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Diodes Incorporated SMAJ30CAQ-13-F
- Part No.:
- SMAJ30CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30CAQ-13-F.pdf
- Description:
- TVS DIODE 30VWM 48.4VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:15,899
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Product details
Overview
SMAJ30CAQ-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, 30V reverse standoff voltage (VRWM), and clamping voltage of 48.4V at 8.3A peak pulse current. It protects CAN bus, LIN, and body control modules against ISO7637-2 Pulse 1/2a/3a/3b transients and ISO10605 ESD events.
For engineers reviewing the SMAJ30CAQ-13-F datasheet, SMAJ30CAQ-13-F pinout, SMAJ30CAQ-13-F application, or SMAJ30CAQ-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, IEC 61000-4-2/ISO10605 compliance level, AEC-Q101 qualification status, and unidirectional vs. bi-directional polarity requirements for signal line protection.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 33.3–36.8V (min/max) under 1.0mA test current. Its clamping behavior is defined by the 10×1000μs standard waveform, delivering 48.4V VC at IPP = 8.3A - critical for safeguarding 24V automotive electronics within safe operating area limits.
Thermally rated for -55°C to +175°C junction temperature, it supports high-reliability deployment in engine bay and powertrain ECUs. The glass-passivated die and lead-free matte tin plating ensure robustness under thermal cycling and solder reflow per MIL-STD-202, while moisture sensitivity level 1 enables unlimited floor life without dry pack.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10×1000μs surge without failure in automotive load dump or inductive switching events |
| Reverse Standoff Voltage | 30V - maximum continuous working voltage before significant leakage; sets upper limit for 24V system rail protection |
| Clamping Voltage | 48.4V @ 8.3A - peak voltage seen by protected IC during worst-case ISO7637-2 Pulse 1 (−100V) event |
| Breakdown Voltage | 33.3–36.8V @ 1.0mA - ensures reliable turn-on prior to damage threshold of downstream 40V-rated components |
| Leakage Current | <0.5µA @ 30V - negligible standby power loss and no signal integrity impact on low-current sensor lines |
| AEC-Q101 Qualified | Yes - validated for automotive use including temperature cycling, HTRB, and ESD stress per AEC specification |
Pinout & Package
Package: SMA (Surface Mount Axial), molded plastic UL 94V-0, 0.064g weight, cathode band omitted (bi-directional device).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges; symmetrical with Cathode for bidirectional clamping |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges; electrically identical to Anode in bi-directional configuration |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN H/L) without polarity constraints |
| Glass passivated die | Eliminates wire bond corrosion risk and improves long-term reliability under high-humidity under-hood conditions |
| AEC-Q101 qualification | Confirms suitability for automotive safety-critical domains including powertrain and ADAS without additional qualification effort |
| Lead-free & halogen-free | Meets RoHS 3 and automotive green standards (<900ppm Br/Cl, <1000ppm Sb), supporting end-of-life recycling compliance |
Applications
| Automotive CAN Bus Protection | Body Control Module (BCM) Power Input |
|---|---|
Use Scenario: Protecting CAN transceivers from battery load dump and alternator ripple-induced transients in 12V/24V vehicle networks. IC Role / Device Role: Bi-directional TVS placed between CAN_H/CAN_L and ground to clamp common-mode surges while preserving signal integrity. Use Value: Clamps to 48.4V - well below typical CAN transceiver absolute max rating (58V), preventing latch-up or permanent damage during ISO7637-2 Pulse 1. | Use Scenario: Safeguarding microcontroller power rails in BCMs exposed to cranking spikes and jump-start overvoltage. IC Role / Device Role: Parallel-connected TVS across VCC-GND to shunt energy from −100V (Pulse 1) and +100V (Pulse 3b) events. Use Value: 400W peak power rating absorbs full ISO7637-2 Pulse 1 energy (100V × 10Ω × 10ms) without degradation over 100,000 cycles. |
