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Diodes Incorporated 3.0SMCJ8.5A-13
- Part No.:
- 3.0SMCJ8.5A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ8.5A-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,266
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Product details
Overview
3.0SMCJ8.5A-13 from Diodes Incorporated is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 8.5V reverse standoff voltage (VRWM), 9.44–10.43V breakdown voltage (VBR), 14.4V maximum clamping voltage (VC) at 208.3A peak pulse current (IPP), and meets IEC-61000-4-2 ESD immunity (30kV air/30kV contact). It is used in automotive infotainment power inputs to clamp load-dump and ISO 7637-2 transients.
For engineers reviewing the 3.0SMCJ8.5A-13 datasheet, 3.0SMCJ8.5A-13 pinout, 3.0SMCJ8.5A-13 application, or 3.0SMCJ8.5A-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse current handling under 10/1000μs waveform, unidirectional polarity requirement, SMC package thermal performance on 8mm² copper land, and compliance with AEC-Q200 stress testing for automotive deployment.
Technical Context
This TVS operates as a silicon avalanche diode that remains high-impedance below VRWM (8.5V) and transitions sharply into low-impedance conduction above VBR (min 9.44V) to shunt surge energy. Its glass-passivated die ensures stable breakdown characteristics and low leakage (≤25μA at VRWM).
The device is rated for 3000W peak pulse power per 10×1000μs waveform, supports 300A non-repetitive forward surge current (IFSM), and maintains operation across –55°C to +150°C junction temperature - enabling use in under-hood automotive environments without derating up to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - sustains 10/1000μs surges without failure; defines maximum transient energy absorption capability |
| Reverse Standoff Voltage (VRWM) | 8.5V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| Breakdown Voltage (VBR) | 9.44–10.43V @ 1.0mA - precise avalanche onset range ensuring reliable triggering before protected circuit damage |
| Clamping Voltage (VC) | 14.4V @ 208.3A - maximum voltage seen by downstream circuit during full-rated surge; determines safe margin for 12V system ICs |
| Peak Pulse Current (IPP) | 208.3A - peak current the device safely conducts during 10/1000μs transient; validates robustness against ISO 7637-2 Pulse 5a |
| Leakage Current (IR) | ≤25μA @ 8.5V - ultra-low off-state current minimizes standby power loss in always-on automotive modules |
| ESD Rating | 30kV air / 30kV contact per IEC-61000-4-2 - protects against human-handling and cable-discharge events in assembly and field use |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic body with matte tin-plated leads; UL 94V-0 flammability rating; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.21g. Cathode band denotes polarity for unidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12V rail); avalanche conduction initiates here when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 3000W peak pulse power | Enables single-device protection against severe automotive load dump (ISO 7637-2 Pulse 5a) without parallel stacking |
| Glass-passivated die construction | Ensures long-term parameter stability and low parametric drift under thermal cycling and humidity stress |
| IEC-61000-4-2 ESD immunity (30kV air/contact) | Eliminates need for secondary ESD protection on board-level interfaces exposed to user ports or connectors |
| RoHS-compliant, halogen- and antimony-free "Green" material set | Meets EU environmental directives and OEM sustainability requirements for automotive and industrial end equipment |
| –55°C to +150°C operating junction temperature | Supports direct placement near heat sources (e.g., power converters) in engine control units and ADAS ECUs |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12V battery-fed infotainment head unit subjected to ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive switch-off). IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converter input; responds within nanoseconds to limit voltage excursion to ≤14.4V. Use Value: Prevents destruction of buck controller ICs rated for 16V absolute maximum, extending field reliability beyond 10-year vehicle lifetime. |
Use Scenario: 24V digital input channel on programmable logic controller exposed to wiring-induced transients during factory maintenance. IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side; clamps fast-rising spikes before they reach isolation barrier. Use Value: Maintains functional safety integrity (IEC 61000-4-4 Level 4) while avoiding false triggering of input status detection logic. |
| Telecom PoE Data Line Protection | Medical Equipment AC/DC Adapter Input |
Use Scenario: Secondary-side 48V DC power line in IEEE 802.3bt Type 4 PoE switch feeding IP cameras with sensitive image sensors. IC Role / Device Role / Timing Role: Unidirectional TVS on PSE output rail; absorbs residual surges not filtered by upstream common-mode chokes. Use Value: Limits voltage overshoot to <15V during 10/1000μs surges, protecting 5V LDO regulators and Ethernet PHYs without adding capacitance. |
