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Vishay General Semiconductor - Diodes Division SMA5J8.5AHM3/H
- Part No.:
- SMA5J8.5AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5AHM3/H.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,874
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Product details
Overview
SMA5J8.5AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V clamping voltage (VC) at 34.7 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect automotive ECUs, industrial I/O modules, and sensor interfaces against inductive switching transients.
For engineers reviewing the SMA5J8.5AHM3/H datasheet, SMA5J8.5AHM3/H pinout, SMA5J8.5AHM3/H application, or SMA5J8.5AHM3/H equivalent, key selection criteria include verified clamping performance under 34.7 A surge, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its specified VBR range (9.44–10.4 V). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD and lightning-induced surges per IEC 61000-4-2/4-5.
Designed for surface-mount use in space-constrained environments, it leverages glass-passivated junction technology and meets MSL level 1 (260 °C reflow peak), with operating junction temperature up to +150 °C and storage range from –55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 14.4 V at 34.7 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 500 W - peak pulse power handling capability under standardized surge waveform |
| RθJA | 80 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C |
| Package | SMA (DO-214AC) - industry-standard SMD outline with cathode band marking and 0.208" body length |
Pinout & Package
SMA (DO-214AC) package: surface-mount, molded plastic case with matte tin-plated leads, polarity indicated by cathode band on one end. Complies with UL 94 V-0 flammability rating and J-STD-002/JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); band denotes this end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for industrial and automotive production |
| Low profile SMA package | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment |
| Glass passivated junction | Improves long-term stability and moisture resistance versus epoxy-passivated alternatives |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Stage |
|---|---|
Use Scenario: Protects microcontroller GPIOs and CAN transceiver power pins from load-dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between supply rail and ground, absorbing energy before it reaches sensitive logic. Use Value: Limits clamped voltage to 14.4 V during 34.7 A surge, ensuring downstream components remain below absolute maximum ratings. | Use Scenario: Shields 24 V digital input circuitry from inductive kickback generated by solenoid and relay coils. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor mounted directly at connector entry point to minimize trace inductance. Use Value: Withstands repetitive 500 W surges without degradation, supporting >100,000 switching cycles in harsh factory environments. |
| Consumer Appliance Motor Drive Board | Telecom Remote Sensor Node |
Use Scenario: Guards MCU reset and communication lines on washing machine mainboard against motor commutation noise. IC Role / Device Role / Timing Role: Fast-response overvoltage protector located adjacent to connector interface to reduce parasitic inductance. Use Value: Sub-1 ns response time prevents latch-up in 3.3 V logic despite proximity to high-current motor drivers. | Use Scenario: Secures RS-485 data lines and power input of battery-powered environmental sensors deployed outdoors. IC Role / Device Role / Timing Role: Bidirectional-capable design variant not applicable; SMA5J8.5AHM3/H used for DC supply rail only due to unidirectional polarity. Use Value: 8.5 V VWM aligns precisely with 9 V nominal Li-ion battery systems, enabling optimal margin before clamping onset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5AHE3/H | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial-grade industrial controls where automotive qualification is unnecessary | Select when cost sensitivity outweighs halogen-free or automotive requirements |
| SMCJ8.5A-HF | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM/VBR/VC specs | Better suited for higher-energy surge environments where board space permits larger footprint | Choose when system-level surge testing requires >500 W margin or thermal mass improves reliability |
Compared with SMA5J8.5AHM3/H, SMA5J8.5AHE3/H offers identical electrical performance but omits halogen-free and AEC-Q101 compliance, while SMCJ8.5A-HF delivers triple the surge power in a physically larger package - making SMA5J8.5AHM3/H optimal for space-constrained, automotive-qualified, halogen-free designs.
Availability
SMA5J8.5AHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, and consumer appliance control boards requiring stable component supply with full traceability and lifecycle management.
Supply support for SMA5J8.5AHM3/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, efficiency, and application-specific optimization.
The SMA5J series is engineered for high-power-density transient suppression in automotive, industrial, and telecom infrastructure - delivering robust clamping performance in compact surface-mount packages with stringent qualification and environmental compliance.
FAQ
What is the clamping voltage of the SMA5J8.5AHM3/H under maximum rated surge current?
The SMA5J8.5AHM3/H has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current (IPPM) of 34.7 A using the 10/1000 µs waveform. This value is measured at the device terminals under standardized test conditions with 0.2" × 0.2" copper pads, ensuring predictable overvoltage limiting for downstream circuitry in the SMA5J8.5AHM3/H application.
Is the SMA5J8.5AHM3/H qualified for automotive use?
Yes, the SMA5J8.5AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, and AEC-Q101 qualified). This qualification covers stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD robustness - making the SMA5J8.5AHM3/H suitable for under-hood and body electronics in passenger vehicles and commercial fleets.
What does the "HM3" suffix indicate in SMA5J8.5AHM3/H?
The "HM3" suffix in SMA5J8.5AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from "E3" (RoHS only) and "HE3" (RoHS + AEC-Q101, not halogen-free). The "H" indicates halogen-free molding compound, "M3" confirms the AEC-Q101 grade and lead finish - all verified in Vishay document 88875 for the SMA5J8.5AHM3/H product family.
Can the SMA5J8.5AHM3/H be used in bidirectional configurations?
No, the SMA5J8.5AHM3/H is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SMA5J8.5CA). Using SMA5J8.5AHM3/H in reverse-biased AC applications would result in forward conduction and failure - always verify polarity alignment in the SMA5J8.5AHM3/H layout.
What is the thermal resistance and how does it affect derating of the SMA5J8.5AHM3/H?
The SMA5J8.5AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W. This means each watt of dissipated surge energy raises the junction temperature by 80 °C above ambient. Derating curves in Vishay doc 88875 show that at 85 °C ambient, the SMA5J8.5AHM3/H must be operated at ≤65 % of its 500 W rating - critical for sustained surge exposure in enclosed enclosures or high-temperature environments.
SMA5J8.5AHM3/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:
- 1
- Bidirectional Channels:
- -
- 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)
SMA5J8.5AHM3/H FAQ
1.How can I place an order for SMA5J8.5AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5AHM3/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 SMA5J8.5AHM3/H reliable?
The price and inventory of SMA5J8.5AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.5AHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J8.5AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5AHM3/H?
SMA5J8.5AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5AHM3/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 SMA5J8.5AHM3/H?
For technical support, including SMA5J8.5AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5AHM3/H requirements.
6.How does Aetrix verify that SMA5J8.5AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5AHM3/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 SMA5J8.5AHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J8.5AHM3/H?
All SMA5J8.5AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5AHM3/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 SMA5J8.5AHM3/H part is unused and in its original packaging.
Return procedure for SMA5J8.5AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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