My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ70-E3/5B
;;2.jpg)
- Part No.:
- SMBJ70-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70-E3/5B.pdf
- Description:
- TVS DIODE 70VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,235
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ70-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount 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 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, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives and automotive body control modules.
For engineers reviewing the SMBJ70-E3/5B datasheet, SMBJ70-E3/5B pinout, SMBJ70-E3/5B application, or SMBJ70-E3/5B equivalent, key selection criteria include clamping performance under 5.3 A surge, thermal resistance (RθJA = 100 °C/W), RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below 70 V and rapidly avalanches above its 77.8 V minimum breakdown threshold to divert transients. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for safeguarding MOSFET gate drivers and microcontroller I/O pins against ESD and inductive switching spikes.
The device is rated for repetitive 600 W pulses (10/1000 µs, 0.01% duty cycle) and withstands 100 A non-repetitive forward surge (8.3 ms half-sine). Junction temperature spans –55 °C to +150 °C, and thermal resistance from junction-to-lead is 20 °C/W - enabling reliable operation in thermally constrained PCB layouts without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected rail voltage. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 113 V at 5.3 A - Clamped voltage seen by downstream circuitry during worst-case 600 W surge; defines protection margin. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 µs waveform; validates immunity to lightning-induced surges per IEC 61000-4-5. |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); supports protection of power supply inputs against load dump events. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 5.0 mm × 5.0 mm pads; informs derating above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes shunt path during avalanche conduction. |
| Cathode | High-side connection point | Connected to protected line (e.g., 70 V rail); carries full surge current into ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 Level 4 surge immunity for industrial equipment interfaces. |
| 113 V clamping voltage at 5.3 A | Limits stress on 100 V-rated MOSFETs and gate drivers during 600 W transients. |
| Glass passivated chip junction | Ensures stable VBR tolerance (±5%) and <1.0 µA leakage at 70 V across temperature and life cycle. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow without preconditioning; eliminates moisture-related popcorning risk. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU and JESD201 Class 2 whisker resistance for long-term reliability. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 70 V auxiliary power rails feeding solenoid drivers and CAN transceivers against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between rail and chassis ground to clamp transients within 1 ns. Use Value: Limits voltage excursion to ≤113 V during 5.3 A surges, preventing latch-up in 100 V logic-level MOSFETs and preserving CAN bus integrity. |
Use Scenario: Input protection for LIN bus transceivers and microcontroller GPIOs exposed to battery line transients in door modules. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V–70 V distributed supply nodes, absorbing ESD (IEC 61000-4-2 ±15 kV) and ISO 7637-2 pulse 1/2a. Use Value: Maintains <1.0 µA leakage at 70 V, avoiding quiescent current penalty in always-on subsystems while clamping to safe levels. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
Use Scenario: Secondary-side overvoltage suppression on isolated 48–72 V DC-DC outputs powering FPGAs and PHYs. IC Role / Device Role / Timing Role: Fast-acting shunt element responding within 1 ns to fast-rising transients from relay switching or hot-plug events. Use Value: Delivers 600 W pulse handling without degradation after 1000+ surges, supporting telecom 20-year field life requirements. |
Use Scenario: Surge protection for mainboard 70 V backlight inverters and PFC controller feedback paths in smart refrigerators. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at connector entry points to intercept external surges before reaching sensitive analog front-ends. Use Value: Enables compact SMB footprint (4.57 mm × 3.94 mm) with no external biasing, reducing BOM count versus active protection solutions. |
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-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No difference in protection function; selected where halogen-free materials are mandated (e.g., EU public infrastructure). | Direct material substitution when halogen-free compliance is required; same layout and thermal profile. |
| SMCJ70A-E3/57T | Higher 1500 W peak pulse power (SMC package), 113 V clamping at 13.3 A, larger footprint (7.11 mm × 6.22 mm). | Used where higher surge energy (e.g., outdoor telecom cabinets) exceeds SMBJ70-E3/5B's 600 W rating. | Choose only if system-level surge testing requires >600 W margin; requires PCB redesign due to SMC package size. |
Compared with SMBJ70A-M3/5B, SMBJ70-E3/5B offers identical protection performance with standard RoHS compliance; compared with SMCJ70A-E3/57T, it trades lower surge capacity for space-constrained designs where 600 W suffices and SMB footprint is mandatory.
Availability
SMBJ70-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, consistent RoHS compliance, and MSL Level 1 reflow capability.
Supply support for SMBJ70-E3/5B 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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series was engineered for high-energy transient suppression in space-constrained, high-reliability applications - targeting industrial automation, automotive electronics, and communications infrastructure where consistent clamping and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ70-E3/5B at its rated peak pulse current?
The SMBJ70-E3/5B has a maximum clamping voltage (VC) of 113 V at its rated peak pulse current of 5.3 A (10/1000 µs waveform). This value is measured under standardized test conditions and defines the highest voltage that will appear across the protected circuit during a full 600 W transient event. Designers use this parameter to verify that downstream components, such as 100 V MOSFETs or 120 V capacitors, remain within their absolute maximum ratings when SMBJ70-E3/5B is activated.
Is SMBJ70-E3/5B suitable for automotive applications requiring AEC-Q101 qualification?
No, SMBJ70-E3/5B is a commercial-grade part with RoHS compliance but not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ70HE3_B variant (suffix HE3), which carries the AEC-Q101 qualification and shares identical electrical characteristics. The SMBJ70-E3/5B should be used only in non-automotive contexts such as industrial controls or consumer power supplies where AEC-Q101 is not mandated.
What does the "E3/5B" suffix indicate in SMBJ70-E3/5B?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "5B" specifies packaging in 13-inch diameter plastic tape and reel containing 3200 units. This format supports high-volume automated SMT assembly and meets J-STD-002 solderability standards. The E3/5B configuration is distinct from E3/52 (7-inch reel, 750 units) and M3/5B (halogen-free variant), ensuring correct procurement alignment with production line requirements for SMBJ70-E3/5B.
How does the thermal resistance of SMBJ70-E3/5B affect its power derating?
SMBJ70-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads. This means its 5.0 W steady-state power dissipation must be linearly derated by 50 mW/°C above 25 °C ambient temperature. At 85 °C ambient, for example, allowable continuous power drops to 2.0 W. Engineers must apply this derating when using SMBJ70-E3/5B in sustained overvoltage scenarios - though its primary function remains transient suppression, not continuous dissipation.
Can SMBJ70-E3/5B be used in bidirectional protection circuits?
No, SMBJ70-E3/5B is a unidirectional TVS diode, identifiable by its cathode band marking and specified parameters (e.g., VBR, IFSM) valid only in reverse-biased operation. For bidirectional protection, Vishay offers the SMBJ70CA-E3/5B variant (CA suffix), which provides symmetrical clamping in both polarities and omits the cathode band. Using SMBJ70-E3/5B in AC or floating signal lines risks forward conduction and failure; the correct device must match the circuit's polarity and transient direction requirements.
SMBJ70-E3/5B 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:
- 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-E3/5B FAQ
1.How can I place an order for SMBJ70-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70-E3/5B 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 SMBJ70-E3/5B reliable?
The price and inventory of SMBJ70-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ70-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70-E3/5B?
SMBJ70-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70-E3/5B 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 SMBJ70-E3/5B?
For technical support, including SMBJ70-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70-E3/5B requirements.
6.How does Aetrix verify that SMBJ70-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ70-E3/5B 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 SMBJ70-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ70-E3/5B?
All SMBJ70-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70-E3/5B, 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 SMBJ70-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ70-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70-E3/5B Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
