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Vishay General Semiconductor - Diodes Division SMBJ70CAHE3/5B
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- Part No.:
- SMBJ70CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70CAHE3/5B.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,441
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Product details
Overview
SMBJ70CAHE3/5B 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), and clamps to ≤113 V at 5.3 A peak surge current - used for protecting MOSFETs, sensor interfaces, and industrial I/O circuits.
For engineers reviewing the SMBJ70CAHE3/5B datasheet, SMBJ70CAHE3/5B pinout, SMBJ70CAHE3/5B application, or SMBJ70CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on PCBs with 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at 70 V), while the 20 °C/W junction-to-lead thermal resistance supports reliable power dissipation under repetitive surge conditions.
The device complies with ANSI/IEEE C62.35 surge waveform standards and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its 100 °C/W junction-to-ambient thermal resistance reflects standard SMB package limitations without heatsinking - requiring layout-aware thermal design for sustained 5.0 W steady-state operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 70 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 77.8–86.0 V at 1 mA - guaranteed conduction onset range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | ≤113 V at IPPM = 5.3 A (10/1000 μs) - peak voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 600 W - maximum transient energy absorption capability under standardized 10/1000 μs waveform |
| ID (Max Reverse Leakage) | ≤1.0 μA at 70 V - negligible standby current draw; avoids loading sensitive reference or bias networks |
| TJ max | 150 °C - maximum allowable junction temperature; sets upper limit for thermal design and derating curves |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm max length, 4.06 mm max width, and 2.20 mm max height |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, with cathode/anode roles undefined due to symmetrical construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | AC-coupled transient path | Either side accepts positive or negative surges; no fixed anode/cathode designation |
| Terminal 2 | AC-coupled transient path | Completes bidirectional clamping loop; identical electrical behavior to Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body modules, and ADAS sensor interfaces |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted |
| Low profile SMB package | 0.220" × 0.130" footprint fits high-density layouts; compatible with standard 7" and 13" tape-and-reel SMT feeders |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from BLDC motor switching. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across MOSFET gate-source or op-amp input pins. Use Value: Limits transient excursions to ≤113 V, preventing gate oxide rupture and analog front-end saturation during 5.3 A surge events. |
Use Scenario: Shielding CAN/LIN bus transceivers and MEMS pressure sensors from load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on differential signal pairs and supply rails in automotive ECUs. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 5a (75 V/350 ms) by clamping within 1 ns response time and surviving 1000+ surge cycles. |
| Telecom Power Feeds | Consumer USB-C PD Ports |
|
Use Scenario: Safeguarding PoE-powered Ethernet switches and remote PHY devices from lightning-induced surges on 48 V DC feeds. IC Role / Device Role / Timing Role: Secondary-level TVS downstream of primary GDT/MOV protection on DC input rails. Use Value: Absorbs residual 600 W transients after upstream suppression, enabling compact 70 V-rated DC-DC converter input stages. |
Use Scenario: Protecting USB-C CC logic and VBUS monitoring circuitry from ESD and hot-swap overshoot during plug insertion. IC Role / Device Role / Timing Role: Fast-response clamp on CC1/CC2 and VBUS lines adjacent to USB controller ICs. Use Value: Achieves <1 ns response with <1.0 μA leakage at 70 V, preserving low-power sleep states while meeting IEC 61000-4-2 Level 4 (15 kV air). |
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-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free material compliance is mandated | Direct substitution if halogen-free bill-of-materials requirement applies |
| SMCJ70CAHE3/5B | Larger SMC (DO-214AB) package; same VWM/VBR/VC but higher 1500 W PPPM rating | Used where higher surge energy handling is needed, e.g., main DC input vs. secondary signal lines | Choose only when board space allows larger footprint and 1500 W capability is required |
Compared with SMBJ70CAHE3/5B, the M3/5B offers identical protection performance with halogen-free construction, while the SMCJ70CAHE3/5B trades compact SMB size for 2.5× higher pulse power - making it suitable for primary-side rather than secondary-side protection.
Availability
SMBJ70CAHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and consumer USB-C PD ports requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMBJ70CAHE3/5B 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 and automotive-grade validation.
The SMBJ series delivers standardized transient suppression in compact surface-mount packages, engineered specifically for cost-sensitive yet robust protection of power rails and signal paths in automotive, industrial, and communications equipment.
FAQ
What does the "CA" suffix indicate in SMBJ70CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ70CAHE3/5B provides symmetrical clamping for both positive and negative transients without polarity sensitivity. This differs from unidirectional "A" variants like SMBJ70AHE3/5B, which require correct cathode orientation and only suppress one polarity.
Is SMBJ70CAHE3/5B qualified for automotive applications?
Yes, SMBJ70CAHE3/5B carries the HE3 suffix indicating RoHS compliance and AEC-Q101 qualification. It has been stress-tested for temperature cycling, humidity, mechanical shock, and surge endurance per automotive reliability standards - making it suitable for engine control units, body electronics, and ADAS sensor modules.
What is the maximum clamping voltage of SMBJ70CAHE3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ70CAHE3/5B is 113 V when subjected to its rated peak pulse current of 5.3 A using the standard 10/1000 μs waveform. This value is measured at the device terminals and represents the highest voltage imposed on the protected circuit during such a transient event.
How does SMBJ70CAHE3/5B differ from SMBJ70AHE3/5B?
SMBJ70CAHE3/5B is bidirectional with symmetrical VBR and VC characteristics in both directions, while SMBJ70AHE3/5B is unidirectional - featuring a defined cathode band and conducting only in reverse bias. The "CA" version eliminates polarity-dependent layout constraints and supports AC-coupled or floating node protection.
What PCB pad layout is recommended for optimal thermal performance of SMBJ70CAHE3/5B?
Vishay specifies mounting SMBJ70CAHE3/5B on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W pulse power and 5.0 W steady-state dissipation. Smaller pads reduce thermal conduction and require derating per Figure 2 in the datasheet - especially above 25 °C ambient.
SMBJ70CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMBJ70CAHE3/5B FAQ
1.How can I place an order for SMBJ70CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70CAHE3/5B 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 SMBJ70CAHE3/5B reliable?
The price and inventory of SMBJ70CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ70CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70CAHE3/5B?
SMBJ70CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70CAHE3/5B 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 SMBJ70CAHE3/5B?
For technical support, including SMBJ70CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ70CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ70CAHE3/5B 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 SMBJ70CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ70CAHE3/5B?
All SMBJ70CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70CAHE3/5B, 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 SMBJ70CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ70CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70CAHE3/5B Tags
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