My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ70AHM3_B/I
- Part No.:
- SMBJ70AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70AHM3_B/I.pdf
- Description:
- 600W,70V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,324
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ70AHM3_B/I 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 (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, automotive body control modules, and PoE-powered Ethernet interfaces.
For engineers reviewing the SMBJ70AHM3_B/I datasheet, SMBJ70AHM3_B/I pinout, SMBJ70AHM3_B/I application, or SMBJ70AHM3_B/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, clamping performance under surge conditions, and direct replacement guidance for board-level ESD and lightning surge protection design.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: it remains high-impedance below 70 V (VWM), breaks down sharply between 77.8 V and 86.0 V (VBR), and clamps transients to ≤113 V at 5.3 A (IPPM) with low incremental surge resistance. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ps).
Rated for 150 °C maximum junction temperature and compliant with J-STD-020 MSL Level 1 (260 °C peak reflow), SMBJ70AHM3_B/I supports automated SMT assembly. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - critical for automotive under-hood and infotainment power rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 70 V - maximum continuous reverse operating voltage before conduction begins; sets protection threshold for nominal 72 V DC systems. |
| VBR (Breakdown Voltage) | 77.8–86.0 V at 1 mA - guaranteed conduction onset range; ensures reliable triggering above system overvoltage margin. |
| VC (Clamping Voltage) | 113 V at IPPM = 5.3 A - peak voltage seen by protected circuit during 10/1000 µs surge; defines safe stress limit for downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity for standardized 10/1000 µs waveform; enables protection against IEC 61000-4-5 Level 3 surges. |
| ID (Reverse Leakage) | ≤1.0 µA at 70 V - negligible standby current; avoids power loss or false triggering in low-power sensor nodes. |
| TJ max. | 150 °C - maximum junction temperature; supports operation in engine bay or industrial enclosures without derating. |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; completes clamping loop when transient exceeds VBR. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 72 V supply rail); band-marked end indicates polarity for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 surges up to 1 kV/42 Ω on 72 V DC bus without external series impedance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including BCM, lighting control, and ADAS power domains with full temperature cycling and HTRB reliability testing. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-20 MSL Level 1 - supports green manufacturing and high-reliability reflow profiles. |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes voltage overshoot during surge events; preserves margin for 120 V-rated MOSFETs and gate drivers in 72 V systems. |
| 100 A IFSM (8.3 ms half-sine) | Withstands repetitive load dump events in 12/24/72 V vehicle electrical systems without degradation. |
Applications
| Automotive Body Control Module (BCM) | Industrial 72 V DC Motor Drive |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O from load dump and alternator ripple in 12 V/72 V dual-rail BCMs. IC Role / Device Role / Timing Role: Shunt clamping device placed directly across power input pins of LIN PHY ICs and MCU VDD regulators. Use Value: Limits transient voltage to ≤113 V during ISO 7637-2 Pulse 5a (load dump), preventing latch-up or permanent damage to 120 V-rated interface ICs. |
Use Scenario: Safeguarding gate drivers and current-sense amplifiers in 72 V BLDC motor inverters exposed to inductive switching spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS on high-side and low-side DC link rails to clamp commutation-induced dv/dt transients. Use Value: Clamps 600 W surges within 1 ns, maintaining gate drive integrity and avoiding false triggering of overvoltage protection in motor control ICs. |
| Power-over-Ethernet (PoE) PSE Controller | Telecom Remote Radio Unit (RRU) DC Input |
|
Use Scenario: Secondary overvoltage protection on 57 V PoE++ (IEEE 802.3bt) power sourcing equipment output stages. IC Role / Device Role / Timing Role: Final-stage clamping element after primary DC-DC converter, guarding PoE controller ICs and isolation transformers. Use Value: Provides <1.0 µA leakage at 70 V, eliminating standby current impact on PoE classification accuracy while delivering 113 V clamping under surge. |
Use Scenario: Input rail protection for outdoor RRU power supplies subjected to lightning-induced surges on -48 V telecom DC feeds. IC Role / Device Role / Timing Role: First-line transient suppressor mounted at DC input connector, upstream of bulk capacitors and DC-DC converters. Use Value: Withstands repeated 10/1000 µs surges up to 600 W without parameter shift - validated per IEC 61000-4-5 Ed. 3 Annex A test requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70AHE3_B/I | Same electrical specs, but RoHS-compliant (E3) without halogen-free certification; not AEC-Q101 qualified. | Limited to commercial-grade industrial and consumer applications; unsuitable for automotive production. | Select when AEC-Q101 and halogen-free compliance are not required, and cost optimization is prioritized. |
