My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ70D-M3/H
;;2.jpg)
- Part No.:
- SMBJ70D-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70D-M3/H.pdf
- Description:
- TVS DIODE 70VWM 111VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:10,931
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ70D-M3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the 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), 79.0–84.8 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), clamping voltage of 111 V at 5.4 A IPPM, and ±3.5 % VBR tolerance.
For engineers reviewing the SMBJ70D-M3/H datasheet, SMBJ70D-M3/H pinout, SMBJ70D-M3/H application, or SMBJ70D-M3/H equivalent, this page delivers verified electrical parameters, polarity marking guidance, thermal derating behavior, clamping performance under surge conditions, and direct alternatives for circuit protection design in industrial and telecom systems.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity identification, optimized for fast response (<1 ns) to transient overvoltages while maintaining low leakage (<0.5 μA at 70 V). Its junction-to-ambient thermal resistance is 125 °C/W on minimum pad layout, supporting reliable operation up to 150 °C junction temperature.
The device complies with ANSI/IEEE C62.35 surge standards and meets UL 497B recognition (QVGQ2) for protector classification. It is halogen-free, RoHS-compliant, MSL Level 1 rated, and qualified per JESD201 Class 2 whisker test - confirming suitability for automated SMT assembly and long-term reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin |
| VBR min/max | 79.0–84.8 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC at IPPM | 111 V at 5.4 A - clamping voltage during 600 W 10/1000 μs surge; determines protected IC's voltage stress ceiling |
| PPPM | 600 W - peak pulse power handling capability per standard 10/1000 μs waveform; defines transient energy absorption limit |
| ID at VWM | <0.5 μA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss |
| TJ max | 150 °C - maximum junction temperature rating enables use in high-ambient industrial enclosures |
| RθJA | 125 °C/W - thermal resistance on minimum PCB pad layout; informs required board copper area for thermal management |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads, solderable per J-STD-002 and JESD22-B102; cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lower-potential rail; completes clamping path during positive transients |
| Cathode (banded end) | High-side connection point | Connected to protected line (e.g., data bus, power rail); conducts when line voltage exceeds VBR relative to ground |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise coordination with system overvoltage thresholds without margin stacking |
| 600 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-ground) in properly designed layouts |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, relay bounce) |
| MSL Level 1, 260 °C reflow compatible | Eliminates moisture sensitivity concerns and allows single-pass lead-free reflow assembly |
| Halogen-free, RoHS-compliant, industrial grade | Meets global environmental compliance requirements and supports extended temperature operation |
Applications
| Industrial Motor Control | Telecom Power Interface |
|---|---|
Use Scenario: Protection of gate drivers and microcontrollers against back-EMF spikes from brushed DC or stepper motor coils. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between MOSFET gate and source, or across motor supply rails. Use Value: Limits transient voltage to ≤111 V during 5.4 A surge, preventing gate oxide rupture and logic upset in 3.3 V/5 V control ICs. | Use Scenario: Surge suppression on -48 V DC telecom power feeds entering base station equipment. IC Role / Device Role / Timing Role: Primary-level TVS connected anode-to-ground, cathode-to-line to clamp negative-going surges and positive lightning-induced transients. Use Value: Withstands 600 W pulses while holding clamped voltage below 111 V, preserving downstream DC/DC converters and monitoring circuits. |
| Automotive Body Control Module | Industrial Sensor Signal Line |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and ISO 7637-2 pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at connector entry point, cathode to LIN line, anode to chassis ground. Use Value: Responds in <1 ns to 100 V/100 ms load dump events, limiting voltage seen by transceiver to ≤111 V with no latch-up risk. | Use Scenario: Guarding analog outputs (e.g., 4–20 mA current loop) and digital sensor lines (I²C, SPI) in factory automation PLCs. IC Role / Device Role / Timing Role: Low-leakage (≤0.5 μA) TVS placed across signal and return, cathode to signal, anode to ground. Use Value: Prevents false triggering and ADC offset shifts caused by EFT bursts (IEC 61000-4-4) while adding negligible error to precision current loops. |
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/H | Same VWM (70 V), identical package and ratings, but bidirectional configuration (no polarity marking) | Required where symmetrical surge protection is needed (e.g., AC-coupled data lines, transformer-isolated interfaces) | Select SMBJ70A-M3/H only if bidirectional clamping is explicitly required; SMBJ70D-M3/H is optimal for DC-biased rails with defined ground reference. |
| SMCJ70A-E3/57T | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM and VBR range, bidirectional | Suitable for higher-energy threats (e.g., outdoor telecom cabinets, railway signaling) where board space permits larger footprint | Choose SMCJ70A-E3/57T when surge energy exceeds 600 W capability; note increased RθJA (~60 °C/W) and different mounting pad layout. |
Compared with SMBJ70A-M3/H and SMCJ70A-E3/57T, the SMBJ70D-M3/H provides optimal cost, size, and thermal performance for unidirectional DC rail protection up to 600 W - balancing surge robustness with compact SMB footprint and tight VBR tolerance for precise threshold alignment.
