My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ12CAHM3/H
- Part No.:
- SMBJ12CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12CAHM3/H.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,350
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ12CAHM3/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 or power lines. It features a 12 V stand-off voltage (VWM), 19.9 V maximum clamping voltage (VC) at 30.2 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs waveform), making it suitable for protecting MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ12CAHM3/H datasheet, SMBJ12CAHM3/H pinout, SMBJ12CAHM3/H application, or SMBJ12CAHM3/H equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and halogen-free RoHS-compliant construction - all critical for ESD/surge protection design-in and automotive-grade BOM validation.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown in both directions (VBR(min) = 13.3 V, VBR(max) = 14.7 V at IT = 1 mA), enabling robust transient suppression on AC-coupled or floating lines. Its low incremental surge resistance and fast response time ensure effective energy diversion before downstream components experience overvoltage stress.
The SMBJ12CAHM3/H uses a glass-passivated silicon junction and is rated for -55 °C to +150 °C operating junction temperature. It meets MSL Level 1 per J-STD-020, with matte tin-plated leads solderable per J-STD-002 and JESD22-B102, and qualifies under AEC-Q101 for automotive applications when ordered with HM3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR(min/max) | 13.3 V / 14.7 V at 1 mA - Confirmed bidirectional breakdown range; ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 19.9 V at 30.2 A - Clamped voltage under 600 W 10/1000 μs surge; limits stress on protected ICs to safe levels. |
| PPPM | 600 W - Peak pulse power handling capability; supports high-energy lightning or inductive-switching surges. |
| IPPM | 30.2 A - Peak surge current capacity under standard 10/1000 μs waveform; determines minimum trace width and PCB layout robustness. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; informs derating requirements above 25 °C ambient. |
| TJ(max) | +150 °C - Maximum junction temperature; sets upper limit for thermal design in enclosed or high-power environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Either end connects to protected line; no directional installation required - simplifies layout and automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) without external series impedance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics where reliability under thermal cycling and vibration is mandatory. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A Tier 1 reporting requirements for green manufacturing and end-of-life processing. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow without moisture sensitivity concerns - eliminates bake-out step in SMT line. |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes overvoltage overshoot during clamping - critical for safeguarding 3.3 V or 5 V logic interfaces. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and feedback signal lines against inductive kickback from relay coils and solenoid switching. IC Role / Device Role: Bidirectional voltage clamp placed across isolated signal paths or low-side switch outputs. Use Value: Limits transient voltage to ≤19.9 V, preventing latch-up or oxide breakdown in 12 V-rated microcontrollers and gate drivers. |
Use Scenario: Surge suppression on LIN bus lines and sensor inputs (e.g., door lock actuators, ambient light sensors) exposed to load dump and jump-start conditions. IC Role / Device Role: Primary TVS element on board-level interfaces requiring AEC-Q101 compliance and <1 μs response. Use Value: Withstands repetitive 10/1000 μs pulses up to 600 W while maintaining VC stability across -40 °C to +125 °C ambient. |
| Telecom Power Supply Inputs | Consumer IoT Sensor Nodes |
Use Scenario: Input-stage protection for 12 V DC-DC converters feeding baseband processors in small-cell radio units. IC Role / Device Role: First-line transient suppressor upstream of input filter capacitors and PMICs. Use Value: 30.2 A IPPM rating handles EN 61000-4-5 combination wave surges without degradation after 1000+ events. |
Use Scenario: ESD and EFT protection on analog sensor inputs (e.g., temperature, humidity) in battery-powered smart home devices. IC Role / Device Role: Low-capacitance (<50 pF typical at 0 V) bidirectional clamp minimizing signal distortion on 10–100 kHz sensor outputs. Use Value: 12 V VWM provides headroom above 3.3 V/5 V supply rails while ensuring fast turn-on before MCU GPIO damage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free; commercial grade only (no AEC-Q101). | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules. | Select when cost-sensitive industrial designs do not require halogen-free or automotive qualification. |
| SMCJ12CAHM3 | Same VWM, VC, and bidirectional function; higher PPPM = 1500 W in larger SMC (DO-214AB) package. | Requires larger PCB footprint and higher IPPM (69.4 A); better for high-energy surge zones like AC input stages. | Choose when system-level surge testing exceeds 600 W or when layout allows SMC footprint. |
Compared with SMBJ12CAHM3/H, the E3/52 variant trades halogen-free content and AEC-Q101 for lower unit cost in non-automotive settings, while the SMCJ12CAHM3 offers 2.5× higher surge capacity at the expense of board space - making SMBJ12CAHM3/H the optimal balance of compactness, automotive readiness, and 600 W protection for space-constrained 12 V signal lines.
