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Vishay General Semiconductor - Diodes Division SMAJ5.0CAHE3_A/I
- Part No.:
- SMAJ5.0CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0CAHE3_A/I.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,041
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Product details
Overview
SMAJ5.0CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping ESD and surge transients on signal/power lines. It features 5.0 V stand-off voltage (VWM), 6.40–7.07 V breakdown voltage (VBR) at 10 mA, 400 W peak pulse power (10/1000 μs), and clamps to ≤9.2 V at 43.5 A peak surge current - used to protect USB interfaces, sensor I/O, and automotive body control modules.
For engineers reviewing the SMAJ5.0CAHE3_A/I datasheet, SMAJ5.0CAHE3_A/I pinout, SMAJ5.0CAHE3_A/I application, or SMAJ5.0CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping voltage under 43.5 A surge, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient overvoltage events exceeding VWM (5.0 V), it avalanches symmetrically in both directions to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low leakage (<800 μA at VWM).
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, with maximum junction temperature of +150 °C. It meets J-STD-020 MSL Level 1 and supports peak forward surge current (IFSM) of 40 A (8.3 ms half-sine) only in unidirectional variants - not applicable here due to bidirectional construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 5 V logic/sensor rails. |
| VBR min/max | 6.40 V / 7.07 V at 10 mA - tight breakdown window ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 9.2 V at 43.5 A - clamping voltage limits stress on protected ICs during 400 W, 10/1000 μs surges. |
| PPPM | 400 W (10/1000 μs) - peak surge handling capacity suitable for IEC 61000-4-5 Level 3 (1 kV/2 Ω) testing. |
| ID @ VWM | ≤800 μA - low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| Package | SMA (DO-214AC) - surface-mount outline with 0.208" length, compatible with standard pick-and-place and reflow profiles up to 260 °C peak. |
| AEC-Q101 | Qualified - validated for automotive applications including body electronics, infotainment I/O, and ADAS sensor interfaces. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either direction) | Acts as cathode during positive transients; functions identically to cathode under negative transients - fully symmetrical conduction. |
| Cathode | Transient current exit (either direction) | Acts as anode during negative transients; enables bidirectional clamping without external circuit modification. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485, audio) without polarity concerns. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 1 kV open-circuit / 0.5 kA short-circuit without degradation. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standards. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; supports high-yield SMT assembly in volume production. |
| Glass passivated junction | Ensures stable VBR over time and temperature, low leakage drift, and resistance to humidity-induced parameter shift. |
Applications
| Automotive Body Control Module | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and door module microcontroller I/O from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed directly at connector entry point to clamp transients before reaching MCU GPIO or LIN PHY. Use Value: Limits clamping voltage to 9.2 V under 43.5 A surge, preventing latch-up or gate oxide damage in 5 V-tolerant automotive MCUs. |
Use Scenario: Safeguarding analog outputs (4–20 mA) and digital inputs (RS-485) in factory-floor pressure/temperature sensors exposed to motor drive noise. IC Role / Device Role / Timing Role: Low-capacitance (≈350 pF at 0 V) bidirectional clamp on differential signal pairs to preserve signal rise time while suppressing ±1 kV EFT bursts. Use Value: Maintains signal fidelity with <800 μA leakage at 5 V, enabling accurate low-current measurement without offset error. |
| USB 2.0 Data Line Protection | Consumer Appliance Microcontroller I/O |
|
Use Scenario: ESD protection for D+ and D− lines in portable medical devices and docking stations compliant with IEC 61000-4-2 Level 4 (±15 kV contact). IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) TVS placed adjacent to USB connector to shunt ESD current before reaching USB PHY or hub controller. Use Value: Clamps to 9.2 V within nanoseconds, protecting 3.3 V/5 V tolerant PHYs without affecting 480 Mbps data integrity. |
Use Scenario: Overvoltage hardening of push-button inputs, LED drivers, and relay coil flyback paths in smart home appliances. IC Role / Device Role / Timing Role: Primary surge suppression element across microcontroller GPIO pins and 5 V supply rails subjected to user-induced ESD and relay-induced spikes. Use Value: Withstands 400 W surges repeatedly without parametric shift, ensuring long-term field reliability in cost-sensitive white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0CA-E3/61 | Same electrical specs and SMA package; RoHS-compliant but not AEC-Q101 qualified; uses "E3" suffix instead of "HE3". | Intended for commercial/industrial use only; lacks automotive qualification documentation and stress test validation. | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive traceability. |
| SMBJ5.0CAHE3_A/I | Same VWM (5.0 V), VBR (6.40–7.07 V), and bidirectional function; higher PPPM (600 W); larger SMB (DO-214AA) package (0.265" × 0.165"). | Offers greater surge margin for harsher environments (e.g., engine bay); requires PCB layout change due to larger footprint and lead spacing. | Choose when system-level surge testing exceeds 400 W or when thermal derating demands lower RθJA (SMBJ: ~80 °C/W vs. SMAJ: 120 °C/W). |
Compared with SMAJ5.0CA-E3/61, SMAJ5.0CAHE3_A/I adds AEC-Q101 qualification and full automotive traceability; compared with SMBJ5.0CAHE3_A/I, it trades 200 W peak power and thermal margin for space-constrained layouts where SMA's smaller DO-214AC footprint is critical.
