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Vishay General Semiconductor - Diodes Division SMBG8.5CAHE3/52
- Part No.:
- SMBG8.5CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG8.5CAHE3/52.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,070
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Product details
Overview
SMBG8.5CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 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 20 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMBG8.5CAHE3/52 datasheet, SMBG8.5CAHE3/52 pinout, SMBG8.5CAHE3/52 application, or SMBG8.5CAHE3/52 equivalent, key selection criteria include bidirectional polarity, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.47), 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-clamped shunt protector: during overvoltage events exceeding VWM, it avalanches symmetrically in both directions to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM) across -55 °C to +150 °C operating range.
The SMBG8.5CAHE3/52 delivers 20 A peak pulse current (IPPM) under 10/1000 μs waveform while maintaining ≤14.4 V clamping, enabling robust protection of 3.3 V and 5 V logic interfaces without latch-up risk. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation under repetitive surge conditions at ≤0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 5 V systems. |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on without premature conduction. |
| VC @ IPPM | 14.4 V at 20 A - Clamped voltage seen by protected IC during worst-case surge; keeps downstream logic below absolute max ratings. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 μs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity. |
| IPPM | 20 A - Peak surge current capability; sufficient for CAN bus, LIN, and analog sensor line protection. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; compatible with standard reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Case meets UL 94 V-0 flammability rating; matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients - symmetrical clamping behavior. |
| Cathode | Surge return path (bidirectional) | Electrically identical to Anode in CA-series devices; no functional distinction - terminals interchangeable in layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 surge tests up to 1 kV open-circuit / 0.5 kV short-circuit without degradation. |
| Low clamping ratio (VC/VBR) | ≈1.47 - Minimizes voltage overshoot during fast transients, critical for protecting 3.3 V microcontrollers. |
| MSL Level 1 | Enables direct placement into high-volume SMT lines without dry-pack or baking requirements. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage current over temperature and lifetime. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog pressure sensor outputs in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between signal line and ground, responding within <1 ns to transients exceeding 8.5 V. Use Value: Limits voltage seen by downstream ASIC to ≤14.4 V during 20 A surges, preventing latch-up and permanent damage in AEC-Q100 Grade 1 systems. |
Use Scenario: Safeguarding RS-485 transceiver inputs in programmable logic controllers subjected to field wiring-induced surges. IC Role / Device Role / Timing Role: Fast-acting TVS connected across differential pair (A/B) and ground, clamping common-mode transients before they reach receiver inputs. Use Value: Maintains signal integrity by suppressing >1 kV EFT bursts while adding <0.5 pF capacitance - negligible impact on 10 Mbps data rates. |
| Consumer USB Port Protection | Telecom Line Interface |
Use Scenario: ESD protection for USB 2.0 D+/D- lines in set-top boxes and smart home hubs per IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp mounted directly at connector, shunting ESD current to chassis ground. Use Value: Achieves <100 ps response time and clamps ±15 kV ESD to <20 V peak, preserving eye diagram integrity and USB enumeration reliability. |
Use Scenario: Overvoltage protection on POTS line interface circuits in VoIP gateways exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge suppression stage ahead of SLIC and isolation transformer, rated for 600 W unidirectional/bidirectional surges. Use Value: Handles 10/1000 μs surges up to 20 A while limiting voltage to 14.4 V - compatible with GR-1089-CORE telecom surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA-E3/52 | Same VWM (8.5 V), but lower PPPM = 600 W (same), higher VC = 15.0 V at 20 A; SMB (DO-214AA) package, 1.5 mm taller. | Less suitable for space-constrained automotive modules due to larger footprint and height; thermal resistance 110 °C/W vs. 100 °C/W. | Select SMBG8.5CAHE3/52 when AEC-Q101 qualification, lower profile, or tighter thermal performance is required. |
| SMCJ8.5CAHE3/52 | Same VWM and VBR, but PPPM = 1500 W; SMC (DO-214AB) package, 2× footprint area, higher IPPM = 50 A. | Better for high-energy surges (e.g., 4 kV IEC 61000-4-5), but excessive for typical sensor-level protection and incompatible with fine-pitch PCB layouts. | Choose SMBG8.5CAHE3/52 for compact, cost-optimized protection where 600 W suffices and board space is limited. |
Compared with SMBJ8.5CA-E3/52 and SMCJ8.5CAHE3/52, SMBG8.5CAHE3/52 offers optimal balance of AEC-Q101 compliance, low-profile SMBG packaging, and verified 600 W surge handling - making it preferred for automotive and industrial edge-node designs where reliability, size, and thermal efficiency are jointly constrained.
