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Vishay General Semiconductor - Diodes Division SMB10J8.5-E3/52
- Part No.:
- SMB10J8.5-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J8.5-E3/52.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,000
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Product details
Overview
SMB10J8.5-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on DC power rails 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 maximum clamping voltage (VC) at 20 A peak pulse current, and 1000 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SMB10J8.5-E3/52 datasheet, SMB10J8.5-E3/52 pinout, SMB10J8.5-E3/52 application, or SMB10J8.5-E3/52 equivalent, key selection criteria include clamping performance under 20 A surge, unidirectional polarity for DC rail protection, RoHS-compliant matte tin terminations, AEC-Q101 qualification for automotive use, 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: under normal conditions it presents high impedance (>1000 MΩ leakage at 8.5 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR and low incremental surge resistance for repeatable clamping behavior.
The device meets J-STD-020 MSL Level 1 (260 °C peak reflow), supports 100 A non-repetitive forward surge (IFSM), and delivers thermal resistance of 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit's nominal DC rail. |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 14.4 V at 20 A - Clamping voltage defines worst-case overvoltage seen by downstream ICs during 10/1000 μs surge. |
| PPPM | 1000 W - Peak pulse power handling capacity determines survivability against high-energy lightning or ESD-induced surges. |
| IR @ VWM | 1.0 μA max - Ultra-low reverse leakage preserves efficiency and prevents false triggering in battery-powered systems. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with cathode band marking; compatible with JEDEC-standard 7" tape-and-reel (E3/52). |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC stress test requirements. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with two leads, cathode identified by a color band on the body. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 1A whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground or return path | Completes shunt path during transient; must be routed with minimal inductance to maintain clamping speed. |
| Cathode | High-side connection to protected line (e.g., +12 V rail) | Marked by color band; connects to vulnerable node requiring overvoltage suppression; polarity-critical for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift. |
| Low-profile DO-214AA package | Enables high-density PCB layout while maintaining 1000 W surge capability-ideal for space-constrained automotive ECUs and industrial controllers. |
| 1000 W peak pulse power (10/1000 μs) | Provides robust protection against IEC 61000-4-5 Level 4 (4 kV) surges on 12 V/24 V power buses without derating. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules where failure modes demand zero-risk surge response. |
| RoHS-compliant E3 suffix | Meets global environmental regulations; matte tin plating ensures solder joint integrity and eliminates lead-based assembly concerns. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs of engine control units (ECUs) against load dump and alternator transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and chassis ground, clamping spikes within nanoseconds. Use Value: Limits voltage to ≤14.4 V during 20 A surge, preventing damage to microcontrollers and CAN transceivers rated for 16 V absolute maximum. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to motor switching noise. IC Role / Device Role / Timing Role: Bidirectional-capable protection element (though SMB10J8.5-E3/52 is unidirectional, used on positive rail side only) suppressing fast-rising EFT bursts. Use Value: Maintains signal integrity by limiting induced overvoltage to <15 V, avoiding ADC saturation and ensuring ±0.1% measurement accuracy. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Line Protection |
Use Scenario: Secondary-side DC output protection in wall adapters powering USB-C PD devices and smart home hubs. IC Role / Device Role / Timing Role: Unidirectional TVS placed after rectification to clamp flyback-induced overshoot and external surge coupling. Use Value: Withstands 1000 W pulses without degradation, enabling compliance with UL 62368-1 surge immunity requirements for Class II power supplies. | Use Scenario: Overvoltage protection on -48 V DC feeder lines feeding remote radio units (RRUs) in 4G/5G base stations. IC Role / Device Role / Timing Role: High-power shunt limiter installed at equipment input connector to divert lightning-induced surges before entering DC-DC converters. Use Value: Clamps 20 A transients to 14.4 V, preserving -48 V system stability and meeting ITU-T K.20/21 immunity standards for telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A-E3/52 | Same VWM (8.5 V), identical DO-214AA package and AEC-Q101 qualification; differs only in part numbering convention (SMBJ vs SMB10J series). | No functional difference; both rated for 1000 W PPPM and share identical electrical specs per Vishay documentation. | Select SMB10J8.5-E3/52 for legacy BOM continuity or SMBJ8.5A-E3/52 if sourcing from alternate distributor stock with identical traceability. |
| 1.5SMC8.5A | Higher package thermal resistance (RθJA = 11°C/W vs 72°C/W), lower surge rating (1500 W but with larger SMC package), and no AEC-Q101 qualification. | Not suitable for automotive under-hood environments; better suited for industrial mains-input protection where board space allows larger footprint. | Choose 1.5SMC8.5A only when higher peak power (1500 W) is required and AEC-Q101 is not mandated; SMB10J8.5-E3/52 remains preferred for space-constrained, automotive-grade designs. |
Compared with SMBJ8.5A-E3/52, SMB10J8.5-E3/52 offers identical performance in same footprint; versus 1.5SMC8.5A, it trades peak power for AEC-Q101 compliance and 40% smaller PCB area-critical for modern ECU miniaturization.
