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Vishay General Semiconductor - Diodes Division SMA5J20CAHE3_A/H
- Part No.:
- SMA5J20CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J20CAHE3_A/H.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,594
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Product details
Overview
SMA5J20CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 20 V standoff voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), 32.4 V clamping voltage at 15.4 A peak pulse current (IPPM), and 500 W peak pulse power (10/1000 µs waveform). It is AEC-Q101 qualified and used to protect automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.
For engineers reviewing the SMA5J20CAHE3_A/H datasheet, SMA5J20CAHE3_A/H pinout, SMA5J20CAHE3_A/H application, or SMA5J20CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, 150 °C junction temperature rating, RoHS-compliant AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance in forward and reverse directions per ANSI/IEEE C62.35 standards. Its glass-passivated junction ensures stable breakdown behavior under repetitive surge stress, and its MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device uses a planar silicon junction structure optimized for fast response (<1 ps) and low dynamic impedance. Thermal resistance is characterized at RθJA = 80 °C/W (typ.) and RθJL = 25 °C/W (typ.), enabling reliable operation in compact PCB layouts with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR min/max | 22.2 V / 24.5 V at 1 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 32.4 V at 15.4 A - Clamping voltage limits downstream IC stress during 500 W surge events (10/1000 µs). |
| PPPM | 500 W - Peak pulse power handling capacity determines survivability against ISO 7637-2 Pulse 5a/b or IEC 61000-4-5 surges. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and thermally constrained industrial enclosures. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with J-STD-020 reflow profiles. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration - no polarity marking; symmetrical two-terminal construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Terminal 1) | Surge input/output node | Either terminal accepts transient energy; bidirectional symmetry eliminates orientation constraints during placement. |
| Anode/Cathode (Terminal 2) | Surge input/output node | Paired with Terminal 1 to form a balanced clamping path; enables protection of differential or floating signal lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - simplifies layout for AC-coupled or floating bus protection (e.g., CAN, LIN, RS-485). |
| Glass-passivated junction | Stable leakage (<1 μA at VWM) and repeatable breakdown over 1000+ surge cycles - critical for long-life automotive modules. |
| Low incremental surge resistance | Dynamic impedance <1.5 Ω calculated from (VC − VBR)/IPPM - minimizes voltage overshoot during fast-rising transients. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow without pre-baking - reduces manufacturing complexity and cost. |
| AEC-Q101 qualification | Validated for automotive under-hood applications including temperature cycling, humidity bias, and mechanical shock. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting 24 V analog sensor inputs (e.g., pressure, temperature) in engine control units from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground to clamp transients before they reach precision ADC front-end. Use Value: Limits voltage excursion to ≤32.4 V during 500 W surges, preserving 16-bit ADC accuracy and preventing latch-up in op-amps. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges and ESD. IC Role / Device Role / Timing Role: Two-terminal shunt protector across loop terminals, absorbing energy without interrupting DC bias. Use Value: Maintains loop integrity during 1 kV/500 A surge tests (IEC 61000-4-5) while adding <0.5 pF capacitance at 0 V bias. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Secondary-level protection on Ethernet PHY or DSL line drivers subjected to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Fast-response clamping device placed after primary GDT or MOV, limiting residual voltage to IC-safe levels. Use Value: Responds in <1 ps to clamp 10/1000 µs transients to 32.4 V, reducing stress on 3.3 V or 5 V PHY transceivers. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to absorb inductive kickback during MOSFET switching. Use Value: Handles 40 A non-repetitive forward surge (IFSM) and dissipates 500 W pulses without degradation over 10,000 cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ20CA | Same VWM (20 V), slightly higher VC (34.0 V @ 14.7 A), lower PPPM (400 W), non-AEC-Q101 rated | Not qualified for automotive under-hood use; suitable for commercial/industrial only | Select when AEC-Q101 is not required and board space allows minor derating for same clamping margin |
| ON Semiconductor 1.5SMC20CA | Same VWM (20 V), identical VC (32.4 V @ 15.4 A), same PPPM (500 W), AEC-Q101 qualified, but larger SMC (DO-214AB) package | Requires 2.5× more PCB area; higher thermal mass improves sustained surge handling but slows response marginally | Select when higher thermal inertia is preferred and layout accommodates 7.11 mm × 6.22 mm footprint |
Compared with SMAJ20CA and 1.5SMC20CA, the SMA5J20CAHE3_A/H delivers identical clamping performance in a smaller SMA package with certified automotive qualification-enabling compact, high-reliability designs where space and compliance are jointly constrained.
Availability
SMA5J20CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface designs requiring stable component supply, AEC-Q101 traceability, and high-power transient suppression.
Supply support for SMA5J20CAHE3_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, power density, and automotive-grade validation.
The SMA5J series is engineered for high-energy transient suppression in space-constrained, high-reliability applications-including automotive ECUs, industrial automation, and communications infrastructure-where consistent clamping and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the SMA5J20CAHE3_A/H at its rated peak pulse current?
The SMA5J20CAHE3_A/H has a maximum clamping voltage (VC) of 32.4 V at 15.4 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains within safe operating limits during standardized surge events. The SMA5J20CAHE3_A/H maintains this clamping performance bidirectionally.
Is the SMA5J20CAHE3_A/H suitable for automotive applications?
Yes, the SMA5J20CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It undergoes stress testing for high-temperature operation (TJ = 150 °C), thermal cycling, and humidity bias per AEC requirements. The SMA5J20CAHE3_A/H is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces.
Does the SMA5J20CAHE3_A/H have polarity markings on the package?
No, the SMA5J20CAHE3_A/H is a bidirectional TVS diode and carries no polarity marking on the SMA (DO-214AC) case. Its symmetrical construction means either terminal functions identically as anode or cathode depending on transient polarity-eliminating orientation concerns during automated placement and simplifying PCB layout.
What is the maximum junction temperature rating for the SMA5J20CAHE3_A/H?
The SMA5J20CAHE3_A/H has a maximum junction temperature (TJ) rating of +150 °C, verified per thermal characterization data in the Vishay datasheet (Document Number: 88875). This enables reliable operation in under-hood automotive environments and sealed industrial enclosures where ambient temperatures exceed 105 °C.
How does the SMA5J20CAHE3_A/H differ from unidirectional variants like SMA5J20AHE3_A/H?
The SMA5J20CAHE3_A/H is bidirectional with symmetrical clamping in both directions, while SMA5J20AHE3_A/H is unidirectional and features a cathode band marking. The "CA" suffix indicates bidirectional functionality, resulting in identical VBR, VC, and IPPM ratings for positive and negative transients-making the SMA5J20CAHE3_A/H ideal for AC-coupled or floating signal lines.
SMA5J20CAHE3_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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- Power - Peak Pulse:
- 500W
- 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)
SMA5J20CAHE3_A/H FAQ
1.How can I place an order for SMA5J20CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J20CAHE3_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 SMA5J20CAHE3_A/H reliable?
The price and inventory of SMA5J20CAHE3_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 SMA5J20CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J20CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J20CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J20CAHE3_A/H?
SMA5J20CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J20CAHE3_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 SMA5J20CAHE3_A/H?
For technical support, including SMA5J20CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J20CAHE3_A/H requirements.
6.How does Aetrix verify that SMA5J20CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J20CAHE3_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 SMA5J20CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J20CAHE3_A/H?
All SMA5J20CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J20CAHE3_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 SMA5J20CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMA5J20CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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