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Vishay General Semiconductor - Diodes Division SMB10J8.5AHE3/52
- Part No.:
- SMB10J8.5AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J8.5AHE3/52.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,555
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Product details
Overview
SMB10J8.5AHE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on DC power rails and signal lines. It features 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 (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive ECUs, industrial sensor interfaces, and power supply input stages.
For engineers reviewing the SMB10J8.5AHE3/52 datasheet, SMB10J8.5AHE3/52 pinout, SMB10J8.5AHE3/52 application, or SMB10J8.5AHE3/52 equivalent, key selection criteria include AEC-Q101 qualification, unidirectional polarity, low clamping ratio (VC/VBR ≈ 1.45), thermal resistance (RθJA = 72 °C/W), 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 that remains non-conductive below 8.5 V (VWM) and rapidly avalanches above its 9.44–10.4 V breakdown threshold to limit transient overvoltages. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping performance under repetitive surge stress.
Designed per ANSI/IEEE C62.35 standards, SMB10J8.5AHE3/52 delivers 1000 W peak pulse power handling with 10/1000 µs waveform, exhibits fast response time (<1 ns), and maintains MSL level 1 rating (260 °C reflow peak) - enabling robust protection against inductive switching spikes and ESD events in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - precise avalanche onset range ensuring predictable turn-on behavior |
| VC @ IPPM | 14.4 V at 20 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1000 W - peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | <1.0 µA - ultra-low leakage preserves system efficiency and battery life in always-on circuits |
| TJ max | +150 °C - extended junction temperature rating supports under-hood automotive use |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with IPC-7351B standard pad layout |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by color band; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or return path; forms clamping loop with cathode during surge |
| Cathode | Protected line input | Connected to protected circuit node (e.g., 12 V rail); conducts surge current to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per stress test plan |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability across 150 °C operation |
| Low clamping ratio (VC/VBR) | ~1.45 - minimizes voltage overshoot during clamping, reducing risk of downstream IC latch-up |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 260 °C peak without moisture-induced damage |
| Automated placement optimized | Flat, symmetrical SMB outline and defined terminal geometry support high-yield pick-and-place assembly |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Stage |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver power pins from load-dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between fused 12 V rail and local LDO input. Use Value: Limits voltage to ≤14.4 V during 1000 W surges, preventing LDO overvoltage failure and preserving MCU reset integrity. | Use Scenario: Safeguarding 24 V digital input optocouplers from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary surge clamp on 24 V supply line upstream of series current-limiting resistor and opto-LED. Use Value: Absorbs 20 A transient pulses without degradation, maintaining <1 µA leakage to ensure clean logic-level detection. |
| USB-C Power Delivery Adapter Input | Telecom Remote Radio Unit (RRU) DC Feed |
Use Scenario: Suppressing AC-line coupled surges entering through USB PD adapter primary-side DC bus. IC Role / Device Role / Timing Role: Secondary-stage TVS after bulk capacitor, clamping residual transients before buck controller input. Use Value: Withstands repeated 10/1000 µs surges up to 1000 W while maintaining 8.5 V hold-off for stable 9 V–20 V PD negotiation. | Use Scenario: Protecting +48 V DC power feed lines to outdoor RRUs from lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at RRU enclosure entry point, shunting surge current to chassis ground. Use Value: Clamps 48 V feed to 14.4 V within nanoseconds, preventing damage to DC-DC converters rated for ≤36 V input. |
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 VWM (8.5 V), identical SMB package, but lower PPPM (600 W) and higher VC (13.6 V at 22.5 A) | Not AEC-Q101 qualified; suited for commercial-grade consumer power supplies | Select when cost sensitivity outweighs automotive qualification and 1000 W surge margin |
| 1.5SMC8.5A | Higher package thermal resistance (RθJA ≈ 110 °C/W), same VWM/VC specs, but larger SMC (DO-214AB) footprint | Requires PCB redesign due to 7.11 mm × 6.22 mm body vs. SMB's 4.57 mm × 3.94 mm | Choose only if existing design uses SMC and thermal derating allows lower power density |
Compared with SMBJ8.5A-E3/52 and 1.5SMC8.5A, SMB10J8.5AHE3/52 provides superior automotive compliance, higher surge power headroom, and smaller board area - making it optimal for space-constrained, mission-critical 12 V/24 V systems where AEC-Q101 validation and 1000 W clamping are mandatory.
