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Diodes Incorporated SMAJ20CAQ-13-F
- Part No.:
- SMAJ20CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ20CAQ-13-F.pdf
- Description:
- TVS DIODE 20VWM 32.4VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,093
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Product details
Overview
SMAJ20CAQ-13-F from Diodes Incorporated is a bi-directional automotive-grade transient voltage suppressor (TVS) diode in SMA package, rated for 400W peak pulse power, 20V reverse standoff voltage (VRWM), and 32.4V max clamping voltage (VC) at 12.3A peak pulse current (IPP); designed to protect CAN, LIN, and sensor interfaces in vehicle body control modules against ISO7637-2 Pulse 1/2a/3a/3b transients and ISO10605 ESD events.
For engineers reviewing the SMAJ20CAQ-13-F datasheet, SMAJ20CAQ-13-F pinout, SMAJ20CAQ-13-F application, or SMAJ20CAQ-13-F equivalent, this device is selected for AEC-Q101-compliant surge protection where bidirectional clamping, low leakage (<0.5µA @ VRWM), and IATF 16949-manufactured traceability are required in 12V/24V automotive subsystems.
Technical Context
This bi-directional TVS operates symmetrically across both polarities with identical clamping behavior - breakdown occurs at 22.2V min / 24.5V max (VBR @ IT = 1.0mA), enabling robust protection of differential buses like CAN FD without polarity sensitivity. Its glass-passivated die ensures stable VBR over temperature and long-term reliability under repeated surge stress.
The device complies with ISO7637-2 Pulse 1 (–100V), Pulse 2a (+50V), Pulse 3a (–150V), and Pulse 3b (+100V), and meets ISO10605 ESD requirements (30kV air/contact discharge) - validated under automotive-grade thermal cycling (–55°C to +175°C operating range) and moisture sensitivity Level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains 10×1000μs transient surges without failure in automotive load-dump or inductive switching events |
| Reverse Standoff Voltage (VRWM) | 20V - defines maximum continuous working voltage before clamping initiates; matches 12V system nominal + margin |
| Max Clamping Voltage (VC) | 32.4V @ IPP = 12.3A - limits downstream IC voltage during worst-case ISO7637-2 Pulse 1 (–100V) event |
| Breakdown Voltage (VBR) | 22.2V min / 24.5V max @ IT = 1.0mA - ensures consistent turn-on threshold across production lots and temperature |
| Leakage Current (IR) | <0.5µA @ VRWM - negligible standby power loss and no signal integrity impact on high-impedance sensor lines |
| Operating Temperature | –55°C to +175°C - supports under-hood placement in engine control units and transmission controllers |
Pinout & Package
Package: SMA (Surface Mount Assembly), molded plastic UL 94V-0, 0.064g weight, cathode band omitted (bi-directional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Transient current entry point (negative polarity) | Accepts reverse surge energy during negative transients (e.g., ISO7637-2 Pulse 1, Pulse 3a) |
| Cathode (Pin 2) | Transient current entry point (positive polarity) | Accepts forward surge energy during positive transients (e.g., ISO7637-2 Pulse 2a, Pulse 3b) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified & PPAP capable | Validated for automotive production use with full change control and IATF 16949 manufacturing traceability |
| Glass-passivated junction | Ensures stable VBR and low leakage across –55°C to +175°C; eliminates passivation-related drift in harsh environments |
| Bi-directional clamping symmetry | Identical VC (32.4V) and VBR (22.2–24.5V) for both polarities - critical for protecting differential buses without polarity bias |
| Lead-free, halogen-free "Green" construction | RoHS 3 compliant (2015/863/EU); <900ppm Br, <900ppm Cl, <1000ppm Sb - meets global automotive environmental mandates |
Applications
| Automotive CAN Bus Protection | Body Control Module (BCM) Power Input |
|---|---|
|
Use Scenario: Protecting high-speed CAN FD transceivers (e.g., TJA1057) from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Bi-directional TVS placed between CAN_H/CAN_L and chassis ground, clamping common-mode surges while preserving signal integrity. Use Value: Limits voltage excursion to ≤32.4V during ISO7637-2 Pulse 1 (–100V), preventing transceiver latch-up or permanent damage. |
Use Scenario: Safeguarding 12V input rails of BCM microcontrollers (e.g., S32K144) against ISO7637-2 Pulse 2a (+50V) and Pulse 3b (+100V) spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, positioned upstream of DC-DC converters and LDOs. Use Value: Absorbs up to 400W for 10×1000μs, maintaining downstream regulator input within safe operating area. |
| Automotive Sensor Interface Protection | Infotainment System USB/UART Lines |
|
Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) in ADAS domain controllers from ESD and coupled noise. IC Role / Device Role / Timing Role: Low-leakage (≤0.5µA) bi-directional clamp on sensor signal lines referenced to vehicle ground. Use Value: Prevents ESD-induced offset drift or ADC saturation while adding <0.1pF parasitic capacitance - no bandwidth degradation. |
