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Vishay General Semiconductor - Diodes Division SMBJ70CAHE3_A/H
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- Part No.:
- SMBJ70CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70CAHE3_A/H.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,838
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Product details
Overview
SMBJ70CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 70 V standoff voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), 5.3 A peak pulse current (IPPM), and clamps to ≤113 V at rated surge. It protects MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the SMBJ70CAHE3_A/H datasheet, SMBJ70CAHE3_A/H pinout, SMBJ70CAHE3_A/H application, or SMBJ70CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and compliance with UL 497B for surge protectors.
Technical Context
This device operates as a voltage-clamping protector using an avalanche junction structure, responding in <1 ps to transient overvoltages. Its bidirectional symmetry enables protection of AC-coupled or floating signal paths without polarity constraints, and its glass-passivated chip junction ensures stable leakage (<1 µA at VWM) and repeatable breakdown behavior under repetitive surges.
The SMBJ70CAHE3_A/H is rated for 600 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle, with derating above 25 °C per Fig. 2. Its low incremental surge resistance and fast response support robust immunity against EFT, lightning-induced surges, and inductive switching transients in 24 V and 48 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48 V DC systems. |
| VBR (min/max) | 77.8 V / 86.0 V at IT = 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above system nominal voltage. |
| VC @ IPPM | ≤113 V - Clamped voltage during 5.3 A surge; limits stress on downstream 100 V-rated MOSFETs or logic inputs. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; meets IEC 61000-4-5 Level 3 surge immunity requirements. |
| IPPM | 5.3 A - Peak surge current capacity; supports protection of 24–48 V bus lines with typical source impedance ≤20 Ω. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in sealed enclosures or high-ambient industrial environments. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs PCB thermal pad design for sustained surge duty. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Acts as cathode during positive half-cycle; connects to protected line or ground return path depending on layout. |
| Cathode | Transient current entry (bidirectional) | Acts as anode during negative half-cycle; symmetric terminal enabling AC or floating node protection without orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 combination wave surges up to 1 kV/500 A on 50 Ω source impedance. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics applications requiring reliability under temperature cycling and humidity exposure. |
| UL 497B recognized (QVGQ2) | Meets Underwriters Laboratories requirements for telecom and data line protectors, supporting safety certification of end equipment. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD or inductive kick), improving protection margin for sensitive CMOS inputs. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow soldering at peak temperature up to 260 °C without preconditioning or baking. |
Applications
| Industrial PLC I/O Modules | Telecom Line Interface Cards |
|---|---|
Use Scenario: Protecting 24 V DC digital input channels from relay contact bounce, motor drive coupling, and field wiring surges. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between input terminal and ground, shunting transients before they reach optocoupler or MCU GPIO. Use Value: Limits transient voltage to ≤113 V, preserving 100 V-rated input protection circuitry and extending mean time between failures in factory automation environments. | Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs on DSLAM or ONU line cards exposed to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential signal pairs (e.g., A/B lines), referenced to local ground plane. Use Value: Maintains signal integrity by clamping common-mode surges without polarity biasing, meeting GR-1089-CORE Level 3 immunity requirements. |
| Automotive Body Control Modules | 48 V Mild Hybrid Power Distribution |
Use Scenario: Shielding LIN bus nodes and LED driver ICs from load dump and jump-start transients in vehicle interior electronics. IC Role / Device Role / Timing Role: Secondary-level TVS on sub-5 V supply rails and communication lines, downstream of primary TVS or fuse. Use Value: AEC-Q101 qualification ensures survivability through 1000+ thermal cycles and 85 °C/85% RH bias life testing per automotive reliability standards. | Use Scenario: Protecting gate drivers and current-sense amplifiers in 48 V battery management and DC-DC converter control circuits. IC Role / Device Role / Timing Role: Clamp device on high-side switch gate-source path and analog sensing inputs to prevent latch-up or oxide damage. Use Value: Withstands repeated 600 W surges at 0.01% duty cycle, supporting robust operation in stop-start and regenerative braking conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA-E3/52 | Same electrical specs, RoHS-compliant commercial grade (non-AEC-Q101), E3 suffix instead of HE3. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and UL recognition suffices. |
| SMCJ70CAHE3_A/H | Same VWM/VBR/VC, but SMC (DO-214AB) package with higher PPPM = 1500 W and lower RθJA = 35 °C/W. | Better thermal performance and surge margin; requires larger PCB footprint (7.11 mm × 6.22 mm vs. SMB's 4.57 mm × 3.94 mm). | Choose when higher surge endurance or improved thermal dissipation is required and board space permits. |
Compared with SMBJ70CA-E3/52, the SMBJ70CAHE3_A/H adds AEC-Q101 qualification and UL 497B recognition for automotive and telecom safety compliance; compared with SMCJ70CAHE3_A/H, it trades surge capacity and thermal performance for compact SMB footprint in space-constrained layouts.
