My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ8.5CAHM3/H
- Part No.:
- SMBJ8.5CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.5CAHM3/H.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,836
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ8.5CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA test current, 14.4 V maximum clamping voltage (VC) at 41.7 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor signal lines in industrial motor drives and telecom interfaces.
For engineers reviewing the SMBJ8.5CAHM3/H datasheet, SMBJ8.5CAHM3/H pinout, SMBJ8.5CAHM3/H application, or SMBJ8.5CAHM3/H equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, AEC-Q101-qualified halogen-free construction, thermal resistance data, and real-world protection use cases - all confirmed from Vishay's official SMBJ5.0A–SMBJ188A datasheet (Rev. 09-Jan-2024, Doc. #88392).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (9.44–10.4 V), VC (14.4 V), and IPPM (41.7 A) in either direction. Its low incremental surge resistance and fast response time enable effective suppression of ESD, lightning-induced surges, and inductive switching transients without polarity sensitivity.
Rated for TJ = –55 °C to +150 °C, it delivers 5.0 W steady-state power dissipation at TA = 50 °C and exhibits 100 °C/W junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction per JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below circuit operating voltage. |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - Confirmed bidirectional breakdown range; ensures predictable turn-on under transient stress. |
| VC @ IPPM | 14.4 V at 41.7 A (10/1000 µs) - Clamped voltage seen by protected device during worst-case surge; limits downstream overvoltage exposure. |
| PPPM | 600 W - Peak transient energy handling capacity; supports repetitive surge events at 0.01% duty cycle. |
| ID @ VWM | 20 µA max - Low leakage at stand-off voltage preserves signal integrity and minimizes standby power loss. |
| TJ max. | +150 °C - Enables reliable operation in high-temperature environments such as automotive engine bays or industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance defines temperature rise per watt; guides PCB copper pad sizing for thermal management. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads, MSL Level 1 (260 °C peak reflow), 0.106 g unit weight. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band omitted (bidirectional type).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | Accepts surge current during positive half-cycle; connects to line being protected. |
| Cathode | Transient current entry (negative polarity) | Accepts surge current during negative half-cycle; symmetrical with Anode for bidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates polarity concerns during layout and enables single-device protection of AC or differential lines. |
| 600 W peak pulse power | Handles 10/1000 µs transients up to 41.7 A - meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for under-hood and ADAS sensor interfaces. |
| Halogen-free & RoHS | HM3 suffix confirms compliance with JEDEC J-STD-609A Class 1 and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance. |
| Low clamping ratio (VC/VBR) | 14.4 V / 9.44 V ≈ 1.53 - tight ratio ensures minimal overvoltage overshoot during clamping, critical for protecting 3.3 V or 5 V logic devices. |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of gate driver signal lines against inductive kickback from IGBT/MOSFET switching in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional TVS clamps transient spikes on PWM control lines to prevent false triggering or latch-up in isolated gate drivers. Use Value: Prevents field failures caused by >1 kV transients induced by 100 A+ motor current commutation, extending system uptime and reducing warranty claims. |
Use Scenario: ESD and load-dump protection on LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control modules. IC Role / Device Role / Timing Role: Fast-response TVS shunts 8 kV contact ESD (IEC 61000-4-2) and 35 V/100 ms load dump (ISO 7637-2 Pulse 5a) away from precision ADC front-ends. Use Value: Maintains ±0.5% measurement accuracy under harsh automotive conditions while meeting AEC-Q100 Grade 0 ambient temperature requirements. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
|
Use Scenario: Surge protection on 48 V DC power input of PoE-powered network switches and base station radios. IC Role / Device Role / Timing Role: Clamps lightning-induced surges (IEC 61000-4-5, 2 Ω source) on primary-side DC feed before they reach DC/DC converters and Ethernet PHYs. Use Value: Limits clamped voltage to ≤14.4 V, ensuring downstream 24 V-rated controllers remain within absolute maximum ratings during 6 kV surge events. |
Use Scenario: Bidirectional overvoltage protection on USB-C CC and SBU lines exposed to hot-plug transients and cable ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS suppresses ±15 kV air discharge ESD without distorting high-speed USB 2.0 signaling on auxiliary channels. Use Value: Achieves <1 ns response time and <0.5 pF junction capacitance (per Vishay typical curves), preserving signal integrity while passing USB-IF compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CAHE3/H | Same VWM, VBR, VC, and IPPM; RoHS-compliant but not halogen-free (E3 vs HM3). | Lacks AEC-Q101 qualification and JESD201 Class 2 whisker rating; limited to commercial-grade industrial use. | Select when halogen-free content is not required and cost optimization is prioritized over automotive qualification. |
| SMAJ8.5CAHM3 | Same electrical specs but in smaller SMA (DO-214AC) package; RθJA = 140 °C/W (vs 100 °C/W for SMBJ). | Lower power handling under sustained surge due to higher thermal resistance; unsuitable for high-duty-cycle applications. | Choose only for space-constrained layouts where 600 W peak power is sufficient and thermal derating is acceptable. |
Compared with SMBJ8.5CAHM3/H, the HE3/H variant trades halogen-free and AEC-Q101 compliance for lower cost, while the SMAJ8.5CAHM3 sacrifices thermal performance and surge endurance for footprint reduction - making SMBJ8.5CAHM3/H the optimal choice for thermally demanding, automotive-qualified, or high-reliability industrial deployments.
