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Vishay General Semiconductor - Diodes Division SMA5J8.5CAHM3_A/H
- Part No.:
- SMA5J8.5CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5CAHM3_A/H.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,668
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Product details
Overview
SMA5J8.5CAHM3_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 or power lines. It features 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR), 14.4 V maximum clamping voltage (VC) at 10 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform. Used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J8.5CAHM3_A/H datasheet, SMA5J8.5CAHM3_A/H pinout, SMA5J8.5CAHM3_A/H application, or SMA5J8.5CAHM3_A/H equivalent, key selection criteria include bidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and thermal resistance of 25 °C/W junction-to-lead - critical for high-reliability 12 V rail protection in constrained layouts.
Technical Context
This device operates as a voltage-clamping surge protector with symmetrical reverse/forward conduction characteristics due to its bidirectional construction. It delivers sub-nanosecond response time and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
Rated for -55 °C to +150 °C junction temperature range and qualified to AEC-Q101, the SMA5J8.5CAHM3_A/H supports automotive-grade reliability. Its glass-passivated junction and MSL Level 1 moisture sensitivity rating ensure robustness during reflow soldering and long-term field operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for 12 V system signal line protection. |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - Confirmed breakdown range ensures predictable turn-on across process variation and temperature. |
| VC @ IPPM | 14.4 V at 10 A - Clamping voltage limits downstream IC stress during 500 W transient events per 10/1000 µs standard. |
| PPPM | 500 W - Peak pulse power handling capacity defines survivability against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges. |
| IPPM | 10 A - Peak pulse current rating directly correlates to surge energy absorption (W × s) under standardized waveform conditions. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating. |
| RθJL | 25 °C/W - Low junction-to-lead thermal resistance supports sustained power dissipation when mounted on minimum copper pads. |
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 compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No designated anode/cathode; identical clamping behavior in both directions - simplifies PCB layout and eliminates orientation errors. |
| Case | Non-electrical mechanical interface | Plastic body provides UL 94 V-0 flammability rating and thermal isolation; no electrical connection or heat sinking function. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term leakage stability over temperature and life cycles. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment power rails. |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and enables use in green manufacturing programs without material declaration exceptions. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without baking or special handling prior to assembly. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Limits induced voltage to ≤14.4 V during 10 A surge, preserving integrity of 3.3 V/5 V microcontrollers and ADC front-ends. | Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring surges and ground loop transients. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor installed between terminal block and optocoupler/isolator input stage. Use Value: Withstands repeated 500 W pulses without degradation, extending maintenance intervals in factory automation systems. |
| Consumer Power Adapter Interface | Telecom Line Card Surge Suppression |
Use Scenario: Input-stage protection for AC/DC adapters and USB-C PD chargers exposed to mains-borne surges and hot-plug events. IC Role / Device Role / Timing Role: Primary-level TVS on DC output rail to clamp overvoltage from regulator failure or feedback loop loss. Use Value: Fast response (<1 ns) prevents latch-up in downstream DC-DC converters rated for ≤15 V absolute maximum input. | Use Scenario: Secondary-side protection on Ethernet PHY or xDSL line driver circuits subject to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional suppressor bridging differential pair to chassis ground to equalize transient potential. Use Value: Symmetrical clamping maintains signal integrity on full-duplex links while meeting GR-1089-CORE telecom immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5CAHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Restricted to commercial-grade industrial or consumer use; not approved for automotive under-hood deployment. | Select when halogen-free requirement is waived and automotive qualification is unnecessary. |
| SMBJ8.5CA | Same VWM/VC, but SMB (DO-214AA) package - 5.3 mm × 4.1 mm footprint, 30% larger area than SMA. | Lower power density; requires more PCB space; thermal resistance RθJA ~100 °C/W vs. 80 °C/W for SMA5J series. | Choose only if existing layout accommodates SMB size or higher surge margin (600 W) is needed. |
Compared with SMA5J8.5CAHE3_A/H and SMBJ8.5CA, the SMA5J8.5CAHM3_A/H uniquely combines halogen-free materials, AEC-Q101 qualification, and SMA package density - making it the sole option for space-constrained, automotive-qualified 8.5 V bidirectional TVS protection.
Availability
SMA5J8.5CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card designs requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMA5J8.5CAHM3_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 qualification.
The SMA5J series is engineered for high-energy transient suppression in compact surface-mount formats, targeting automotive, industrial, and communications systems where board space, thermal performance, and AEC-Q101 compliance are mandatory.
FAQ
What does the 'HM3' suffix indicate in SMA5J8.5CAHM3_A/H?
The 'HM3' suffix in SMA5J8.5CAHM3_A/H denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. It confirms compliance with automotive reliability standards, including temperature cycling, humidity testing, and mechanical shock - essential for under-hood and ADAS applications where SMA5J8.5CAHM3_A/H is deployed.
Is SMA5J8.5CAHM3_A/H unidirectional or bidirectional?
SMA5J8.5CAHM3_A/H is a bidirectional transient voltage suppressor, as indicated by the 'CA' in its part number. It provides symmetrical clamping in both polarities with identical VBR, VC, and IPPM characteristics - ideal for protecting AC-coupled or differential signal lines where polarity reversal may occur.
What is the maximum clamping voltage of SMA5J8.5CAHM3_A/H at rated peak pulse current?
The maximum clamping voltage (VC) of SMA5J8.5CAHM3_A/H is 14.4 V at 10 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is guaranteed across temperature and process variation, ensuring downstream ICs see no more than 14.4 V during surge events.
Does SMA5J8.5CAHM3_A/H require a heatsink for 500 W pulse handling?
No, SMA5J8.5CAHM3_A/H does not require an external heatsink for single-pulse 500 W events. Its RθJL of 25 °C/W and short-duration pulse nature allow safe operation when mounted on standard 0.2" × 0.2" copper pads. Continuous power dissipation remains limited by RθJA = 80 °C/W, but surge duty cycle is typically <0.1%.
How does SMA5J8.5CAHM3_A/H differ from SMA5J8.5A variants?
SMA5J8.5CAHM3_A/H is bidirectional (CA), while SMA5J8.5A is unidirectional. The HM3 suffix adds halogen-free and AEC-Q101 qualification - absent in base-E3/M3 versions. SMA5J8.5CAHM3_A/H also has no cathode band marking, unlike unidirectional SMA5J8.5A, simplifying automated placement verification.
SMA5J8.5CAHM3_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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 34.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J8.5CAHM3_A/H FAQ
1.How can I place an order for SMA5J8.5CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5CAHM3_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 SMA5J8.5CAHM3_A/H reliable?
The price and inventory of SMA5J8.5CAHM3_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 SMA5J8.5CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J8.5CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5CAHM3_A/H?
SMA5J8.5CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5CAHM3_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 SMA5J8.5CAHM3_A/H?
For technical support, including SMA5J8.5CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5CAHM3_A/H requirements.
6.How does Aetrix verify that SMA5J8.5CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5CAHM3_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 SMA5J8.5CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J8.5CAHM3_A/H?
All SMA5J8.5CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5CAHM3_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 SMA5J8.5CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMA5J8.5CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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