5.0SMDJ85CA — AMSEMI 5000 W 85 V Bidirectional TVS (DO-214AB)
Intek Technology (INTEK, www.intek.vip) is an authorized distributor of AMSEMI (Anhui Anmei Semiconductor Co., Ltd) and is responsible for supply and selection support across the entire AMSEMI product line.
One-line takeaway: 5.0SMDJ85CA is a 5000 W bidirectional TVS in DO-214AB (SMC) with an 85 V stand-off voltage, clamping at 137.0 V at 36.5 A on the 10/1000 µs waveform, AEC-Q101 qualified. It is the grade for battery packs whose full-charge voltage lands between 75 V and 80 V — 18S NMC, 19S NMC and 22S LFP.
1. What this part is
5.0SMDJ85CA comes from the AMSEMI 5.0SMDJ family. The part number reads as: 5.0 = 5000 W peak pulse power class, SMDJ = surface-mount TVS in SMC, 85 = VRWM 85 V grade, C = bidirectional (A would be unidirectional). A bidirectional part clamps in both directions, which suits differential lines, AC signals and protection points where polarity is not fixed.
Body marking: 5PGV (unidirectional) / 5BGV (bidirectional) per the datasheet part-number table — use it to check incoming reels for mixed parts.
Its position: 5000 W surge capability, 85 V grade, bidirectional, automotive qualified. It sits between the 75 V and 90 V grades and covers the 75-80 V full-charge window that neither neighbour handles cleanly — 75 V leaves only 5-6% headroom there, and 90 V pushes the clamp to 146 V, forcing the MOSFET up to a 150 V device.
2. Key parameters
2.1 Electrical characteristics (Ta = 25 °C, 10/1000 µs waveform)
| Parameter | Symbol | Value | Note |
|---|---|---|---|
| Reverse stand-off voltage | VRWM | 85 V | — |
| Breakdown voltage (min / max) | VBR | 94.40 V / 104.00 V | at IT = 1 mA |
| Peak clamping voltage | Vc | 137.0 V | at Ipp = 36.5 A |
| Peak pulse current | Ipp | 36.5 A | 10/1000 µs |
| Maximum reverse leakage | IR | 5 µA | at VRWM |
| Peak pulse power | PDPM | 5000 W | 10/1000 µs |
2.2 Ratings and features
| Item | Value | Note |
|---|---|---|
| Package | DO-214AB (SMC) | Surface mount |
| Direction | Bidirectional (CA) | Clamps in both polarities |
| Automotive qualification | AEC-Q101 | — |
| Peak forward surge | IFSM 300 A (unidirectional) | 8.3 ms half sine |
| Junction temperature | -55 to +150 °C | — |
| ESD | IEC 61000-4-2, ±30 kV | Contact / air discharge |
The waveform has to be stated explicitly: every Vc and Ipp above is on the 10/1000 µs waveform from the AMSEMI datasheet (Document 8060014). That datasheet contains no 8/20 µs data at all. As a concrete example: Littelfuse publishes both
IPP 10x1000 µs = 36.5 AandIPP 8x20 µs = 273.8 Afor its own part under this name — the 273.8 A figure is Littelfuse's data on Littelfuse's part, and AMSEMI's datasheet has no such entry. The two cannot be mixed.
3. Standard grade vs foldback grade (5.0SMDJ85CA-N)
The 85 V grade is where the foldback option matters most, because the standard clamp lands between two MOSFET voltage classes.
| Item | 5.0SMDJ85CA (standard) | 5.0SMDJ85CA-N (foldback) | Delta |
|---|---|---|---|
| VRWM | 85 V | 85 V | same |
| VBR at 1 mA | 94.4 – 104.0 V | 94.4 – 104.0 V | same |
| Ipp (10/1000 µs) | 36.5 A | 36.5 A | same |
| Vc at Ipp | 137.0 V | 110.0 V | -27.0 V (-19.7%) |
| Body marking | 5BGV | 5NGV | — |
| Package | DO-214AB | DO-214AB | same, drop-in |
What those 27 V buy you: the standard part clamps at 137.0 V, which forces a 135 V or higher MOSFET — and 135 V is not a standard class, so designs end up jumping to 150 V. The foldback part clamps at 110.0 V and lets the main circuit settle on a 110 V device. The result is not "a bit more margin" but a move from a non-standard class back to a standard one, which simplifies both selection and purchasing.
Per AMSEMI's recommended-model table, the 18S NMC, 19S NMC and 22S LFP rows all land on this grade.
Drop-in note: same package, same 5000 W class, same VRWM / VBR / Ipp — no layout or pad change, just a part-number swap and a repeat surge validation.
One figure still open with the factory: the 8060055 cover sheet states 5000 W peak pulse power for the whole -N family, but Vc × Ipp gives 110.0 V × 36.5 A ≈ 4015 W for the 85 V foldback grade, while the standard grade computes to 5000.5 W. We publish the datasheet's 5000 W headline and flag the arithmetic gap rather than quietly quoting either number.
