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Vishay General Semiconductor - Diodes Division SMA5J8.5CAHM3_A/I
- Part No.:
- SMA5J8.5CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5CAHM3_A/I.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,303
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Product details
Overview
SMA5J8.5CAHM3_A/I 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 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), clamping voltage of 14.4 V at 34.7 A IPPM, and operates from –55 °C to +150 °C junction temperature - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J8.5CAHM3_A/I datasheet, SMA5J8.5CAHM3_A/I pinout, SMA5J8.5CAHM3_A/I application, or SMA5J8.5CAHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), bidirectional clamping behavior, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This device uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes. Its bidirectional symmetry ensures identical clamping performance in both polarities without polarity marking.
Rated for 500 W peak pulse power under standardized 10/1000 µs waveform, it sustains repetitive surges when mounted on 5.0 mm × 5.0 mm copper pads and derates linearly above 25 °C ambient per Fig. 2. The 14.4 V clamping voltage at 34.7 A IPPM provides predictable overvoltage limiting for downstream ICs such as CAN transceivers and microcontroller GPIOs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before conduction begins; defines safe working range for protected line. |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - guaranteed breakdown threshold window ensuring consistent turn-on across production lots. |
| VC @ IPPM | 14.4 V at 34.7 A - clamped voltage during full-rated surge; determines maximum stress imposed on downstream circuitry. |
| PPPM | 500 W (10/1000 µs) - energy-handling capacity defining robustness against common surge waveforms per IEC 61000-4-5. |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments and sealed industrial enclosures. |
| RθJA | 80 °C/W - thermal resistance from junction to ambient; informs required PCB copper area for sustained surge duty cycles. |
| Leakage ID | 1.0 µA at VWM - ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified (HM3 suffix), matte tin-plated leads solderable per J-STD-002 and JESD22-B102. No polarity marking - bidirectional operation confirmed.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical bidirectional clamping; either terminal serves as input/output - no orientation dependency in layout. |
| Case (body) | Thermal and mechanical interface | DO-214AC outline with 5.0 mm × 5.0 mm minimum pad requirement for thermal dissipation and mechanical reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables compact placement near connectors and ICs without height interference in slim enclosures or stacked PCBs. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure per J-STD-020 MSL Level 1. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensor interfaces, and body electronics. |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive OEM material compliance requirements and supports environmentally regulated manufacturing programs. |
| Fast response time | Sub-nanosecond turn-on limits voltage overshoot during ESD events (IEC 61000-4-2) and fast-switching transients. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., temperature, pressure) from load dump and alternator ripple in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor line and ground, absorbing ±100 V transients without forward conduction. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V ADC inputs and op-amps while maintaining <1 µA leakage at 8.5 V nominal rail. |
Use Scenario: Shielding PLC digital input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary surge shunt on 24 V DC input lines upstream of optocoupler isolation stage. Use Value: Clamps 500 W surges to ≤14.4 V, preserving optocoupler CTR and enabling reliable detection of 10–30 V logic thresholds. |
| Telecom Line Interface | Consumer USB/Type-C Port |
Use Scenario: Safeguarding RS-485 transceiver pins against lightning-induced surges in outdoor telecom node enclosures. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per line) referenced to local ground, handling common-mode transients up to ±1 kV. Use Value: Maintains signal integrity below 10 pF capacitance at VWM, avoiding data rate degradation on 10 Mbps+ links. |
Use Scenario: ESD protection for USB 2.0 D+/D− lines and VBUS in portable audio/video devices. IC Role / Device Role / Timing Role: Secondary-level TVS after primary polymer PTC, clamping contact ESD (±15 kV) and cable discharge events. Use Value: 14.4 V clamping prevents USB PHY damage while meeting IEC 61000-4-2 Level 4 without compromising eye diagram margin. |
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/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks JESD201 Class 2 whisker rating. | Approved for commercial-grade automotive modules where halogen-free mandate is not enforced. | Select when cost sensitivity outweighs halogen-free requirement and whisker resistance is non-critical. |
| SMA6J8.5CAHM3_A/I | 600 W PPPM rating (vs. 500 W); same VWM/VBR/VC; larger SMA package footprint (DO-214AB). | Used where higher surge margin is needed (e.g., battery input rails), but requires PCB layout change. | Choose only if system-level surge testing exceeds 500 W and board space allows DO-214AB mounting. |
Compared with SMA5J8.5CAHM3_A/I, the HE3 variant trades halogen-free compliance and whisker resistance for lower cost, while the SMA6J8.5CAHM3_A/I offers +20 % surge headroom at the expense of package size and layout compatibility.
Availability
SMA5J8.5CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface designs requiring stable component supply, AEC-Q101 qualification, and halogen-free compliance.
Supply support for SMA5J8.5CAHM3_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, power density, and automotive-grade validation.
The SMA5J series targets high-power-density transient suppression in space-constrained applications, with design focus on automotive, industrial, and telecom systems needing robust, AEC-Q101-qualified TVS solutions in standard surface-mount packages.
FAQ
What is the polarity configuration of SMA5J8.5CAHM3_A/I?
The SMA5J8.5CAHM3_A/I is a bidirectional TVS diode with symmetrical anode/cathode terminals and no polarity marking. Its electrical characteristics apply identically in both directions, making it suitable for AC-coupled lines, differential buses like RS-485, and ungrounded signal paths where voltage reversal occurs. This eliminates orientation errors during automated placement.
Does SMA5J8.5CAHM3_A/I meet AEC-Q101 requirements?
Yes, SMA5J8.5CAHM3_A/I is AEC-Q101 qualified, as indicated by the "HM3" suffix and documented in Vishay's official qualification reports. It undergoes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating its suitability for automotive powertrain, chassis, and body electronics applications.
What is the maximum clamping voltage for SMA5J8.5CAHM3_A/I under rated surge conditions?
The maximum clamping voltage (VC) for SMA5J8.5CAHM3_A/I is 14.4 V at 34.7 A peak pulse current (IPPM), measured under standardized 10/1000 µs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during full-rated transient events and is critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the HM3 suffix affect the material composition of SMA5J8.5CAHM3_A/I?
The HM3 suffix denotes that SMA5J8.5CAHM3_A/I is halogen-free, RoHS-compliant, and meets JESD201 Class 2 whisker resistance requirements. Its molding compound contains no brominated flame retardants or chlorine-based additives, and its matte tin-plated leads prevent tin whisker growth - fulfilling strict automotive and industrial environmental mandates.
Can SMA5J8.5CAHM3_A/I be used in place of unidirectional TVS diodes?
No - SMA5J8.5CAHM3_A/I is strictly bidirectional and must not replace unidirectional types (e.g., SMA5J8.5A) in DC-biased circuits where forward conduction would cause short-circuit failure. Its symmetrical IV curve allows conduction in both directions, making it unsuitable for protecting single-polarity power rails without additional blocking components.
SMA5J8.5CAHM3_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):
- 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/I FAQ
1.How can I place an order for SMA5J8.5CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5CAHM3_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 SMA5J8.5CAHM3_A/I reliable?
The price and inventory of SMA5J8.5CAHM3_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 SMA5J8.5CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J8.5CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5CAHM3_A/I?
SMA5J8.5CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5CAHM3_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 SMA5J8.5CAHM3_A/I?
For technical support, including SMA5J8.5CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5CAHM3_A/I requirements.
6.How does Aetrix verify that SMA5J8.5CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5CAHM3_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 SMA5J8.5CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J8.5CAHM3_A/I?
All SMA5J8.5CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5CAHM3_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 SMA5J8.5CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMA5J8.5CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J8.5CAHM3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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