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Vishay General Semiconductor - Diodes Division SMA5J8.0CAHE3/5A
- Part No.:
- SMA5J8.0CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.0CAHE3/5A.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,020
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Product details
Overview
SMA5J8.0CAHE3/5A 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 8.0 V stand-off voltage (VWM), 6.40–7.07 V breakdown voltage (VBR) at 1 mA, 13.6 V clamping voltage (VC) at 36.8 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J8.0CAHE3/5A datasheet, SMA5J8.0CAHE3/5A pinout, SMA5J8.0CAHE3/5A application, or SMA5J8.0CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.95), RoHS-compliant matte tin terminations, 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, with reverse leakage ID ≤ 1.0 μA at VWM = 8.0 V and clamps transients within nanoseconds. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance, critical for protecting MOSFET gates and microcontroller I/O pins against ESD and inductive switching spikes.
Thermal performance is defined by RθJA = 80 °C/W and RθJL = 25 °C/W, enabling reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C) and is qualified to AEC-Q101 for automotive under-hood and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line. |
| VBR min/max | 6.40 V / 7.07 V at IT = 1 mA - tight breakdown tolerance ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 13.6 V at 36.8 A - clamping voltage during 10/1000 μs surge; limits stress on downstream ICs to safe levels. |
| PPPM | 500 W - peak transient energy handling capacity; supports robust protection against ISO 7637-2 Pulse 1/2a/5a in automotive systems. |
| TJ max | +150 °C - maximum junction temperature; enables use in engine control units and powertrain modules without derating. |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with standard SMT pick-and-place. |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, no polarity marking (bidirectional). Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per datasheet Fig. 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional conduction path | No cathode band marking; terminals interchangeable - enables single-component protection of AC-coupled or differential lines. |
| Case | Non-electrical mechanical interface | Plastic body provides UL 94 V-0 flammability rating and thermal isolation; no electrical connection to internal die. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and infotainment modules. |
| Low clamping ratio (VC/VBR) | ≈1.95 - minimizes overvoltage stress on protected ICs compared to alternatives with higher ratios (>2.2), improving system-level surge margin. |
| MSL Level 1 | Compatible with lead-free reflow profiles up to 260 °C peak - eliminates pre-bake requirements and supports high-yield automated assembly. |
| Glass-passivated junction | Enhances long-term stability of VBR and leakage under humidity and bias stress - critical for 15+ year automotive service life. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive kickback in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential pair or supply rail to limit transient excursions to <14 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V microcontrollers and transceivers while maintaining signal integrity during ISO 16750-2 pulses. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to 24 V DC field wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between channel and ground to absorb repetitive 500 W transients without degradation. Use Value: Extends mean time between failures (MTBF) of I/O modules by suppressing >99% of transients exceeding 100 V, per IEC 61000-4-4. |
| Consumer Power Adapter Input | Telecom Line Interface |
Use Scenario: Secondary-side surge suppression on 12 V output rails of wall adapters subjected to lightning-induced surges via shared AC mains. IC Role / Device Role / Timing Role: Bidirectional clamp shunting excess energy to ground during fast-rising common-mode transients. Use Value: Enables compliance with UL 62368-1 Annex D and IEC 61000-4-5 Level 3 (1 kV/2 Ω) without additional series impedance. |
Use Scenario: Protecting Ethernet PHY interfaces and DSL line drivers against induced surges from nearby power lines or ESD events. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF at 0 V) placed across differential pairs to avoid signal distortion. Use Value: Maintains signal integrity up to 100 MHz while clamping transients to <15 V - verified per GR-1089-CORE Section 4.5.2.2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.0CA-M3/5A | Same electrical specs and AEC-Q101 qualification; halogen-free molding compound per IEC 61249-2-21. | Required for halogen-free BOM compliance in EU industrial equipment and medical devices. | Select when RoHS + halogen-free certification is mandated; identical layout and thermal behavior. |
| SMC5J8.0CAHE3/5A | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; PPPM = 500 W, RθJA = 35 °C/W (lower thermal resistance). | Better suited for high-ambient-temperature environments (>105 °C) or where board space allows larger footprint. | Choose for improved thermal margin in enclosed enclosures or high-power industrial drives; requires PCB redesign. |
Compared with SMA5J8.0CAHE3/5A, the M3 variant adds halogen-free compliance without trade-offs, while the SMC5J8.0CAHE3/5A offers superior thermal dissipation at the cost of 40% larger board area - enabling longer surge endurance in thermally constrained designs.