4. Package and ordering information
| Item | Content |
|---|---|
| Ordering code | 5.0SMDJ85CA (bidirectional) / 5.0SMDJ85A (unidirectional) |
| Package | DO-214AB (SMC), surface mount, body approx. 7.9 × 5.9 × 3.1 mm |
| Packing | 13-inch reel, 3000 pcs per inner box |
| Temperature range | -55 to +150 °C |
| Qualification | AEC-Q101 (automotive), RoHS, halogen-free |
| Brand | Anhui Anmei Semiconductor (AMSEMI) |
Cross-brand equivalents:
5.0SMDJ85CAis an industry-wide part number, and Littelfuse, Bourns, Eaton and YAGEO list parts under the same name. Same name does not mean same parameters — the VBR window, the waveform behind Vc, and the Ipp definition all differ between vendors, and Vc in particular moves a lot between 10/1000 µs and 8/20 µs. Check three things before substituting: VRWM, VBR window, and Vc together with the Ipp waveform it was measured on.
5. Typical applications
The datasheet lists transient voltage protection of sensitive electronics — inductive load switching, lightning and surge events on ICs, MOSFETs and sensor signal lines. With an 85 V grade the practical fits are:
BMS main circuit (per AMSEMI's recommended-model table for battery packs)
| Pack configuration (85 V grade) | Full-charge voltage | Vc: standard / foldback |
|---|---|---|
| 18S NMC | 75.6 V | 137 V / 110 V |
| 19S NMC | 79.8 V | 137 V / 110 V |
| 22S LFP | 80.3 V | 137 V / 110 V |
Other rails
- 60 V-class telecom and industrial power entries — load dump protection
- Battery-side input of power tools and e-bike controllers
- Auxiliary supply and communication-port surge protection on energy-storage inverters
- 24 V / 48 V automotive load dump (the part is AEC-Q101 qualified)
6. Stock and supply
| Item | Content |
|---|---|
| Quantity in stock | 45,000 pcs (counted 2026-09-28) |
| Brand | AMSEMI (Anhui Anmei) |
| Package / packing | DO-214AB (SMC) / 13-inch reel |
| Supply mode | Samples, low volume (broken reels), volume |
| Enquiry | Tel / WeChat 136-3264-8484 |
| Foldback version | 5.0SMDJ85CA-N quoted on request |
Stock moves. The figure above is a snapshot taken on 2026-09-28 — confirm live availability when you enquire. This page is updated or retired when a part is cleared out or re-scheduled.
FAQ
Q1. What is the difference between 5.0SMDJ85CA and 5.0SMDJ85CA-N?
Same VRWM 85 V, same VBR window 94.4-104.0 V at 1 mA, same Ipp 36.5 A on the 10/1000 us waveform, same DO-214AB package. The only difference is peak clamping voltage: 137.0 V for the standard part versus 110.0 V for the foldback -N part, 19.7% lower. It is a drop-in swap with no layout change, and it lets the main-circuit MOSFET drop from the 150 V class to the 110 V class.
Q2. Which 5.0SMDJ grade fits an 18S or 19S battery pack?
Work back from the full-charge voltage: VRWM must be at least 1.1 times the highest bus voltage, and Vc must stay below the downstream MOSFET VDS rating. An 18S NMC pack at 75.6 V, a 19S NMC pack at 79.8 V and a 22S LFP pack at 80.3 V all land on the 85 V grade, 5.0SMDJ85CA.
Q3. Can another brand 5.0SMDJ85CA be used as a substitute?
5.0SMDJ85CA is an industry-standard name and Littelfuse, Bourns, Eaton and YAGEO all sell parts under it, but the same name does not guarantee the same numbers. Check three items before substituting: VRWM, the VBR window, and Vc together with the test waveform it was measured on (10/1000 us versus 8/20 us), because Vc differs a lot between the two waveforms. INTEK can provide a three-item comparison against the main brands for the same grade.
Q4. What is the stock position and can I get samples?
45,000 pcs in stock as of the 2026-09-28 count. Samples, low volume and volume orders are all supported - call or WeChat 136-3264-8484.
Contact us
Tell us the rail voltage, the surge test level and the waveform, and we will match the grade against the actual clamping curve and send samples for validation. Contact us.
Shenzhen Intek Technology Co., Ltd — electronic components distributor and system solutions provider Tel / WeChat: 136-3264-8484 Address: 4F, Building 2, Jingwei Center, No. 309 Pingan Avenue, Pinghu Street, Longgang District, Shenzhen, China Web: www.intek.vip
Disclaimer: this page is technical information for engineers. All parameters are quoted from the manufacturer datasheet and are subject to change. Always verify against the current datasheet of the exact part you intend to buy, and validate with surge testing on your own board. Nothing here constitutes a procurement or design-warranty commitment.