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Vishay General Semiconductor - Diodes Division SMA5J20CAHE3/61
- Part No.:
- SMA5J20CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J20CAHE3/61.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,957
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Product details
Overview
SMA5J20CAHE3/61 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 (PPPM) with 10/1000 µs waveform. It is AEC-Q101 qualified and used in automotive sensor interface protection.
For engineers reviewing the SMA5J20CAHE3/61 datasheet, SMA5J20CAHE3/61 pinout, SMA5J20CAHE3/61 application, or SMA5J20CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.45), AEC-Q101 qualification, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering consistent clamping performance without polarity dependence. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while low incremental surge resistance minimizes voltage overshoot during transient events.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 (260 °C peak reflow). Its 500 W peak pulse power rating applies under standardized 10/1000 µs waveform conditions with derating above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 22.2–24.5 V at 1 mA - Confirmed avalanche initiation range; ensures reliable turn-on during overvoltage transients. |
| VC (Clamping Voltage) | 32.4 V at IPPM = 15.4 A - Peak voltage seen by protected circuit during 500 W surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 500 W (10/1000 µs) - Energy-handling capacity for single transient events; validated with 0.2" × 0.2" copper pad layout. |
| TJ max. | +150 °C - Maximum junction temperature limit; supports operation in under-hood automotive environments. |
| RθJA | 80 °C/W - Thermal resistance from junction to ambient; informs board-level thermal design for sustained surge duty cycles. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals; identical clamping behavior in either direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| Glass passivated junction | Enhances long-term stability of VBR and leakage current under thermal and humidity stress. |
| Low profile SMA package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak without moisture sensitivity concerns. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting analog outputs and I/O pins of pressure, temperature, and position sensors in engine control units and ADAS modules. IC Role / Device Role: Bidirectional transient clamp placed across differential or single-ended signal lines upstream of ESD-sensitive ASICs. Use Value: Limits induced surges from load dump or inductive switching to ≤32.4 V, preserving sensor accuracy and preventing latch-up in downstream ADCs. |
Use Scenario: Safeguarding CAN_H and CAN_L lines against ESD and ISO 7637-2 pulse 1/2a/5a transients in vehicle body control modules. IC Role / Device Role: Line-to-line and line-to-ground TVS pair protecting differential bus nodes from ±30 kV contact ESD and 100 V load dump spikes. Use Value: Maintains CAN signal integrity by clamping transients within common-mode voltage tolerance while supporting >1 Mbps data rates due to low junction capacitance. |
| Consumer USB Port Protection | Power Supply Input Stage |
Use Scenario: Secondary-level surge suppression on USB 2.0 D+/D− lines in docking stations and portable chargers exposed to user-handling ESD. IC Role / Device Role: Bidirectional TVS placed immediately after connector to shunt fast transients before reaching USB transceiver ICs. Use Value: Achieves <1 ns response with <100 nA leakage at 20 V, ensuring no signal degradation while meeting IEC 61000-4-2 Level 4 (±15 kV air). |
Use Scenario: Input rail protection for 24 V industrial power supplies subjected to lightning-induced surges on AC/DC front-ends or DC distribution lines. IC Role / Device Role: Parallel-connected TVS across bulk input capacitor to absorb repetitive 500 W transients without thermal runaway. Use Value: Withstands ≥1000 surges at rated PPPM when mounted on 5.0 mm × 5.0 mm copper pads, extending system uptime in factory automation settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J20CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; same thermal and clamping performance. | No functional difference; selected where halogen-free material compliance is mandated by OEM environmental policy. | Direct substitution if halogen-free content is required; no layout or validation changes needed. |
| SMCJ20CAHE3/61 | Higher power rating (1500 W PPPM), larger SMC (DO-214AB) package; same VWM/VBR/VC but 45.4 A IPPM and RθJA = 35 °C/W. | Suitable for higher-energy threats (e.g., ISO 7637-2 Pulse 5b); requires larger PCB footprint and different pad layout. | Choose when system-level surge testing exceeds 500 W; not pin-compatible due to SMC package size and lead spacing. |
Compared with SMA5J20CAHE3/61, the M3 variant offers identical protection performance with halogen-free construction, while the SMCJ20CAHE3/61 delivers triple the surge energy handling in a physically larger package-making it suitable for harsher environments but requiring PCB redesign.
Availability
SMA5J20CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB port protection, and 24 V power supply input stages requiring stable component supply and AEC-Q101 assurance.
Supply support for SMA5J20CAHE3/61 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 and automotive-grade qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained automotive and industrial applications, combining AEC-Q101 compliance with industry-standard DO-214AC packaging and robust surge handling.
FAQ
What is the clamping voltage of the SMA5J20CAHE3/61 under maximum rated surge current?
The SMA5J20CAHE3/61 has a maximum clamping voltage (VC) of 32.4 V when subjected to its peak pulse current (IPPM) of 15.4 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during transient events. The SMA5J20CAHE3/61 maintains this clamping performance bidirectionally, making it suitable for symmetric signal line protection.
Is the SMA5J20CAHE3/61 suitable for automotive applications?
Yes, the SMA5J20CAHE3/61 is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It undergoes rigorous stress testing-including temperature cycling, highly accelerated life testing (HALT), and mechanical shock-to ensure reliability in under-hood and cabin environments. The SMA5J20CAHE3/61 is commonly deployed in engine control units, body electronics, and ADAS sensor modules where transient immunity is critical.
Does the SMA5J20CAHE3/61 have polarity markings?
No, the SMA5J20CAHE3/61 does not feature polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMA5J20A), which use a cathode band to indicate terminal polarity, the SMA5J20CAHE3/61 exhibits identical electrical behavior in both directions. This symmetry eliminates orientation constraints during PCB assembly and simplifies layout for differential or AC-coupled signal paths.
What is the thermal resistance of the SMA5J20CAHE3/61, and how does it affect layout?
The SMA5J20CAHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value directly impacts sustained surge capability: higher ambient temperatures or reduced copper area increase junction temperature, requiring derating per Figure 2 in the datasheet. To maintain reliability, PCB layout must adhere to the specified pad dimensions and avoid thermal isolation of the SMA5J20CAHE3/61 terminals.
How does the SMA5J20CAHE3/61 compare to unidirectional versions like SMA5J20AHE3/61?
The SMA5J20CAHE3/61 differs from SMA5J20AHE3/61 primarily in polarity behavior: the "CA" suffix denotes bidirectional operation, while "A" indicates unidirectional. Both share identical VWM (20 V), VBR (22.2–24.5 V), VC (32.4 V), and PPPM (500 W), but only the unidirectional version supports forward conduction and specifies IFSM (40 A). The SMA5J20CAHE3/61 is preferred for AC signals, differential buses, or any application requiring symmetrical clamping without DC bias constraints.
SMA5J20CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMA5J20CAHE3/61 FAQ
1.How can I place an order for SMA5J20CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J20CAHE3/61 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 SMA5J20CAHE3/61 reliable?
The price and inventory of SMA5J20CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J20CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J20CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J20CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J20CAHE3/61?
SMA5J20CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J20CAHE3/61 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 SMA5J20CAHE3/61?
For technical support, including SMA5J20CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J20CAHE3/61 requirements.
6.How does Aetrix verify that SMA5J20CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J20CAHE3/61 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 SMA5J20CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J20CAHE3/61?
All SMA5J20CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J20CAHE3/61, 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 SMA5J20CAHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J20CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J20CAHE3/61 Tags
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