Availability
SMAJ5.0CAHE3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB 2.0 port protection, and consumer appliance microcontroller I/O requiring stable component supply across extended production lifecycles.
Supply support for SMAJ5.0CAHE3_A/I 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 was developed for compact, high-reliability transient suppression in space-constrained automotive and industrial systems - delivering AEC-Q101-qualified TVS performance in the industry-standard SMA package.
FAQ
What is the clamping voltage of SMAJ5.0CAHE3_A/I at its rated peak pulse current?
The SMAJ5.0CAHE3_A/I clamps to a maximum of 9.2 V at its peak pulse current of 43.5 A (10/1000 μs waveform). This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures downstream 5 V ICs remain within safe absolute maximum ratings during surge events. The clamping performance is guaranteed across the full operating temperature range of −55 °C to +150 °C.
Is SMAJ5.0CAHE3_A/I suitable for automotive applications?
Yes, SMAJ5.0CAHE3_A/I is AEC-Q101 qualified and specifically intended for automotive use. Its "HE3" suffix denotes RoHS-compliant construction with full AEC-Q101 stress testing - including temperature cycling, high-temperature reverse bias, and ESD robustness - making it appropriate for body control modules, infotainment I/O, and ADAS sensor interfaces where reliability under vibration and thermal cycling is critical.
How does the bidirectional design of SMAJ5.0CAHE3_A/I affect its circuit implementation?
The bidirectional design of SMAJ5.0CAHE3_A/I eliminates polarity marking and allows direct placement across any two-point node - such as differential signal lines (CAN, RS-485) or AC-coupled paths - without regard to voltage polarity. Unlike unidirectional TVS diodes, it provides symmetrical clamping in both directions, simplifying schematic capture and PCB layout while maintaining identical VBR and VC specifications for positive and negative transients.
What is the maximum leakage current of SMAJ5.0CAHE3_A/I at its stand-off voltage?
At its 5.0 V stand-off voltage (VWM), SMAJ5.0CAHE3_A/I exhibits a maximum reverse leakage current (ID) of 800 μA at 25 °C. This low leakage preserves signal integrity in high-impedance sensor circuits and minimizes quiescent power loss in battery-powered devices - critical for always-on environmental monitors and automotive wake-up receivers.
Does SMAJ5.0CAHE3_A/I require special PCB layout considerations for optimal surge performance?
Yes - optimal surge performance requires mounting SMAJ5.0CAHE3_A/I on minimum recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay specification. Smaller pads increase thermal resistance and reduce peak pulse power handling. Additionally, routing should minimize trace inductance between the TVS and protected node - placing it as close as possible to the connector or IC pin improves clamping response and reduces overshoot.
SMAJ5.0CAHE3_A/I 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/I FAQ
1.How can I place an order for SMAJ5.0CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0CAHE3_A/I 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/I reliable?
The price and inventory of SMAJ5.0CAHE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SMAJ5.0CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0CAHE3_A/I?
SMAJ5.0CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0CAHE3_A/I 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/I?
For technical support, including SMAJ5.0CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ5.0CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0CAHE3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of SMAJ5.0CAHE3_A/I?
All SMAJ5.0CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0CAHE3_A/I, 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/I part is unused and in its original packaging.
Return procedure for SMAJ5.0CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0CAHE3_A/I Tags
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