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Vishay General Semiconductor - Diodes Division SMAJ90CAHM3_A/H
- Part No.:
- SMAJ90CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90CAHM3_A/H.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,341
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Product details
Overview
SMAJ90CAHM3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 90 V stand-off voltage (VWM), 146 V maximum clamping voltage (VC) at 2.1 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ90CAHM3_A/H datasheet, SMAJ90CAHM3_A/H pinout, SMAJ90CAHM3_A/H application, or SMAJ90CAHM3_A/H equivalent, key selection criteria include bidirectional surge clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism, with symmetrical bidirectional behavior due to its CA suffix configuration. Its 100–111 V breakdown voltage range (VBR) at 1 mA test current ensures reliable triggering above normal operating voltage while maintaining low leakage (<1.0 μA at VWM).
The SMAJ90CAHM3_A/H delivers fast response time (<1.0 ps), low incremental surge resistance, and stable clamping under repetitive 0.01% duty cycle pulses. It meets J-STD-020 MSL Level 1 and supports lead-free reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 100 V / 111 V at 1 mA - defines guaranteed avalanche conduction threshold window |
| VC @ IPPM | 146 V at 2.1 A - clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 400 W - peak transient energy absorption capacity under standard waveform |
| ID @ VWM | <1.0 μA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| RθJA | 120 °C/W - thermal resistance dictates derating above 25 °C ambient for sustained power dissipation |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either direction) | Acts as input node for positive or negative surges - bidirectional conduction path |
| Cathode | Transient current exit (either direction) | Completes clamping loop to ground/rail - identical electrical role as Anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surge events (4 kV/2 Ω) when mounted on 5 mm × 5 mm copper pads |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - simplifies SMT line integration |
| Glass passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs against load dump and ESD in vehicle body control modules. IC Role / Device Role / Timing Role: Voltage clamping element placed between bus line and transceiver pin to limit transient excursions. Use Value: Prevents latch-up or permanent damage to transceivers during ISO 7637-2 Pulse 5a (load dump) events up to 120 V. |
Use Scenario: Safeguarding two-wire CAN FD physical layer against coupling noise and EFT bursts in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional shunt clamp across CANH–CANL differential pair. Use Value: Maintains signal integrity by clamping common-mode surges to ≤146 V while preserving <1 pF junction capacitance at 0 V bias. |
| Consumer Power Adapter Output Stage | Telecom DC Power Input Protection |
|
Use Scenario: Secondary-side overvoltage suppression in USB PD and Qi wireless charging adapters. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after DC-DC converter output filter. Use Value: Absorbs flyback spikes from transformer leakage inductance without affecting regulation loop stability. |
Use Scenario: Front-end surge protection for -48 V telecom rectifier outputs feeding base station RF modules. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail prior to POL converters. Use Value: Withstands repeated 10/1000 μs surges up to 400 W while maintaining <1 μA leakage at nominal -48 V operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CAHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial/industrial use only - not approved for automotive ECUs | Select when halogen-free requirement or automotive qualification is not mandated |
| SMBJ90CAHM3_A/H | Same VWM/VC/PPPM but in SMB (DO-214AA) package - 25% larger footprint, lower RθJA (90 °C/W) | Better thermal performance for higher average surge duty cycles; requires PCB layout change | Choose when board space allows and thermal margin is critical under repetitive surge conditions |
Compared with SMAJ90CAHM3_A/H, SMAJ90CAHE3_A/H offers identical clamping performance without halogen-free or automotive qualification, while SMBJ90CAHM3_A/H improves thermal handling at the cost of increased PCB area - both require validation of mechanical fit and layout compatibility.
Availability
SMAJ90CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus hardening, and telecom DC input safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMAJ90CAHM3_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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and optoelectronics, with emphasis on high-reliability, AEC-Q101-qualified components for automotive and industrial markets.
The SMAJ series targets robust, surface-mount transient suppression for harsh environments - engineered specifically for rapid clamping response and long-term parametric stability in safety-critical signal paths.
FAQ
What does the 'CA' suffix indicate in SMAJ90CAHM3_A/H?
The 'CA' suffix denotes a bidirectional configuration, meaning SMAJ90CAHM3_A/H provides symmetrical clamping for both positive and negative transients without polarity dependence. This enables direct placement across differential lines or AC-coupled signals, unlike unidirectional 'A' variants which require correct cathode orientation relative to ground.
Is SMAJ90CAHM3_A/H qualified for automotive applications?
Yes, SMAJ90CAHM3_A/H carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. This certification covers stress tests including temperature cycling, highly accelerated life testing (HALT), and unbiased highly accelerated stress testing (uHAST), validating its suitability for under-hood and ADAS applications.
What is the maximum clamping voltage of SMAJ90CAHM3_A/H under surge conditions?
The maximum clamping voltage (VC) of SMAJ90CAHM3_A/H is 146 V when subjected to its rated peak pulse current of 2.1 A with a 10/1000 μs waveform. This value is measured at the device terminals and represents the upper voltage limit imposed on protected circuitry during transient events.
How does the SMA (DO-214AC) package affect thermal performance of SMAJ90CAHM3_A/H?
The SMA package gives SMAJ90CAHM3_A/H a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads. This necessitates derating above 25 °C ambient - for example, at 85 °C ambient, maximum continuous power drops to ~1.8 W - making pad layout critical for surge duty cycle management.
Can SMAJ90CAHM3_A/H replace SMAJ90A in existing designs?
No - SMAJ90CAHM3_A/H is bidirectional while SMAJ90A is unidirectional, so direct substitution risks incorrect clamping behavior on AC or floating nodes. Additionally, SMAJ90A lacks AEC-Q101 qualification and halogen-free compliance. Layout and system-level validation are required before any replacement.
SMAJ90CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 2.1A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ90CAHM3_A/H FAQ
1.How can I place an order for SMAJ90CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90CAHM3_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 SMAJ90CAHM3_A/H reliable?
The price and inventory of SMAJ90CAHM3_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 SMAJ90CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ90CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90CAHM3_A/H?
SMAJ90CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90CAHM3_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 SMAJ90CAHM3_A/H?
For technical support, including SMAJ90CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90CAHM3_A/H requirements.
6.How does Aetrix verify that SMAJ90CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ90CAHM3_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 SMAJ90CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ90CAHM3_A/H?
All SMAJ90CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90CAHM3_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 SMAJ90CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMAJ90CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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