Use Scenario: Mains-connected AC/DC adapter for portable ultrasound devices requiring low-leakage, high-reliability surge suppression. IC Role / Device Role / Timing Role: Secondary-side DC bus protector after rectification; guards against capacitor discharge transients during hot-plug events. Use Value: Delivers <25μA leakage at 8.5V, preserving battery runtime in standby mode while meeting IEC 60601-1 creepage/clearance requirements. |
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-13 (Diodes Inc.) | Lower peak power (600W), same VRWM/VBR/VC, SMB package (smaller footprint, lower thermal mass) | Not suitable for ISO 7637-2 Pulse 5a; limited to IEC 61000-4-4 Level 3 or lower-energy transients | Select only when space-constrained and surge threat level is confirmed ≤600W |
| 1.5SMCJ8.5A-13 (ON Semiconductor) | Identical electrical specs (VRWM=8.5V, VC=14.4V, IPP=208A), same SMC package, but qualified to AEC-Q200 Grade 0 (–40°C to +150°C) | Approved for higher-reliability automotive modules where extended temperature qualification is mandated | Prefer when AEC-Q200 documentation traceability and PPAP support are contractually required |
Compared with SMBJ8.5A-13, the 3.0SMCJ8.5A-13 delivers 5× higher surge energy handling essential for automotive load dump; versus 1.5SMCJ8.5A-13, it offers identical clamping performance but lacks formal AEC-Q200 Grade 0 certification - making it suitable for cost-sensitive Tier 2 automotive or industrial applications where full qualification is not enforced.
Availability
3.0SMCJ8.5A-13 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC I/O hardening, and telecom PoE secondary-side surge suppression requiring stable component supply and consistent SMC tape-and-reel delivery.
Supply support for 3.0SMCJ8.5A-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for automotive, industrial, and computing markets.
The 3.0SMCJ series belongs to Diodes' high-power TVS portfolio, engineered specifically for robust transient suppression in harsh environments - emphasizing low clamping voltage, repeatable avalanche behavior, and AEC-Q200-compatible process flow for automotive-grade resilience.
FAQ
What is the maximum clamping voltage of the 3.0SMCJ8.5A-13 under full-rated surge conditions?
The maximum clamping voltage (VC) is 14.4V at 208.3A peak pulse current, measured using the standardized 10×1000μs waveform. This value represents the highest voltage imposed on the protected circuit during worst-case transient events and is guaranteed across the full operating temperature range (–55°C to +150°C).
Is the 3.0SMCJ8.5A-13 suitable for bidirectional signal line protection?
No - the "A" suffix denotes unidirectional configuration with a cathode band; it conducts only for positive transients on the cathode side. For bidirectional protection (e.g., RS-485, USB D+/D–), the "CA" variant (e.g., 3.0SMCJ8.5CA-13) must be used, which has symmetrical breakdown in both polarities and no polarity marking.
How does the SMC package affect thermal performance in high-current surge events?
The SMC package provides superior thermal dissipation versus smaller packages like SMA or SMB due to its larger copper pad area (recommended 8.00mm² per lead) and lower junction-to-board thermal resistance. This enables sustained 3000W pulse handling without thermal runaway, provided PCB layout follows Diodes' suggested pad dimensions and uses internal ground planes for heat spreading.
Does the 3.0SMCJ8.5A-13 meet automotive qualification standards out of the box?
It is manufactured in IATF 16949-certified facilities and qualified to JEDEC reliability standards referenced in AEC-Q, but it is not formally certified to AEC-Q200 unless ordered with a Q-suffix (e.g., 3.0SMCJ8.5AQ-13). Customers requiring full PPAP documentation and Grade 0/1 temperature validation must specify the Q-grade version.
3.0SMCJ8.5A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AB, SMC
- Series:
- 3.0SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 208.3A
- Power - Peak Pulse:
- 3000W (3kW)
- 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:
- SMC
3.0SMCJ8.5A-13 FAQ
1.How can I place an order for 3.0SMCJ8.5A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ8.5A-13 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 3.0SMCJ8.5A-13 reliable?
The price and inventory of 3.0SMCJ8.5A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ8.5A-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ8.5A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ8.5A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ8.5A-13?
3.0SMCJ8.5A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ8.5A-13 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 3.0SMCJ8.5A-13?
For technical support, including 3.0SMCJ8.5A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ8.5A-13 requirements.
6.How does Aetrix verify that 3.0SMCJ8.5A-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ8.5A-13 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 3.0SMCJ8.5A-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ8.5A-13?
All 3.0SMCJ8.5A-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ8.5A-13, 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 3.0SMCJ8.5A-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ8.5A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ8.5A-13 Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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