Availability
SMB10J8.5-E3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, consumer power adapters, and telecom DC feeder lines requiring stable component supply across production lifecycles.
Supply support for SMB10J8.5-E3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power density, and automotive qualification.
The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, surface-mount surge protection in harsh environments-including under-hood automotive, industrial automation, and telecom infrastructure.
FAQ
What is the clamping voltage of SMB10J8.5-E3/52 at its rated peak pulse current?
The SMB10J8.5-E3/52 has a maximum clamping voltage (VC) of 14.4 V at 20 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the highest voltage that will appear across the protected circuit during a full-rated surge event. The SMB10J8.5-E3/52 maintains this clamping performance consistently due to its low incremental surge resistance and glass-passivated junction.
Is SMB10J8.5-E3/52 suitable for automotive applications?
Yes, SMB10J8.5-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS modules. Its DO-214AA package meets MSL Level 1 reflow requirements, and its 150 °C maximum junction temperature supports under-hood thermal environments. The SMB10J8.5-E3/52 also complies with JESD 201 Class 1A whisker testing and RoHS directives-key requirements for automotive-grade components.
What does the "E3/52" suffix mean in SMB10J8.5-E3/52?
The "E3" suffix indicates RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards; "52" denotes packaging in 7-inch diameter plastic tape-and-reel format with 750 units per reel. This configuration ensures compatibility with high-speed SMT pick-and-place equipment and supports automated manufacturing workflows for the SMB10J8.5-E3/52.
How does SMB10J8.5-E3/52 differ from bi-directional TVS diodes like SMB8J8.5CA?
The SMB10J8.5-E3/52 is unidirectional and intended for DC rail protection where polarity is fixed (e.g., +12 V to ground), offering 1000 W PPPM. In contrast, SMB8J8.5CA is bi-directional with symmetrical clamping for AC or dual-rail applications but lower 800 W rating. The SMB10J8.5-E3/52 provides tighter VBR tolerance and higher surge capability in the same footprint-making it preferable for single-polarity automotive and industrial DC systems.
What is the thermal resistance of SMB10J8.5-E3/52, and how does it affect PCB layout?
The SMB10J8.5-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, designers must allocate adequate copper area and avoid thermal bottlenecks. The SMB10J8.5-E3/52's RθJL of 20 °C/W further emphasizes the need for short, wide traces to leads to minimize localized heating during transient events.
SMB10J8.5-E3/52 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J8.5-E3/52 FAQ
1.How can I place an order for SMB10J8.5-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J8.5-E3/52 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 SMB10J8.5-E3/52 reliable?
The price and inventory of SMB10J8.5-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J8.5-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J8.5-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J8.5-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J8.5-E3/52?
SMB10J8.5-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J8.5-E3/52 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 SMB10J8.5-E3/52?
For technical support, including SMB10J8.5-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J8.5-E3/52 requirements.
6.How does Aetrix verify that SMB10J8.5-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J8.5-E3/52 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 SMB10J8.5-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J8.5-E3/52?
All SMB10J8.5-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J8.5-E3/52, 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 SMB10J8.5-E3/52 part is unused and in its original packaging.
Return procedure for SMB10J8.5-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J8.5-E3/52 Tags
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