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Vishay General Semiconductor - Diodes Division SMBJ70CHE3/5B
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- Part No.:
- SMBJ70CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70CHE3/5B.pdf
- Description:
- TVS DIODE 70VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,207
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Product details
Overview
SMBJ70CHE3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 70 V standoff voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 113 V maximum clamping voltage (VC) at 5.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs, industrial sensor interfaces, and telecom line protection.
For engineers reviewing the SMBJ70CHE3/5B datasheet, SMBJ70CHE3/5B pinout, SMBJ70CHE3/5B application, or SMBJ70CHE3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), polarity marking convention, and real-world clamping behavior under surge conditions - critical for ESD and lightning-induced transient design validation.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt device: when reverse voltage exceeds VWM = 70 V, it avalanches into low-impedance conduction to divert surge energy away from protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
Rated for 150 °C maximum junction temperature and compliant with J-STD-020 MSL Level 1 (260 °C peak reflow), SMBJ70CHE3/5B supports automated SMT assembly and meets AEC-Q101 stress test requirements for automotive electronics - including high-temperature operating life and surge robustness per ISO 7637-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V/24 V/48 V systems. |
| VBR @ IT = 1 mA | 77.8–86.0 V - Breakdown voltage range confirming reliable avalanche initiation without premature conduction. |
| VC @ IPPM = 5.3 A | 113 V - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream ICs (e.g., MCU I/O or LDO input). |
| PPPM | 600 W - Peak pulse power handling capacity; enables protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against load dump events. |
| TJmax | 150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / Protected line connection | Connected to the line being protected (e.g., 70 V DC rail); avalanche conduction initiates here when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power supplies - passes temperature cycling, HTRB, and surge tests. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients such as ISO 7637-2 Pulse 5a (load dump) without degradation or failure. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during clamping - critical for protecting 75 V-rated MOSFETs or wide-VDS drivers. |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard lead-free reflow profiles up to 260 °C peak. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA) across temperature and lifetime - improves long-term reliability in harsh environments. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: Protecting 70 V nominal battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a) and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and primary DC/DC converter input. Use Value: Limits voltage to ≤113 V during 5.3 A surge, preventing damage to 100 V input-rated buck controllers and gate drivers. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) in factory automation sensors exposed to inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS connected from signal line to ground, suppressing fast-rising EFT bursts (IEC 61000-4-4). Use Value: Clamps transients within 1 ns response time while adding <10 pF capacitance - avoids signal integrity degradation at 10 kHz bandwidth. |
| Telecom DC Power Feeds | Renewable Energy Charge Controller Inputs |
|
Use Scenario: Overvoltage suppression on -48 V telecom rectifier outputs subject to lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Primary-level TVS mounted at board edge, upstream of hot-swap controllers and PMICs. Use Value: Absorbs 600 W pulses without latch-up or parametric shift - maintains system uptime during field-deployed surge events. |
Use Scenario: Protecting solar charge controller inputs connected to PV arrays prone to voltage spikes during cloud-edge transitions or open-circuit faults. IC Role / Device Role / Timing Role: Standoff-rated TVS on MPPT input stage, coordinated with fuse and MOV for staged protection. Use Value: Withstands repeated 70–86 V breakdown excursions and 150 °C junction temperature - suitable for desert-installation thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70AHE3/5B | No AEC-Q101 qualification; commercial-grade only; identical VWM, VBR, and VC specs. | Not approved for automotive use; acceptable for industrial or telecom where qualification is not mandated. | Select SMBJ70AHE3/5B only if AEC-Q101 compliance is unnecessary and cost optimization is prioritized. |
| SMAJ70AHE3/5B | Lower PPPM = 400 W; same VWM/VBR; SMA package (smaller footprint, higher RθJA = 140 °C/W). | Limited to lower-energy surges (e.g., IEC 61000-4-2 ESD only); unsuitable for load dump or lightning. | Choose SMAJ70AHE3/5B only for space-constrained PCBs with <400 W surge requirements and no automotive qualification need. |
Compared with SMBJ70AHE3/5B and SMAJ70AHE3/5B, SMBJ70CHE3/5B uniquely combines AEC-Q101 qualification, 600 W surge capability, and SMB package thermal performance - making it the sole option for automotive-grade 70 V rail protection requiring production traceability and extended temperature reliability.
Availability
SMBJ70CHE3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and telecom DC power feed applications requiring stable component supply, full AEC-Q101 documentation, and 13" tape-and-reel delivery for high-volume SMT lines.
Supply support for SMBJ70CHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series is engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where consistent clamping performance and long-term stability are non-negotiable.
FAQ
What is the clamping voltage of SMBJ70CHE3/5B at its rated peak pulse current?
The SMBJ70CHE3/5B has a maximum clamping voltage (VC) of 113 V at 5.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ70CHE3/5B maintains this clamping performance across its qualified temperature range and after repeated surge exposures per AEC-Q101.
Is SMBJ70CHE3/5B qualified for automotive applications?
Yes, SMBJ70CHE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMBJ5.0A–SMBJ188A datasheet (Rev. 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and surge robustness - making SMBJ70CHE3/5B suitable for under-hood and chassis-mounted automotive modules.
What does the "5B" in SMBJ70CHE3/5B indicate?
The "5B" in SMBJ70CHE3/5B denotes the preferred package code for 13-inch diameter plastic tape-and-reel delivery, containing 3200 units per reel. This packaging format is optimized for high-speed pick-and-place SMT assembly and aligns with IPC-7351 standards for SMB (DO-214AA) footprint compatibility. The "HE3" suffix confirms RoHS-compliant, AEC-Q101-qualified construction.
How does SMBJ70CHE3/5B differ from SMBJ70AHE3/5B?
SMBJ70CHE3/5B and SMBJ70AHE3/5B share identical electrical specifications (VWM, VBR, VC, PPPM) but differ in qualification: only SMBJ70CHE3/5B carries AEC-Q101 certification. The "C" in the base part number explicitly indicates automotive qualification per Vishay's ordering nomenclature, while "A" denotes commercial grade. Both use the same SMB package and RoHS-compliant HE3 termination.
What is the maximum junction temperature rating for SMBJ70CHE3/5B?
The SMBJ70CHE3/5B has a maximum junction temperature (TJmax) of +150 °C, enabling reliable operation in high-ambient environments such as engine compartments or enclosed industrial enclosures. This rating is validated per AEC-Q101 test conditions and supported by its RθJA = 100 °C/W thermal resistance on standard 0.2" × 0.2" copper pads - allowing accurate thermal derating in system-level thermal models.
SMBJ70CHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 4.8A
- 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)
SMBJ70CHE3/5B FAQ
1.How can I place an order for SMBJ70CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70CHE3/5B 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 SMBJ70CHE3/5B reliable?
The price and inventory of SMBJ70CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ70CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70CHE3/5B?
SMBJ70CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70CHE3/5B 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 SMBJ70CHE3/5B?
For technical support, including SMBJ70CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70CHE3/5B requirements.
6.How does Aetrix verify that SMBJ70CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ70CHE3/5B 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 SMBJ70CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ70CHE3/5B?
All SMBJ70CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70CHE3/5B, 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 SMBJ70CHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ70CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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