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Vishay General Semiconductor - Diodes Division SMBJ8.5CAHM3_A/H
- Part No.:
- SMBJ8.5CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.5CAHM3_A/H.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ8.5CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients 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, 14.4 V maximum clamping voltage (VC) at 41.7 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ8.5CAHM3_A/H datasheet, SMBJ8.5CAHM3_A/H pinout, SMBJ8.5CAHM3_A/H application, or SMBJ8.5CAHM3_A/H equivalent, key selection considerations include bidirectional surge suppression capability, 150 °C max junction temperature, halogen-free RoHS-compliant construction (HM3 suffix), AEC-Q101 qualification readiness, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance enables rapid energy dissipation during ESD or lightning-induced surges.
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, supports 100 A non-repetitive forward surge (IFSM) in unidirectional mode, and exhibits a +0.073 %/°C temperature coefficient of VBR - critical for thermal stability in automotive and industrial ambient conditions.
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 IT = 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 14.4 V at 41.7 A - Clamped voltage seen by protected circuit under 10/1000 µs surge; defines worst-case stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling capacity with 0.01 % duty cycle; validates robustness against repetitive transients. |
| IPPM | 41.7 A - Maximum non-repetitive surge current the device safely diverts without degradation. |
| TJ max | +150 °C - Maximum junction temperature enabling operation in high-ambient environments like motor drives or base stations. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with JEDEC MS-012. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function as anode and cathode depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on applied voltage polarity; no fixed polarity marking required. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line pair (e.g., differential signal or power/return). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - e.g., RS-485, CAN, USB D+/D−. |
| 600 W peak pulse power | Handles high-energy transients from inductive switching or lightning surges in industrial control cabinets and telecom infrastructure. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for export and end-of-life processing; qualified per JESD201 Class 2 whisker test. |
| AEC-Q101 qualification ready | Base HM3 suffix supports automotive-grade reliability validation; suitable for infotainment, body electronics, and ADAS sensor interfaces. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow profile - eliminates baking requirements and simplifies SMT manufacturing. |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protecting gate drivers and feedback signal lines from voltage spikes caused by IGBT switching noise and back-EMF in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional TVS placed across isolated signal paths (e.g., encoder A/B channels or current-sense amplifier inputs) to clamp ±1 kV transients. Use Value: Prevents latch-up or permanent damage to precision analog front-ends while maintaining signal integrity under repeated 600 W surge conditions. |
Use Scenario: Shielding LIN bus or analog sensor outputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between signal line and ground, leveraging 8.5 V VWM to avoid interference with 5 V or 3.3 V logic levels. Use Value: Ensures functional safety compliance by limiting clamped voltage to 14.4 V - well below IC absolute maximum ratings - during ISO 7637-2 Pulse 5a events. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
|
Use Scenario: Safeguarding -48 V DC power distribution circuits in base station remote radio units exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS deployed across input rails to absorb common-mode transients up to 600 W without polarity constraints. Use Value: Maintains uninterrupted operation during Category C (IEC 61000-4-5) 2 Ω/12 Ω coupling tests due to fast response time and low clamping ratio (VC/VBR ≈ 1.45). |
Use Scenario: Providing secondary-level surge immunity on USB-C CC and VBUS lines in portable docking stations subjected to ESD and hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <50 pF at 0 V) placed inline with high-speed data lanes to minimize signal distortion while meeting IEC 61000-4-2 Level 4. Use Value: Enables robust 8 kV contact / 15 kV air discharge ESD protection without degrading USB 2.0 signal rise time or insertion loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CAHE3_A/H | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free certification; no AEC-Q101 qualification path. | Preferred for cost-sensitive consumer electronics where halogen-free requirement is not mandated. | Select when halogen-free compliance is not required and AEC-Q101 validation is unnecessary. |
| SMAJ8.5CAHM3_A/H | Lower 400 W PPPM, same VWM/VC; SMA package (smaller footprint, higher thermal resistance). | Suitable for space-constrained designs with lower surge exposure, such as IoT edge nodes or wearables. | Choose only if system-level surge testing confirms 400 W rating suffices and PCB layout cannot accommodate SMB outline. |
Compared with SMBJ8.5CAHE3_A/H, the SMBJ8.5CAHM3_A/H adds halogen-free compliance and AEC-Q101 qualification readiness; versus SMAJ8.5CAHM3_A/H, it delivers 50 % higher surge power handling and superior thermal performance via larger SMB package - making it optimal for industrial and automotive front-end protection.
