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Vishay General Semiconductor - Diodes Division SMBG8.5CAHE3/5B
- Part No.:
- SMBG8.5CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG8.5CAHE3/5B.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,815
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Product details
Overview
SMBG8.5CAHE3/5B 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 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 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 against ESD and load dump.
For engineers reviewing the SMBG8.5CAHE3/5B datasheet, SMBG8.5CAHE3/5B pinout, SMBG8.5CAHE3/5B application, or SMBG8.5CAHE3/5B equivalent, key selection criteria include bidirectional polarity, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.47), 1.0 µA max reverse leakage at VWM, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical bidirectional conduction - enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while the low-profile SMBG package supports high-density PCB layouts and meets MSL level 1 reflow requirements up to 260 °C peak.
The SMBG8.5CAHE3/5B delivers repeatable 600 W transient suppression under 0.01 % duty cycle conditions, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), allowing reliable operation up to +150 °C junction temperature in automotive under-hood environments.
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 - defines tight breakdown tolerance for predictable turn-on threshold |
| VC @ IPPM | 14.4 V at 20 A - limits downstream voltage stress during 10/1000 µs surge events |
| PPPM | 600 W - peak pulse power handling capability per single transient event |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor lines |
| TJ max | +150 °C - enables use in automotive engine control units and industrial motor drives |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional - no polarity marking; symmetrical cathode/anode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One terminal of symmetrical junction; conducts during positive or negative overvoltage |
| Cathode | Transient current exit (reverse bias) | Second terminal of symmetrical junction; completes bidirectional clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without external polarity management |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges on 12 V systems |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| MSL Level 1 | Supports lead-free reflow up to 260 °C peak without popcorn or delamination risk |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle cabin modules. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector or IC input pins to shunt transients before they reach sensitive analog front-ends. Use Value: Limits clamped voltage to 14.4 V, well below typical 16 V absolute max ratings of automotive op-amps and ADC drivers. | Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field wiring exposed to inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional transient suppressor across input terminals to absorb both positive and negative polarity surges induced by relay coil de-energization. Use Value: Maintains ≤1.0 µA leakage at 8.5 V, preventing false triggering in high-impedance optocoupler-based isolation inputs. |
| Consumer Audio Line Protection | Telecom Data Port Surge Suppression |
Use Scenario: Shielding balanced audio inputs (e.g., XLR, TRS) in professional mixers from ESD and cable discharge events. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) referenced to ground, leveraging bidirectional behavior to clamp common-mode and differential transients. Use Value: Achieves <1 ns response time and clamps to 14.4 V, preserving dynamic range of 24-bit audio converters operating at ±12 V rails. | Use Scenario: Protecting RS-485 transceiver data lines in base station backhaul equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS mounted at board edge before transceiver, providing primary-level surge diversion per IEC 61000-4-5. Use Value: Delivers 600 W pulse handling with 14.4 V clamping, ensuring transceiver survival under 4 kV/2 Ω combination wave testing. |
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 | Same VWM (8.5 V), but lower PPPM = 600 W (same), higher VC = 15.0 V at 20 A | Not AEC-Q101 qualified; intended for industrial/commercial use only | Select when automotive qualification is not required and slightly higher clamping voltage is acceptable |
| SMCJ8.5CA | Same VWM and VBR, but larger SMC (DO-214AB) package, PPPM = 1500 W, VC = 13.4 V at 113 A | Higher power handling but 3× larger footprint; requires more PCB area and thermal relief | Select when system-level surge tests exceed 600 W or when higher IPPM margin is needed |
Compared with SMBJ8.5CA and SMCJ8.5CA, the SMBG8.5CAHE3/5B uniquely combines AEC-Q101 qualification, SMBG's compact 4.57 mm × 3.94 mm footprint, and 14.4 V clamping - making it optimal for space-constrained automotive modules where reliability and size are co-prioritized.
Availability
SMBG8.5CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom data port surge suppression requiring stable component supply across production lifecycles.
Supply support for SMBG8.5CAHE3/5B 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, precision, and automotive-grade validation.
The SMBG series was developed specifically for high-reliability surface-mount transient suppression in automotive and industrial environments - prioritizing AEC-Q101 compliance, low-profile packaging, and consistent clamping performance across temperature.
FAQ
What does the 'HE3' suffix indicate in SMBG8.5CAHE3/5B?
The 'HE3' suffix denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads. It confirms that SMBG8.5CAHE3/5B meets automotive reliability standards including temperature cycling, highly accelerated life testing (HALT), and solderability per J-STD-002 - distinguishing it from industrial-grade 'E3' variants without automotive qualification.
Is SMBG8.5CAHE3/5B unidirectional or bidirectional?
SMBG8.5CAHE3/5B is a bidirectional TVS diode, as indicated by the 'CA' suffix. It provides symmetrical clamping for both positive and negative transients without polarity marking on the SMBG package - essential for protecting AC-coupled lines, differential buses like CAN or RS-485, and floating sensor outputs where voltage polarity reversal may occur.
What is the maximum clamping voltage of SMBG8.5CAHE3/5B and at what current?
The maximum clamping voltage (VC) of SMBG8.5CAHE3/5B is 14.4 V, measured at a peak pulse current (IPPM) of 20 A using the standard 10/1000 µs waveform. This value ensures downstream components rated for 16 V absolute maximum survive transient events - a critical design margin verified per ANSI/IEEE C62.35 test methodology.
Does SMBG8.5CAHE3/5B require a heatsink in typical applications?
No, SMBG8.5CAHE3/5B does not require an external heatsink in standard applications. With a junction-to-ambient thermal resistance (RθJA) of 100 °C/W and 600 W peak power applied only intermittently (0.01 % duty cycle), self-heating remains negligible. Proper PCB copper pad layout (0.2" × 0.2" per terminal) provides sufficient thermal dissipation for automotive and industrial use cases.
How does SMBG8.5CAHE3/5B differ from SMBG8.5AHE3/5B?
SMBG8.5CAHE3/5B is bidirectional ('CA'), while SMBG8.5AHE3/5B is unidirectional ('A'). The bidirectional version clamps both polarities symmetrically and has no cathode band marking; the unidirectional variant features a cathode band and conducts only in reverse bias. Their VWM, VBR, and VC values differ slightly - SMBG8.5AHE3/5B has VC = 13.6 V at 44.1 A, reflecting different test current and conduction path design.
SMBG8.5CAHE3/5B 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)
SMBG8.5CAHE3/5B FAQ
1.How can I place an order for SMBG8.5CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG8.5CAHE3/5B 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 SMBG8.5CAHE3/5B reliable?
The price and inventory of SMBG8.5CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG8.5CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG8.5CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG8.5CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG8.5CAHE3/5B?
SMBG8.5CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG8.5CAHE3/5B 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 SMBG8.5CAHE3/5B?
For technical support, including SMBG8.5CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG8.5CAHE3/5B requirements.
6.How does Aetrix verify that SMBG8.5CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG8.5CAHE3/5B 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 SMBG8.5CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG8.5CAHE3/5B?
All SMBG8.5CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG8.5CAHE3/5B, 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 SMBG8.5CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBG8.5CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG8.5CAHE3/5B Tags
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