| Automotive LIN Bus Node | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Shielding LIN transceivers from ESD events during assembly and service, per ISO10605 30kV contact discharge. IC Role / Device Role: Low-capacitance bi-directional TVS placed directly at connector pins to minimize stub length and preserve 19.2kbps signal rise time. Use Value: Sub-1µA leakage at 30V prevents false wake-up in sleep mode; 48.4V clamping stays below LIN IC's 40V abs max when derated for temperature. | Use Scenario: Protecting analog sensor inputs (e.g., torque, position) in EPS systems from coupled noise during motor commutation. IC Role / Device Role: TVS mounted at PCB edge near sensor connector to intercept fast-rising transients before reaching precision ADC front-end. Use Value: 33.3–36.8V VBR ensures activation before 3.3V/5V rail overvoltage reaches op-amp input stages, avoiding saturation or latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-Q | Uni-directional; anode grounded; VF = 3.5V @ 35A forward surge | Requires correct polarity orientation; unsuitable for AC/differential lines like CAN | Select only if protecting DC rails where polarity is fixed and forward conduction must be blocked |
| SMCJ33CA | Higher 1500W rating; DO-214AB package; VRWM = 33V; VC = 53.3V @ 28.3A | Larger footprint; better for higher-energy transients but over-specified for ISO10605/7637-2 in most body electronics | Prefer when system-level testing reveals margin shortfall with 400W rating or when board space allows larger package |
Compared with SMAJ30A-Q, SMAJ30CAQ-13-F enables polarity-agnostic placement on differential buses; compared with SMCJ33CA, it offers tighter board integration and lower cost for standard automotive surge profiles without sacrificing AEC-Q101 compliance.
Availability
SMAJ30CAQ-13-F is available at Aetrix Electronics and suitable for automotive infotainment head units, body control modules, and electric power steering systems requiring stable component supply across multi-year production programs.
Supply support for SMAJ30CAQ-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 series targets AEC-Q101-compliant transient suppression in harsh automotive environments, with design focus on ISO7637-2 and ISO10605 compliance, thermal robustness, and PPAP-ready manufacturing in IATF 16949 facilities.
FAQ
What does the 'C' suffix in SMAJ30CAQ-13-F signify?
The 'C' denotes bi-directional configuration, meaning the device clamps transients of either polarity symmetrically. Unlike uni-directional variants (e.g., SMAJ30AQ), it has no cathode band marking and functions identically between anode and cathode terminals - essential for protecting differential buses like CAN or LIN without polarity concerns.
Is SMAJ30CAQ-13-F qualified for under-hood applications?
Yes - it is AEC-Q101 qualified and rated for junction temperatures from −55°C to +175°C. Its glass-passivated die, matte tin lead finish, and UL 94V-0 molding compound meet under-hood reliability requirements, including resistance to thermal shock, humidity, and chemical exposure per IATF 16949 manufacturing controls.
How does its clamping voltage compare to system voltage rails?
With VRWM = 30V and VC = 48.4V @ 8.3A, it safely protects 24V nominal systems: clamping occurs well below the 58V absolute maximum rating of most automotive CAN transceivers and above the 36V typical load-dump ceiling, providing 12.4V design margin for transient overshoot and temperature derating.
Can it replace SMAJ33CA in existing designs?
No - SMAJ33CA has 33V VRWM and 53.3V clamping, making it incompatible for 30V-system designs requiring tighter clamping margin. Substituting would raise clamping voltage by 4.9V, risking overvoltage damage to 40V-rated ICs; redesign validation per ISO7637-2 Pulse 1 is required if changing standoff voltage.
SMAJ30CAQ-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- 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
SMAJ30CAQ-13-F FAQ
1.How can I place an order for SMAJ30CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30CAQ-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 SMAJ30CAQ-13-F reliable?
The price and inventory of SMAJ30CAQ-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 SMAJ30CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ30CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30CAQ-13-F?
SMAJ30CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30CAQ-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 SMAJ30CAQ-13-F?
For technical support, including SMAJ30CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30CAQ-13-F requirements.
6.How does Aetrix verify that SMAJ30CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ30CAQ-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 SMAJ30CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ30CAQ-13-F?
All SMAJ30CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30CAQ-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 SMAJ30CAQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ30CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ30CAQ-13-F Tags
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Diodes Incorporated
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