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Vishay General Semiconductor - Diodes Division SMBJ70-E3/52
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- Part No.:
- SMBJ70-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70-E3/52.pdf
- Description:
- TVS DIODE 70VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,306
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Product details
Overview
SMBJ70-E3/52 from Vishay General Semiconductor is a unidirectional 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 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 (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ70-E3/52 datasheet, SMBJ70-E3/52 pinout, SMBJ70-E3/52 application, or SMBJ70-E3/52 equivalent, key selection criteria include clamping voltage margin relative to protected device's absolute maximum rating, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking (cathode band), and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering.
Technical Context
This TVS diode operates as a voltage-clamping protection device that remains high-impedance below VWM (70 V) and rapidly avalanches above VBR to limit transient overvoltage. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
It delivers 600 W peak pulse power handling under standardized 10/1000 µs surge conditions, with fast response time (<1.0 ns) and low incremental surge resistance - enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes on DC rails and low-speed signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal circuit operation. |
| VBR min/max | 77.8 V / 86.0 V at IT = 1 mA - guaranteed avalanche onset range; defines minimum overvoltage threshold for protection activation. |
| VC @ IPPM | 113 V at 5.3 A - clamped voltage during 10/1000 µs surge; must stay below protected device's absolute max rating. |
| PPPM | 600 W - peak transient energy absorption capability; determines survivability against standardized surge waveforms. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; guides PCB copper area requirements for thermal management. |
| Package | SMB (DO-214AA) - surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow. |
| Polarity | Unidirectional - cathode marked by band; blocks forward conduction, clamps only reverse transients. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads, solderable per J-STD-002; polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lower-potential rail; completes clamping path during reverse transient. |
| Cathode | High-side connection point | Connected to protected line (e.g., 70 V supply rail); band-marked terminal; conducts avalanche current when line exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without degradation under repetitive duty cycle (0.01 %). |
| 113 V clamping voltage at 5.3 A | Provides ≥15 V margin below typical 130 V absolute max rating of 100 V-rated MOSFETs and DC-DC controllers. |
| Low profile SMB package | 0.220" × 0.155" footprint with 0.096" height - fits space-constrained industrial and telecom PCB layouts. |
| RoHS-compliant E3 suffix | Meets EU RoHS Directive 2011/65/EU; matte tin plating ensures compatibility with lead-free reflow profiles up to 260 °C peak. |
| 150 °C max junction temperature | Supports operation in sealed enclosures or high-ambient environments (e.g., motor drives, solar inverters) without derating below 70 V VWM. |
Applications
| Industrial Motor Drive Power Supply | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protection of 70 V auxiliary power rail feeding gate drivers and microcontrollers against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between rail and ground to shunt surge energy away from downstream ICs. Use Value: Limits transient voltage to ≤113 V during 12 V system load dump events, preserving reliability of 100 V-rated MOSFETs and LDO regulators. | Use Scenario: Input protection for LIN bus transceivers and sensor signal conditioning circuits exposed to battery transients. IC Role / Device Role / Timing Role: Standoff protector on 12 V supply input to BCM subassembly; activated only during >77.8 V overvoltage events. Use Value: Prevents latch-up or oxide damage in 5 V/3.3 V logic ICs by clamping surges before they propagate through local regulation stages. |
| Telecom Remote Radio Unit (RRU) | Consumer Smart Home Hub Power Input |
Use Scenario: DC input protection for outdoor RRU units powered via 48 V PoE++ or centralized DC feed, subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end TVS on main 48–72 V input stage; coordinated with upstream fuses and secondary filtering. Use Value: Absorbs 600 W surge energy while maintaining <113 V clamping level, ensuring no overvoltage reaches isolated DC-DC converters or FPGAs. | Use Scenario: Protection of USB-C PD input stage (up to 20 V) and internal 70 V intermediate bus in multi-rail smart home gateway. IC Role / Device Role / Timing Role: Secondary-stage TVS on 70 V buck-derived rail powering RF SoCs and memory subsystems. Use Value: Provides fail-safe clamping margin for ±10 % input tolerance and transient overshoot during hot-plug events, avoiding brownout or reset faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70A-E3/52 | Same electrical specs and package; identical marking code "NP" per Vishay datasheet table; E3/52 denotes same RoHS-compliant tape-and-reel packaging. | No functional difference; alternate part number format used interchangeably in Vishay documentation and distributor listings. | Select based on inventory availability; both share identical qualification, thermal performance, and surge ratings. |
| SMCJ70A | Higher 1500 W PPPM rating, larger SMC (DO-214AB) package, higher RθJA (60 °C/W), same VWM/VBR/VC values. | Better suited for higher-energy surges but requires larger PCB area and different pad layout; not drop-in compatible due to footprint mismatch. | Choose SMCJ70A only if surge threat level exceeds 600 W; otherwise SMBJ70-E3/52 offers optimal size-power balance. |
Compared with SMBJ70A-E3/52 (identical function) and SMCJ70A (higher-power alternative), SMBJ70-E3/52 delivers verified 600 W surge immunity in the smallest standard surface-mount TVS footprint - making it ideal for space-constrained designs where 70 V rail protection is required without over-engineering.
Availability
SMBJ70-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom remote radio units, and consumer smart home hubs requiring stable component supply and consistent surge protection performance.
Supply support for SMBJ70-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q101 qualification.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, automotive electronics, and infrastructure equipment where repeatable clamping performance and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ70-E3/52 under a 10/1000 µs surge?
The SMBJ70-E3/52 has a maximum clamping voltage (VC) of 113 V at 5.3 A peak pulse current (IPPM) under the standardized 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 surge events - critical for ensuring compatibility with 100 V-rated downstream components.
Is SMBJ70-E3/52 RoHS-compliant and lead-free solder compatible?
Yes, SMBJ70-E3/52 carries the E3 suffix, indicating full RoHS compliance per EU Directive 2011/65/EU. Its matte tin-plated leads meet J-STD-002 solderability requirements and support lead-free reflow profiles with a maximum peak temperature of 260 °C, as confirmed in the Mechanical Data section of Vishay document 88392.
Does SMBJ70-E3/52 have AEC-Q101 qualification?
No, SMBJ70-E3/52 is a commercial-grade part. For AEC-Q101 qualified versions, select the HE3 or HM3 suffix variants (e.g., SMBJ70AHE3_B), which are explicitly noted in the Ordering Information table of Vishay document 88392 as meeting automotive stress testing requirements.
What is the thermal resistance of SMBJ70-E3/52, and how does it affect PCB layout?
SMBJ70-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value mandates adequate copper pour area around both terminals to maintain junction temperature below 150 °C during repeated surge events - undersized pads will cause premature thermal failure.
How is polarity identified on SMBJ70-E3/52, and why does it matter for circuit design?
SMBJ70-E3/52 is unidirectional and marked with a cathode band on one end - the banded terminal connects to the protected line (e.g., 70 V rail), while the unmarked end connects to ground. Correct orientation is essential: reverse installation prevents clamping action and may cause catastrophic short-circuit during overvoltage events.
SMBJ70-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ70-E3/52 FAQ
1.How can I place an order for SMBJ70-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70-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 SMBJ70-E3/52 reliable?
The price and inventory of SMBJ70-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 SMBJ70-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ70-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70-E3/52?
SMBJ70-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70-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 SMBJ70-E3/52?
For technical support, including SMBJ70-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70-E3/52 requirements.
6.How does Aetrix verify that SMBJ70-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ70-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 SMBJ70-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ70-E3/52?
All SMBJ70-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70-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 SMBJ70-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ70-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70-E3/52 Tags
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