Use Scenario: Protecting UART debug ports and USB-C CC lines in head unit ECUs from hot-plug ESD and cable-induced transients. IC Role / Device Role / Timing Role: Secondary-level TVS on low-voltage digital interface lines, co-located with ferrite beads and series resistors. Use Value: Meets ISO10605 30kV contact discharge requirement without compromising signal rise time (no RC delay). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC20C-13-F | Same VRWM (20V), lower PPK (300W), higher VC (35.5V @ 11.2A), non-AEC-Q101 | Limited to non-safety-critical infotainment peripherals; not PPAP-capable | Select only for cost-sensitive non-automotive industrial designs requiring same VRWM but lower surge rating |
| SMCJ20CA | Higher PPK (1500W), larger SMC package (7.11 × 6.22 mm), same VRWM/VC specs, AEC-Q101 qualified | Used where higher surge margin is needed (e.g., alternator output lines), but requires more PCB area | Choose when system-level testing reveals >400W surge exposure; accept 3× footprint increase for 3.75× power margin |
Compared with SAC20C-13-F, SMAJ20CAQ-13-F delivers certified automotive reliability and 33% higher surge capacity; versus SMCJ20CA, it trades 64% smaller footprint for 73% lower peak power - optimal for space-constrained CAN/LIN nodes where 400W suffices.
Availability
SMAJ20CAQ-13-F is available at Aetrix Electronics and suitable for automotive body electronics, powertrain sensor interfaces, and infotainment subsystems requiring stable component supply with full AEC-Q101 documentation and lot traceability.
Supply support for SMAJ20CAQ-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, specializing in high-reliability components for automotive, industrial, and computing markets.
The SMAJ(AQ) series is engineered specifically for AEC-Q101-compliant transient suppression in 12V/24V automotive electrical systems - targeting CAN, LIN, FlexRay, and sensor power/signal lines exposed to ISO7637-2 and ISO10605 threats.
FAQ
Is SMAJ20CAQ-13-F unidirectional or bidirectional?
SMAJ20CAQ-13-F is a bi-directional TVS diode, indicated by the "C" suffix in the part number. It provides symmetrical clamping for both positive and negative transients without polarity dependence, making it ideal for differential bus protection like CAN and LIN where signal polarity reverses during normal operation.
What is the maximum clamping voltage at rated peak current?
The maximum clamping voltage (VC) is 32.4V at a peak pulse current (IPP) of 12.3A, measured using the standardized 10×1000μs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (–55°C to +175°C) and ensures downstream ICs remain within absolute maximum ratings during ISO7637-2 Pulse 1 events.
Does this device meet AEC-Q101 qualification requirements?
Yes - SMAJ20CAQ-13-F is fully AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949-certified facilities. Test reports include HTOL, TC, UHAST, and ESD validation per AEC-Q101 Rev D, with full documentation available upon request for automotive production release.
How does its leakage current compare to standard industrial TVS diodes?
At VRWM = 20V and TA = +25°C, SMAJ20CAQ-13-F exhibits ≤0.5µA reverse leakage - significantly lower than typical industrial-grade TVS diodes (often 1–5µA). This enables use on high-impedance sensor inputs and low-power always-on circuits without measurable quiescent current penalty.
SMAJ20CAQ-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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 12.3A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ20CAQ-13-F FAQ
1.How can I place an order for SMAJ20CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ20CAQ-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 SMAJ20CAQ-13-F reliable?
The price and inventory of SMAJ20CAQ-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 SMAJ20CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ20CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ20CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ20CAQ-13-F?
SMAJ20CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ20CAQ-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 SMAJ20CAQ-13-F?
For technical support, including SMAJ20CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ20CAQ-13-F requirements.
6.How does Aetrix verify that SMAJ20CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ20CAQ-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 SMAJ20CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ20CAQ-13-F?
All SMAJ20CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ20CAQ-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 SMAJ20CAQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ20CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ20CAQ-13-F Tags
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