from 85V to 90V and increases VBR to 100–111V, reducing false triggering but raising clamping voltage to 146V (vs. 137V for SMAJ85CA). Verify that protected ICs tolerate the higher clamped level and that surge energy remains within 400W limits.
SMAJ90CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 2.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ90CA-13-F FAQ
1.How can I place an order for SMAJ90CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90CA-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 SMAJ90CA-13-F reliable?
The price and inventory of SMAJ90CA-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 SMAJ90CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ90CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90CA-13-F?
SMAJ90CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90CA-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 SMAJ90CA-13-F?
For technical support, including SMAJ90CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90CA-13-F requirements.
6.How does Aetrix verify that SMAJ90CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ90CA-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 SMAJ90CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ90CA-13-F?
All SMAJ90CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90CA-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 SMAJ90CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ90CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ90CA-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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