My Inquiry
My Account
Diodes Incorporated SMBJ70A-13-F
- Part No.:
- SMBJ70A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70A-13-F.pdf
- Description:
- TVS DIODE 70VWM 113VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:17,420
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ70A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 70V reverse standoff voltage, 77.8V minimum breakdown voltage at 1mA test current, and 113V maximum clamping voltage at 5.3A peak pulse current. It features glass-passivated die construction, SMB package, and is designed for overvoltage protection in DC power rails and signal lines of industrial control systems.
For engineers reviewing the SMBJ70A-13-F datasheet, SMBJ70A-13-F pinout, SMBJ70A-13-F application, or SMBJ70A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse current capability under 8.3ms half-sine surge, thermal derating above +25°C, and RoHS-compliant matte tin lead finish for lead-free reflow compatibility.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: it remains high-impedance below 70V VRWM, then avalanches sharply at ≥77.8V VBR to divert transient energy away from downstream circuitry. Its 600W peak pulse power rating is validated per 8.3ms single half-sine waveform with ≤4 pulses/minute duty cycle.
Thermal performance is defined by 4.8W/°C derating above +25°C ambient and 5.0W steady-state dissipation at TL = +75°C. The device exhibits <5.0μA reverse leakage at VRWM and is rated for operation from –55°C to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains 5.3A @ 113V clamp for 8.3ms surge without failure |
| Reverse Standoff Voltage | 70V - maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage | 77.8–89.5V @ 1mA - precise avalanche onset ensures predictable clamping threshold |
| Clamping Voltage | 113V @ 5.3A IPP - limits voltage seen by protected IC during ESD/EFT events |
| Package | SMB - standardized surface-mount outline (5.0–5.59mm length, 3.3–3.94mm width) for automated assembly |
| Operating Temperature | –55°C to +150°C - supports industrial and automotive under-hood environments |
| RoHS Compliance | Lead-free, halogen-free, antimony-free - meets EU Directive 2011/65/EU and green manufacturing requirements |
Pinout & Package
Package: SMB (Surface Mount Body), molded plastic case per UL 94V-0, 0.1g typical weight, matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band (Marked End) | Anode Reference / Ground Return Path | Identifies cathode terminal; connects to system ground or low-impedance return when protecting positive rail |
| Opposite Terminal | Protected Line Input | Connects to line being safeguarded (e.g., +12V supply); conducts surge current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Enhances reliability and stability of breakdown voltage across temperature and lifetime |
| 600W peak pulse rating | Handles IEC 61000-4-5 Level 4 surges (4kV line-to-line, 2Ω source impedance) |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during fast transients, improving margin for 75V-rated components |
| Uni-directional configuration | Optimized for DC power rail protection where polarity is fixed and reverse conduction must be blocked |
| Moisture sensitivity Level 1 | Eliminates bake requirement prior to reflow; compatible with standard SMT assembly flow |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Protecting 24V sensor input channels against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Shunt TVS placed between input pin and chassis ground to clamp surges before they reach analog front-end or microcontroller GPIO. Use Value: Limits voltage to ≤113V during 5.3A 8.3ms surge, preserving integrity of 30V-rated op-amps and ADC inputs. |
Use Scenario: Safeguarding LIN bus transceiver power pins against battery voltage spikes during jump-start or alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional clamp on VCC rail upstream of transceiver IC to absorb >100V transients within microseconds. Use Value: Maintains <5μA leakage at 24V nominal, avoiding quiescent current impact while enabling 113V clamping compliance with ISO 7637-2 Pulse 5a. |
| Telecom Power Feeds | Medical Diagnostic Equipment |
Use Scenario: Overvoltage protection on -48V DC telecom power distribution boards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional SMBJ70A used on negative rail with cathode tied to system ground. Use Value: Withstands 600W surge energy and maintains stable clamping up to +150°C ambient in enclosed cabinets. |
Use Scenario: Shielding isolated power supplies feeding imaging sensor arrays from ESD events during cable handling or connector mating. IC Role / Device Role / Timing Role: Final-stage TVS on secondary-side 12V/24V outputs to prevent latch-up or gate oxide damage in downstream regulators. Use Value: UL 94V-0 flammability rating and halogen-free construction meet IEC 60601-1 safety and environmental requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70AHE3/52 (Vishay) | Same 70V VRWM, 113V VC @ 5.3A, but AEC-Q200 qualified and offered in tape-and-reel only | Required for automotive production; lacks Diodes Inc.'s commercial-grade moisture sensitivity Level 1 | Select for automotive OEM programs requiring AEC-Q200; otherwise prefer SMBJ70A-13-F for industrial cost and assembly flexibility |
| P6SMB70A (ON Semiconductor) | Identical electrical specs (70V VRWM, 113V VC), but slightly larger SMB package footprint (5.29 × 3.94 mm vs. 5.59 × 3.94 mm) and higher IR (10μA max) | Compatible in most PCB layouts; higher leakage may affect ultra-low-power sensor nodes | Acceptable drop-in for legacy designs using P6SMB series; verify pad layout clearance and leakage budget |
Compared with SMBJ70AHE3/52 and P6SMB70A, the SMBJ70A-13-F offers optimal balance of commercial qualification, Level 1 moisture sensitivity, and tight 5.0μA IR spec-making it preferred for industrial automation and medical equipment where reflow simplicity and low standby leakage are critical.
Availability
SMBJ70A-13-F is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and telecom power feeds requiring stable component supply, consistent parametric performance, and full traceability across production batches.
Supply support for SMBJ70A-13-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SMBJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for robust, high-energy surge protection in harsh industrial and automotive environments where reliability under repetitive stress is essential.
FAQ
What is the maximum clamping voltage of SMBJ70A-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 113V at 5.3A peak pulse current (IPP), measured under the standard 8.3ms half-sine waveform per IEC 61000-4-5. This value defines the upper voltage limit imposed on protected circuitry during a surge event and is guaranteed across the full operating temperature range.
Is SMBJ70A-13-F suitable for bidirectional signal line protection?
No - SMBJ70A-13-F is a unidirectional TVS diode, indicated by the absence of "C" suffix. It conducts only during positive overvoltage relative to its cathode. For bidirectional protection (e.g., RS-485, USB D+/D−), the bi-directional variant SMBJ70CA-13-F must be used instead.
Does SMBJ70A-13-F require pre-baking before reflow soldering?
No - it is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without baking. This eliminates process steps and reduces risk of moisture-induced popcorning during lead-free soldering.
How does the 600W peak pulse rating translate to real-world surge immunity?
The 600W rating corresponds to a 5.3A surge at 113V clamp for 8.3ms, matching IEC 61000-4-5's Combination Wave (1.2/50μs voltage, 8/20μs current). In practice, this enables protection against Level 4 surges (4kV line-to-line) when paired with appropriate series impedance, such as a 2Ω source impedance.
SMBJ70A-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- 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:
- SMB
SMBJ70A-13-F FAQ
1.How can I place an order for SMBJ70A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70A-13-F 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-13-F reliable?
The price and inventory of SMBJ70A-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70A-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ70A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70A-13-F?
SMBJ70A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70A-13-F 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-13-F?
For technical support, including SMBJ70A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70A-13-F requirements.
6.How does Aetrix verify that SMBJ70A-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ70A-13-F 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-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ70A-13-F?
All SMBJ70A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70A-13-F, 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-13-F part is unused and in its original packaging.
Return procedure for SMBJ70A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70A-13-F 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