| SMLJ70AHE3_A/H | Same VWM/VBR/VC ratings, but in larger SMC (DO-214AB) package; higher thermal mass (RθJA = 50 °C/W vs. 100 °C/W). | Better suited for high-duty-cycle surge environments where SMBJ70AHM3_B/I may exceed TJ limits under repetitive stress. | Choose for applications requiring >1000 surges/hour or ambient temperatures >105 °C, accepting larger PCB footprint. |
Compared with SMBJ70AHE3_B/I, SMBJ70AHM3_B/I adds halogen-free and AEC-Q101 qualification without sacrificing clamping performance; versus SMLJ70AHE3_A/H, it trades thermal robustness for space-constrained layouts where surge duty cycle is low and ambient stays below 85 °C.
Availability
SMBJ70AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial motor control, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and certified compliance documentation.
Supply support for SMBJ70AHM3_B/I 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, precision, and automotive-grade validation.
The SMBJ series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure immunity and long-term parametric stability are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ70AHM3_B/I under a 10/1000 µs surge?
The SMBJ70AHM3_B/I has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current (IPPM) of 5.3 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuits experience no more than 113 V during such transient events - critical for ensuring compatibility with 120 V-rated components downstream. The SMBJ70AHM3_B/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ70AHM3_B/I qualified for automotive use?
Yes, SMBJ70AHM3_B/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its part number and documented in Vishay's official ordering information table. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (uHAST), making SMBJ70AHM3_B/I suitable for under-hood and chassis-mounted automotive applications such as body control modules, lighting drivers, and ADAS power supplies.
What does the "HM3" suffix indicate in SMBJ70AHM3_B/I?
The "HM3" suffix in SMBJ70AHM3_B/I denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. Specifically, "H" identifies the AEC-Q101 grade, "M" specifies halogen-free molding compound, and "3" confirms RoHS compliance per EU Directive 2011/65/EU. This distinguishes SMBJ70AHM3_B/I from commercial-grade variants like SMBJ70A-E3 and ensures suitability for automotive production and green manufacturing requirements.
Can SMBJ70AHM3_B/I be used in bidirectional protection circuits?
No, SMBJ70AHM3_B/I is strictly unidirectional - indicated by the "A" (not "CA") in its base part number and confirmed by its cathode-band polarity marking. For bidirectional protection, Vishay offers the SMBJ70CA variant, which provides symmetrical clamping in both directions. Using SMBJ70AHM3_B/I in a bidirectional configuration would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What is the thermal resistance of SMBJ70AHM3_B/I, and how does it affect layout?
SMBJ70AHM3_B/I 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 relatively high RθJA means PCB layout must maximize copper area and minimize trace length to avoid exceeding the 150 °C maximum junction temperature during repetitive surge events. Designers should follow Vishay's recommended pad layout in the datasheet and avoid thermal isolation - especially in automotive or industrial applications where ambient temperatures exceed 85 °C.
SMBJ70AHM3_B/I 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):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ70AHM3_B/I FAQ
1.How can I place an order for SMBJ70AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70AHM3_B/I 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 SMBJ70AHM3_B/I reliable?
The price and inventory of SMBJ70AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ70AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70AHM3_B/I?
SMBJ70AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70AHM3_B/I 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 SMBJ70AHM3_B/I?
For technical support, including SMBJ70AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70AHM3_B/I requirements.
6.How does Aetrix verify that SMBJ70AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ70AHM3_B/I 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 SMBJ70AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ70AHM3_B/I?
All SMBJ70AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70AHM3_B/I, 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 SMBJ70AHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ70AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70AHM3_B/I 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 …
