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Vishay General Semiconductor - Diodes Division SMBG85AHE3/52
- Part No.:
- SMBG85AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG85AHE3/52.pdf
- Description:
- TVS DIODE 85VWM 137VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,355
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Product details
Overview
SMBG85AHE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 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, and 600 W peak pulse power (10/1000 µs). It protects MOSFETs and signal lines in automotive powertrain control units against inductive switching transients.
For engineers reviewing the SMBG85AHE3/52 datasheet, SMBG85AHE3/52 pinout, SMBG85AHE3/52 application, or SMBG85AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, conducting only when reverse voltage exceeds VBR, thereby limiting transient overvoltage to ≤137 V at 4.4 A. Its glass-passivated junction ensures stable leakage (<1.0 µA at 85 V) and fast response time (<1 ns).
Designed for automotive-grade reliability, SMBG85AHE3/52 meets AEC-Q101 stress testing requirements and MSL Level 1 per J-STD-020 (peak reflow 260 °C). Thermal resistance is 100 °C/W junction-to-ambient (on 0.2" × 0.2" pads) and 20 °C/W junction-to-lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 94.4 V / 104 V at 1 mA - Ensures reliable turn-on above system nominal voltage with margin |
| VC @ IPPM | 137 V at 4.4 A - Clamping voltage limits downstream IC stress during 10/1000 µs transients |
| PPPM | 600 W - Peak pulse power handling capability under standardized surge waveform |
| IFSM | 100 A - Surge current rating for 8.3 ms half-sine wave, critical for load-dump protection |
| TJ max | +150 °C - Enables operation in under-hood automotive environments |
| Leakage @ VWM | ≤1.0 µA - Minimizes standby power loss in always-on vehicle modules |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing lead form, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; defines conduction direction in unidirectional mode |
| Cathode | Protected line input | Connected to the line being protected (e.g., 12 V supply rail); clamps to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain, body electronics, and ADAS modules |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| 600 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and ISO 16750-2 load-dump surges without degradation |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| Low profile SMBG package | 0.030" (0.76 mm) max height enables use in space-constrained engine control units |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting MCU I/O and gate drivers in engine control units exposed to alternator load dump and inductive coil switching. IC Role / Device Role: Unidirectional clamping TVS placed between 12 V rail and ground. Use Value: Limits transient voltage to ≤137 V, preventing latch-up or oxide rupture in 3.3 V/5 V logic interfaces downstream. | Use Scenario: Safeguarding PLC analog input channels connected to 24 V field sensors subject to cable-induced surges. IC Role / Device Role: Standoff protection on signal conditioning front-end before ADC input stage. Use Value: Maintains <1.0 µA leakage at 24 V, avoiding measurement offset while clamping EFT bursts to safe levels. |
| Automotive Body Electronics | Telecom DC Power Feeds |
Use Scenario: Shielding LIN bus transceivers and LED driver ICs in door module assemblies from battery reversal and jump-start spikes. IC Role / Device Role: Reverse-polarity and overvoltage protector on 12 V supply input. Use Value: Withstands 100 A surge (8.3 ms) without failure, enabling robust design for 12 V automotive systems. | Use Scenario: Protecting PoE-powered equipment inputs against lightning-induced surges on 48 V DC distribution lines. IC Role / Device Role: Primary clamping device on DC input rail upstream of DC/DC converter. Use Value: Delivers 600 W pulse power handling with 137 V clamping, meeting IEC 61000-4-5 Level 4 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A-E3/52 | Same VWM/VBR/VC specs but lower PPPM = 600 W (same rating), different package (SMB vs SMBG); RθJA = 110 °C/W vs 100 °C/W | Not AEC-Q101 qualified; intended for industrial/commercial use only | Select SMBJ85A-E3/52 only if automotive qualification is not required and board layout accommodates SMB footprint |
| SMCJ85AHE3/52 | Higher PPPM = 1500 W, same VWM/VBR, larger SMC (DO-214AB) package, RθJA = 50 °C/W | Used where higher surge energy absorption is needed (e.g., alternator output lines) | Choose SMCJ85AHE3/52 when system-level surge tests exceed 600 W capability or thermal budget allows larger footprint |
Compared with SMBJ85A-E3/52 and SMCJ85AHE3/52, SMBG85AHE3/52 uniquely combines AEC-Q101 qualification, SMBG's low-profile gull-wing leads for fine-pitch automated assembly, and optimized thermal performance (100 °C/W) for compact automotive modules-making it the preferred choice for space- and reliability-critical 12 V/24 V vehicle subsystems.