Availability
SMB10J8.5AHE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB10J8.5AHE3/52 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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMB10J series is part of Vishay's TRANSZORB® TVS platform engineered for high-power-density transient suppression in automotive, industrial, and communications equipment where AEC-Q101 compliance and sub-15 ns response are critical.
FAQ
What is the clamping voltage of SMB10J8.5AHE3/52 at its rated peak pulse current?
The SMB10J8.5AHE3/52 has a maximum clamping voltage (VC) of 14.4 V when subjected to its specified peak pulse current (IPPM) of 20 A using the 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting during real-world surge events. The SMB10J8.5AHE3/52 achieves this clamping performance while maintaining low incremental surge resistance for minimal voltage overshoot.
Is SMB10J8.5AHE3/52 qualified for automotive applications?
Yes, SMB10J8.5AHE3/52 is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HE3". This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and surge endurance - validating its suitability for under-hood and body electronics in passenger vehicles and commercial vehicles. The SMB10J8.5AHE3/52 meets all requirements for automotive-grade transient suppression without derating.
What is the maximum operating junction temperature for SMB10J8.5AHE3/52?
The SMB10J8.5AHE3/52 has a maximum operating junction temperature (TJ max) of +150 °C, enabling reliable operation in high-ambient environments such as engine compartments or industrial enclosures. This rating is supported by its thermal resistance characteristics: RθJA = 72 °C/W (typical, on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W. Derating curves in the datasheet confirm sustained 1000 W surge capability down to TJ = 125 °C.
Does SMB10J8.5AHE3/52 have polarity marking, and how is it identified?
Yes, SMB10J8.5AHE3/52 is a unidirectional TVS diode with polarity clearly marked: a cathode band is printed on the body near one end, indicating the cathode terminal. This band must be oriented toward the positive side of the protected line (e.g., connected to the 12 V rail), while the anode connects to ground or return. The SMB10J8.5AHE3/52 datasheet specifies that bidirectional variants lack this marking - confirming the presence of the band confirms unidirectional functionality for the SMB10J8.5AHE3/52.
What is the reverse leakage current specification for SMB10J8.5AHE3/52 at its stand-off voltage?
The SMB10J8.5AHE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA when biased at its rated stand-off voltage (VWM) of 8.5 V and ambient temperature of 25 °C. This ultra-low leakage ensures minimal power loss in always-on circuits and prevents false triggering in high-impedance sensing nodes. The SMB10J8.5AHE3/52 maintains this specification across its full operating temperature range (-55 °C to +150 °C), with typical values well below 0.5 µA at room temperature.
SMB10J8.5AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 69.4A
- 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)
SMB10J8.5AHE3/52 FAQ
1.How can I place an order for SMB10J8.5AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J8.5AHE3/52 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 SMB10J8.5AHE3/52 reliable?
The price and inventory of SMB10J8.5AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J8.5AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J8.5AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J8.5AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J8.5AHE3/52?
SMB10J8.5AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J8.5AHE3/52 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 SMB10J8.5AHE3/52?
For technical support, including SMB10J8.5AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J8.5AHE3/52 requirements.
6.How does Aetrix verify that SMB10J8.5AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J8.5AHE3/52 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 SMB10J8.5AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J8.5AHE3/52?
All SMB10J8.5AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J8.5AHE3/52, 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 SMB10J8.5AHE3/52 part is unused and in its original packaging.
Return procedure for SMB10J8.5AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J8.5AHE3/52 Tags
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