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Vishay General Semiconductor - Diodes Division SMBJ70A-E3/52
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- Part No.:
- SMBJ70A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70A-E3/52.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,869
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Product details
Overview
SMBJ70A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. 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 rating with 10/1000 µs waveform - deployed in motor drive power supplies, industrial I/O modules, and automotive body control units.
For engineers reviewing the SMBJ70A-E3/52 datasheet, SMBJ70A-E3/52 pinout, SMBJ70A-E3/52 application, or SMBJ70A-E3/52 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge conditions, thermal resistance data, and direct alternative part comparisons - all aligned to Vishay's 09-Jan-2024 revision of document 88392.
Technical Context
The SMBJ70A-E3/52 operates as a unidirectional avalanche diode with cathode-band polarity marking, optimized for fast response (<1 ps) to transient overvoltages induced by inductive switching or ESD events. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance across repetitive surges at 0.01% duty cycle.
Thermally, it exhibits RθJA = 100 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W (junction-to-lead), supporting reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is RoHS-compliant (E3 suffix), with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail protection threshold. |
| VBR (min/max) | 77.8 V / 86.0 V at IT = 1 mA - Confirmed breakdown range ensuring predictable turn-on during transients. |
| VC @ IPPM | 113 V at 5.3 A (10/1000 µs) - Clamped voltage seen by protected circuit under rated surge; limits stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capacity; supports robust protection against IEC 61000-4-5 Level 3/4 surges. |
| ID @ VWM | 1.0 µA max - Ultra-low reverse leakage preserves system efficiency and minimizes standby power loss. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive or high-temperature industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Low-profile SMD outline (5.59 mm × 4.06 mm × 2.44 mm) compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking on one end. Dimensions: 5.59 mm × 4.06 mm × 2.44 mm (L × W × H); terminals are matte tin-plated for lead-free reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction path during reverse-biased transient clamp. |
| Cathode | High-side connection point | Connected to protected line (e.g., 70 V rail); band-marked end indicates polarity for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against high-energy transients common in 24 V/48 V industrial power systems. |
| 113 V clamping voltage at 5.3 A | Provides defined overvoltage ceiling for 70 V-rated MOSFETs or gate drivers, preventing destructive avalanche failure. |
| MSL Level 1 moisture sensitivity | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity. |
| 100 A IFSM (8.3 ms half-sine) | Withstands high-current inrush or fault events without bond-wire fusing, enhancing system-level reliability. |
| 0.057 %/°C VBR tempco | Ensures stable breakdown voltage across -55 °C to +150 °C, critical for automotive under-hood applications. |
Applications
| Industrial Motor Drive Power Supply | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protection of 70 V auxiliary power rail feeding microcontrollers and CAN transceivers against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and ground to clamp transients within 1 ns, limiting voltage overshoot to ≤113 V. Use Value: Prevents latch-up or permanent damage to 70 V-tolerant MCUs and LIN/CAN PHYs during ISO 16750-2 load-dump events. |
Use Scenario: Surge suppression on 12 V/24 V lighting control outputs driving solenoids and relays in door modules. IC Role / Device Role / Timing Role: Fast-clamping TVS absorbing 600 W pulses from relay coil de-energization, located adjacent to driver IC output pins. Use Value: Extends lifetime of N-channel MOSFET switches by limiting drain-source voltage spikes to safe levels during switching transitions. |
| Programmable Logic Controller (PLC) Digital Input | Telecom Remote Radio Unit (RRU) DC Feed Line |
Use Scenario: Input protection for 24 V digital input channels exposed to field wiring transients in factory automation environments. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 70 V) used in series with current-limiting resistor to protect optocoupler inputs. Use Value: Maintains >100 kΩ input impedance at 24 V while clamping 1 kV/500 A surges to <113 V, preserving signal integrity and isolation. |
Use Scenario: DC power feed line protection (48 V) from lightning-induced surges entering outdoor base station cabinets via coaxial cable shields. IC Role / Device Role / Timing Role: Primary TVS stage upstream of DC-DC converter, sized for 600 W pulse handling and low capacitance (<100 pF). Use Value: Limits surge energy transferred to sensitive RF front-end components, meeting IEC 61000-4-5 Level 4 immunity requirements. |
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 | Bidirectional variant; symmetrical VBR (77.8–86.0 V) in both polarities; no cathode marking. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus) where reverse polarity transients occur. | Select only when bidirectional clamping is mandatory; not interchangeable with SMBJ70A-E3/52 due to polarity and marking differences. |
| SMCJ70A-E3/57 | Larger SMC (DO-214AB) package; same VWM/VBR/VC specs but higher IPPM (10.6 A) and PPPM (1500 W). | Used where higher surge margin is needed (e.g., outdoor telecom, solar inverters) and PCB space allows larger footprint. | Choose for enhanced ruggedness in harsh environments; requires layout change due to different pad dimensions and thermal mass. |
Compared with SMBJ70CA-E3/52 and SMCJ70A-E3/57, the SMBJ70A-E3/52 offers optimal balance of compact SMB footprint, precise 70 V standoff, and 600 W surge capability - making it ideal for space-constrained 70 V DC rail protection where unidirectional clamping suffices and board area is premium.
