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Vishay General Semiconductor - Diodes Division SMAJ5.0CAHE3_A/H
- Part No.:
- SMAJ5.0CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0CAHE3_A/H.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ5.0CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 5.0 V stand-off voltage (VWM), 6.40–7.25 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 μs), ≤9.2 V clamping voltage at 43.5 A IPPM, and operates across –55 °C to +150 °C junction temperature - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMAJ5.0CAHE3_A/H datasheet, SMAJ5.0CAHE3_A/H pinout, SMAJ5.0CAHE3_A/H application, or SMAJ5.0CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 400 W surge rating with low clamping voltage, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device implements a silicon avalanche diode structure optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints, while the glass-passivated junction ensures stable leakage performance and long-term reliability under repetitive surge stress.
The SMAJ5.0CAHE3_A/H is rated for 400 W peak pulse power at TA = 25 °C (derated above 25 °C per Fig. 2), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. It meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance, supporting high-reliability deployment in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for protected line. |
| VBR min/max | 6.40 V / 7.25 V at IT = 10 mA - Confirmed breakdown range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 9.2 V at 43.5 A - Clamping voltage limits downstream IC stress during 10/1000 μs surge; critical for MOSFET gate or MCU I/O protection. |
| PPPM | 400 W (10/1000 μs waveform) - Peak energy absorption capacity; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| ID @ VWM | 800 μA max - Low leakage preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max | +150 °C - Enables operation in under-hood automotive or high-ambient industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, 2-terminal case with no polarity marking for bidirectional configuration. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current from either direction; connects to protected line (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current exit point (bidirectional) | Routes clamped current to ground or return path; requires low-inductance PCB trace to GND plane. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables symmetric protection of AC or differential signals (e.g., USB D+/D−, RS-485) without external polarity management. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics requiring zero-failure field reliability. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 4th-level surges (4 kV line-to-ground) when mounted on 5.0 mm × 5.0 mm copper pads per spec. |
| Glass-passivated junction | Ensures stable VBR and low ID over lifetime, even under thermal cycling and humidity exposure in industrial environments. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without pre-baking; supports high-yield automated assembly. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamps transients before they reach the ADC input or signal conditioning amplifier. Use Value: Maintains <5.0 V signal integrity during 100 V/50 ms load dump events, preventing ADC saturation or latch-up in AEC-Q100 Grade 2 systems. |
Use Scenario: Shielding RS-485 transceivers in factory automation PLCs from EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Fast-clamping TVS placed directly at connector pins to shunt surge energy away from transceiver ESD structures. Use Value: Limits voltage across transceiver A/B lines to ≤9.2 V during 40 A surges, preserving ±7 V common-mode range and enabling >1 Mbps data integrity. |
| Consumer USB Port Protection | Power Supply Input Stage |
|
Use Scenario: Safeguarding USB 2.0 data lines in portable medical devices against human-body-model ESD (±15 kV contact). IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed inline with D+ and D− traces to absorb sub-nanosecond ESD spikes. Use Value: Delivers <1 pF junction capacitance (per Fig. 4), avoiding signal rise-time degradation while meeting IEC 61000-4-2 Level 4 immunity. |
Use Scenario: Secondary-side transient suppression on 5 V DC input rails of embedded controllers after DC/DC conversion. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs switching noise and back-EMF from nearby relays or solenoids. Use Value: Withstands 400 W surges without degradation, ensuring uninterrupted operation during 100 ms 24 V transients on shared 5 V bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0CA-M3 | Halogen-free, RoHS-compliant, same electrical specs and AEC-Q101 qualification; differs only in material composition (HM3 vs HE3). | No functional difference; selected where halogen-free BOM compliance is mandated by OEM or regional regulation. | Choose SMAJ5.0CAHE3_A/H for standard RoHS automotive use; select SMAJ5.0CAHM3_A/H only if halogen-free certification is contractually required. |
| SMBJ5.0CAHE3_A/H | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; 600 W PPPM rating and lower RθJA (80 °C/W). | Better thermal performance and higher surge margin; requires larger PCB footprint and different pad layout. | Prefer SMAJ5.0CAHE3_A/H for space-constrained automotive modules; choose SMBJ5.0CAHE3_A/H when 600 W surge headroom or extended thermal margin is needed. |
Compared with SMAJ5.0CAHE3_A/H, SMAJ5.0CA-M3 offers identical protection performance with halogen-free materials, while SMBJ5.0CAHE3_A/H trades compact size for higher power handling and improved thermal dissipation - guiding selection based on board area, regulatory, and surge severity requirements.
