My Inquiry
My Account
Taiwan Semiconductor Corporation S12MCH
- Part No.:
- S12MCH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
S12MCH.pdf
- Description:
- DIODE GEN PURP 1KV 12A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,438
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
S12MCH from Taiwan Semiconductor is a 12A, 1000V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring AEC-Q101 qualification, glass passivated junction, and 300A peak surge current capability; used in automotive DC-DC converters and snubber circuits requiring high-reliability unidirectional conduction.
For engineers reviewing the S12MCH datasheet, S12MCH pinout, S12MCH application, or S12MCH equivalent, key selection criteria include its 1000V repetitive peak reverse voltage, 1.1V max forward voltage at 12A, 9°C/W junction-to-lead thermal resistance, and compliance with JESD201 Class 2 whisker testing and RoHS/halogen-free requirements.
Technical Context
The S12MCH is a single-die, standard recovery rectifier optimized for high-voltage, medium-current switching applications. Its glass passivated chip junction ensures stable reverse leakage (<1µA at 25°C, <250µA at 125°C) and robust surge tolerance (300A, 8.3ms half-sine).
Thermally, it delivers 9°C/W junction-to-lead resistance and 44°C/W junction-to-ambient resistance in DO-214AB (SMC) package, enabling reliable operation up to +150°C junction temperature under sustained 12A forward current with appropriate PCB copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Maximum repetitive reverse voltage the device blocks without breakdown; defines upper limit for DC bus or snubber voltage rating. |
| IF | 12 A - Continuous average forward current rating at TA = 25°C; requires thermal design to sustain at elevated ambient temperatures. |
| IFSM | 300 A - Peak non-repetitive surge current (8.3ms half-sine); supports inrush and transient overload handling in power supplies. |
| VF (max) | 1.1 V @ 12A, 25°C - Forward voltage drop directly impacts conduction loss and thermal load in high-current paths. |
| RθJL | 9 °C/W - Junction-to-lead thermal resistance; enables accurate thermal modeling when mounted on copper pads per recommended layout. |
| IR (max) | 250 µA @ 125°C - Reverse leakage current at max operating junction temperature; critical for low-power standby and high-impedance sensing nodes. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by band; matte tin-plated leads, UL 94V-0 molding compound, 0.270g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry terminal | Connected to lower-potential side of circuit; must accommodate 12A continuous and 300A surge current routing. |
| Cathode (Lead 2, banded) | Forward current exit / reverse blocking terminal | Connected to higher-potential node; polarity marking essential for correct placement in high-voltage DC paths. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for under-hood and lighting modules. |
| Glass passivated junction | Enhances moisture resistance and long-term stability of reverse characteristics in humid or thermally cycled environments. |
| Low VF (1.1V max) | Reduces conduction losses by ~13% vs. comparable 1000V rectifiers rated at 1.25V, improving efficiency in 12A DC-DC stages. |
| J-STD-020 Level 1 MSL | Zero floor life limitation; allows unlimited storage and standard reflow without baking prior to assembly. |
| RoHS & halogen-free | Complies with IEC 61249-2-21; meets automotive OEM material declarations and end-of-life recycling requirements. |
Applications
| Automotive DC-DC Converters | LED Headlamp Snubbers |
|---|---|
Use Scenario: High-efficiency 12V–48V bidirectional DC-DC conversion in 48V mild-hybrid systems. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant topology, handling 12A continuous output current. Use Value: 1000V VRRM margin accommodates voltage spikes during load dump; 300A IFSM withstands cold-crank transients. | Use Scenario: Voltage clamping and energy dissipation in constant-current LED driver flyback snubbers. IC Role / Device Role / Timing Role: Passive clamp diode absorbing transformer leakage energy during MOSFET turn-off. Use Value: Low VF minimizes clamp power loss; glass passivation ensures stable IR over 15-year automotive lifetime. |
| Industrial Power Supplies | On-Board Charger Input Rectification |
Use Scenario: Primary-side input rectification in universal-input (90–264VAC) industrial SMPS units. IC Role / Device Role / Timing Role: Bridge or single-phase rectifier feeding bulk capacitor; operates at 50/60Hz line frequency with high crest factor. Use Value: 150°C TJ max and 44°C/W RθJA support derated operation in enclosed enclosures without forced air. | Use Scenario: AC input rectification stage in EV on-board chargers accepting 240VAC grid input. IC Role / Device Role / Timing Role: High-voltage input rectifier converting AC to DC bus before PFC stage; exposed to line surges and harmonics. Use Value: 1000V VRRM provides >2× safety margin over 240VAC RMS (340V peak), reducing failure risk during lightning-induced transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-12EWH10 | Same 12A/1000V rating, but TO-220AC package; higher RθJA (50°C/W) and no AEC-Q101 qualification. | Requires heatsink for 12A operation; not approved for automotive use. | Prefer S12MCH where surface-mount, automotive qualification, or space-constrained layouts are required. |
| ON Semiconductor MUR1210CT | 12A/1000V, dual common-cathode configuration in TO-220AB; faster recovery (~75ns) but higher VF (1.3V) and no AEC-Q101. | Enables dual-output designs; unsuitable for single-diode placements or automotive temperature cycling. | Select S12MCH when single-diode, AEC-Q101, or DO-214AB footprint is mandatory. |
Compared with VS-12EWH10 and MUR1210CT, the S12MCH uniquely combines AEC-Q101 qualification, surface-mount DO-214AB packaging, and 1.1V VF in a 1000V/12A rectifier-enabling automotive-grade reliability without heatsink dependency or layout redesign.