Availability
SMBG85AHE3/52 is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive inputs, and telecom DC power feeds requiring stable component supply across production lifecycles.
Supply support for SMBG85AHE3/52 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, TVS devices, and optoelectronics with emphasis on reliability and automotive-grade validation.
The SMBG series was developed specifically for high-reliability surface-mount transient suppression in automotive and industrial environments, balancing low profile, AEC-Q101 compliance, and robust 600 W surge handling in DO-215AA packaging.
FAQ
What is the clamping voltage of SMBG85AHE3/52 and how is it measured?
The SMBG85AHE3/52 has a maximum clamping voltage (VC) of 137 V, measured at a peak pulse current (IPPM) of 4.4 A using a 10/1000 µs double-exponential waveform. This value is guaranteed per the Vishay datasheet (Document Number 88456, Rev. 09-Jan-2024) and reflects worst-case voltage seen by downstream circuitry during standardized surge events. The SMBG85AHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBG85AHE3/52 suitable for automotive applications?
Yes, SMBG85AHE3/52 is AEC-Q101 qualified per the Vishay datasheet and carries the "HE3" suffix denoting RoHS-compliant, AEC-Q101-qualified construction. It is explicitly designed for automotive use cases including powertrain control units, body electronics, and ADAS sensor interfaces where reliability under thermal cycling, vibration, and electrical stress is mandatory. The SMBG85AHE3/52 meets all required stress test conditions defined in AEC-Q101.
What does the "/52" in SMBG85AHE3/52 indicate?
The "/52" suffix in SMBG85AHE3/52 specifies the packaging configuration: 750 units per 7-inch diameter plastic tape-and-reel. This is confirmed in the Ordering Information table of the Vishay datasheet (Document Number 88456), where "52" is defined as the preferred package code for that reel size and delivery mode. The SMBG85AHE3/52 is supplied in this format for automated SMT placement.
How does SMBG85AHE3/52 differ from bidirectional TVS diodes like SMBG85CA?
SMBG85AHE3/52 is unidirectional and features a cathode band marking; it conducts only during reverse overvoltage, making it ideal for DC rail protection. In contrast, SMBG85CA is bidirectional with no polarity marking and clamps in both directions-used for AC signal lines or differential buses. Their VBR, VC, and PPPM values differ slightly due to internal structure; SMBG85AHE3/52 has VBR = 94.4–104 V, while SMBG85CA has symmetric breakdown in both directions.
What is the thermal resistance of SMBG85AHE3/52 and how does it affect PCB layout?
The SMBG85AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. This value assumes minimum recommended pad layout; reducing pad area increases RθJA, risking thermal runaway during repetitive surges. For optimal performance, maintain the specified pad dimensions and ensure adequate copper pour around both terminals to sustain 150 °C junction temperature under worst-case duty cycle.
SMBG85AHE3/52 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBG85AHE3/52 FAQ
1.How can I place an order for SMBG85AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG85AHE3/52 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 SMBG85AHE3/52 reliable?
The price and inventory of SMBG85AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG85AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG85AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG85AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG85AHE3/52?
SMBG85AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG85AHE3/52 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 SMBG85AHE3/52?
For technical support, including SMBG85AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG85AHE3/52 requirements.
6.How does Aetrix verify that SMBG85AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG85AHE3/52 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 SMBG85AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG85AHE3/52?
All SMBG85AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG85AHE3/52, 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 SMBG85AHE3/52 part is unused and in its original packaging.
Return procedure for SMBG85AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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