Availability
SMBJ8.5CAHM3/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and consumer USB-C port protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMBJ8.5CAHM3/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series was engineered for robust transient suppression in high-reliability systems - delivering consistent 600 W surge capability, AEC-Q101 qualification, and halogen-free compliance across automotive, industrial, and telecom markets.
FAQ
What does the "CA" suffix mean in SMBJ8.5CAHM3/H?
The "CA" suffix in SMBJ8.5CAHM3/H designates a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., SMBJ8.5AHM3/H), the CA version provides symmetrical clamping behavior in both polarities - essential for protecting AC-coupled signals, differential buses, or circuits where voltage polarity reversal may occur. This eliminates the need for polarity-aware placement during assembly.
Is SMBJ8.5CAHM3/H qualified for automotive applications?
Yes, SMBJ8.5CAHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering information table (page 3, Doc. #88392). The "HM3" suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, validated for temperature cycling, mechanical shock, and high-temperature operating life - making it suitable for engine control units, body electronics, and ADAS sensor modules.
What is the maximum clamping voltage of SMBJ8.5CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of SMBJ8.5CAHM3/H is 14.4 V, measured at its rated peak pulse current (IPPM) of 41.7 A using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage the protected circuit will experience during worst-case transient events.
How does SMBJ8.5CAHM3/H differ from SMBJ8.5AHE3/H?
SMBJ8.5CAHM3/H and SMBJ8.5AHE3/H share identical electrical parameters (VWM, VBR, VC, IPPM), but differ in material compliance and qualification. The HM3 version is halogen-free and AEC-Q101 qualified; the HE3 version is RoHS-compliant but contains halogens and lacks automotive qualification. Both use the same SMB package and mounting footprint.
Can SMBJ8.5CAHM3/H be used in place of a unidirectional TVS like SMBJ8.5AHM3/H?
No - SMBJ8.5CAHM3/H is bidirectional and has no polarity marking, while SMBJ8.5AHM3/H is unidirectional with a cathode band. Substituting them requires circuit-level validation: bidirectional use introduces reverse leakage in DC-biased lines, and unidirectional use fails to protect against negative transients. Always match device polarity to system architecture and transient threat model.
SMBJ8.5CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- 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)
SMBJ8.5CAHM3/H FAQ
1.How can I place an order for SMBJ8.5CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.5CAHM3/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 SMBJ8.5CAHM3/H reliable?
The price and inventory of SMBJ8.5CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.5CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ8.5CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.5CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.5CAHM3/H?
SMBJ8.5CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.5CAHM3/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 SMBJ8.5CAHM3/H?
For technical support, including SMBJ8.5CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.5CAHM3/H requirements.
6.How does Aetrix verify that SMBJ8.5CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ8.5CAHM3/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 SMBJ8.5CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ8.5CAHM3/H?
All SMBJ8.5CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.5CAHM3/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 SMBJ8.5CAHM3/H part is unused and in its original packaging.
Return procedure for SMBJ8.5CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.5CAHM3/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 …