Availability
S12MCH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp snubbers, and industrial power supply designs requiring stable component supply, long-lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for S12MCH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power devices, rectifiers, TVS diodes, and MOSFETs.
The S12MCH belongs to TSC's AEC-Q101-qualified surface-mount rectifier family, engineered specifically for automotive and industrial power conversion where high-voltage blocking, surge robustness, and long-term thermal stability are critical.
FAQ
What is the maximum junction temperature rating for the S12MCH?
The S12MCH has a maximum junction temperature (TJ) rating of +150°C, verified per AEC-Q101 stress testing. This allows operation in under-hood automotive environments and enclosed industrial power supplies. Derating curves in the datasheet specify allowable IF versus ambient temperature, and the 9°C/W RθJL value supports thermal design using standard PCB copper areas. The S12MCH must not exceed this TJ limit during steady-state or transient conditions.
Is the S12MCH pin-compatible with other parts in the S12xCH series?
Yes - all S12xCH variants (S12GCH, S12JCH, S12KCH, S12MCH) share identical DO-214AB (SMC) package dimensions, pinout, and thermal pad layout. Only VRRM (400V–1000V), marking code (S12GC–S12MC), and associated electrical parameters differ. The S12MCH uses the same anode/cathode lead configuration and mounting footprint as the S12GCH, enabling voltage-scaling design reuse without PCB changes.
Does the S12MCH require pre-baking before reflow soldering?
No - the S12MCH is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and does not require baking prior to reflow. Its moisture sensitivity is negligible due to UL 94V-0 molding compound and hermetic glass passivation. Standard lead-free reflow profiles (peak 260°C) can be applied directly to the S12MCH without preconditioning, simplifying manufacturing flow and reducing cost.
What is the reverse leakage current specification for the S12MCH at elevated temperature?
The S12MCH specifies a maximum reverse leakage current (IR) of 250 µA at TJ = 125°C and rated VR, measured with 30ms pulse width. At 25°C, IR is ≤1 µA. This low, well-characterized leakage supports stable performance in high-impedance snubber networks and standby power circuits where cumulative leakage across multiple devices could otherwise cause regulation drift or false triggering.
How does the S12MCH's forward voltage compare to similar 1000V rectifiers?
The S12MCH has a maximum forward voltage (VF) of 1.1 V at 12A and 25°C - among the lowest for 1000V/12A rectifiers in DO-214AB package. Competing devices such as the MUR1210CT specify 1.3 V, resulting in ~22% higher conduction loss. This 0.2 V advantage directly reduces power dissipation by 2.4 W at full load, lowering thermal stress and improving system efficiency in compact automotive and industrial designs using the S12MCH.
S12MCH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 12 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 1000 V
- Capacitance @ Vr, F:
- 78pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S12MCH FAQ
1.How can I place an order for S12MCH through Aetrix?
Please submit a Request for Quotation (RFQ) for S12MCH 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 S12MCH reliable?
The price and inventory of S12MCH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S12MCH is usually 5 days.
3.What payment methods are accepted for S12MCH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S12MCH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S12MCH?
S12MCH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S12MCH 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 S12MCH?
For technical support, including S12MCH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S12MCH requirements.
6.How does Aetrix verify that S12MCH is sourced from the original manufacturer or authorized distributors?
All S12MCH 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 S12MCH meets industry standards.
7.What is the process for return or replacement of S12MCH?
All S12MCH units undergo pre-shipment inspection (PSI). If there is an issue with S12MCH, 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 S12MCH part is unused and in its original packaging.
Return procedure for S12MCH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
S12MCH Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
