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Diodes Incorporated 3.0SMCJ85AQ-13
- Part No.:
- 3.0SMCJ85AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ85AQ-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,099
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Product details
Overview
3.0SMCJ85AQ-13 from Diodes Incorporated is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in automotive power rails and industrial DC inputs. It features a 85V reverse standoff voltage (VRWM), 94.4V minimum breakdown voltage (VBR), 137V maximum clamping voltage (VC) at 21.9A peak pulse current (IPP), and IEC-61000-4-2 ESD immunity of 30kV (air/contact). It is used to safeguard 24V/48V battery-fed ECUs against load dump and ISO 7637-2 transients.
For engineers reviewing the 3.0SMCJ85AQ-13 datasheet, 3.0SMCJ85AQ-13 pinout, 3.0SMCJ85AQ-13 application, or 3.0SMCJ85AQ-13 equivalent, key selection criteria include clamping voltage margin relative to system rail, peak pulse current capability under 10/1000μs waveform, thermal derating above +25°C ambient, and AEC-Q101 qualification status for automotive deployment.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 94.4–104.3V breakdown range at 1.0mA test current. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<5μA at 85V VRWM).
It sustains 3000W non-repetitive peak pulse power per 10×1000μs waveform, with thermal derating beginning at +25°C and full derating to zero at +150°C ambient. The device is rated for -55°C to +150°C operating junction temperature and complies with AEC-Q101 stress testing for automotive reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - withstands ISO 7637-2 Pulse 5a (load dump) without failure |
| Reverse Standoff Voltage | 85V - blocks normal 24V/48V system operation while allowing margin for ripple and transients |
| Clamping Voltage | 137V max at 21.9A - limits downstream IC voltage during 10/1000μs surge to safe level |
| Breakdown Voltage | 94.4–104.3V at 1.0mA - defines precise conduction onset threshold for predictable protection timing |
| ESD Rating | 30kV air / 30kV contact per IEC-61000-4-2 - protects against human handling events in assembly and service |
| Operating Temperature | -55°C to +150°C - supports under-hood automotive placement and industrial high-temp environments |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when voltage exceeds VBR |
| Anode | Reference/ground return path | Must be low-inductance connection to system ground plane to minimize clamping overshoot |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP support, IATF 16949 manufacturing, and change control |
| Glass-passivated die | Ensures stable VBR over temperature and lifetime, with <5μA IR at VRWM |
| 3000W peak pulse rating | Handles worst-case load dump (ISO 7637-2 Pulse 5a) on 24V/48V systems |
| RoHS-compliant & "Green" | Halogen- and antimony-free; <900ppm Br/Cl, <1000ppm Sb - meets global environmental mandates |
Applications
| Automotive Body Control Module | Industrial PLC Power Input |
|---|---|
Use Scenario: Protecting 24V supply rail of BCM against load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤137V, preventing damage to 100V-rated input capacitors and LDOs. |
Use Scenario: Safeguarding 48V auxiliary power input in programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: Fast-response shunt protector activated within nanoseconds of overvoltage event. Use Value: Clamps 10/1000μs surges up to 21.9A without degradation, ensuring uninterrupted operation. |
| Telecom Remote Radio Unit | EV Onboard Charger Interface |
Use Scenario: Shielding 48V backplane interface in outdoor RRU enclosures from lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS after gas discharge tube (GDT) front-end filtering. Use Value: Provides low-clamp precision after GDT crowbarring, preserving signal integrity on management lines. |
Use Scenario: Protecting CAN FD and HV sense lines entering OBC from coupled transients during AC/DC conversion. IC Role / Device Role / Timing Role: Unidirectional clamp isolating sensitive communication and feedback circuits from power-stage noise. Use Value: Maintains <5μA leakage at 85V, avoiding false triggering or bias current errors in precision sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ85A-13-F | Lower peak power (400W), same VRWM (85V), higher VC (139V), SMA package (smaller thermal mass) | Not suitable for load dump; limited to ESD and low-energy transients in space-constrained consumer designs | Select only for cost-sensitive, non-automotive applications with <5A IPP requirements |
| 1.5SMC85A-Q | Same 3000W rating and SMC package, but AEC-Q101 certified with tighter VBR tolerance (±5% vs ±6.5%) | Identical functional role; preferred where PPAP documentation and extended reliability validation are mandatory | Choose when full automotive traceability and extended temperature life testing are required |
Compared with SMAJ85A-13-F, 3.0SMCJ85AQ-13 delivers 7.5× higher surge energy handling and automotive-grade thermal robustness; versus 1.5SMC85A-Q, it offers identical performance but with Diodes' Q-suffix change control and documented IATF 16949 sourcing.
Availability
3.0SMCJ85AQ-13 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom remote radio units, and EV onboard charger interfaces requiring stable component supply across long production lifecycles.
Supply support for 3.0SMCJ85AQ-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.
The 3.0SMCJ series is engineered for automotive and industrial transient suppression, with AEC-Q101 qualification, robust thermal design, and compliance with ISO 7637-2 and IEC 61000-4-2 standards.
FAQ
What does the 'Q' suffix in 3.0SMCJ85AQ-13 indicate?
The 'Q' suffix denotes AEC-Q101 qualification, meaning the device has passed stress tests for automotive applications including temperature cycling, highly accelerated life testing, and ESD. It is manufactured in IATF 16949-certified facilities and supports PPAP documentation for OEM programs.
Can 3.0SMCJ85AQ-13 replace a bidirectional TVS in a 24V system?
No - this is a unidirectional device with cathode marking and designed for DC systems with defined polarity. Using it in place of a bidirectional TVS on AC-coupled or polarity-agnostic lines risks failure during reverse-voltage transients. Select 3.0SMCJ85CA-13 for bidirectional operation.
How does thermal derating affect clamping performance at +105°C ambient?
At +105°C, peak pulse power drops to ~65% of rated 3000W (≈1950W), reducing maximum sustainable IPP to ~14.2A. Clamping voltage remains stable, but sustained surge repetition must be reduced to avoid junction overheating and parametric shift.
Is the SMC package compatible with standard reflow profiles for lead-free assembly?
Yes - the SMC package is rated for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260°C. Its moisture sensitivity level 1 allows unlimited floor life, eliminating bake requirements before assembly.
3.0SMCJ85AQ-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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 21.9A
- Power - Peak Pulse:
- 3000W (3kW)
- 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:
- SMC
3.0SMCJ85AQ-13 FAQ
1.How can I place an order for 3.0SMCJ85AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ85AQ-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 3.0SMCJ85AQ-13 reliable?
The price and inventory of 3.0SMCJ85AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ85AQ-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ85AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ85AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ85AQ-13?
3.0SMCJ85AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ85AQ-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 3.0SMCJ85AQ-13?
For technical support, including 3.0SMCJ85AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ85AQ-13 requirements.
6.How does Aetrix verify that 3.0SMCJ85AQ-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ85AQ-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 3.0SMCJ85AQ-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ85AQ-13?
All 3.0SMCJ85AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ85AQ-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 3.0SMCJ85AQ-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ85AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ85AQ-13 Tags
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ESD9B5.0ST5G
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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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Diodes Incorporated
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Diodes Incorporated
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