Availability
SMAJ5.0CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer USB ports, and DC power input stages requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMAJ5.0CAHE3_A/H 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through validated, high-surge-capability components.
FAQ
What is the clamping voltage of SMAJ5.0CAHE3_A/H at its rated peak pulse current?
The SMAJ5.0CAHE3_A/H has a maximum clamping voltage (VC) of 9.2 V at 43.5 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is guaranteed per the Vishay datasheet (Document Number: 88390, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events. Designers use this parameter to verify that downstream components like microcontrollers or transceivers remain within their absolute maximum ratings.
Is SMAJ5.0CAHE3_A/H qualified for automotive applications?
Yes, SMAJ5.0CAHE3_A/H is AEC-Q101 qualified, as confirmed in the Vishay datasheet under "MECHANICAL DATA" and "ORDERING INFORMATION" sections. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified versions. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD robustness - making SMAJ5.0CAHE3_A/H suitable for engine control units, ADAS sensors, and body electronics where automotive-grade reliability is mandatory.
What does the "CA" suffix indicate in SMAJ5.0CAHE3_A/H?
The "CA" suffix in SMAJ5.0CAHE3_A/H designates a bidirectional configuration, meaning the device provides symmetrical transient suppression for both polarities - unlike unidirectional "A" variants that require correct cathode orientation. Per Vishay documentation, electrical characteristics (VBR, VC, IPPM) apply identically in both directions, enabling use on AC-coupled lines, differential buses (e.g., CAN, RS-485), or any signal path where voltage polarity reversal may occur during transients.
What is the thermal resistance of SMAJ5.0CAHE3_A/H, and how does it affect PCB layout?
SMAJ5.0CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W, as specified in the "THERMAL CHARACTERISTICS" table. These values assume mounting on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain surge rating and avoid thermal runaway, designers must implement adequate copper pour and minimize trace length between device terminals and ground/power planes - especially critical in high-duty-cycle or high-ambient environments.
How does SMAJ5.0CAHE3_A/H compare to SMAJ5.0AHE3_A/H in practical circuit protection?
SMAJ5.0CAHE3_A/H is bidirectional with symmetrical clamping, while SMAJ5.0AHE3_A/H is unidirectional and requires correct cathode orientation relative to system ground. In practice, SMAJ5.0CAHE3_A/H simplifies layout for differential or AC signals (e.g., USB, CAN) and eliminates polarity-check errors during assembly. SMAJ5.0AHE3_A/H offers slightly lower forward voltage (VF = 3.5 V at 25 A) but cannot protect reverse-polarity transients - making SMAJ5.0CAHE3_A/H the preferred choice for robust, polarity-agnostic protection in modern mixed-signal systems.
SMAJ5.0CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- 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:
- DO-214AC (SMA)
SMAJ5.0CAHE3_A/H FAQ
1.How can I place an order for SMAJ5.0CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0CAHE3_A/H 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 SMAJ5.0CAHE3_A/H reliable?
The price and inventory of SMAJ5.0CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ5.0CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0CAHE3_A/H?
SMAJ5.0CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0CAHE3_A/H 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 SMAJ5.0CAHE3_A/H?
For technical support, including SMAJ5.0CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ5.0CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0CAHE3_A/H 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 SMAJ5.0CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ5.0CAHE3_A/H?
All SMAJ5.0CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0CAHE3_A/H, 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 SMAJ5.0CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ5.0CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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