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Vishay General Semiconductor - Diodes Division SMBJ70AHE3/52
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- Part No.:
- SMBJ70AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70AHE3/52.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,946
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Product details
Overview
SMBJ70AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 70 V stand-off 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 (IPPM), and 600 W peak pulse power capability with 10/1000 µs waveform.
For engineers reviewing the SMBJ70AHE3/52 datasheet, SMBJ70AHE3/52 pinout, SMBJ70AHE3/52 application, or SMBJ70AHE3/52 equivalent, key selection criteria include clamping performance under 5.3 A surge, unidirectional polarity for DC rail protection, AEC-Q101 qualification status, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert surge current away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 70 V).
Thermal design relies on RθJA = 100 °C/W and RθJL = 20 °C/W, requiring PCB copper pad area per datasheet recommendation (0.2" × 0.2") to sustain 600 W pulses. The device is rated for TJ = –55 °C to +150 °C and meets MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR min/max | 77.8 V / 86.0 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 113 V at 5.3 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on protected circuitry. |
| PPPM | 600 W - Peak pulse power handling with standard 10/1000 µs waveform; validates robustness against IEC 61000-4-5 surges. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at rated stand-off; critical for low-power sensor or battery-backed circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with J-STD-002 soldering. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band on body; terminals solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during transient clamping. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 70 V supply rail); avalanche conduction initiates here when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 5.3 A without degradation-meets IEC 61000-4-5 Level 4 immunity requirements. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over time and temperature; improves long-term field reliability. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced failure; eliminates bake requirement pre-assembly. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt conditions-critical for protecting fast-switching MOSFET gates and logic inputs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 70 V battery-fed control modules (e.g., body ECUs, lighting drivers) from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between 70 V supply and ground, triggered within <1 ns of overvoltage event. Use Value: Limits transient voltage to ≤113 V, preventing damage to 80 V-rated power management ICs and gate drivers. |
Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in factory automation systems exposed to relay coil kickback. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) clamping element on signal lines referenced to 70 V isolated supply rails. Use Value: Maintains signal integrity with sub-µA bias current error while suppressing 600 W surges without latch-up. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Guarding 48–72 V telecom rectifier outputs against lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS mounted at board edge, coordinated with upstream GDT or MOV for staged clamping. Use Value: Achieves 113 V clamping at 5.3 A, enabling use of 100 V-rated DC-DC converters downstream without derating. |
Use Scenario: Shielding microcontroller I/O and gate driver circuits in washing machine motor inverters from brush-commutator noise and back-EMF spikes. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) unidirectional suppressor on 70 V DC bus feeding half-bridge MOSFETs. Use Value: Prevents false triggering and gate oxide damage by limiting transient overshoot to safe levels during rapid motor deceleration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70AHM3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy. | Direct material substitution when halogen-free sourcing is required; same footprint and thermal behavior. |
| SMCJ70AHE3/52 | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package with higher RθJA (60 °C/W) and 1500 W PPPM rating. | Used where higher surge energy absorption (>600 W) or improved thermal dissipation is needed on dense PCBs. | Choose when system-level surge testing exceeds 600 W or when board layout allows larger footprint for enhanced margin. |
Compared with SMBJ70AHE3/52, SMBJ70AHM3/52 offers identical protection performance with halogen-free construction, while SMCJ70AHE3/52 provides higher pulse power headroom and lower thermal resistance at the cost of increased board area.
Availability
SMBJ70AHE3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom DC power input protection requiring stable component supply, AEC-Q101 qualification, and consistent 70 V clamping performance.
Supply support for SMBJ70AHE3/52 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, precision, and automotive-grade validation.
The SMBJ series is engineered for robust transient suppression in harsh environments-designed specifically for automotive, industrial, and telecom applications demanding AEC-Q101 qualification and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of SMBJ70AHE3/52 under a 10/1000 µs surge?
The SMBJ70AHE3/52 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 per Figure 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMBJ70AHE3/52 maintains this clamping performance across its specified operating temperature range.
Is SMBJ70AHE3/52 qualified for automotive applications?
Yes, SMBJ70AHE3/52 is AEC-Q101 qualified, as confirmed in the "MECHANICAL DATA" section of Vishay document 88392. The HE3 suffix denotes RoHS-compliant and AEC-Q101 qualified construction. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SMBJ70AHE3/52 suitable for under-hood and chassis-mounted automotive modules.
What is the reverse leakage current of SMBJ70AHE3/52 at its rated stand-off voltage?
The SMBJ70AHE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 70 V stand-off voltage (VWM), tested at TA = 25 °C. This low leakage is critical for battery-powered or high-impedance sensor interfaces where standby current must be minimized. The specification is verified in the "ELECTRICAL CHARACTERISTICS" table for SMBJ70A on page 2 of document 88392.
Does SMBJ70AHE3/52 have a bidirectional variant?
No, SMBJ70AHE3/52 is unidirectional only. Bidirectional variants use the "CA" suffix (e.g., SMBJ70CA), which are explicitly listed separately in the datasheet. The "A" suffix in SMBJ70AHE3/52 confirms unidirectional polarity, with cathode marked by a band on the SMB package body-essential for correct orientation in DC rail protection layouts.
What is the thermal resistance from junction to ambient for SMBJ70AHE3/52?
The SMBJ70AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the "THERMAL CHARACTERISTICS" table on page 3 of Vishay document 88392. This value assumes no additional heatsinking and guides PCB layout for sustained power dissipation up to 5.0 W.
SMBJ70AHE3/52 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ70AHE3/52 FAQ
1.How can I place an order for SMBJ70AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70AHE3/52 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 SMBJ70AHE3/52 reliable?
The price and inventory of SMBJ70AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ70AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70AHE3/52?
SMBJ70AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70AHE3/52 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 SMBJ70AHE3/52?
For technical support, including SMBJ70AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70AHE3/52 requirements.
6.How does Aetrix verify that SMBJ70AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ70AHE3/52 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 SMBJ70AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ70AHE3/52?
All SMBJ70AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70AHE3/52, 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 SMBJ70AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ70AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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