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Vishay General Semiconductor - Diodes Division SMBG85AHE3/5B
- Part No.:
- SMBG85AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG85AHE3/5B.pdf
- Description:
- TVS DIODE 85VWM 137VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,076
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Product details
Overview
SMBG85AHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® 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), 137 V clamping voltage (VC) at 4.4 A peak pulse current, and 600 W peak pulse power (10/1000 μs). It protects automotive sensor signal lines against inductive switching transients.
For engineers reviewing the SMBG85AHE3/5B datasheet, SMBG85AHE3/5B pinout, SMBG85AHE3/5B application, or SMBG85AHE3/5B 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 to limit transient energy. Its glass-passivated junction ensures stable leakage (<1.0 μA at 85 V) and fast response time (<1.0 ns), critical for protecting MOSFET gates and CAN/LIN bus receivers.
The SMBG85AHE3/5B is designed for repetitive surge conditions up to 0.01% duty cycle, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation under sustained transient stress in automotive engine control units and ADAS domain controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V/24 V automotive systems. |
| VBR (min/max) | 94.4 V / 104 V at 1.0 mA - Confirmed breakdown threshold range; ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 137 V at 4.4 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to <140 V in 85 V-rated circuits. |
| PPPM | 600 W - Peak pulse power handling capability; supports ISO 7637-2 Pulse 1/2a/5a compliance testing without degradation. |
| IFSM | 100 A - 8.3 ms half-sine surge rating; withstands high-energy load dump events in vehicle power distribution networks. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood ECUs with ambient temperatures up to +125 °C. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; supports standard reflow without baking prior to assembly. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connects to protected line; conducts surge current to ground when VREV > VBR; must be routed with low-inductance path to chassis or power ground. |
| Anode (unmarked end) | Reference/return node | Typically tied to system ground or low-impedance return plane; forms clamping loop with cathode; polarity-sensitive for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, body electronics, and ADAS modules. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 μA) over lifetime; prevents parameter drift under humidity and thermal stress. |
| 600 W peak pulse power (10/1000 μs) | Handles high-energy transients from relay coil collapse or alternator load dump without failure or parametric shift. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage exposure to protected ICs - critical for 100 V-rated CAN transceivers and LIN interface ICs. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without moisture sensitivity concerns; eliminates pre-bake step in high-volume SMT lines. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Feedback Circuit |
|---|---|
Use Scenario: Protects microcontroller ADC inputs and PWM gate drivers from flyback voltage spikes generated by fuel injector solenoids and ignition coils. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed directly at connector entry point and IC pins to limit transients to <140 V within 1 ns. Use Value: Prevents latch-up and gate oxide damage in 3.3 V/5 V MCU I/Os while maintaining signal integrity during 100 A inductive switch-off events. | Use Scenario: Shields analog current-sense amplifier inputs and isolated gate driver feedback paths from commutation noise in 48 V BLDC motor inverters. IC Role / Device Role / Timing Role: Fast-response voltage clamp on shunt resistor measurement nodes and optocoupler input side to suppress dV/dt-induced false triggering. Use Value: Enables stable 12-bit current sensing accuracy by limiting common-mode surges to <137 V, avoiding amplifier saturation or reset during 50 kHz PWM switching. |
| Automotive Radar Module Power Rail | Telecom Base Station DC Power Input |
Use Scenario: Guards 5 V and 12 V supply rails feeding 77 GHz RF transceivers and FPGA timing circuits against battery line transients during cold-crank and jump-start conditions. IC Role / Device Role / Timing Role: Primary rail-level TVS on main power entry PCB footprint, coordinated with upstream fuse and downstream ceramic capacitors for impedance matching. Use Value: Maintains uninterrupted radar operation by clamping ISO 16750-2 Pulse 4 (load dump) to ≤137 V, preventing brownout resets and PLL unlock events. | Use Scenario: Safeguards -48 V telecom rectifier outputs and PoE midspan injectors against lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: First-stage protection device on DC input board, positioned before DC-DC converters and hot-swap controllers to absorb bulk surge energy. Use Value: Extends system uptime by surviving 600 W 10/1000 μs surges without degradation, meeting Telcordia GR-1089-CORE Zone 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG85AE3/5B | Same electrical specs but lacks AEC-Q101 qualification; industrial-grade only. | Not suitable for automotive OEM or Tier 1 production; acceptable for industrial control panels with lower reliability requirements. | Select SMBG85AE3/5B only if AEC-Q101 is not mandated and cost is primary constraint. |
| SMAJ85A-E3/5B | Same VWM/VC, but SMA package (DO-214AC); 400 W PPPM, higher RθJA (150 °C/W). | Lower power handling and thermal performance; unsuitable for high-duty-cycle automotive environments. | Choose SMAJ85A-E3/5B only for space-constrained non-automotive designs where 400 W suffices and reflow profile allows MSL Level 1. |
Compared with SMBG85AE3/5B and SMAJ85A-E3/5B, the SMBG85AHE3/5B uniquely combines AEC-Q101 qualification, 600 W surge capacity, and SMBG thermal performance - making it the only option qualified for under-hood automotive use with full ISO 7637-2 compliance.