Availability
SMBJ12CAHM3/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and consumer IoT sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ12CAHM3/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 is engineered for robust transient suppression in space-constrained, high-reliability applications - particularly where bidirectional clamping, AEC-Q101 compliance, and halogen-free construction are mandatory.
FAQ
What is the clamping voltage of SMBJ12CAHM3/H at its rated peak pulse current?
The SMBJ12CAHM3/H has a maximum clamping voltage (VC) of 19.9 V at its rated peak pulse current (IPPM) of 30.2 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024 (Document Number: 88392). The SMBJ12CAHM3/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), ensuring consistent protection for downstream circuitry.
Is SMBJ12CAHM3/H qualified for automotive applications?
Yes, SMBJ12CAHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix in its part number - denoting halogen-free, RoHS-compliant, and automotive-grade construction. Vishay explicitly lists HM3-suffix variants in the ordering table with footnote (1): "AEC-Q101 qualified". This qualification covers stress tests including temperature cycling, mechanical shock, and high-temperature operating life, making SMBJ12CAHM3/H suitable for use in body electronics, infotainment, and ADAS sensor interfaces.
How does SMBJ12CAHM3/H differ from unidirectional SMBJ12AHM3/H?
SMBJ12CAHM3/H is bidirectional, with symmetrical breakdown and clamping in both polarities (VBR = 13.3–14.7 V in either direction), whereas SMBJ12AHM3/H is unidirectional and conducts only in reverse bias. The "CA" suffix denotes bidirectional functionality, eliminating polarity marking and enabling use on AC-coupled or floating lines. Both share identical package (SMB), power rating (600 W), and thermal specs, but SMBJ12CAHM3/H must be selected when protection is needed regardless of voltage polarity - such as on differential data lines or transformer-isolated supplies.
What is the maximum reverse leakage current for SMBJ12CAHM3/H at its stand-off voltage?
The maximum reverse leakage current (ID) for SMBJ12CAHM3/H is 5.0 μA at its stand-off voltage (VWM) of 12 V and ambient temperature of 25 °C. This value is specified in the Electrical Characteristics table of the Vishay datasheet (Document Number: 88392) and reflects minimal power loss and negligible loading on protected circuits during normal operation - critical for battery-powered or low-quiescent-current applications where standby current must remain ultra-low.
Does SMBJ12CAHM3/H require special PCB layout considerations?
SMBJ12CAHM3/H should be mounted using the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal, as specified in the Vishay datasheet for thermal and surge performance. Short, wide traces to the protected node minimize inductance and preserve clamping speed. Because it is bidirectional and unmarked, orientation is irrelevant - reducing placement errors in automated assembly. No heatsink is required for 600 W pulses at low duty cycle, but RθJA = 100 °C/W mandates derating above 25 °C ambient per Figure 2 in the datasheet.
SMBJ12CAHM3/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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 30.2A
- 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)
SMBJ12CAHM3/H FAQ
1.How can I place an order for SMBJ12CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12CAHM3/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 SMBJ12CAHM3/H reliable?
The price and inventory of SMBJ12CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ12CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ12CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12CAHM3/H?
SMBJ12CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12CAHM3/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 SMBJ12CAHM3/H?
For technical support, including SMBJ12CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12CAHM3/H requirements.
6.How does Aetrix verify that SMBJ12CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ12CAHM3/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 SMBJ12CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ12CAHM3/H?
All SMBJ12CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12CAHM3/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 SMBJ12CAHM3/H part is unused and in its original packaging.
Return procedure for SMBJ12CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ12CAHM3/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 …