Availability
SMBJ70CAHE3_A/H is available at Aetrix Electronics and suitable for industrial PLC I/O modules, telecom line interface cards, automotive body control units, and 48 V mild hybrid power distribution systems requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ70CAHE3_A/H 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments, targeting industrial automation, automotive electronics, and communications infrastructure where robustness against ESD, EFT, and lightning surges is critical.
FAQ
What does the "CA" suffix indicate in SMBJ70CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ70CAHE3_A/H provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ70A), it has no cathode band marking and functions identically regardless of polarity-ideal for AC-coupled lines, differential buses, or floating grounds where transient direction is unpredictable.
Is SMBJ70CAHE3_A/H suitable for automotive applications?
Yes, SMBJ70CAHE3_A/H is AEC-Q101 qualified (indicated by the "HE3" suffix), making it suitable for automotive body electronics, infotainment interfaces, and power distribution modules. It has passed stress tests including temperature cycling, humidity bias, and mechanical shock per AEC-Q101 Rev H, and is UL 497B recognized for use in automotive telecom and data line protection.
What is the maximum clamping voltage of SMBJ70CAHE3_A/H at its rated surge current?
The maximum clamping voltage (VC) of SMBJ70CAHE3_A/H is 113 V at its rated peak pulse current (IPPM) of 5.3 A, measured with a 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet (Document Number 88392, Rev 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
How does the SMB (DO-214AA) package of SMBJ70CAHE3_A/H compare thermally to larger packages like SMC?
The SMB (DO-214AA) package of SMBJ70CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads, versus ~35 °C/W for the SMC (DO-214AB) package. This means SMBJ70CAHE3_A/H requires more careful PCB thermal design-such as enlarged copper pours or thermal vias-to sustain repetitive surges without exceeding TJ = 150 °C.
Does SMBJ70CAHE3_A/H meet any safety certifications?
Yes, SMBJ70CAHE3_A/H is Underwriters Laboratories (UL) recognized under file E136766 for both unidirectional and bidirectional devices, complying with UL 497B for protectors used in telecommunications and data line applications. It also meets MSL Level 1 per J-STD-020 and carries RoHS compliance per the HE3 suffix definition in the Vishay ordering guide.
SMBJ70CAHE3_A/H 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ70CAHE3_A/H FAQ
1.How can I place an order for SMBJ70CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70CAHE3_A/H 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 SMBJ70CAHE3_A/H reliable?
The price and inventory of SMBJ70CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ70CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70CAHE3_A/H?
SMBJ70CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70CAHE3_A/H 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 SMBJ70CAHE3_A/H?
For technical support, including SMBJ70CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ70CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ70CAHE3_A/H 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 SMBJ70CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ70CAHE3_A/H?
All SMBJ70CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70CAHE3_A/H, 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 SMBJ70CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ70CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70CAHE3_A/H Tags
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