Availability
SMBJ70A-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, PLC digital inputs, and telecom remote radio unit power feeds requiring stable component supply, RoHS compliance, and AEC-Q101-qualified alternatives.
Supply support for SMBJ70A-E3/52 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, TVS devices, and MOSFETs with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMBJ series is engineered for high-reliability transient suppression in demanding environments - targeting industrial automation, automotive electronics, and telecommunications infrastructure where precise voltage clamping and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ70A-E3/52 under standard test conditions?
The SMBJ70A-E3/52 has a maximum clamping voltage (VC) of 113 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 5.3 A. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's document 88392, revision 09-Jan-2024. The SMBJ70A-E3/52 maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMBJ70A-E3/52 RoHS-compliant and suitable for lead-free reflow assembly?
Yes, the "E3" suffix in SMBJ70A-E3/52 denotes RoHS-compliance and commercial-grade qualification. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and it is rated for LF peak temperatures up to 260 °C per J-STD-020 MSL Level 1 - making SMBJ70A-E3/52 fully compatible with standard lead-free reflow profiles without pre-baking.
Does SMBJ70A-E3/52 have AEC-Q101 qualification?
No, SMBJ70A-E3/52 is not AEC-Q101 qualified. That qualification applies only to variants with "HE3" or "HM3" suffixes (e.g., SMBJ70AHE3_B). The SMBJ70A-E3/52 is commercial-grade; for automotive applications requiring AEC-Q101, engineers must select the HE3-suffixed version and verify packaging and revision code alignment with Vishay's ordering matrix.
What is the reverse leakage current of SMBJ70A-E3/52 at its rated stand-off voltage?
At its 70 V stand-off voltage (VWM), the SMBJ70A-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at TA = 25 °C. This ultra-low leakage ensures minimal power loss in always-on circuits and avoids false triggering in high-impedance sensing nodes. The SMBJ70A-E3/52 maintains ID < 5 µA even at TJ = 125 °C per thermal derating curves in the datasheet.
How does the thermal resistance of SMBJ70A-E3/52 affect its power dissipation capability?
The SMBJ70A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. At ambient temperatures up to 50 °C, its continuous power dissipation (PD) is rated at 5.0 W - meaning SMBJ70A-E3/52 can safely dissipate steady-state leakage or minor ripple without exceeding TJ = 150 °C. For pulsed operation, thermal inertia allows brief 600 W surges without junction overheating.
SMBJ70A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ70A-E3/52 FAQ
1.How can I place an order for SMBJ70A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70A-E3/52 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 SMBJ70A-E3/52 reliable?
The price and inventory of SMBJ70A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ70A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70A-E3/52?
SMBJ70A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70A-E3/52 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 SMBJ70A-E3/52?
For technical support, including SMBJ70A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70A-E3/52 requirements.
6.How does Aetrix verify that SMBJ70A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ70A-E3/52 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 SMBJ70A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ70A-E3/52?
All SMBJ70A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70A-E3/52, 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 SMBJ70A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ70A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70A-E3/52 Tags
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