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Vishay General Semiconductor - Diodes Division SMBJ85AHE3_B/H
- Part No.:
- SMBJ85AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ85AHE3_B/H.pdf
- Description:
- 600W,85V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,642
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Product details
Overview
SMBJ85AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 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), used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ85AHE3_B/H datasheet, SMBJ85AHE3_B/H pinout, SMBJ85AHE3_B/H application, or SMBJ85AHE3_B/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics 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 SMBJ85AHE3_B/H is rated for 600 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, and supports repetitive surge events when thermally managed. Its MSL Level 1 rating (JEDEC J-STD-020) and matte tin-plated leads ensure compatibility with standard SMT reflow profiles up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 85 V - Maximum continuous reverse operating voltage before significant conduction begins. |
| VBR (Breakdown Voltage) | 94.4–104 V at IT = 1 mA - Confirmed voltage range where device enters avalanche breakdown with tight tolerance. |
| VC (Clamping Voltage) | 137 V at IPPM = 4.4 A - Peak voltage seen across protected circuit during 10/1000 µs surge, defining protection margin. |
| PPPM (Peak Pulse Power) | 600 W - Surge energy handling capability under standardized 10/1000 µs waveform, critical for IEC 61000-4-5 compliance. |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in high-ambient industrial environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on recommended 0.2" × 0.2" copper pads, guiding heatsinking requirements. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability per stress test standard, supporting under-hood and ADAS applications. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), compliant with IPC-7351B footprint standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; defines forward conduction path during surge clamping. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 85 V supply rail); carries full surge current into anode during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without derating in standard PCB layouts. |
| Glass passivated chip junction | Ensures stable VBR over lifetime and improved humidity resistance versus epoxy-passivated alternatives. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without moisture-related popcorning or delamination. |
| AEC-Q101 qualified (HE3 suffix) | Validates reliability for automotive powertrain and body electronics where long-term field stability is mandatory. |
| UL 497B recognized (QVGQ2) | Confirms compliance for use in telecom and industrial equipment requiring certified surge protection devices. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting 85 V DC bus in programmable logic controller (PLC) power stages from inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input capacitor to clamp positive-going surges before they reach downstream DC-DC converters. Use Value: Limits transient voltage to ≤137 V, preserving 100 V-rated input capacitors and preventing MOSFET gate oxide damage. |
Use Scenario: Safeguarding LIN bus interface ICs in BCM modules exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standby clamping device on 12 V auxiliary rail, activated only during >85 V overvoltage events. Use Value: Maintains system uptime by absorbing 600 W surge energy without failure, meeting ISO 7637-2 Pulse 5a requirements. |
| Telecom Remote Radio Unit (RRU) | Factory Automation Sensor Hub |
|
Use Scenario: Shielding RS-485 transceivers and PoE-powered RF amplifiers from lightning-induced surges on outdoor fiber-to-radio links. IC Role / Device Role / Timing Role: Primary clamping element on DC input line, coordinated with upstream GDT and downstream TVS array. Use Value: Achieves <1 ns response time and 137 V clamping to prevent latch-up in 3.3 V logic interfaces downstream. |
Use Scenario: Protecting analog front-end inputs of 24 V industrial IO-Link sensors from ESD and relay coil flyback. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) unidirectional suppressor placed at connector entry point before signal conditioning stage. Use Value: Preserves signal integrity with minimal offset error while surviving 8 kV contact ESD per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85AHM3_B/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is required for end-equipment certification. | Choose SMBJ85AHM3_B/H if EU RoHS Annex II halogen restrictions apply to final product. |
| SMCJ85AHE3_A/H | Larger SMC (DO-214AB) package with higher 1500 W PPPM rating and lower RθJA (50 °C/W), same VWM/VBR/VC. | Better thermal performance and surge margin; requires larger PCB footprint and different pad layout. | Choose SMCJ85AHE3_A/H when 600 W is insufficient or board-level thermal management is constrained. |
Compared with SMBJ85AHE3_B/H, SMBJ85AHM3_B/H offers identical protection performance with halogen-free construction, while SMCJ85AHE3_A/H delivers higher surge capacity and improved thermal dissipation at the cost of increased board area and layout redesign.
Availability
SMBJ85AHE3_B/H is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom remote radio units, and factory automation sensor hubs requiring stable component supply with AEC-Q101 validation and UL recognition.
Supply support for SMBJ85AHE3_B/H 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 application-specific qualification.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where surge immunity and long-term parametric stability are critical.
FAQ
What is the clamping voltage of SMBJ85AHE3_B/H at its rated peak pulse current?
The SMBJ85AHE3_B/H has a maximum clamping voltage (VC) of 137 V at 4.4 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Vishay datasheet Document Number 88392, page 2.
Is SMBJ85AHE3_B/H qualified for automotive applications?
Yes, SMBJ85AHE3_B/H is AEC-Q101 qualified, as indicated by the "HE3" suffix and explicitly stated in the Vishay ordering information table (page 3). This qualification validates its reliability for automotive body electronics, infotainment, and ADAS subsystems subject to extended temperature cycling and mechanical shock.
What is the thermal resistance junction-to-ambient for SMBJ85AHE3_B/H?
The typical thermal resistance junction-to-ambient (RθJA) for SMBJ85AHE3_B/H is 100 °C/W, measured on the minimum recommended 0.2" × 0.2" copper pad layout per JEDEC standards. This value guides thermal design when multiple surges occur in rapid succession or ambient temperatures exceed 70 °C.
Does SMBJ85AHE3_B/H have UL recognition?
Yes, SMBJ85AHE3_B/H carries Underwriters Laboratories recognition under UL 497B (file E136766) for both unidirectional and bidirectional TVS devices. This certification confirms its suitability as a primary surge protection component in telecom and industrial equipment requiring safety agency approval.
What is the maximum reverse leakage current for SMBJ85AHE3_B/H at its stand-off voltage?
The maximum reverse leakage current (ID) for SMBJ85AHE3_B/H is 1.0 µA at its 85 V stand-off voltage (VWM), tested at TA = 25 °C. This low leakage preserves efficiency in always-on circuits and avoids unintended biasing of downstream analog or low-power logic stages.
SMBJ85AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ85AHE3_B/H FAQ
1.How can I place an order for SMBJ85AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ85AHE3_B/H 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 SMBJ85AHE3_B/H reliable?
The price and inventory of SMBJ85AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ85AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ85AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ85AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ85AHE3_B/H?
SMBJ85AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ85AHE3_B/H 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 SMBJ85AHE3_B/H?
For technical support, including SMBJ85AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ85AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ85AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ85AHE3_B/H 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 SMBJ85AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ85AHE3_B/H?
All SMBJ85AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ85AHE3_B/H, 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 SMBJ85AHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ85AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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