My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ70C-E3/5B
;;2.jpg)
- Part No.:
- SMBJ70C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70C-E3/5B.pdf
- Description:
- TVS DIODE 70VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,332
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ70C-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on signal or power lines. It features a 70 V standoff 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 a 10/1000 µs waveform - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ70C-E3/5B datasheet, SMBJ70C-E3/5B pinout, SMBJ70C-E3/5B application, or SMBJ70C-E3/5B equivalent, key selection criteria include bidirectional clamping capability, UL 497B recognition, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on SMB (DO-214AA) footprint.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche breakdown in both polarities, enabling suppression of positive and negative transients without polarity dependency. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1.0 ps), critical for safeguarding MOSFET gates and IC I/O pins against ESD and inductive switching spikes.
The SMBJ70C-E3/5B is rated for -55 °C to +150 °C operating junction temperature and exhibits a 0.105 %/°C temperature coefficient of VBR, supporting reliable operation across automotive and industrial thermal environments. Its 20 °C/W junction-to-lead thermal resistance enables effective surge energy dissipation when mounted on standard 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 113 V at 5.3 A - Clamped voltage under 10/1000 µs surge; limits stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling capacity; supports repetitive transient suppression at 0.01 % duty cycle. |
| IPPM | 5.3 A - Peak surge current capability with defined 10/1000 µs waveform; validated per ANSI/IEEE C62.35. |
| Junction Temp | -55 °C to +150 °C - Full operational range compatible with under-hood and factory-floor environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm max length and 4.06 mm min width; RoHS-compliant matte tin leads. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are unmarked anode and cathode ends; symmetrical construction eliminates orientation dependency during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Completes low-impedance surge shunt path during either polarity overvoltage event. |
| Cathode | Transient return path (bidirectional) | Functions identically to anode due to symmetrical junction design; no functional distinction in circuit layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| 600 W peak pulse power | Handles high-energy transients from inductive load switching (e.g., relay coils, solenoids) without degradation. |
| UL 497B recognized | Validated for telecom and data-line surge protection per Underwriters Laboratories safety standard QVGQ2. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles; no baking required prior to assembly. |
| Glass-passivated junction | Ensures long-term stability of leakage current (<1.0 µA) and breakdown voltage across temperature and life cycles. |
Applications
| Industrial Sensor Interfaces | Telecom Data Lines |
|---|---|
|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O (RS-485) of PLC modules from field-induced surges. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to divert surge energy before reaching signal conditioning circuitry. Use Value: Limits transient voltage to ≤113 V, preventing latch-up or gate oxide damage in op-amps and RS-485 transceivers. |
Use Scenario: Shielding Ethernet PHY interface and POTS line drivers in VoIP gateways from lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential pairs, maintaining signal integrity while absorbing common-mode transients. Use Value: Maintains <1.0 µA leakage at 70 V, avoiding DC bias shift on sensitive line drivers and preserving insertion loss specs. |
| Automotive Body Control Modules | Consumer Appliance Motor Drivers |
|
Use Scenario: Safeguarding LIN bus nodes and window lift motor control inputs against battery dump and load-dump events. IC Role / Device Role / Timing Role: Primary transient suppressor on power-supply rail and communication lines, qualified to AEC-Q101 via HE3 variant family. Use Value: Withstands 150 °C junction temperature and meets ISO 7637-2 Pulse 5a requirements when used with appropriate PCB copper area. |
Use Scenario: Protecting microcontroller GPIOs and H-bridge gate drivers in washing machine control boards from motor commutation spikes. IC Role / Device Role / Timing Role: Low-profile TVS mounted adjacent to motor driver ICs to clamp inductive kickback before it propagates into logic circuitry. Use Value: 600 W rating absorbs repetitive 10/1000 µs pulses from brushed DC motors without parameter drift over 10,000+ surge events. |
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-E3/5B | Identical electrical specs and package; CA suffix explicitly denotes bidirectional version per Vishay naming convention. | No functional difference - CA is the standardized bidirectional designation; SMBJ70C-E3/5B is a legacy/alternate marking for same device. | Select SMBJ70CA-E3/5B for new designs to align with current Vishay documentation and distributor cataloging. |
| SMCJ70C-E3/57T | Same VWM (70 V) and bidirectional function but in larger SMC (DO-214AB) package with 1500 W PPPM. | Used where higher surge energy handling is required; not drop-in due to 7.11 mm × 6.22 mm footprint vs. SMB's 5.59 mm × 4.06 mm. | Choose only if system-level testing confirms need for >600 W surge capacity; requires PCB layout change. |
Compared with SMBJ70C-E3/5B, SMBJ70CA-E3/5B offers identical protection performance with standardized nomenclature, while SMCJ70C-E3/57T provides higher surge margin at the cost of board space and thermal coupling differences.
Availability
SMBJ70C-E3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom data lines, and automotive body control modules requiring stable component supply and UL-recognized transient protection.
Supply support for SMBJ70C-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 application-specific qualification.
The SMBJ series was engineered for robust, surface-mount transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where failure tolerance and long-term parametric stability are critical.
FAQ
What is the polarity configuration of SMBJ70C-E3/5B?
SMBJ70C-E3/5B is a bidirectional Transient Voltage Suppressor, meaning it provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ70A), it has no cathode band marking and functions identically regardless of voltage polarity applied across its terminals - making it ideal for AC-coupled or floating signal paths where polarity cannot be assumed.
Does SMBJ70C-E3/5B meet automotive qualification standards?
SMBJ70C-E3/5B itself is commercial-grade (E3 suffix), but the SMBJ70C family includes AEC-Q101-qualified versions such as SMBJ70CHE3_B/I. While SMBJ70C-E3/5B shares identical electrical and thermal characteristics, it lacks the formal automotive qualification documentation and test reporting required for under-hood deployment. For automotive use, specify the HE3 or HM3 suffix variant.
What is the maximum clamping voltage of SMBJ70C-E3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ70C-E3/5B is 113 V, measured at its peak pulse current (IPPM) of 5.3 A using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and is guaranteed across the full operating temperature range.
Can SMBJ70C-E3/5B be used in place of SMBJ70A?
No - SMBJ70C-E3/5B and SMBJ70A serve fundamentally different circuit roles. SMBJ70A is unidirectional (cathode-marked, blocks reverse current), while SMBJ70C-E3/5B is bidirectional (no marking, conducts symmetrically). Substituting one for the other risks improper clamping behavior, especially on AC or bipolar signal lines. Always match polarity configuration to system topology.
What PCB pad layout is recommended for optimal thermal performance of SMBJ70C-E3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for SMBJ70C-E3/5B to achieve rated 600 W pulse power and maintain junction temperature within limits. Use internal ground/power planes connected via multiple thermal vias beneath each pad, and avoid narrow traces between the device and bulk capacitance - this layout reduces thermal impedance and prevents localized overheating during repetitive surge events.
SMBJ70C-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ70C-E3/5B FAQ
1.How can I place an order for SMBJ70C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70C-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 SMBJ70C-E3/5B reliable?
The price and inventory of SMBJ70C-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 SMBJ70C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ70C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70C-E3/5B?
SMBJ70C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70C-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 SMBJ70C-E3/5B?
For technical support, including SMBJ70C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70C-E3/5B requirements.
6.How does Aetrix verify that SMBJ70C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ70C-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 SMBJ70C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ70C-E3/5B?
All SMBJ70C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70C-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 SMBJ70C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ70C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70C-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 …