Availability
SMBJ70D-M3/H is available at Aetrix Electronics and suitable for industrial motor control, telecom power interface, and automotive body control module designs requiring stable component supply, consistent surge performance, and full traceability through Vishay's M3-grade manufacturing flow.
Supply support for SMBJ70D-M3/H 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, efficiency, and application-specific optimization.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust, standardized transient suppression in industrial, automotive, and communications infrastructure - prioritizing tight parameter distribution, high surge fidelity, and process-controlled consistency.
FAQ
What is the clamping voltage of SMBJ70D-M3/H and how is it measured?
The SMBJ70D-M3/H has a maximum clamping voltage (VC) of 111 V, measured at its peak pulse current (IPPM) of 5.4 A under a standardized 10/1000 μs double-exponential surge waveform. This value reflects the actual voltage imposed on the protected circuit during worst-case transient events and is guaranteed per Vishay's datasheet test conditions - not derived from simulation or estimation. The SMBJ70D-M3/H maintains this clamping performance across its full operating temperature range.
Does SMBJ70D-M3/H support lead-free reflow soldering?
Yes, SMBJ70D-M3/H is rated for lead-free reflow with a maximum peak temperature of 260 °C and meets MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions without baking prior to assembly. Its matte tin-plated terminals comply with J-STD-002 and JESD22-B102 solderability standards, ensuring reliable wetting and joint formation in both SnPb and Pb-free processes - critical for high-yield SMT production of the SMBJ70D-M3/H.
How does the VBR tolerance of SMBJ70D-M3/H impact circuit protection design?
The SMBJ70D-M3/H features a tight ±3.5 % breakdown voltage tolerance (79.0–84.8 V at 1 mA), which directly reduces uncertainty in clamping onset timing and improves coordination with downstream overvoltage protection ICs or IC input absolute maximum ratings. This narrow spread eliminates the need for excessive design margin, allowing more efficient selection of upstream fusing and enabling tighter system-level surge immunity margins - a key advantage of the SMBJ70D-M3/H over generic ±10 % TVS diodes.
Can SMBJ70D-M3/H be used in bidirectional signal line protection?
No - SMBJ70D-M3/H is a unidirectional TVS diode, identifiable by its cathode band marking, and conducts only during positive transients relative to its anode. For bidirectional protection (e.g., RS-485, USB, AC-coupled lines), the SMBJ70CD-M3/H or SMBJ70A-M3/H variants must be used. Using SMBJ70D-M3/H on bidirectional lines risks failure during negative excursions, as it lacks reverse conduction capability - a fundamental limitation of the SMBJ70D-M3/H device architecture.
What is the thermal resistance and power derating behavior of SMBJ70D-M3/H?
SMBJ70D-M3/H has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on the minimum recommended PCB pad layout. Its steady-state power dissipation drops from 1.0 W at 25 °C ambient to zero at 150 °C, following a linear derating curve per Figure 5 in the Vishay datasheet. This behavior must be accounted for in high-temperature enclosures - for example, at 100 °C ambient, SMBJ70D-M3/H is limited to ~0.4 W continuous dissipation, though its 600 W surge rating remains unaffected.
SMBJ70D-M3/H 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):
- 79V
- Voltage - Clamping (Max) @ Ipp:
- 111V
- Current - Peak Pulse (10/1000µs):
- 5.4A
- 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)
SMBJ70D-M3/H FAQ
1.How can I place an order for SMBJ70D-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70D-M3/H 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 SMBJ70D-M3/H reliable?
The price and inventory of SMBJ70D-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70D-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ70D-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70D-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70D-M3/H?
SMBJ70D-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70D-M3/H 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 SMBJ70D-M3/H?
For technical support, including SMBJ70D-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70D-M3/H requirements.
6.How does Aetrix verify that SMBJ70D-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ70D-M3/H 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 SMBJ70D-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ70D-M3/H?
All SMBJ70D-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70D-M3/H, 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 SMBJ70D-M3/H part is unused and in its original packaging.
Return procedure for SMBJ70D-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70D-M3/H 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 …