Availability
SMBJ8.5CAHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and consumer USB-C port protection requiring stable component supply across production lifecycles.
Supply support for SMBJ8.5CAHM3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for robust clamping, low leakage, and seamless integration into automotive, industrial, and telecom power/signal protection schemes.
FAQ
What is the clamping voltage of SMBJ8.5CAHM3_A/H at its rated peak pulse current?
The SMBJ8.5CAHM3_A/H has a maximum clamping voltage (VC) of 14.4 V at its rated peak pulse current (IPPM) of 41.7 A using a 10/1000 µs waveform. This value represents the upper limit of voltage imposed on the protected circuit during a standardized surge event, ensuring downstream components remain within safe operating limits. The SMBJ8.5CAHM3_A/H achieves this with minimal overshoot and stable response due to its glass-passivated junction.
Is SMBJ8.5CAHM3_A/H suitable for automotive applications?
Yes, SMBJ8.5CAHM3_A/H carries the HM3 suffix indicating halogen-free, RoHS-compliant construction and AEC-Q101 qualification readiness. While final AEC-Q101 certification requires customer-specific testing, the base device meets all prerequisite material, process, and reliability criteria defined in the standard - making SMBJ8.5CAHM3_A/H appropriate for automotive body electronics, infotainment systems, and sensor interface protection where transient immunity is critical.
How does the bidirectional design of SMBJ8.5CAHM3_A/H affect its circuit placement?
The bidirectional design of SMBJ8.5CAHM3_A/H eliminates polarity constraints during PCB layout - it can be placed across any two points requiring symmetrical overvoltage protection, such as differential signal pairs (RS-485, CAN), AC-coupled lines, or floating power domains. Unlike unidirectional TVS diodes, SMBJ8.5CAHM3_A/H requires no orientation verification during assembly, reducing SMT error risk and simplifying design reuse across multiple interface types.
What is the thermal resistance of SMBJ8.5CAHM3_A/H, and how does it impact power derating?
SMBJ8.5CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. This value directly governs power derating above 25 °C ambient: for example, at 85 °C board temperature, its 5.0 W steady-state power dissipation drops to ~3.0 W. Engineers must apply this derating curve (per Fig. 2 in Vishay Doc. 88392) to ensure long-term reliability under sustained surge repetition.
Does SMBJ8.5CAHM3_A/H meet industry-standard surge immunity tests?
Yes, SMBJ8.5CAHM3_A/H is engineered to meet IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) requirements when properly implemented with appropriate PCB layout. Its 600 W peak pulse power rating corresponds to Level 4 (4 kV line-to-earth, 2 kV line-to-line) surge testing per IEC 61000-4-5 with 2 Ω source impedance. The SMBJ8.5CAHM3_A/H's fast response time and low clamping ratio ensure effective protection without compromising signal fidelity.
SMBJ8.5CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 41.7A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ8.5CAHM3_A/H FAQ
1.How can I place an order for SMBJ8.5CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.5CAHM3_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 SMBJ8.5CAHM3_A/H reliable?
The price and inventory of SMBJ8.5CAHM3_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 SMBJ8.5CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ8.5CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.5CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.5CAHM3_A/H?
SMBJ8.5CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.5CAHM3_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 SMBJ8.5CAHM3_A/H?
For technical support, including SMBJ8.5CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.5CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ8.5CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ8.5CAHM3_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 SMBJ8.5CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ8.5CAHM3_A/H?
All SMBJ8.5CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.5CAHM3_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 SMBJ8.5CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ8.5CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.5CAHM3_A/H Tags
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