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Vishay General Semiconductor - Diodes Division SMBG85CAHE3/52
- Part No.:
- SMBG85CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG85CAHE3/52.pdf
- Description:
- TVS DIODE 85VWM 137VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,147
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Product details
Overview
SMBG85CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal or power lines. It features 85 V stand-off voltage (VWM), 94.4–104 V breakdown voltage (VBR) at 1 mA, 137 V maximum clamping voltage (VC) at 4.4 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs waveform), suitable for automotive sensor line protection per AEC-Q101.
For engineers reviewing the SMBG85CAHE3/52 datasheet, SMBG85CAHE3/52 pinout, SMBG85CAHE3/52 application, or SMBG85CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 137 V VC at rated IPPM, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector in bidirectional configuration, with symmetrical avalanche breakdown behavior in both polarities. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 μA at VWM), while the low incremental surge resistance enables effective energy diversion during ESD or lightning-induced surges.
The SMBG85CAHE3/52 is thermally rated for TJ = –55 °C to +150 °C, with RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation under high ambient conditions when mounted per recommended pad layout. It meets UL 497B recognition (QVGQ2) and complies with JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 94.4 V / 104 V at IT = 1 mA - Ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 137 V at 4.4 A - Clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 600 W - Peak transient power handling capability under standardized waveform |
| ID @ VWM | <1.0 μA - Minimal leakage current preserves signal integrity in high-impedance circuits |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and industrial enclosures |
| MSL Level | Level 1 (260 °C peak reflow) - Supports standard lead-free SMT assembly without preconditioning |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 6.48 mm × 3.94 mm × 2.41 mm (L × W × H), matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts surge current during negative voltage excursions; symmetric with cathode |
| Cathode | Transient current entry (positive half-cycle) | Conducts surge current during positive voltage excursions; symmetric with anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control, ADAS sensors, and infotainment interfaces |
| 600 W peak pulse power | Withstands IEC 61000-4-5 surge events (line-to-line 1 kV, line-to-ground 2 kV) when properly laid out |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| UL 497B recognition (QVGQ2) | Meets safety agency requirements for telecom and industrial communication port protection |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine compartments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage clamping element placed directly at connector interface to shunt transients before reaching sensor signal conditioning circuitry. Use Value: Maintains signal fidelity by limiting clamped voltage to 137 V while surviving repetitive 600 W surges per AEC-Q101 stress profile. | Use Scenario: Safeguarding differential CAN_H/CAN_L lines against ESD (IEC 61000-4-2 ±25 kV air) and fast transient bursts in factory automation nodes. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair to clamp common-mode transients without disrupting DC bias or signal swing. Use Value: Symmetrical VBR (94.4–104 V) and low capacitance ensure minimal signal distortion while meeting ISO 11898-2 EMC immunity requirements. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Shielding RS-485/RS-422 transceivers in base station backhaul links exposed to induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at PCB edge connector, coordinated with upstream GDT or MOV for multi-stage protection. Use Value: 600 W PPPM rating and UL 497B recognition support compliance with Telcordia GR-1089-CORE Level 3 surge immunity testing. | Use Scenario: Protecting USB 2.0 D+/D− lines in portable medical monitors and smart home hubs against user-handling ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed immediately after USB connector to prevent latch-up in USB PHY ICs. Use Value: Sub-1 μA leakage at 85 V VWM avoids loading high-impedance data lines, preserving eye diagram integrity at 480 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA-E3/52 | Same VWM (85 V), but lower PPPM (600 W → 600 W), identical VBR/VC specs; SMB (DO-214AA) package instead of SMBG (DO-215AA) | SMB footprint requires PCB redesign; slightly higher RθJA (110 °C/W vs. 100 °C/W) | Select if legacy SMB layout exists and thermal margin ≥10 °C is acceptable |
| SMCJ85CAHE3_A/H | Higher PPPM (1500 W), same VWM/VBR, larger SMC (DO-214AB) package; AEC-Q101 qualified | Requires larger board area; better suited for higher-energy surges (e.g., ISO 7637-2 Pulse 5a) | Select when system-level surge test levels exceed IEC 61000-4-5 Level 4 or require >1000 W headroom |
Compared with SMBG85CAHE3/52, SMBJ85CA-E3/52 offers identical electrical performance in a legacy SMB package with marginally reduced thermal efficiency, while SMCJ85CAHE3_A/H delivers 2.5× higher surge power handling in a larger footprint-enabling robustness upgrades without changing VWM or clamping behavior.
Availability
SMBG85CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface, and telecom line interface requiring stable component supply, AEC-Q101 qualification, and consistent 600 W transient suppression performance.
Supply support for SMBG85CAHE3/52 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 supplier of discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMBG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure where bidirectional clamping, AEC-Q101 compliance, and standardized SMT packaging are mandatory.
FAQ
What does the "CA" suffix indicate in SMBG85CAHE3/52?
The "CA" suffix in SMBG85CAHE3/52 denotes a bidirectional transient voltage suppressor configuration, meaning the device provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBG85A), SMBG85CAHE3/52 has no polarity marking and functions identically in either direction-critical for protecting AC-coupled or floating signal lines such as CAN bus or RS-485 interfaces. This is confirmed in Vishay's documentation under "Devices for Bidirectional Applications".
Is SMBG85CAHE3/52 qualified for automotive use?
Yes, SMBG85CAHE3/52 is AEC-Q101 qualified, as explicitly stated in the mechanical data section and ordering information table of Vishay document 88456. The "HE3" suffix indicates RoHS compliance and AEC-Q101 qualification, validating its suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. It undergoes stress testing per AEC-Q101 Rev D, including temperature cycling, highly accelerated life testing, and ESD robustness verification.
What is the maximum clamping voltage of SMBG85CAHE3/52 and at what current is it specified?
The maximum clamping voltage (VC) of SMBG85CAHE3/52 is 137 V, measured at a peak pulse current (IPPM) of 4.4 A under the standardized 10/1000 μs double-exponential waveform. This value is listed in the Electrical Characteristics table for SMBG85A (bidirectional counterpart) and applies identically to SMBG85CAHE3/52 per Vishay's family specification. It defines the upper voltage limit imposed on protected circuitry during surge events.
Does SMBG85CAHE3/52 have UL recognition?
Yes, SMBG85CAHE3/52 carries Underwriters Laboratories (UL) recognition under file number E136766 and classification QVGQ2 per UL 497B, covering both unidirectional and bidirectional TRANSZORB® devices. This certification confirms compliance with safety standards for protectors used in telecommunications and industrial signal line applications, including dielectric withstand and flammability (UL 94 V-0) requirements.
What is the thermal resistance and mounting requirement for SMBG85CAHE3/52?
SMBG85CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. These values assume minimum recommended pad layout per Vishay's package outline drawing; reducing pad area increases thermal impedance and may derate power handling. The device is rated for TJ up to +150 °C, supporting operation in high-ambient environments.
SMBG85CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG85CAHE3/52 FAQ
1.How can I place an order for SMBG85CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG85CAHE3/52 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 SMBG85CAHE3/52 reliable?
The price and inventory of SMBG85CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG85CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG85CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG85CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG85CAHE3/52?
SMBG85CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG85CAHE3/52 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 SMBG85CAHE3/52?
For technical support, including SMBG85CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG85CAHE3/52 requirements.
6.How does Aetrix verify that SMBG85CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG85CAHE3/52 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 SMBG85CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG85CAHE3/52?
All SMBG85CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG85CAHE3/52, 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 SMBG85CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG85CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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