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Diodes Incorporated SMBJ70CA-13-F
- Part No.:
- SMBJ70CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70CA-13-F.pdf
- Description:
- TVS DIODE 70VWM 113VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:9,779
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Product details
Overview
SMBJ70CA-13-F from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in SMB package, designed for overvoltage protection of DC power lines and signal interfaces. It features 70 V reverse standoff voltage (VRWM), 77.8–89.5 V breakdown voltage (VBR), 113 V maximum clamping voltage (VC) at 5.3 A peak pulse current (IPP), and 600 W peak pulse power dissipation - deployed in industrial power supplies, automotive body control modules, and Ethernet PHY protection circuits.
For engineers reviewing the SMBJ70CA-13-F datasheet, SMBJ70CA-13-F pinout, SMBJ70CA-13-F application, or SMBJ70CA-13-F equivalent, key selection criteria include clamping performance under 8.3 ms surge, bi-directional symmetry for AC-coupled lines, thermal derating above +25°C, and RoHS-compliant matte tin termination compatibility with lead-free reflow profiles.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical clamping behavior during positive and negative transients - critical for protecting balanced interfaces like RS-485 or CAN bus stubs. Its glass-passivated junction ensures stable leakage (<5 µA at VRWM) and repeatable breakdown characteristics over temperature (-55°C to +150°C).
The device uses a single-junction avalanche structure optimized for fast response (<1 ns), low dynamic impedance, and minimal capacitance (≈100 pF at 1 MHz, zero bias). It complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity requirements when applied with appropriate series impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - sustains 8.3 ms half-sine surge without failure; enables robust protection against lightning-induced surges per IEC 61000-4-5 Level 3 (1 kV/2 Ω). |
| Reverse Standoff Voltage | 70 V - maximum continuous DC or RMS AC voltage before significant leakage; sets operating margin for 48 V industrial bus systems. |
| Breakdown Voltage | 77.8–89.5 V @ 1 mA - tight VBR window ensures predictable turn-on and avoids false triggering during normal line transients. |
| Clamping Voltage | 113 V @ 5.3 A - limits downstream voltage stress during surge; supports 3.3 V/5 V logic interface survival with ≤100 Ω series resistance. |
| Leakage Current | ≤5 µA @ 70 V - negligible standby power loss and no measurable impact on high-impedance sensor inputs or reference nodes. |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated placement; 3.3–3.94 mm width, 4.06–4.57 mm length, 1.96–2.21 mm height; UL 94V-0 rated. |
Pinout & Package
Two-terminal SMB (DO-214AA) package with symmetrical bi-directional construction - no polarity marking or cathode band. Terminals are co-planar matte tin-plated leads, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical avalanche behavior in both directions; connects across protected line and return (e.g., CAN_H–CAN_L or RS-485 A–B). |
| Cathode Band (absent) | N/A - bi-directional device | No polarity indicator required; eliminates orientation errors during assembly and simplifies layout for differential pairs. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse rating | Enables single-device protection against 1 kV/2 Ω combination wave surges without parallel staging or derating. |
| Glass-passivated die | Ensures long-term parameter stability under humidity, thermal cycling, and high-temperature storage (up to +175°C storage). |
| Bi-directional symmetry | Supports AC-coupled or floating interfaces (e.g., telecom line cards, isolated RS-485) without external polarity management. |
| RoHS & Halogen-Free | Meets EU RoHS 2 (2011/65/EU) and green compliance (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb); suitable for automotive and medical end equipment. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 48 V DC input rail in programmable logic controllers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converter input stage. Use Value: Limits transient voltage to ≤113 V, preventing MOSFET gate oxide rupture and enabling use of lower-voltage-rated input capacitors. |
Use Scenario: LIN bus transceiver supply line subjected to battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Bidirectional shunt protector between VBAT and GND, absorbing reverse polarity energy. Use Value: Withstands −14 V reverse bias indefinitely and clamps +100 V surges within 1 ns, preserving transceiver integrity. |
| RS-485 Data Line Protection | Ethernet PHY Interface |
Use Scenario: Full-duplex RS-485 transceivers in factory automation networks subject to ESD and cable discharge events. IC Role / Device Role / Timing Role: Differential pair clamp (A–B) referenced to local ground, placed adjacent to connector. Use Value: 100 pF capacitance adds <0.5% signal distortion at 10 Mbps; clamping action preserves common-mode range and receiver threshold margins. |
