My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ170AHM3_A/H
- Part No.:
- SMBJ170AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170AHM3_A/H.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,905
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ170AHM3_A/H 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 170 V standoff voltage (VWM), 189–209 V breakdown range (VBR at 1 mA), 275 V clamping voltage (VC) at 2.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives to safeguard MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SMBJ170AHM3_A/H datasheet, SMBJ170AHM3_A/H pinout, SMBJ170AHM3_A/H application, or SMBJ170AHM3_A/H equivalent, key selection criteria include its halogen-free RoHS-compliant construction (HM3 suffix), AEC-Q101 qualification readiness, low thermal resistance (RθJL = 20 °C/W), and unidirectional polarity marking via cathode band - critical for ESD-sensitive sensor interfaces and automotive-grade power supply inputs.
Technical Context
This TVS diode operates as a clamping-type protector: under normal bias it presents high impedance (>1 µA leakage at 170 V), then rapidly avalanches below 209 V to limit transient energy. Its glass-passivated junction ensures stable breakdown characteristics and fast response (<1 ns), while the SMB package supports automated placement and meets MSL Level 1 reflow (260 °C peak).
The device is rated for repetitive surge duty cycle ≤0.01 %, derated above 25 °C per Fig. 2, with maximum junction temperature of +150 °C and thermal resistance junction-to-ambient of 100 °C/W on standard 0.2" × 0.2" copper pads. It complies with ANSI/IEEE C62.35 and UL 497B (QVGQ2 recognition).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before significant leakage; defines upper limit of protected circuit's steady-state DC rail. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Breakdown onset range; ensures reliable conduction onset without premature triggering during normal operation. |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs during transient events. |
| PPPM | 600 W - Peak pulse power handling capability; enables suppression of high-energy transients common in industrial solenoid or relay switching. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports robustness against accidental reverse-bias faults or miswiring. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in high-ambient environments such as enclosed motor control enclosures. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables effective heat dissipation through PCB copper traces without external heatsinking. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., VDD rail); conducts surge current to ground when voltage exceeds VBR. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients from inductive load switching in industrial PLC I/O modules. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for export to EU, Japan, and China without compromising surge performance. |
| AEC-Q101 qualification ready (HM3_X variant) | Supports automotive-grade deployment in body electronics and infotainment power supplies with validated reliability testing. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for 3.3 V/5 V logic interfaces. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile compatibility (peak 260 °C), reducing manufacturing risk. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate driver ICs and bootstrap capacitors against voltage spikes induced by IGBT/MOSFET turn-off in BLDC motor inverters. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between high-side gate drive output and ground reference. Use Value: Limits transient voltage to ≤275 V, preventing gate oxide rupture in 600 V-rated Si MOSFETs during 100 A+ switching events. |
Use Scenario: Input rail protection for LIN bus transceivers and LED driver ICs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V battery-supplied VCC input, clamping surges up to ISO 7637-2 Pulse 5a. Use Value: Withstands 170 V continuous operation and clamps 300 V transients within 1 ns, preserving communication integrity during vehicle cranking. |
| Telecom Power Feeds | Industrial Sensor Signal Conditioning |
|
Use Scenario: Overvoltage hardening of -48 V DC telecom rectifier outputs feeding remote radio units. IC Role / Device Role / Timing Role: Primary TVS on negative rail, configured cathode-to-rail to clamp positive transients to ground. Use Value: 275 V clamping ensures downstream DC/DC converters remain within absolute maximum ratings during lightning-induced surges. |
Use Scenario: Protection of analog front-end inputs (e.g., 4–20 mA loop receivers) in factory automation sensors. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA at 170 V) TVS placed across differential input pins to shunt ESD and EFT bursts. Use Value: Maintains signal integrity with <0.1 % gain error impact due to minimal capacitance and leakage at operating voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHE3_A/H | RoHS-compliant but not halogen-free; same electrical specs and SMB package. | Lacks halogen-free certification required for certain green procurement mandates. | Select when halogen-free content is not mandated and cost optimization is prioritized. |
| SMCJ170A-HM3_A/H | Same VWM/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating. | Higher power handling suits higher-energy surge environments (e.g., outdoor telecom cabinets). | Choose when system-level surge test requirements exceed 600 W (e.g., IEC 61000-4-5 Level 4). |
Compared with SMBJ170AHM3_A/H, the HE3 variant trades halogen-free compliance for lower unit cost, while the SMCJ170A-HM3_A/H offers 2.5× higher surge power in a larger footprint - enabling design flexibility across cost, environmental, and ruggedness tiers without changing circuit topology.
