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Diodes Incorporated SMAJ90CA-13
- Part No.:
- SMAJ90CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90CA-13.pdf
- Description:
- TVS DIODE 90VWM 146VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:9,347
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Product details
Overview
SMAJ90CA-13 from Diodes Incorporated is a bi-directional 400W surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 90V reverse standoff voltage (VRWM), 100–111V breakdown range (VBR), 146V maximum clamping voltage (VC) at 2.7A peak pulse current (IPP), and operates from –55°C to +150°C - used in industrial power supply input stages and automotive body control modules.
For engineers reviewing the SMAJ90CA-13 datasheet, SMAJ90CA-13 pinout, SMAJ90CA-13 application, or SMAJ90CA-13 equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC rating, unidirectional/bi-directional polarity requirement, 400W peak pulse power handling under 8.3ms surge, and SMA package thermal performance under sustained ambient conditions.
Technical Context
This bi-directional TVS diode uses glass-passivated junction construction to achieve fast response time (<1 ps) and stable clamping behavior during ESD or lightning-induced transients. Its symmetrical I-V characteristic enables protection of AC-coupled or floating signal paths without polarity concerns.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) standards when applied with appropriate PCB layout and series impedance. Clamping performance is specified at 1.0mA test current (IT) and validated under 8.3ms half-sine waveform per JEDEC method.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms surge events without failure; derates linearly above 25°C ambient. |
| Reverse Standoff Voltage | 90V - maximum continuous DC or RMS voltage before significant leakage; sets minimum operating rail margin. |
| Breakdown Voltage Range | 100–111V @ 1.0mA - defines onset of avalanche conduction; ensures reliable turn-on before downstream component damage. |
| Max Clamping Voltage | 146V @ 2.7A IPP - limits transient voltage seen by protected circuit; determines required voltage headroom for ICs. |
| Leakage Current | ≤5.0µA @ 90V - negligible standby power loss; avoids false triggering or battery drain in always-on systems. |
| Operating Temperature | –55°C to +150°C - supports under-hood automotive, industrial motor drives, and outdoor power equipment. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with UL 94V-0 flammability rating and moisture sensitivity level 1. Cathode band omitted due to bi-directional symmetry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bi-directional avalanche terminals | Interchangeable; forms symmetrical clamp path between any two points - no polarity orientation required on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Enables stable, low-leakage avalanche behavior across temperature and lifetime; eliminates passivation-related drift. |
| 400W peak pulse rating | Handles high-energy surges common in 24V/48V industrial buses and automotive load-dump events without degradation. |
| Bi-directional configuration | Protects AC signals, differential buses (e.g., RS-485), or floating grounds without external polarity management. |
| RoHS-compliant matte tin finish | Ensures solderability per MIL-STD-202 Method 208 and compatibility with lead-free reflow profiles. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protects 24V digital input channels against induced surges from relay coil flyback or nearby motor switching. IC Role / Device Role / Timing Role: Standoff-mode TVS placed between field input and optocoupler input, clamping transients before they reach isolation barrier. Use Value: 146V clamping ensures microcontroller GPIOs (rated ≤3.3V or 5V) remain undamaged even when upstream 24V rail spikes to >100V. | Use Scenario: Shields LIN bus transceiver pins from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Bi-directional clamp across LIN data line and ground, suppressing both positive and negative polarity surges. Use Value: Symmetrical clamping preserves signal integrity on bidirectional serial bus while meeting ISO 16750-2 pulse 5a requirements. |
| DC Power Supply Input Stage | RS-485 Transceiver Interface |
Use Scenario: Mounted at 48V telecom rectifier output to absorb switching noise and lightning-induced surges before DC-DC converters. IC Role / Device Role / Timing Role: Primary overvoltage clamp in front of bulk capacitance and upstream fuse; absorbs energy before it propagates into regulation stage. Use Value: 400W rating handles multi-cycle 10/1000µs surges up to 1kV without thermal runaway or parameter shift. | Use Scenario: Placed across A/B differential pair of isolated RS-485 transceivers in factory automation networks. IC Role / Device Role / Timing Role: Common-mode surge suppressor referenced to local ground, limiting differential and common-mode overvoltage simultaneously. Use Value: Bi-directional operation prevents polarity-dependent misclamping that could distort differential signaling or damage receiver inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A-13 | Unidirectional; same VRWM, VBR, VC, and IPP - but only clamps positive transients relative to cathode. | Requires known polarity in protected circuit; unsuitable for AC or floating nodes. | Select only if system ground reference is fixed and surge polarity is strictly unidirectional. |
| SMBJ90CA-13 | Same electrical specs but SMB (DO-214AA) package - 2.5mm wider body, higher thermal mass, 600W peak power rating. | Better thermal dissipation for repeated surge events; requires larger PCB footprint. | Choose when surge duty cycle exceeds 4 pulses/minute or ambient exceeds 75°C. |
Compared with SMAJ90A-13, SMAJ90CA-13 provides polarity-agnostic protection critical for differential or AC-coupled interfaces; compared with SMBJ90CA-13, it trades lower surge capacity for space-constrained layouts where 400W suffices.
Availability
SMAJ90CA-13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, DC power supply input stages, and RS-485 transceiver interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMAJ90CA-13 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 California, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The SMAJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for robust, cost-effective board-level surge and ESD protection in harsh industrial and automotive environments.
FAQ
What is the meaning of the 'C' suffix in SMAJ90CA-13?
The 'C' denotes bi-directional functionality - the device clamps voltage transients of either polarity between its two terminals. Unlike unidirectional variants (e.g., SMAJ90A-13), it has no cathode marking and behaves identically regardless of voltage polarity, making it ideal for AC or floating signal lines.
Can SMAJ90CA-13 be used in place of a unidirectional TVS in a DC circuit?
Yes - it functions correctly in DC circuits, clamping both positive surges (anode-to-cathode) and negative surges (cathode-to-anode). However, its leakage current specification applies to both directions, and layout must ensure equal thermal coupling to both terminals to maintain symmetric clamping performance.
What is the maximum recommended trace length between SMAJ90CA-13 and the protected IC?
Trace inductance directly impacts clamping effectiveness. For optimal performance, keep total trace length (including return path) under 10 mm. Longer traces add inductive kick during fast transients, raising peak voltage seen by the protected device beyond the rated 146V clamping level.
Does SMAJ90CA-13 meet AEC-Q200 stress testing requirements?
No - SMAJ90CA-13 is not AEC-Q200 qualified. While it operates from –55°C to +150°C and meets IEC 61000-4-2/4-5, Diodes Incorporated does not list this part in its AEC-Q200-certified TVS portfolio. For automotive safety-critical applications, consider the AEC-Q200-qualified P6SMB90CA or SMAJ90CA-Q series instead.
SMAJ90CA-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ90CA-13 FAQ
1.How can I place an order for SMAJ90CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90CA-13 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 reliable?
The price and inventory of SMAJ90CA-13 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 is usually 5 days.
3.What payment methods are accepted for SMAJ90CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90CA-13?
SMAJ90CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90CA-13 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?
For technical support, including SMAJ90CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90CA-13 requirements.
6.How does Aetrix verify that SMAJ90CA-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ90CA-13 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 meets industry standards.
7.What is the process for return or replacement of SMAJ90CA-13?
All SMAJ90CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90CA-13, 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 part is unused and in its original packaging.
Return procedure for SMAJ90CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ90CA-13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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