Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

STMicroelectronics SMC30J6.5CA

Name: SMC30J6.5CA
Brand: STMicroelectronics
SKU: SMC30J6.5CA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SMC30J6.5CA

Manufacturer:: STMicroelectronics

Category:: TVS Diodes

Package:: DO-214AB, SMC

Datasheet:: SMC30J6.5CA.pdf

Description:: TVS DIODE 6.5VWM 11.2VC SMC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,087

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SMC30J6.5CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-reliability ESD and surge protection in power rails and signal lines. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 11.2 V (max) under 268 A surge current, and operates up to 175 °C junction temperature - enabling use in automotive engine control units, industrial PLC I/O modules, and PoE-powered Ethernet switches.

For engineers reviewing the SMC30J6.5CA datasheet, SMC30J6.5CA pinout, SMC30J6.5CA application, or SMC30J6.5CA equivalent, key selection criteria include bidirectional standoff voltage (6.5 V), low leakage (≤0.2 µA at 25 °C), JEDEC-registered SMC package compatibility, and IEC 61000-4-2 ±30 kV contact discharge compliance.

Technical Context

This planar-junction TVS diode uses silicon avalanche technology to provide symmetric clamping for both polarities, with dynamic resistance of 4.77 mΩ at 25 °C - critical for minimizing voltage overshoot during fast transients like EFT (IEC 61000-4-4 level 4, 4 kV). Its thermal coefficient α_T = 10.1 × 10⁻⁴/°C enables accurate V_BR and V_CL derating across −55 °C to +175 °C operating range.

The device meets J-STD-020 MSL level 1 moisture sensitivity, supports lead-free reflow per JEDEC J-STD-020 profile (peak 240–245 °C), and features matte tin plating for solderability and whisker resistance (JESD-201 class 2). Its 150 pF junction capacitance at 1 V reverse bias suits moderate-speed data lines without signal integrity degradation.

Key Specifications

Parameter	Value and Actual Design Meaning
Standoff Voltage (VRM)	6.5 V - maximum continuous reverse working voltage before significant leakage; defines minimum system rail margin for safe operation.
Breakdown Voltage (VBR min)	7.2 V at 1 mA - guaranteed avalanche initiation threshold; ensures predictable turn-on during overvoltage events.
Clamping Voltage (VCL max)	11.2 V at 268 A (10/1000 μs) - peak voltage seen by protected circuit during worst-case surge; determines downstream component stress.
Peak Pulse Power (PPP)	3000 W (10/1000 μs) - energy-handling capability for standard lightning/surge waveforms; validates robustness in industrial environments.
Leakage Current (IRM max)	0.2 µA at VRM and 25 °C - ultra-low standby loss; essential for battery-backed or low-power sensor nodes.
Junction Temperature Range	−55 °C to +175 °C - extended thermal envelope supports under-hood automotive and high-temperature industrial deployments.
ESD Rating	±30 kV (IEC 61000-4-2, contact & air discharge) - exceeds level 4 immunity; eliminates need for secondary ESD protection stages.

Pinout & Package

SMC30J6.5CA is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package with matte tin-plated leads, 0.25 g mass, and IPC-7531-compliant footprint. The package measures 5.55–6.25 mm (D) × 7.75–8.15 mm (E) × 1.90–2.45 mm (A1) and supports automated placement and reflow.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Transient current sink (negative polarity)	Conducts during negative surges; forms symmetrical clamping path with cathode in bidirectional configuration.
Cathode (Pin 2)	Transient current sink (positive polarity)	Conducts during positive surges; enables full-cycle protection without external polarity management.

Key Features

Feature	Design Value
Bidirectional clamping	Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN FD) without polarity constraints.
Low dynamic resistance (RD)	4.77 mΩ at 25 °C - minimizes clamping voltage rise under high di/dt, reducing stress on downstream ICs during fast transients.
High-temperature reliability	Rated for 175 °C T_j - maintains specified V_BR, V_CL, and leakage performance in under-hood or enclosed industrial enclosures.
JEDEC-compliant SMC package	Ensures mechanical interoperability with standard pick-and-place equipment and PCB footprints across global manufacturing sites.
UL94 V0 flammability rating	Validates polymer housing resistance to ignition and flame propagation - required for safety-certified industrial and medical systems.

Applications

Automotive Engine Control Unit (ECU)

Industrial PLC Digital Input Module

Use Scenario: Protecting 5 V sensor supply rails and LIN bus lines from load dump and ISO 7637-2 pulses.

IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt transients before reaching MCU GPIO or analog front-end.

Use Value: Withstands 175 °C ambient and clamps ≤11.2 V at 268 A, preventing brownout or latch-up in critical engine timing circuits.

Use Scenario: Safeguarding 24 V DC digital input channels against field-wiring induced surges and ESD during maintenance.

IC Role / Device Role / Timing Role: Primary surge suppressor on input terminal block, coordinated with upstream fuse and downstream optocoupler isolation.

Use Value: 3000 W peak power rating handles repetitive 1 kV/500 A surges per IEC 61000-4-4, extending module service life in factory-floor environments.

Power over Ethernet (PoE) Switch Port

Medical Patient Monitor Signal Interface

Use Scenario: Protecting 48 V PSE output pairs and 100BASE-TX data lines from cable-induced surges and hot-plug ESD.

IC Role / Device Role / Timing Role: Dual-role protector: clamps common-mode surges on power pairs and differential ESD on twisted-pair data lanes.

