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Vishay General Semiconductor - Diodes Division SMB10J8.5HE3/52
- Part No.:
- SMB10J8.5HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J8.5HE3/52.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,777
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Product details
Overview
SMB10J8.5HE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on power and signal 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 clamping voltage (VC) at 20 A peak pulse current, and 1000 W peak pulse power rating with 10/1000 µs waveform. It is AEC-Q101 qualified and used to protect automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.
For engineers reviewing the SMB10J8.5HE3/52 datasheet, SMB10J8.5HE3/52 pinout, SMB10J8.5HE3/52 application, or SMB10J8.5HE3/52 equivalent, key selection criteria include clamping performance under 20 A surge, unidirectional polarity with cathode band marking, RoHS-compliant AEC-Q101 qualification, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM), while its low incremental surge resistance enables rapid response to sub-microsecond transients per ANSI/IEEE C62.35.
The device is rated for 150 °C maximum junction temperature and exhibits 72 °C/W junction-to-ambient thermal resistance on standard PCB pads. Its 100 W steady-state power dissipation (PD) and 100 A non-repetitive forward surge rating support robust operation in automotive and industrial environments where repetitive switching surges occur.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC working range for protected line. |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage with margin. |
| VC @ IPPM | 14.4 V at 20 A - Clamped voltage during 10/1000 µs surge; limits stress on downstream MOSFET gate or MCU I/O pin. |
| PPPM | 1000 W - Peak pulse power handling capability; supports protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1.0 µA - Reverse leakage at stand-off voltage; minimizes quiescent power loss and avoids false triggering in high-impedance sensor lines. |
| TJ max | 150 °C - Maximum junction temperature; enables use in under-hood automotive locations and enclosed industrial enclosures. |
| Package | DO-214AA (SMB) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with standard 7″ tape-and-reel (52) feeding. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode indicated by color band at one end. Designed for reflow soldering per J-STD-020 MSL level 1 (peak 260 °C). Mounting requires 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection point for unidirectional clamping | Connected to protected line (e.g., 12 V rail); conducts avalanche current to ground during overvoltage event. |
| Anode | Reference/return path | Connected to system ground; completes shunt path for transient current; must be low-inductance to maintain clamping integrity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS sensor modules. |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift in harsh environments. |
| Low-profile SMB package | Enables high-density PCB layouts and compatibility with automated pick-and-place equipment without tombstoning risk. |
| 1000 W peak pulse power | Provides margin against severe transients such as load dump (ISO 16750-2) and inductive switching spikes in 12 V/24 V systems. |
| Matte tin plating | Meets JESD 22-B102 solderability and JESD 201 class 2 whisker resistance - ensures long-term interconnect reliability in thermal-cycled applications. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in engine bay modules exposed to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between signal line and chassis ground, responding within nanoseconds to clamp voltage below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to 5 V or 3.3 V interface ICs during load dump events up to 1000 W, maintaining functional safety compliance. |
Use Scenario: Safeguarding digital input terminals of programmable logic controllers against field-wiring transients induced by relay coil de-energization or motor contactor switching. IC Role / Device Role / Timing Role: Primary front-end protection element on 24 V DC input channels, absorbing repetitive 10/1000 µs surges without degradation. Use Value: Extends mean time between failures (MTBF) of PLC hardware by limiting voltage excursion to ≤14.4 V during 20 A surge events. |
| Power Supply Rail Clamping | USB/Serial Interface ESD Protection |
Use Scenario: Secondary overvoltage protection on 12 V or 24 V DC power rails feeding microcontrollers and PMICs in telematics units. IC Role / Device Role / Timing Role: Parallel-connected clamping device that activates only during abnormal overvoltage conditions, remaining high-impedance during normal operation. Use Value: Complements upstream fuses and filters by suppressing fast-rising transients (e.g., alternator ripple spikes) that bypass bulk capacitance. |
Use Scenario: Board-level ESD safeguard on RS-232, RS-485, or USB VBUS lines in industrial gateways where human-accessible connectors are present. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) transient suppressor placed adjacent to connector, shunting ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity on data lines while clamping ESD events to <14.4 V - below damage threshold of transceiver ESD structures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A-E3/52 | Same DO-214AA package and 8.5 V VWM, but not AEC-Q101 qualified; lower surge rating (600 W vs. 1000 W). | Restricted to commercial-grade consumer or office equipment; unsuitable for automotive or safety-critical industrial use. | Select only if AEC-Q101 and 1000 W rating are not required; verify thermal derating for sustained surge exposure. |
| SMCJ8.5AHE3/52 | Higher 1500 W PPPM rating in larger DO-214AB (SMC) package; identical VWM/VBR/VC specs and AEC-Q101 qualification. | Requires larger PCB area and higher mounting pad thermal mass; preferred where higher single-pulse energy margin is needed. | Choose when system-level surge test requirements exceed 1000 W or when extended thermal endurance under repeated surges is critical. |
Compared with SMBJ8.5A-E3/52, SMB10J8.5HE3/52 delivers automotive-grade reliability and 67% higher surge power handling in the same footprint; versus SMCJ8.5AHE3/52, it trades 50% lower surge capacity for 30% smaller board area and faster assembly throughput.
