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Vishay General Semiconductor - Diodes Division SMB8J8.5C-E3/52
- Part No.:
- SMB8J8.5C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.5C-E3/52.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J8.5C-E3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge clamping on signal and power lines. It features 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 40 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J8.5C-E3/52 datasheet, SMB8J8.5C-E3/52 pinout, SMB8J8.5C-E3/52 application, or SMB8J8.5C-E3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.45), RoHS-compliant matte tin terminations, and MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced transients, and inductive switching spikes without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at VWM), while thermal resistance RθJA = 72 °C/W supports sustained operation up to TJ = 150 °C.
The device complies with ANSI/IEEE C62.35 surge standards and delivers sub-nanosecond response time with low incremental surge resistance. Its 800 W PPPM rating is validated under 10/1000 μs waveform with derating above 25 °C ambient per Figure 2, and it meets J-STD-020 MSL Level 1 for surface-mount reflow processing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before significant leakage; sets safe interface margin for 5 V–9 V logic/sensor rails |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - tight 5% tolerance ensures predictable turn-on during overvoltage events |
| VC @ IPPM | 14.4 V at 40 A - clamping voltage limits downstream IC stress during 800 W transient; clamping ratio = 1.45 |
| PPPM | 800 W (10/1000 μs) - defines single-event surge energy handling capacity for automotive load-dump and ISO 7637-2 compliance |
| ID @ VWM | <1.0 μA - ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes |
| TJ max. | 150 °C - enables deployment in under-hood automotive environments and industrial enclosures without derating |
| Package | DO-214AA (SMB) - industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with two coplanar matte tin-plated leads; no polarity marking for bi-directional configuration; terminals solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge path | No functional distinction - either terminal accepts positive or negative transients; bidirectional conduction enables single-device protection of AC-coupled or floating lines |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bi-directional construction; eliminates risk of incorrect orientation during automated placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensors, and infotainment power rails |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift over 15-year service life in harsh thermal/humidity environments |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without pre-baking - reduces manufacturing cost and avoids moisture-related popcorning |
| Low clamping ratio (VC/VBR) | 1.45 - minimizes voltage overshoot during clamping, protecting 12 V-tolerant microcontrollers and CAN transceivers |
| RoHS-compliant, whisker-tested (JESD 201 Class 1A) | E3 suffix guarantees matte tin plating free of tin whisker growth risk - critical for aerospace and medical-grade systems |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and alternator ripple in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional TVS placed between sensor line and ground, clamping ±100 V transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V ADC inputs and microcontroller GPIOs while maintaining signal fidelity below 8.5 V normal operation. |
Use Scenario: Shielding PLC digital input modules from inductive kickback when switching solenoids, relays, or motors. IC Role / Device Role / Timing Role: Surge suppression on 24 V DC input lines upstream of optocoupler isolation stages. Use Value: Absorbs 800 W surges without degradation, enabling >100,000 switching cycles and eliminating need for external RC snubbers. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired bi-directional TVS on differential pair (A/B lines) referenced to local ground plane. Use Value: Clamps common-mode transients to <15 V while preserving signal integrity up to 10 Mbps due to low junction capacitance (~100 pF at 0 V). |
Use Scenario: Front-end protection for USB 2.0 data lines (D+/D−) in portable audio devices and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp placed directly at USB connector, before ESD-rated PHY. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact) without signal distortion or bit errors, thanks to symmetrical clamping and fast response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA | Same VWM (8.5 V), identical DO-214AA package, but rated for 600 W PPPM (vs. 800 W); lower IPPM (30 A vs. 40 A) | Less robust for ISO 7637-2 Pulse 5a load dump; suitable for lower-energy ESD-only scenarios | Select SMBJ8.5CA only if system-level surge testing confirms 600 W sufficiency and cost optimization is prioritized |
| SMCJ8.5CA | Same VWM and VBR range, but larger DO-214AB (SMC) package; rated for 1500 W PPPM and 120 A IPPM | Overqualified for space-constrained PCBs; requires 2.5× more board area and higher thermal mass | Choose SMCJ8.5CA only when legacy designs mandate higher surge margin or existing layout accommodates SMC footprint |
Compared with SMBJ8.5CA and SMCJ8.5CA, SMB8J8.5C-E3/52 delivers optimal balance of 800 W surge capacity, SMB footprint efficiency, and AEC-Q101 validation - making it the preferred choice for next-generation automotive and industrial modules where size, reliability, and standardized test compliance are jointly constrained.
Availability
SMB8J8.5C-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O conditioning, and telecom line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMB8J8.5C-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 SMB8J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in space-constrained automotive and industrial control systems.
FAQ
What is the clamping voltage of SMB8J8.5C-E3/52 at its rated peak pulse current?
The SMB8J8.5C-E3/52 has a maximum clamping voltage (VC) of 14.4 V at 40 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value reflects worst-case clamping performance under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMB8J8.5C-E3/52 maintains this clamping level consistently across its operational temperature range.
Is SMB8J8.5C-E3/52 suitable for automotive applications?
Yes, SMB8J8.5C-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and validation against temperature cycling, HTRB, and ESD tests confirm suitability for engine control units, ADAS sensor interfaces, and body electronics. The SMB8J8.5C-E3/52 meets requirements for ISO 7637-2 Pulse 1 and Pulse 2b immunity testing.
How does the bi-directional configuration of SMB8J8.5C-E3/52 affect its PCB layout?
The SMB8J8.5C-E3/52 has no polarity marking and functions identically regardless of orientation, simplifying PCB layout and eliminating assembly errors. Engineers can place the SMB8J8.5C-E3/52 symmetrically on differential lines or floating signal paths without concern for anode/cathode alignment. Its DO-214AA footprint matches standard SMB land patterns, and the absence of a cathode band removes orientation-dependent routing constraints.
What is the maximum reverse leakage current for SMB8J8.5C-E3/52 at its stand-off voltage?
The SMB8J8.5C-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 8.5 V stand-off voltage (VWM), measured at 25 °C ambient. This ultra-low leakage preserves signal integrity in high-impedance sensor circuits and minimizes standby power loss in battery-operated systems. Leakage remains below 5.0 μA up to 125 °C, ensuring stable performance across extended temperature ranges.
Does SMB8J8.5C-E3/52 comply with RoHS and lead-free assembly standards?
Yes, SMB8J8.5C-E3/52 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and matte tin plating qualified to JESD 201 Class 1A for whisker resistance. It supports lead-free reflow up to 260 °C peak temperature (MSL Level 1), and its terminations meet J-STD-002 and JESD 22-B102 solderability requirements - making SMB8J8.5C-E3/52 compatible with modern high-reliability manufacturing processes.
SMB8J8.5C-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 15.9V
- Current - Peak Pulse (10/1000µs):
- 50.3A
- Power - Peak Pulse:
- 800W
- 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)
SMB8J8.5C-E3/52 FAQ
1.How can I place an order for SMB8J8.5C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.5C-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 SMB8J8.5C-E3/52 reliable?
The price and inventory of SMB8J8.5C-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 SMB8J8.5C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J8.5C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.5C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.5C-E3/52?
SMB8J8.5C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.5C-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 SMB8J8.5C-E3/52?
For technical support, including SMB8J8.5C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.5C-E3/52 requirements.
6.How does Aetrix verify that SMB8J8.5C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J8.5C-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 SMB8J8.5C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J8.5C-E3/52?
All SMB8J8.5C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.5C-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 SMB8J8.5C-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J8.5C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J8.5C-E3/52 Tags
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