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Diodes Incorporated SMAJ24CA-13-F
- Part No.:
- SMAJ24CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ24CA-13-F.pdf
- Description:
- TVS DIODE 24VWM 38.9VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:94,163
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Product details
Overview
SMAJ24CA-13-F from Diodes Incorporated is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power lines and signal interfaces. It features a 24V reverse standoff voltage (VRWM), 38.9V maximum clamping voltage at 10.3A peak pulse current, and fast response time under 1ps. Used in automotive infotainment power rails and industrial sensor I/O protection.
For engineers reviewing the SMAJ24CA-13-F datasheet, SMAJ24CA-13-F pinout, SMAJ24CA-13-F application, or SMAJ24CA-13-F equivalent, key selection criteria include clamping voltage margin relative to system operating voltage, unidirectional vs. bidirectional polarity requirements, IEC 61000-4-2/4-5 compliance readiness, and thermal derating above +25°C ambient.
Technical Context
This bidirectional TVS operates as a voltage-clamped shunt device that remains high-impedance below VRWM = 24V and transitions to low-impedance conduction when transient voltages exceed VBR (min 26.7V, max 29.5V at 1mA). Its glass-passivated junction ensures stable breakdown characteristics across temperature.
It handles 400W non-repetitive peak pulse power per the 10/1000µs waveform, with clamping performance validated at IPP = 10.3A and VC = 38.9V. Thermal derating begins above +25°C ambient, maintaining 1.0W steady-state dissipation only up to TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - supports single-event transients per IEC 61000-4-5 Level 4 (4kV surge) |
| Reverse Standoff Voltage | 24V - defines maximum continuous DC operating voltage before leakage exceeds 5µA |
| Clamping Voltage | 38.9V @ 10.3A - limits protected circuit voltage during worst-case surge event |
| Breakdown Voltage | 26.7–29.5V @ 1mA - ensures reliable turn-on margin above VRWM with production tolerance |
| Package | SMA - surface-mount footprint compatible with IPC-7351B SO-201 standard, 0.064g mass |
| Operating Temperature | −55°C to +150°C - qualified for under-hood automotive and industrial environments |
Pinout & Package
Two-terminal bidirectional device in SMA package (DO-214AC); cathode band absent-symmetrical terminals with no polarity marking. Case material is UL 94V-0 molded plastic; terminals feature matte tin plating, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal conducts during positive or negative surges; no directional bias required |
| Case | Mechanical mounting / thermal path | Plastic body provides electrical isolation; copper leadframe enables PCB heat spreading |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables robust protection against IEC 61000-4-5 combination wave surges without external series impedance |
| Glass passivated die | Ensures long-term stability of breakdown voltage and leakage current under thermal cycling and humidity stress |
| Bidirectional configuration | Protects AC-coupled or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns |
| RoHS 3 & "Green" compliant | Contains <900ppm Br, <900ppm Cl, <1000ppm Sb - meets automotive and industrial environmental compliance mandates |
Applications
| Automotive Infotainment Power Rail | Industrial RS-485 Communication Port |
|---|---|
Use Scenario: Protects 24V supply input of head unit modules against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt-type transient clamp placed directly at connector entry point before DC-DC converter input. Use Value: Limits voltage excursion to ≤38.9V during 10.3A surge, preserving downstream regulator integrity and avoiding brownout resets. |
Use Scenario: Safeguards differential data lines in factory automation PLCs exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS connected between A/B lines and ground, symmetrically suppressing ±15kV contact ESD per IEC 61000-4-2. Use Value: Clamps transients within 1ps response time while adding <0.5pF capacitance per line-no signal integrity degradation at 10Mbps. |
| Smart Meter AC Mains Interface | Medical Sensor Signal Conditioning Input |
Use Scenario: Shields microcontroller-based metering ICs from surges coupled via 230VAC input filtering stage. IC Role / Device Role / Timing Role: Secondary-level TVS after MOV primary protection, handling residual ringwave energy per IEC 61000-4-5. Use Value: Withstands 400W pulses without degradation, enabling >100,000 surge events over product lifetime. |
Use Scenario: Protects low-noise instrumentation amplifier inputs in portable patient monitors from ESD during cable handling. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on analog front-end inputs referenced to isolated ground. Use Value: Delivers 24V standoff with 38.9V clamping-maintains signal fidelity for ±10V full-scale biomedical signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24C-13-F (Diodes) | No "A" suffix indicates non-automotive grade; same electrical specs but not PPAP-capable or AEC-Q200 qualified | Lacks change control documentation and IATF 16949 traceability required for Tier-1 automotive programs | Select only for cost-sensitive industrial or consumer designs where automotive qualification is unnecessary |
| SMBJ24CA (Littelfuse) | Same VRWM/VC/IPP specs but SMB package (larger footprint, higher thermal mass); 600W rating | Higher power handling allows longer surge duration support but requires larger PCB area and different pad layout | Choose when system-level surge testing exceeds 400W or thermal management demands greater heatsinking capability |
Compared with SMAJ24C-13-F, the "A" suffix confirms AEC-Q200 qualification and PPAP readiness; compared with SMBJ24CA, the SMAJ24CA-13-F offers identical protection performance in a 30% smaller footprint-critical for space-constrained automotive ECUs.
Availability
SMAJ24CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial communication ports, and smart metering platforms requiring stable component supply with full AEC-Q200 compliance and traceable sourcing.
Supply support for SMAJ24CA-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 integrated circuits, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
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-emphasizing AEC-Q200 qualification, low clamping ratio, and robust surge endurance.
FAQ
What does the "A" suffix in SMAJ24CA-13-F signify?
The "A" suffix denotes AEC-Q200 qualification, confirming that this part has passed stress tests for temperature cycling, humidity bias, mechanical shock, and vibration per automotive reliability standards. It also indicates PPAP capability and production in IATF 16949-certified facilities-required for Tier-1 automotive supply chains.
Can SMAJ24CA-13-F replace a unidirectional TVS in a DC power rail?
No-it is strictly bidirectional and lacks polarity marking. Using it on a DC rail without proper circuit analysis risks unintended conduction during normal operation. For DC applications, select the unidirectional SMAJ24A-13-F variant, which includes a cathode band and blocks reverse current during standby.
How does its clamping voltage compare to system voltage margins?
With VRWM = 24V and VC = 38.9V at 10.3A, it provides 14.9V headroom above standoff-sufficient to protect 24V nominal systems with ±10% regulation tolerance (21.6–26.4V) while staying below typical 40V absolute maximum ratings of downstream regulators and controllers.
Is thermal derating required for continuous operation?
Yes-steady-state power dissipation is limited to 1.0W only at TL = +75°C. At ambient temperatures above +25°C, the device must be mounted on adequate copper area (≥100mm² per lead) or use thermal vias to maintain junction temperature ≤+150°C; derating curves show 50% power reduction at +100°C ambient.
SMAJ24CA-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- 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
SMAJ24CA-13-F FAQ
1.How can I place an order for SMAJ24CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ24CA-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 SMAJ24CA-13-F reliable?
The price and inventory of SMAJ24CA-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 SMAJ24CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ24CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ24CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ24CA-13-F?
SMAJ24CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ24CA-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 SMAJ24CA-13-F?
For technical support, including SMAJ24CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ24CA-13-F requirements.
6.How does Aetrix verify that SMAJ24CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ24CA-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 SMAJ24CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ24CA-13-F?
All SMAJ24CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ24CA-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 SMAJ24CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ24CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ24CA-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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