Availability
SMBG8.5CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, consumer USB port hardening, and telecom line interface circuits requiring stable component supply and full traceability.
Supply support for SMBG8.5CAHE3/52 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 leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on automotive-grade reliability and AEC-Q101 validation.
The SMBG series is engineered specifically for high-reliability transient suppression in space-constrained automotive and industrial environments, combining low-profile packaging with robust surge handling and extended temperature operation.
FAQ
What is the polarity configuration of SMBG8.5CAHE3/52?
SMBG8.5CAHE3/52 is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients without polarity marking on the package. Its breakdown voltage (9.44–10.4 V) and clamping voltage (14.4 V) apply identically in either direction, making it ideal for AC-coupled or differential signal lines like LIN or RS-485 where voltage polarity reverses.
Is SMBG8.5CAHE3/52 qualified for automotive applications?
Yes, SMBG8.5CAHE3/52 carries AEC-Q101 qualification (as indicated by the "HE3" suffix), confirming its suitability for automotive electronic systems including engine control units, body electronics, and ADAS sensor modules. It operates reliably from -55 °C to +150 °C and meets MSL Level 1 for lead-free reflow compatibility - critical for under-hood deployment.
What is the maximum clamping voltage of SMBG8.5CAHE3/52 at rated surge current?
The maximum clamping voltage (VC) of SMBG8.5CAHE3/52 is 14.4 V at 20 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions (mounted on 5.0 mm × 5.0 mm copper pads) and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events.
How does SMBG8.5CAHE3/52 differ from unidirectional variants like SMBG8.5AHE3/52?
SMBG8.5CAHE3/52 is bidirectional with symmetrical VBR and VC in both directions, whereas SMBG8.5AHE3/52 is unidirectional and includes a cathode band marking. The "CA" suffix denotes bidirectional functionality - essential for protecting AC signals or differential buses - while the unidirectional version is intended for DC power rail or single-ended signal line protection only.
What package type does SMBG8.5CAHE3/52 use, and what are its key mechanical features?
SMBG8.5CAHE3/52 uses the SMBG (DO-215AA) package: a low-profile surface-mount case measuring 4.57 mm × 3.94 mm × 2.10 mm. Key features include UL 94 V-0 flame-rated molding compound, matte tin-plated leads compliant with J-STD-002, and JESD 201 Class 2 whisker resistance - all supporting high-yield automated assembly and long-term reliability in harsh environments.
SMBG8.5CAHE3/52 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG8.5CAHE3/52 FAQ
1.How can I place an order for SMBG8.5CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG8.5CAHE3/52 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 SMBG8.5CAHE3/52 reliable?
The price and inventory of SMBG8.5CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG8.5CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG8.5CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG8.5CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG8.5CAHE3/52?
SMBG8.5CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG8.5CAHE3/52 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 SMBG8.5CAHE3/52?
For technical support, including SMBG8.5CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG8.5CAHE3/52 requirements.
6.How does Aetrix verify that SMBG8.5CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG8.5CAHE3/52 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 SMBG8.5CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG8.5CAHE3/52?
All SMBG8.5CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG8.5CAHE3/52, 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 SMBG8.5CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG8.5CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG8.5CAHE3/52 Tags
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