Availability
SMBJ170AHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ170AHM3_A/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 targets high-reliability transient suppression in space-constrained, high-volume applications - engineered for automated assembly, thermal stability, and consistent clamping performance across automotive, industrial, and telecom environments.
FAQ
What is the clamping voltage of SMBJ170AHM3_A/H at its rated peak pulse current?
The SMBJ170AHM3_A/H has a maximum clamping voltage (VC) of 275 V at 2.2 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured with the device mounted on 0.2" × 0.2" copper pads per JEDEC standards. The SMBJ170AHM3_A/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ170AHM3_A/H qualified for automotive applications?
The SMBJ170AHM3_A/H itself is not AEC-Q101 qualified, but Vishay offers the functionally identical SMBJ170AHM3_B/H variant (with revision code "B" or later) that carries full AEC-Q101 qualification. The HM3 suffix confirms halogen-free, RoHS-compliant construction - a prerequisite for automotive use - and the underlying die and package meet all mechanical, thermal, and electrical requirements outlined in the AEC-Q101 stress test plan. SMBJ170AHM3_A/H serves as the commercial-grade baseline for that qualified variant.
How does the HM3 suffix differ from E3 or HE3 in SMBJ170A variants?
The HM3 suffix in SMBJ170AHM3_A/H denotes halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance, whereas E3 indicates RoHS-compliant but non-halogen-free material, and HE3 adds AEC-Q101 qualification to the E3 base. All three share identical electrical specifications, SMB package dimensions, and thermal performance. The HM3 variant satisfies stricter environmental mandates (e.g., IEC 61249-2-21) and is preferred for green procurement programs where brominated flame retardants are prohibited.
What is the maximum reverse leakage current of SMBJ170AHM3_A/H at its standoff voltage?
At its 170 V standoff voltage (VWM) and 25 °C ambient temperature, the SMBJ170AHM3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage ensures minimal power loss in always-on circuits and prevents false triggering in high-impedance sensing nodes. Leakage remains below 5 µA up to 125 °C, supporting reliable operation in thermally demanding enclosures without degrading protection margins.
Can SMBJ170AHM3_A/H be used in bidirectional protection configurations?
No - SMBJ170AHM3_A/H is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires the CA-suffixed variant (e.g., SMBJ170CA). Using SMBJ170AHM3_A/H in reverse-biased configurations risks permanent damage, as it lacks symmetrical avalanche structure. For AC-coupled or floating signal lines requiring bidirectional clamping, the SMBJ170CA-HM3_A/H must be selected instead, with identical package, power rating, and environmental compliance.
SMBJ170AHM3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 2.2A
- 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)
SMBJ170AHM3_A/H FAQ
1.How can I place an order for SMBJ170AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170AHM3_A/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 SMBJ170AHM3_A/H reliable?
The price and inventory of SMBJ170AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ170AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170AHM3_A/H?
SMBJ170AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170AHM3_A/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 SMBJ170AHM3_A/H?
For technical support, including SMBJ170AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ170AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ170AHM3_A/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 SMBJ170AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ170AHM3_A/H?
All SMBJ170AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AHM3_A/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 SMBJ170AHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ170AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170AHM3_A/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 …
