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Vishay General Semiconductor - Diodes Division SMBJ8.5C-E3/52
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- Part No.:
- SMBJ8.5C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.5C-E3/52.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,695
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Product details
Overview
SMBJ8.5C-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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 41.7 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMBJ8.5C-E3/52 datasheet, SMBJ8.5C-E3/52 pinout, SMBJ8.5C-E3/52 application, or SMBJ8.5C-E3/52 equivalent, this device is selected for robust overvoltage protection on DC power rails, I/O lines, and MOSFET gate drivers where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification readiness are critical.
Technical Context
The SMBJ8.5C-E3/52 operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling precise clamping during transient events.
It delivers 600 W peak pulse power handling under standardized 10/1000 µs waveform conditions, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation up to 150 °C junction temperature in properly laid-out PCBs with 5.0 mm × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin below system rail voltage. |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - Confirmed breakdown range defining turn-on threshold with tight ±5% tolerance. |
| VC @ IPPM | 14.4 V at 41.7 A - Clamped voltage during 600 W transient; limits stress on downstream ICs and MOSFETs. |
| PPPM | 600 W - Peak pulse power capability with 10/1000 µs waveform; meets IEC 61000-4-5 Level 4 surge immunity requirements. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports high-energy fault clearing in power circuits. |
| TJ max | 150 °C - Maximum junction temperature; enables use in automotive under-hood and industrial motor drive environments. |
| Package | SMB (DO-214AA) - Surface-mount package with 0.220" x 0.155" footprint; compatible with automated placement and reflow soldering per J-STD-020 MSL level 1. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, polarity indicated by cathode band. 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 |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side (e.g., ground or return path); defines directionality of clamping action. |
| Cathode | Reverse voltage input / Clamping output | Connected to protected line (e.g., +12 V rail); conducts avalanche current when VAK > VBR, shunting surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables protection against severe IEC 61000-4-5 surges without derating in standard PCB layouts. |
| 14.4 V clamping voltage at 41.7 A | Provides <1.7× VWM clamping ratio, minimizing overvoltage exposure to downstream logic and analog circuitry. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and lifetime stress. |
| MSL level 1 moisture sensitivity | Eliminates bake requirement prior to reflow; supports direct placement into high-volume SMT production. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance mandates without halogen restrictions; suitable for consumer and industrial applications. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges above 13.5 V. Use Value: Limits peak voltage to 14.4 V during 600 W transients, preventing damage to microcontrollers and CAN transceivers operating at 12 V nominal. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected between signal line and ground to absorb sub-100 ns ESD pulses per IEC 61000-4-2. Use Value: Sub-1 ns response time and 14.4 V clamping prevent latch-up or parametric shift in precision op-amps and ADC front-ends. |
| DC Motor Drive Gate Protection | Telecom Power Supply Input Stage |
Use Scenario: Safeguarding N-channel MOSFET gates driven by PWM controllers in brushed DC motor modules. IC Role / Device Role / Timing Role: TVS placed between gate and source to suppress Miller-induced voltage spikes during fast switching transitions. Use Value: Low clamping voltage (14.4 V) prevents gate oxide overstress while maintaining compatibility with 10–15 V gate drive rails. | Use Scenario: Front-end surge suppression on 48 V telecom rectifier inputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary unidirectional TVS on DC input bus, coordinated with MOVs and fuses for staged protection. Use Value: 600 W rating and 100 A IFSM support coordination with upstream overcurrent devices without thermal runaway. |
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 | Identical electrical specs and package; differs only in marking code (A vs C suffix denotes same unidirectional variant). | No functional difference; both rated for same VWM, VBR, VC, and PPPM. | Select based on distributor stock availability; no design change required. |
| SMCJ8.5A-E3/52 | Same VWM and VBR, but larger SMC (DO-214AB) package with 1500 W PPPM and higher IPPM (71.4 A). | Better suited for higher-energy surge environments (e.g., outdoor telecom, solar inverters) where PCB space allows larger footprint. | Choose SMCJ8.5A-E3/52 only if system-level surge testing exceeds 600 W or layout accommodates 27% larger body size. |
Compared with SMBJ8.5A-E3/52, the SMBJ8.5C-E3/52 offers identical protection performance in the same SMB package; versus SMCJ8.5A-E3/52, it trades peak power headroom for compactness-ideal for space-constrained automotive and portable industrial modules.
Availability
SMBJ8.5C-E3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, DC motor drive gate protection, and telecom power supply input stage applications requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMBJ8.5C-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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series is engineered for high-speed transient suppression in automotive, industrial, and communications systems where consistent clamping, low leakage, and AEC-Q101 qualification readiness are essential design requirements.
FAQ
What is the breakdown voltage range of SMBJ8.5C-E3/52?
The SMBJ8.5C-E3/52 has a guaranteed breakdown voltage (VBR) range of 9.44 V to 10.4 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This tight ±5% tolerance ensures predictable turn-on behavior across temperature and production lots, directly supporting robust overvoltage protection design for 12 V systems.
Is SMBJ8.5C-E3/52 suitable for automotive applications?
SMBJ8.5C-E3/52 is RoHS-compliant and manufactured to Vishay's commercial-grade specifications. While not AEC-Q101 qualified itself, it shares identical die and construction with AEC-Q101 variants (e.g., SMBJ8.5AHE3). For non-safety-critical automotive subsystems like body control modules or infotainment power rails, SMBJ8.5C-E3/52 provides proven transient suppression performance with full traceability and MSL level 1 handling.
What is the maximum clamping voltage of SMBJ8.5C-E3/52 under surge conditions?
The SMBJ8.5C-E3/52 clamps to a maximum of 14.4 V at its rated peak pulse current of 41.7 A (10/1000 µs waveform). This value is measured under standardized test conditions with 0.2" × 0.2" copper pads and represents the upper limit of voltage seen by protected circuitry during worst-case transients-critical for ensuring compatibility with 15 V-tolerant ICs and MOSFETs.
Does SMBJ8.5C-E3/52 have polarity markings, and how is it oriented in circuit?
Yes, SMBJ8.5C-E3/52 uses a cathode band to indicate polarity. The banded end is the cathode and must be connected to the line being protected (e.g., +12 V rail), while the anode connects to ground or the return path. This orientation ensures unidirectional clamping-conducting only during positive transients-and prevents unintended conduction during normal forward-biased operation.
How does SMBJ8.5C-E3/52 compare to bidirectional TVS diodes like SMBJ8.5CA-E3/52?
SMBJ8.5C-E3/52 is unidirectional and optimized for DC rail protection where polarity is fixed; SMBJ8.5CA-E3/52 is bidirectional and used for AC or floating signal lines. The unidirectional SMBJ8.5C-E3/52 offers lower leakage (<1 μA at 8.5 V) and higher surge current capability in one direction, making it preferable for 12 V automotive and industrial power applications where reverse conduction is unnecessary and leakage must be minimized.
SMBJ8.5C-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):
- 37.7A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ8.5C-E3/52 FAQ
1.How can I place an order for SMBJ8.5C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.5C-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 SMBJ8.5C-E3/52 reliable?
The price and inventory of SMBJ8.5C-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 SMBJ8.5C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ8.5C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.5C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.5C-E3/52?
SMBJ8.5C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.5C-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 SMBJ8.5C-E3/52?
For technical support, including SMBJ8.5C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.5C-E3/52 requirements.
6.How does Aetrix verify that SMBJ8.5C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ8.5C-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 SMBJ8.5C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ8.5C-E3/52?
All SMBJ8.5C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.5C-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 SMBJ8.5C-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ8.5C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.5C-E3/52 Tags
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