Availability
SMBG85AHE3/5B is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom infrastructure projects requiring stable component supply with AEC-Q101 assurance and long-term production continuity.
Supply support for SMBG85AHE3/5B 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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBG TransZORB® series was engineered specifically for high-reliability transient suppression in harsh automotive and industrial environments, delivering robust clamping performance in compact surface-mount packages.
FAQ
What is the maximum clamping voltage of SMBG85AHE3/5B and under what test condition?
The SMBG85AHE3/5B 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 waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and confirms its suitability for protecting 100 V-rated interfaces in automotive applications.
Is SMBG85AHE3/5B qualified for automotive use, and what standard does it meet?
Yes, SMBG85AHE3/5B is AEC-Q101 qualified - verified per the full stress test schedule including HTGB, TCT, and H3TRB. The "HE3" suffix explicitly denotes AEC-Q101 qualification and RoHS compliance, making SMBG85AHE3/5B appropriate for safety-critical automotive subsystems such as engine management and ADAS sensors.
What is the thermal resistance of SMBG85AHE3/5B, and how does it affect PCB layout?
SMBG85AHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. To maintain safe junction temperature, the PCB must use minimum 5.0 mm × 5.0 mm copper pads per terminal - smaller pads increase thermal impedance and risk exceeding the 150 °C TJ limit during repeated surges.
Does SMBG85AHE3/5B have polarity marking, and how is it oriented in circuit?
Yes, SMBG85AHE3/5B is unidirectional and features a cathode band marking on the banded end. In circuit, the cathode connects to the line being protected (e.g., signal or power rail), and the anode connects to ground - reverse orientation will prevent clamping and may cause catastrophic failure during overvoltage events.
What packaging format does SMBG85AHE3/5B ship in, and what is the reel quantity?
SMBG85AHE3/5B ships in 13-inch diameter plastic tape and reel format with a base quantity of 3200 pieces per reel (package code "5B"). This large-reel configuration supports high-volume SMT production lines and reduces changeover frequency compared to 7-inch reels (52-code) holding only 750 units.
SMBG85AHE3/5B 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:
- 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)
SMBG85AHE3/5B FAQ
1.How can I place an order for SMBG85AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG85AHE3/5B 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 SMBG85AHE3/5B reliable?
The price and inventory of SMBG85AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG85AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG85AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG85AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG85AHE3/5B?
SMBG85AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG85AHE3/5B 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 SMBG85AHE3/5B?
For technical support, including SMBG85AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG85AHE3/5B requirements.
6.How does Aetrix verify that SMBG85AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG85AHE3/5B 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 SMBG85AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG85AHE3/5B?
All SMBG85AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG85AHE3/5B, 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 SMBG85AHE3/5B part is unused and in its original packaging.
Return procedure for SMBG85AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG85AHE3/5B Tags
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