Use Scenario: 10/100BASE-TX magnetics secondary side where PHY pins connect to RJ45 jack. IC Role / Device Role / Timing Role: Bi-directional TVS across each data pair (TD+, TD−, RD+, RD−) to suppress induced surges. Use Value: Matches IEEE 802.3af surge immunity requirements; low leakage prevents bias drift in transformer-coupled receive paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA TR13 | Same electrical specs and SMB package; tape-and-reel packaging differs (TR13 = 5,000/reel vs. -13-F = 3,000/reel). | No functional difference; used interchangeably where reel size aligns with SMT line feed requirements. | Select -13-F for standard 3k reels; TR13 preferred for high-volume production with larger feeder capacity. |
| P6SMB70CA | Same VRWM (70 V), VBR (77.8–89.5 V), VC (113 V), but lower PPK = 600 W (same rating) and higher IR (≤10 µA) due to older process. | Valid drop-in replacement in legacy designs; slightly higher leakage may affect ultra-low-power sensor nodes. | Prefer SMBJ70CA-13-F for new designs requiring tighter leakage spec and latest green compliance (halogen/antimony free). |
Compared with P6SMB70CA and SMBJ70CA TR13, SMBJ70CA-13-F delivers identical surge clamping performance with stricter leakage control and full halogen-free certification - making it optimal for next-generation industrial and automotive platforms requiring extended reliability and environmental compliance.
Availability
SMBJ70CA-13-F is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, RS-485 data line protection, and Ethernet PHY interface applications requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.
Supply support for SMBJ70CA-13-F 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
SMBJxxCA devices belong to Diodes' Transient Voltage Suppressor portfolio, engineered specifically for high-energy surge suppression in harsh environments - emphasizing low clamping ratio, repeatable avalanche behavior, and long-term reliability in automotive, industrial, and telecom infrastructure.
FAQ
What is the maximum clamping voltage of SMBJ70CA-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 113 V at 5.3 A peak pulse current (IPP), measured using an 8.3 ms single half-sine waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (−55°C to +150°C) and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMBJ70CA-13-F suitable for protecting CAN FD bus lines?
Yes - its bi-directional symmetry, 113 V clamping voltage, and <1 ns response time make it suitable for CAN FD physical layer protection. When placed across CAN_H and CAN_L with series impedance ≤2 Ω, it suppresses ESD (±15 kV contact) and surge (ISO 16750-2) without distorting bit timing or exceeding common-mode voltage limits.
Does SMBJ70CA-13-F require heatsinking in typical applications?
No - its steady-state power dissipation is only 5.0 W at TL = +75°C, and normal operation involves only transient conduction. In continuous DC applications below VRWM, power dissipation is negligible (<0.35 mW at 5 µA leakage × 70 V). Heatsinking is unnecessary unless mounted in extreme ambient (>+105°C) with sustained high-frequency surge repetition.
How does the "C" suffix in SMBJ70CA-13-F affect its functionality?
The "C" denotes bi-directional configuration: the device exhibits identical avalanche characteristics in both forward and reverse bias, with no cathode marking. This enables symmetric protection of AC-coupled or floating differential signals (e.g., RS-485, CAN, LVDS), unlike uni-directional variants that require correct polarity alignment and only protect against one-polarity transients.
SMBJ70CA-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- 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:
- SMB
SMBJ70CA-13-F FAQ
1.How can I place an order for SMBJ70CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70CA-13-F 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 SMBJ70CA-13-F reliable?
The price and inventory of SMBJ70CA-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70CA-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ70CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70CA-13-F?
SMBJ70CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70CA-13-F 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 SMBJ70CA-13-F?
For technical support, including SMBJ70CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70CA-13-F requirements.
6.How does Aetrix verify that SMBJ70CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ70CA-13-F 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 SMBJ70CA-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ70CA-13-F?
All SMBJ70CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70CA-13-F, 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 SMBJ70CA-13-F part is unused and in its original packaging.
Return procedure for SMBJ70CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70CA-13-F Tags
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