Availability
SMB10J8.5HE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecommunications infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB10J8.5HE3/52 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMB10J series belongs to Vishay's TRANSZORB® high-power TVS platform, engineered specifically for demanding automotive and industrial transient suppression where AEC-Q101 compliance and 1000 W surge capability are mandatory.
FAQ
What is the clamping voltage of SMB10J8.5HE3/52 at its rated peak pulse current?
The SMB10J8.5HE3/52 has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated 20 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and ensures downstream components see no more than 14.4 V during surge events. The SMB10J8.5HE3/52 maintains this clamping performance across its operational temperature range and after multiple surge cycles when mounted per recommended pad layout.
Is SMB10J8.5HE3/52 suitable for bi-directional transient protection?
No, SMB10J8.5HE3/52 is a unidirectional TVS diode, identified by its cathode band marking and specified electrical characteristics for reverse-biased operation only. For bi-directional protection, Vishay offers the SMB8J8.5CA variant with symmetrical breakdown and 800 W rating. Using SMB10J8.5HE3/52 in bi-directional configurations risks forward conduction during positive transients and violates its rated specifications. Always match device polarity to circuit topology - SMB10J8.5HE3/52 is intended for DC-biased lines like 12 V supplies or unidirectional signal paths.
What does the "HE3" suffix indicate in SMB10J8.5HE3/52?
The "HE3" suffix in SMB10J8.5HE3/52 denotes two key attributes: "H" signifies AEC-Q101 qualification for automotive applications, and "E3" indicates RoHS-compliant construction with matte tin lead finish meeting JESD 201 class 2 whisker resistance. This distinguishes it from commercial-grade "E3" variants (e.g., SMBJ8.5A-E3/52) which lack automotive qualification. The SMB10J8.5HE3/52 therefore meets stringent automotive reliability standards including temperature cycling, highly accelerated life testing, and mechanical shock requirements defined in AEC-Q101.
How does SMB10J8.5HE3/52 compare to SMAJ8.5A in terms of surge capability?
SMB10J8.5HE3/52 delivers 1000 W peak pulse power (PPPM) in the DO-214AA (SMB) package, whereas SMAJ8.5A provides only 400 W in the smaller DO-214AC (SMA) package. The SMB10J8.5HE3/52 achieves this via optimized chip geometry and thermal design, enabling higher surge current handling (20 A vs. 8 A) and lower clamping impedance. Both share the same 8.5 V VWM and AEC-Q101 qualification, but SMB10J8.5HE3/52 is specified for applications requiring higher energy absorption - such as automotive load dump protection - where SMAJ8.5A would thermally saturate or fail prematurely.
What PCB layout guidance applies to SMB10J8.5HE3/52 for optimal thermal and electrical performance?
For rated 1000 W surge performance, SMB10J8.5HE3/52 must be mounted on minimum 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay document 88422. Traces to ground should be short and wide to minimize inductance, and thermal vias under pads improve heat dissipation during repetitive surges. Avoid routing sensitive traces near the device body, and ensure the cathode band orientation matches schematic polarity. The SMB10J8.5HE3/52's thermal resistance (RθJA = 72 °C/W) is validated only with this pad layout - reduced copper area increases junction temperature and degrades clamping consistency.
SMB10J8.5HE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 15.9V
- Current - Peak Pulse (10/1000µs):
- 62.9A
- Power - Peak Pulse:
- 1000W (1kW)
- 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 (SMB)
SMB10J8.5HE3/52 FAQ
1.How can I place an order for SMB10J8.5HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J8.5HE3/52 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 SMB10J8.5HE3/52 reliable?
The price and inventory of SMB10J8.5HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J8.5HE3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J8.5HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J8.5HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J8.5HE3/52?
SMB10J8.5HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J8.5HE3/52 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 SMB10J8.5HE3/52?
For technical support, including SMB10J8.5HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J8.5HE3/52 requirements.
6.How does Aetrix verify that SMB10J8.5HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J8.5HE3/52 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 SMB10J8.5HE3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J8.5HE3/52?
All SMB10J8.5HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J8.5HE3/52, 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 SMB10J8.5HE3/52 part is unused and in its original packaging.
Return procedure for SMB10J8.5HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J8.5HE3/52 Tags
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