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Vishay General Semiconductor - Diodes Division SMA5J8.5CAHM3/H
- Part No.:
- SMA5J8.5CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5CAHM3/H.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,397
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Product details
Overview
SMA5J8.5CAHM3/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 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR), 14.4 V clamping voltage (VC) at 10 A peak pulse current, and 500 W peak pulse power rating - used to safeguard automotive sensor interfaces, industrial I/O ports, and telecom line drivers against ESD and lightning-induced transients.
For engineers reviewing the SMA5J8.5CAHM3/H datasheet, SMA5J8.5CAHM3/H pinout, SMA5J8.5CAHM3/H application, or SMA5J8.5CAHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), junction temperature range (–55 to +150 °C), and halogen-free RoHS-compliant construction per ordering code HM3.
Technical Context
This bidirectional TVS operates symmetrically in both polarities with identical VBR, VC, and leakage characteristics. Its glass-passivated junction ensures stable clamping under repetitive 10/1000 μs surges, while low incremental surge resistance enables effective energy diversion without thermal runaway.
The device meets MSL level 1 per J-STD-020 (260 °C peak reflow), supports automated SMT placement, and is qualified to AEC-Q101 for automotive use - confirmed by HM3 suffix and "HM3_A/H" revision marking. Polarity is unmarked, consistent with bidirectional functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before clamping begins; sets safe margin below circuit operating voltage. |
| VBR min/max | 9.44 V / 10.4 V at 1 mA test current - defines guaranteed breakdown threshold for reliable surge initiation. |
| VC @ IPPM | 14.4 V at 10 A (10/1000 μs) - peak clamped voltage seen by protected IC; limits stress on downstream components. |
| PPPM | 500 W - maximum non-repetitive surge power dissipation; determines survivability of lightning or inductive-switching events. |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage at stand-off voltage; avoids signal integrity degradation in high-impedance circuits. |
| TJ range | –55 °C to +150 °C - full automotive-grade junction temperature operation; supports under-hood and industrial environments. |
| RθJA | 80 °C/W - thermal resistance from junction to ambient on standard 5 mm × 5 mm copper pads; informs PCB thermal design. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Bidirectional configuration - no polarity marking on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction when VWM exceeded. |
| Case (cathode band absent) | Non-polarized terminal | No marking confirms bidirectional operation; eliminates orientation errors during automated placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity constraints. |
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control units and ADAS sensor interfaces. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced failure; no baking required pre-assembly. |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime, even under thermal cycling and humidity stress. |
| Low Rsurge | Minimizes voltage overshoot during fast transients (e.g., ESD), improving protection effectiveness for sensitive ICs. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ESD in vehicle body control modules. IC Role / Device Role: Bidirectional voltage clamp placed across differential bus lines to limit transient excursions. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 1/2/5a while meeting AEC-Q101 requirements. |
Use Scenario: Safeguarding 24 V PLC analog input channels against field-wiring surges and ground-bounce events. IC Role / Device Role: Primary front-end TVS on signal conditioning stage before ADC or isolation barrier. Use Value: Clamps 500 W surges to ≤14.4 V, preventing damage to op-amps and precision references. |
| Telecom Line Driver Protection | Consumer USB Interface Protection |
Use Scenario: Shielding RS-485 transceivers in base station remote units from induced lightning surges on long cable runs. IC Role / Device Role: Differential-mode TVS across A/B lines to suppress common-mode and differential transients. Use Value: Symmetrical clamping ensures balanced line protection without skew or DC offset introduction. |
Use Scenario: Guarding USB 2.0 D+/D− lines in smart home hubs against human-body-model ESD events. IC Role / Device Role: Low-capacitance bidirectional suppressor placed immediately at connector entry point. Use Value: Sub-1 μA leakage preserves signal rise time; 14.4 V clamping prevents PHY latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5CAHE3/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Acceptable where halogen-free requirement is not mandated (e.g., non-automotive industrial). | Select SMA5J8.5CAHE3/H if halogen content is unrestricted and cost optimization is prioritized. |
| SMA6J8.5CAHM3/H | 600 W PPPM rating (vs. 500 W); otherwise identical VWM, VBR, VC, and package. | Preferred for higher-energy threat environments (e.g., 48 V industrial power rails, heavy-duty motor controls). | Choose SMA6J8.5CAHM3/H when system-level surge testing exceeds IEC 61000-4-5 Level 4 (4 kV line-earth). |
Compared with SMA5J8.5CAHE3/H, the SMA5J8.5CAHM3/H adds halogen-free compliance without sacrificing performance; versus SMA6J8.5CAHM3/H, it trades 100 W surge headroom for tighter board space and lower cost in moderate-threat applications.
Availability
SMA5J8.5CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial programmable logic controllers, and telecom line driver circuits requiring stable component supply with AEC-Q101 validation and halogen-free compliance.
Supply support for SMA5J8.5CAHM3/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 and automotive qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained SMT designs, targeting automotive, industrial, and telecom systems where robustness and AEC-Q101 compliance are mandatory.
FAQ
What does the 'HM3' suffix indicate in SMA5J8.5CAHM3/H?
The 'HM3' suffix in SMA5J8.5CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JEDEC J-STD-20 and JESD201 Class 2 whisker resistance, and qualifies the device for automotive under-hood applications per the HM3 ordering code defined in Vishay's documentation.
Is SMA5J8.5CAHM3/H unidirectional or bidirectional?
SMA5J8.5CAHM3/H is a bidirectional TVS diode, as indicated by the 'CA' suffix in its part number. It provides symmetrical clamping in both polarities with identical VBR, VC, and leakage characteristics - confirmed in the Electrical Characteristics table and explicitly stated in the "DEVICES FOR BIDIRECTION APPLICATIONS" section of the datasheet.
What is the clamping voltage of SMA5J8.5CAHM3/H at rated surge current?
The clamping voltage of SMA5J8.5CAHM3/H is 14.4 V measured at 10 A peak pulse current using a 10/1000 μs waveform. This value is specified in the Electrical Characteristics table and represents the maximum voltage imposed on protected circuitry during a standardized surge event.
Does SMA5J8.5CAHM3/H require orientation during PCB placement?
No, SMA5J8.5CAHM3/H does not require orientation during PCB placement because it is a bidirectional device with no polarity marking - consistent with the "no marking on bidirectional types" statement in the Mechanical Data section. The SMA (DO-214AC) package has symmetrical terminals and functions identically regardless of mounting direction.
What is the maximum junction temperature rating for SMA5J8.5CAHM3/H?
The maximum junction temperature rating for SMA5J8.5CAHM3/H is +150 °C, and the full operating junction and storage temperature range is –55 °C to +150 °C. This rating is specified in the Maximum Ratings table and supports use in under-hood automotive and high-ambient industrial environments.
SMA5J8.5CAHM3/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for SMA5J8.5CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5CAHM3/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/H reliable?
The price and inventory of SMA5J8.5CAHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMA5J8.5CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5CAHM3/H?
SMA5J8.5CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5CAHM3/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/H?
For technical support, including SMA5J8.5CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5CAHM3/H requirements.
6.How does Aetrix verify that SMA5J8.5CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5CAHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMA5J8.5CAHM3/H?
All SMA5J8.5CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5CAHM3/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/H part is unused and in its original packaging.
Return procedure for SMA5J8.5CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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