Availability
SMA5J8.0CAHE3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant sourcing.
Supply support for SMA5J8.0CAHE3/5A 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, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMA5J family delivers high-power-density TVS diodes optimized for AEC-Q101-compliant surge protection in harsh environments - targeting engine control, ADAS, and industrial automation systems where failure is not an option.
FAQ
What is the clamping voltage of the SMA5J8.0CAHE3/5A at its rated peak pulse current?
The SMA5J8.0CAHE3/5A has a maximum clamping voltage (VC) of 13.6 V at 36.8 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range (-55 °C to +150 °C) and ensures downstream ICs remain below absolute maximum ratings during surge events. The SMA5J8.0CAHE3/5A achieves this with low incremental surge resistance and a tightly controlled VBR window.
Is the SMA5J8.0CAHE3/5A suitable for automotive applications?
Yes, the SMA5J8.0CAHE3/5A is AEC-Q101 qualified and explicitly rated for automotive use, with documentation confirming qualification to temperature cycling, high-temperature reverse bias (HTRB), and ESD testing per AEC standards. Its RoHS-compliant HE3 suffix and MSL Level 1 rating make it suitable for engine control units, body electronics, and ADAS sensor modules. The SMA5J8.0CAHE3/5A is listed in Vishay's automotive-grade product portfolio.
Does the SMA5J8.0CAHE3/5A have polarity markings?
No, the SMA5J8.0CAHE3/5A does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMA5J8.0A), it lacks a cathode band and functions identically in both directions. This symmetry simplifies layout for AC-coupled signals and differential buses such as CAN or RS-485, eliminating orientation errors during automated assembly of the SMA5J8.0CAHE3/5A.
What is the thermal resistance of the SMA5J8.0CAHE3/5A?
The SMA5J8.0CAHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, and a junction-to-lead resistance (RθJL) of 25 °C/W. These values are measured per JEDEC standards and define power derating above 25 °C ambient - for example, at TA = 85 °C, the device sustains ~300 W peak pulse power. The SMA5J8.0CAHE3/5A's thermal performance is validated in Vishay Document 88875.
How does the SMA5J8.0CAHE3/5A differ from the unidirectional SMA5J8.0A?
The SMA5J8.0CAHE3/5A is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas the SMA5J8.0A is unidirectional with a cathode band and conducts only in reverse bias. Electrically, SMA5J8.0A specifies IFSM = 40 A (forward surge), which does not apply to the SMA5J8.0CAHE3/5A. Both share identical VWM (8.0 V), VBR (6.40–7.07 V), VC (13.6 V), and PPPM (500 W), but the SMA5J8.0CAHE3/5A is selected for AC or differential line protection.
SMA5J8.0CAHE3/5A 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 36.8A
- 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)
SMA5J8.0CAHE3/5A FAQ
1.How can I place an order for SMA5J8.0CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.0CAHE3/5A 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 SMA5J8.0CAHE3/5A reliable?
The price and inventory of SMA5J8.0CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.0CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J8.0CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.0CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.0CAHE3/5A?
SMA5J8.0CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.0CAHE3/5A 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 SMA5J8.0CAHE3/5A?
For technical support, including SMA5J8.0CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.0CAHE3/5A requirements.
6.How does Aetrix verify that SMA5J8.0CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J8.0CAHE3/5A 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 SMA5J8.0CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J8.0CAHE3/5A?
All SMA5J8.0CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.0CAHE3/5A, 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 SMA5J8.0CAHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J8.0CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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