Use Value: ±30 kV IEC 61000-4-2 rating and 150 pF capacitance preserve signal integrity up to 100 MHz while meeting UL 60950-1 creepage requirements.

Use Scenario: Shielding isolated analog sensor inputs (e.g., ECG, SpO₂) from defibrillator-induced transients and clinical ESD events.

IC Role / Device Role / Timing Role: Final-stage protector after isolation barrier, ensuring patient-connected circuits remain below 10 µA leakage per IEC 60601-1.

Use Value: 0.2 µA max leakage at 25 °C and biocompatible matte tin plating meet stringent safety and biocompatibility mandates.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional TVS diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ6.5CA (STMicroelectronics)	Lower PPP (600 W vs. 3000 W); same VRM/VBR/VCL but reduced surge current handling (109 A vs. 268 A).	Suitable for consumer-grade USB or UART lines; insufficient for industrial 24 V I/O or PoE power rails.	Select when space-constrained SMB package is mandatory and surge energy is limited to <100 mJ.
SAC30J6.5CA (Littelfuse)	Identical PPP (3000 W), VRM (6.5 V), and VCL (11.2 V); slightly higher leakage (1 µA vs. 0.2 µA) and lower Tj max (150 °C vs. 175 °C).	Acceptable for commercial-temperature applications; not recommended for under-hood automotive or high-ambient industrial use.	Choose for cross-supplier BOM diversification where 175 °C operation is not required and leakage tolerance >0.2 µA is acceptable.

Compared with SMBJ6.5CA, SMC30J6.5CA provides 5× higher surge energy handling and superior high-temperature stability; versus SAC30J6.5CA, it offers tighter leakage control and extended junction temperature capability - making it optimal for mission-critical industrial and automotive protection.

Availability

SMC30J6.5CA is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, Power over Ethernet switch ports, and medical patient monitor interfaces requiring stable component supply across long production lifecycles.

Supply support for SMC30J6.5CA 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with vertical manufacturing and broad IP portfolio.

The SMC30J TVS series targets high-energy transient protection in harsh environments, emphasizing thermal robustness, JEDEC-compliant packaging, and compliance with IEC 61000-4-2/4-4 for automotive and industrial safety-critical systems.

FAQ

What is the maximum clamping voltage of SMC30J6.5CA under a 10/1000 μs surge?

The maximum clamping voltage (V_CL) is 11.2 V at 268 A for a 10/1000 μs waveform, measured at T_amb = 25 °C. This value increases with junction temperature per the α_T coefficient (10.1 × 10⁻⁴/°C), reaching approximately 12.1 V at T_j = 125 °C using the formula V_CL(T_j) = V_CL(25 °C) × [1 + α_T × (T_j − 25)].

Is SMC30J6.5CA suitable for protecting CAN FD bus lines?

Yes - its bidirectional architecture, 11.2 V clamping voltage, and 150 pF junction capacitance at 1 V allow direct placement on CAN FD differential pairs (CANH/CANL) without degrading signal integrity up to 5 Mbps. It meets IEC 61000-4-2 ±30 kV ESD and IEC 61000-4-4 level 4 surge immunity required for automotive CAN networks.

How does the SMC package of SMC30J6.5CA compare to SMA in thermal performance?

The SMC package offers ~30% lower thermal resistance than SMA due to larger copper pad area (E = 7.75–8.15 mm vs. SMA's ~4.5 mm) and higher thermal mass, enabling 3000 W dissipation at T_j = 25 °C. At 175 °C T_j, SMC sustains ~2100 W versus ~1400 W for SMA - critical for sustained surge duty cycles in industrial controls.

Does SMC30J6.5CA require derating for elevated ambient temperatures?

Yes - peak pulse power must be derated linearly above 25 °C ambient per Figure 3 in DS8598: at 85 °C T_amb, PPP drops to ~2200 W for V_BR < 36 V devices. Derating is calculated using Z_th(j-a) curves and board copper area; for FR4 with 2 cm² copper per lead, R_th(j-a) ≈ 35 °C/W, limiting continuous power dissipation to ~3.5 W at 85 °C ambient.

SMC30J6.5CA Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: DO-214AB, SMC

Series:: SMC30J

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 6.5V

Voltage - Breakdown (Min):: 7.2V

Voltage - Clamping (Max) @ Ipp:: 11.2V

Current - Peak Pulse (10/1000µs):: 268A

Power - Peak Pulse:: 3000W (3kW)

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMC

SMC30J6.5CA FAQ

1.How can I place an order for SMC30J6.5CA through Aetrix?

Please submit a Request for Quotation (RFQ) for SMC30J6.5CA 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 SMC30J6.5CA reliable?

The price and inventory of SMC30J6.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC30J6.5CA is usually 5 days.

3.What payment methods are accepted for SMC30J6.5CA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC30J6.5CA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMC30J6.5CA?

SMC30J6.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMC30J6.5CA 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 SMC30J6.5CA?

For technical support, including SMC30J6.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC30J6.5CA requirements.

6.How does Aetrix verify that SMC30J6.5CA is sourced from the original manufacturer or authorized distributors?

All SMC30J6.5CA 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 SMC30J6.5CA meets industry standards.

7.What is the process for return or replacement of SMC30J6.5CA?

All SMC30J6.5CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC30J6.5CA, 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 SMC30J6.5CA part is unused and in its original packaging.

Return procedure for SMC30J6.5CA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …